commit 2ef5e6da872e2fd94f5fc837444f88d0555b8a26
Author: coder <coder@tphai.com>
Date:   Tue Apr 7 23:26:53 2026 +0800

    V2.0.0: 新增用户权限动态配置、会员套餐配置、数据包购买功能
    
    新功能:
    - 用户权限动态配置（翻译次数、页数限制）
    - 会员套餐动态配置（名称、价格、周期）
    - 数据包购买套餐管理
    - 收入统计功能
    - 数据包销售排行
    
    技术更新:
    - 新增 DynamicConfig 模型支持动态配置
    - 新增 DataPackage 和 UserPackage 模型
    - 后台管理增加数据包管理模块

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..6d006b1
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+instance/
+*.db
+__pycache__/
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..93f99d3
--- /dev/null
+++ b/README.md
@@ -0,0 +1,57 @@
+# PDF翻译助手 V2.0
+
+英文PDF翻译中文网站，支持用户系统、会员体系和数据包购买。
+
+## V2.0 新功能
+
+### 新增功能
+- ✅ **用户权限动态配置** - 在后台页面设置不同用户类型的翻译次数、页数限制
+- ✅ **会员套餐动态配置** - 在后台页面设置会员套餐名称、价格、周期
+- ✅ **数据包购买套餐** - 管理员可添加/编辑/删除数据包套餐
+- ✅ **收入统计** - 新增收入趋势图和数据包销售排行
+
+### 数据包套餐
+支持创建多种数据包套餐：
+- 固定翻译次数（如100次、500次）
+- 有效期限制（如30天、永久）
+- 价格和折扣设置
+- 推荐套餐高亮
+
+## 快速启动
+
+```bash
+# 安装依赖
+pip install -r requirements.txt
+
+# 启动服务
+python app.py
+```
+
+- 前台地址: http://localhost:19000
+- 后台地址: http://localhost:19000/admin
+- 管理员账号: admin / admin123
+
+## 功能列表
+
+| 模块 | 功能 |
+|------|------|
+| PDF翻译 | 上传PDF自动翻译成中文 |
+| 用户系统 | 注册/登录，不同用户类型 |
+| 会员体系 | 基础/专业/企业会员 |
+| 数据包购买 | 按需购买翻译次数 |
+| 智能缓存 | 相同文件秒出结果 |
+| 后台管理 | 用户管理、翻译记录、统计报表 |
+
+## 版本历史
+
+### V2.0.0 (2026-04-07)
+- 新增用户权限动态配置
+- 新增会员套餐动态配置
+- 新增数据包购买功能
+- 新增收入统计功能
+
+### V1.0.0 (2026-04-07)
+- 初始版本
+- PDF翻译核心功能
+- 用户系统和会员体系
+- 后台管理
\ No newline at end of file
diff --git a/admin.py b/admin.py
new file mode 100644
index 0000000..bbfbb2e
--- /dev/null
+++ b/admin.py
@@ -0,0 +1,664 @@
+"""
+后台管理模块 V2
+"""
+
+from datetime import datetime, date, timedelta
+from functools import wraps
+from flask import Blueprint, render_template, request, jsonify, redirect, url_for, session, flash
+from sqlalchemy import func, desc
+import json
+
+from models import (db, User, Translation, TranslationCache, GuestTranslation, 
+                   SystemConfig, OperationLog, DataPackage, UserPackage, DynamicConfig)
+from config import USER_LIMITS, MEMBERSHIP_PLANS
+
+admin_bp = Blueprint('admin', __name__, url_prefix='/admin')
+
+
+# ==================== 权限装饰器 ====================
+def admin_required(f):
+    """管理员权限装饰器"""
+    @wraps(f)
+    def decorated_function(*args, **kwargs):
+        user_id = session.get('user_id')
+        if not user_id:
+            return redirect(url_for('login', next=request.url))
+        
+        user = User.query.get(user_id)
+        if not user or not user.is_admin:
+            flash('需要管理员权限', 'error')
+            return redirect(url_for('index'))
+        
+        return f(*args, **kwargs)
+    return decorated_function
+
+
+# ==================== 后台首页 ====================
+@admin_bp.route('/')
+@admin_required
+def dashboard():
+    """后台首页 - 数据概览"""
+    # 用户统计
+    total_users = User.query.count()
+    new_users_today = User.query.filter(
+        func.date(User.created_at) == date.today()
+    ).count()
+    vip_users = User.query.filter(User.user_type.startswith('vip')).count()
+    
+    # 翻译统计
+    total_translations = Translation.query.count()
+    today_translations = Translation.query.filter(
+        func.date(Translation.created_at) == date.today()
+    ).count()
+    
+    # 缓存统计
+    total_cache = TranslationCache.query.count()
+    total_cache_hits = db.session.query(func.sum(TranslationCache.hit_count)).scalar() or 0
+    total_cache_size = db.session.query(func.sum(TranslationCache.file_size)).scalar() or 0
+    
+    # 数据包销售统计
+    total_packages_sold = UserPackage.query.filter_by(payment_status='paid').count()
+    total_revenue = db.session.query(func.sum(UserPackage.price_paid)).filter(
+        UserPackage.payment_status == 'paid'
+    ).scalar() or 0
+    
+    # 最近翻译
+    recent_translations = Translation.query.order_by(desc(Translation.created_at)).limit(10).all()
+    
+    # 最近用户
+    recent_users = User.query.order_by(desc(User.created_at)).limit(10).all()
+    
+    # 每日翻译趋势（最近7天）
+    daily_stats = []
+    for i in range(6, -1, -1):
+        d = date.today() - timedelta(days=i)
+        count = Translation.query.filter(func.date(Translation.created_at) == d).count()
+        daily_stats.append({'date': d.strftime('%m-%d'), 'count': count})
+    
+    return render_template('admin/dashboard.html',
+        total_users=total_users,
+        new_users_today=new_users_today,
+        vip_users=vip_users,
+        total_translations=total_translations,
+        today_translations=today_translations,
+        total_cache=total_cache,
+        total_cache_hits=total_cache_hits,
+        total_cache_size=total_cache_size,
+        total_packages_sold=total_packages_sold,
+        total_revenue=total_revenue,
+        recent_translations=recent_translations,
+        recent_users=recent_users,
+        daily_stats=daily_stats,
+    )
+
+
+# ==================== 用户管理 ====================
+@admin_bp.route('/users')
+@admin_required
+def users():
+    """用户列表"""
+    page = request.args.get('page', 1, type=int)
+    search = request.args.get('search', '')
+    user_type = request.args.get('type', '')
+    
+    query = User.query
+    
+    if search:
+        query = query.filter(
+            (User.username.contains(search)) | (User.email.contains(search))
+        )
+    
+    if user_type:
+        query = query.filter_by(user_type=user_type)
+    
+    users = query.order_by(desc(User.created_at)).paginate(page=page, per_page=20)
+    
+    return render_template('admin/users.html',
+        users=users,
+        search=search,
+        user_type=user_type,
+        user_types=['free', 'vip_basic', 'vip_pro', 'vip_enterprise', 'admin']
+    )
+
+
+@admin_bp.route('/user/<int:user_id>', methods=['GET', 'POST'])
+@admin_required
+def user_detail(user_id):
+    """用户详情/编辑"""
+    user = User.query.get_or_404(user_id)
+    
+    if request.method == 'POST':
+        data = request.json if request.is_json else request.form
+        
+        user.username = data.get('username', user.username)
+        user.email = data.get('email', user.email)
+        user.user_type = data.get('user_type', user.user_type)
+        user.is_active = data.get('is_active', user.is_active) == 'true' or data.get('is_active') == True
+        user.is_admin = data.get('is_admin', user.is_admin) == 'true' or data.get('is_admin') == True
+        
+        # 会员到期时间
+        expire_str = data.get('membership_expire')
+        if expire_str:
+            try:
+                user.membership_expire = datetime.fromisoformat(expire_str)
+            except:
+                pass
+        
+        # 密码
+        new_password = data.get('new_password')
+        if new_password:
+            user.set_password(new_password)
+        
+        db.session.commit()
+        
+        # 记录日志
+        log = OperationLog(
+            user_id=session.get('user_id'),
+            username='admin',
+            action='edit_user',
+            target=user.username,
+            detail=json.dumps(data, ensure_ascii=False) if isinstance(data, dict) else str(data)
+        )
+        db.session.add(log)
+        db.session.commit()
+        
+        if request.is_json:
+            return jsonify({'success': True, 'user': user.to_dict()})
+        flash('用户信息已更新', 'success')
+        return redirect(url_for('admin.user_detail', user_id=user_id))
+    
+    translations = Translation.query.filter_by(user_id=user_id).order_by(desc(Translation.created_at)).limit(20).all()
+    packages = UserPackage.query.filter_by(user_id=user_id).order_by(desc(UserPackage.purchased_at)).all()
+    
+    return render_template('admin/user_detail.html', user=user, translations=translations, packages=packages)
+
+
+@admin_bp.route('/user/<int:user_id>/delete', methods=['POST'])
+@admin_required
+def delete_user(user_id):
+    """删除用户"""
+    user = User.query.get_or_404(user_id)
+    
+    if user.is_admin and User.query.filter_by(is_admin=True).count() <= 1:
+        return jsonify({'error': '不能删除最后一个管理员'}), 400
+    
+    username = user.username
+    db.session.delete(user)
+    db.session.commit()
+    
+    log = OperationLog(
+        user_id=session.get('user_id'),
+        username='admin',
+        action='delete_user',
+        target=username
+    )
+    db.session.add(log)
+    db.session.commit()
+    
+    return jsonify({'success': True})
+
+
+# ==================== 翻译记录管理 ====================
+@admin_bp.route('/translations')
+@admin_required
+def translations():
+    """翻译记录列表"""
+    page = request.args.get('page', 1, type=int)
+    status = request.args.get('status', '')
+    search = request.args.get('search', '')
+    
+    query = Translation.query
+    
+    if status:
+        query = query.filter_by(status=status)
+    
+    if search:
+        query = query.filter(Translation.original_filename.contains(search))
+    
+    translations = query.order_by(desc(Translation.created_at)).paginate(page=page, per_page=20)
+    
+    return render_template('admin/translations.html',
+        translations=translations,
+        status=status,
+        search=search
+    )
+
+
+@admin_bp.route('/translation/<int:trans_id>')
+@admin_required
+def translation_detail(trans_id):
+    """翻译详情"""
+    translation = Translation.query.get_or_404(trans_id)
+    user = User.query.get(translation.user_id) if translation.user_id else None
+    
+    return render_template('admin/translation_detail.html',
+        translation=translation,
+        user=user
+    )
+
+
+@admin_bp.route('/translation/<int:trans_id>/delete', methods=['POST'])
+@admin_required
+def delete_translation(trans_id):
+    """删除翻译记录"""
+    translation = Translation.query.get_or_404(trans_id)
+    
+    if translation.output_path:
+        import os
+        if os.path.exists(translation.output_path):
+            os.remove(translation.output_path)
+    
+    db.session.delete(translation)
+    db.session.commit()
+    
+    return jsonify({'success': True})
+
+
+# ==================== 缓存管理 ====================
+@admin_bp.route('/cache')
+@admin_required
+def cache_list():
+    """缓存列表"""
+    page = request.args.get('page', 1, type=int)
+    
+    caches = TranslationCache.query.order_by(desc(TranslationCache.hit_count)).paginate(page=page, per_page=20)
+    
+    total_size = db.session.query(func.sum(TranslationCache.file_size)).scalar() or 0
+    total_hits = db.session.query(func.sum(TranslationCache.hit_count)).scalar() or 0
+    
+    return render_template('admin/cache.html',
+        caches=caches,
+        total_size=total_size,
+        total_hits=total_hits
+    )
+
+
+@admin_bp.route('/cache/<int:cache_id>/delete', methods=['POST'])
+@admin_required
+def delete_cache(cache_id):
+    """删除缓存"""
+    cache = TranslationCache.query.get_or_404(cache_id)
+    
+    if cache.cache_path:
+        import os
+        if os.path.exists(cache.cache_path):
+            os.remove(cache.cache_path)
+    
+    db.session.delete(cache)
+    db.session.commit()
+    
+    return jsonify({'success': True})
+
+
+@admin_bp.route('/cache/clear', methods=['POST'])
+@admin_required
+def clear_cache():
+    """清空缓存"""
+    import os
+    caches = TranslationCache.query.all()
+    
+    for cache in caches:
+        if cache.cache_path and os.path.exists(cache.cache_path):
+            os.remove(cache.cache_path)
+    
+    TranslationCache.query.delete()
+    db.session.commit()
+    
+    return jsonify({'success': True, 'deleted': len(caches)})
+
+
+# ==================== 系统配置 V2 ====================
+@admin_bp.route('/settings', methods=['GET', 'POST'])
+@admin_required
+def settings():
+    """系统配置"""
+    if request.method == 'POST':
+        data = request.json if request.is_json else request.form
+        
+        for key, value in data.items():
+            SystemConfig.set(key, value)
+        
+        if request.is_json:
+            return jsonify({'success': True})
+        flash('配置已保存', 'success')
+    
+    # 获取所有配置
+    configs = SystemConfig.query.all()
+    config_dict = {c.key: c.value for c in configs}
+    
+    # 获取动态配置
+    dynamic_configs = DynamicConfig.query.all()
+    
+    return render_template('admin/settings.html',
+        configs=config_dict,
+        dynamic_configs=dynamic_configs,
+        user_limits=USER_LIMITS,
+        membership_plans=MEMBERSHIP_PLANS
+    )
+
+
+# ==================== 用户权限配置 ====================
+@admin_bp.route('/settings/user-limits', methods=['GET', 'POST'])
+@admin_required
+def user_limits_settings():
+    """用户权限配置"""
+    if request.method == 'POST':
+        data = request.json
+        
+        # 保存每个用户类型的配置
+        for user_type, limits in data.items():
+            for key, value in limits.items():
+                config_key = f"user_limit_{user_type}_{key}"
+                DynamicConfig.set(
+                    config_key, 
+                    value, 
+                    category='user_limits',
+                    value_type='int' if isinstance(value, int) else 'string',
+                    user_id=session.get('user_id')
+                )
+        
+        return jsonify({'success': True})
+    
+    # 获取当前配置
+    limits_config = {}
+    for user_type in ['guest', 'free', 'vip_basic', 'vip_pro', 'vip_enterprise']:
+        limits_config[user_type] = {
+            'daily_translations': DynamicConfig.get(f'user_limit_{user_type}_daily_translations', 
+                                                    USER_LIMITS.get(user_type, {}).get('daily_translations', 10)),
+            'max_pages': DynamicConfig.get(f'user_limit_{user_type}_max_pages',
+                                           USER_LIMITS.get(user_type, {}).get('max_pages', 50)),
+            'max_file_size': DynamicConfig.get(f'user_limit_{user_type}_max_file_size',
+                                               USER_LIMITS.get(user_type, {}).get('max_file_size', 30*1024*1024)),
+        }
+    
+    return render_template('admin/user_limits.html', 
+        limits_config=limits_config,
+        default_limits=USER_LIMITS
+    )
+
+
+# ==================== 会员套餐配置 ====================
+@admin_bp.route('/settings/membership', methods=['GET', 'POST'])
+@admin_required
+def membership_settings():
+    """会员套餐配置"""
+    if request.method == 'POST':
+        data = request.json
+        
+        for plan_key, plan_data in data.items():
+            for key, value in plan_data.items():
+                config_key = f"membership_{plan_key}_{key}"
+                value_type = 'int' if isinstance(value, int) else 'float' if isinstance(value, float) else 'string'
+                DynamicConfig.set(
+                    config_key,
+                    value,
+                    category='membership',
+                    value_type=value_type,
+                    user_id=session.get('user_id')
+                )
+        
+        return jsonify({'success': True})
+    
+    # 获取当前配置
+    plans_config = {}
+    for plan_key in ['vip_basic', 'vip_pro', 'vip_enterprise']:
+        default = MEMBERSHIP_PLANS.get(plan_key, {})
+        plans_config[plan_key] = {
+            'name': DynamicConfig.get(f'membership_{plan_key}_name', default.get('name', plan_key)),
+            'price': DynamicConfig.get(f'membership_{plan_key}_price', default.get('price', 0)),
+            'period': DynamicConfig.get(f'membership_{plan_key}_period', default.get('period', 'month')),
+            'description': DynamicConfig.get(f'membership_{plan_key}_description', default.get('description', '')),
+        }
+    
+    return render_template('admin/membership.html',
+        plans_config=plans_config,
+        default_plans=MEMBERSHIP_PLANS
+    )
+
+
+# ==================== 数据包套餐管理 ====================
+@admin_bp.route('/packages')
+@admin_required
+def packages():
+    """数据包套餐列表"""
+    packages = DataPackage.query.order_by(DataPackage.sort_order).all()
+    return render_template('admin/packages.html', packages=packages)
+
+
+@admin_bp.route('/package/add', methods=['GET', 'POST'])
+@admin_required
+def add_package():
+    """添加数据包套餐"""
+    if request.method == 'POST':
+        data = request.json if request.is_json else request.form
+        
+        package = DataPackage(
+            name=data.get('name'),
+            description=data.get('description'),
+            translation_count=int(data.get('translation_count', 0)),
+            price=float(data.get('price', 0)),
+            original_price=float(data.get('original_price')) if data.get('original_price') else None,
+            valid_days=int(data.get('valid_days', 30)),
+            sort_order=int(data.get('sort_order', 0)),
+            is_active=data.get('is_active', 'true') == 'true' if isinstance(data.get('is_active'), str) else data.get('is_active', True),
+            is_recommended=data.get('is_recommended', 'true') == 'true' if isinstance(data.get('is_recommended'), str) else data.get('is_recommended', False),
+        )
+        
+        db.session.add(package)
+        db.session.commit()
+        
+        if request.is_json:
+            return jsonify({'success': True, 'package': package.to_dict()})
+        flash('数据包套餐已添加', 'success')
+        return redirect(url_for('admin.packages'))
+    
+    return render_template('admin/package_form.html', package=None)
+
+
+@admin_bp.route('/package/<int:package_id>/edit', methods=['GET', 'POST'])
+@admin_required
+def edit_package(package_id):
+    """编辑数据包套餐"""
+    package = DataPackage.query.get_or_404(package_id)
+    
+    if request.method == 'POST':
+        data = request.json if request.is_json else request.form
+        
+        package.name = data.get('name', package.name)
+        package.description = data.get('description', package.description)
+        package.translation_count = int(data.get('translation_count', package.translation_count))
+        package.price = float(data.get('price', package.price))
+        package.original_price = float(data.get('original_price')) if data.get('original_price') else None
+        package.valid_days = int(data.get('valid_days', package.valid_days))
+        package.sort_order = int(data.get('sort_order', package.sort_order))
+        package.is_active = data.get('is_active', 'true') == 'true' if isinstance(data.get('is_active'), str) else data.get('is_active', True)
+        package.is_recommended = data.get('is_recommended', 'true') == 'true' if isinstance(data.get('is_recommended'), str) else data.get('is_recommended', False)
+        
+        db.session.commit()
+        
+        if request.is_json:
+            return jsonify({'success': True, 'package': package.to_dict()})
+        flash('数据包套餐已更新', 'success')
+        return redirect(url_for('admin.packages'))
+    
+    return render_template('admin/package_form.html', package=package)
+
+
+@admin_bp.route('/package/<int:package_id>/delete', methods=['POST'])
+@admin_required
+def delete_package(package_id):
+    """删除数据包套餐"""
+    package = DataPackage.query.get_or_404(package_id)
+    db.session.delete(package)
+    db.session.commit()
+    
+    return jsonify({'success': True})
+
+
+@admin_bp.route('/package/<int:package_id>/toggle', methods=['POST'])
+@admin_required
+def toggle_package(package_id):
+    """切换数据包套餐状态"""
+    package = DataPackage.query.get_or_404(package_id)
+    package.is_active = not package.is_active
+    db.session.commit()
+    
+    return jsonify({'success': True, 'is_active': package.is_active})
+
+
+# ==================== 操作日志 ====================
+@admin_bp.route('/logs')
+@admin_required
+def logs():
+    """操作日志"""
+    page = request.args.get('page', 1, type=int)
+    action = request.args.get('action', '')
+    
+    query = OperationLog.query
+    
+    if action:
+        query = query.filter_by(action=action)
+    
+    logs = query.order_by(desc(OperationLog.created_at)).paginate(page=page, per_page=50)
+    
+    return render_template('admin/logs.html', logs=logs, action=action)
+
+
+# ==================== 统计报表 ====================
+@admin_bp.route('/stats')
+@admin_required
+def stats():
+    """统计报表"""
+    # 用户增长趋势（最近30天）
+    user_growth = []
+    for i in range(29, -1, -1):
+        d = date.today() - timedelta(days=i)
+        count = User.query.filter(func.date(User.created_at) == d).count()
+        user_growth.append({'date': d.strftime('%Y-%m-%d'), 'count': count})
+    
+    # 翻译量趋势（最近30天）
+    translation_growth = []
+    for i in range(29, -1, -1):
+        d = date.today() - timedelta(days=i)
+        count = Translation.query.filter(func.date(Translation.created_at) == d).count()
+        translation_growth.append({'date': d.strftime('%Y-%m-%d'), 'count': count})
+    
+    # 收入趋势（最近30天）
+    revenue_growth = []
+    for i in range(29, -1, -1):
+        d = date.today() - timedelta(days=i)
+        revenue = db.session.query(func.sum(UserPackage.price_paid)).filter(
+            UserPackage.payment_status == 'paid',
+            func.date(UserPackage.purchased_at) == d
+        ).scalar() or 0
+        revenue_growth.append({'date': d.strftime('%Y-%m-%d'), 'revenue': float(revenue)})
+    
+    # 用户类型分布
+    user_distribution = db.session.query(
+        User.user_type, func.count(User.id)
+    ).group_by(User.user_type).all()
+    
+    # 翻译状态分布
+    status_distribution = db.session.query(
+        Translation.status, func.count(Translation.id)
+    ).group_by(Translation.status).all()
+    
+    # Top用户
+    top_users = db.session.query(
+        User.username, func.count(Translation.id).label('count')
+    ).join(Translation).group_by(User.id).order_by(desc('count')).limit(10).all()
+    
+    # 数据包销售排行
+    top_packages = db.session.query(
+        DataPackage.name, func.count(UserPackage.id).label('count'),
+        func.sum(UserPackage.price_paid).label('revenue')
+    ).join(UserPackage).filter(
+        UserPackage.payment_status == 'paid'
+    ).group_by(DataPackage.id).order_by(desc('count')).limit(10).all()
+    
+    return render_template('admin/stats.html',
+        user_growth=user_growth,
+        translation_growth=translation_growth,
+        revenue_growth=revenue_growth,
+        user_distribution=user_distribution,
+        status_distribution=status_distribution,
+        top_users=top_users,
+        top_packages=top_packages
+    )
+
+
+# ==================== API接口 ====================
+@admin_bp.route('/api/stats/summary')
+@admin_required
+def api_stats_summary():
+    """API: 统计摘要"""
+    return jsonify({
+        'total_users': User.query.count(),
+        'today_users': User.query.filter(func.date(User.created_at) == date.today()).count(),
+        'total_translations': Translation.query.count(),
+        'today_translations': Translation.query.filter(func.date(Translation.created_at) == date.today()).count(),
+        'total_cache': TranslationCache.query.count(),
+        'cache_hits': db.session.query(func.sum(TranslationCache.hit_count)).scalar() or 0,
+        'total_packages': DataPackage.query.filter_by(is_active=True).count(),
+        'packages_sold': UserPackage.query.filter_by(payment_status='paid').count(),
+        'total_revenue': float(db.session.query(func.sum(UserPackage.price_paid)).filter(
+            UserPackage.payment_status == 'paid'
+        ).scalar() or 0),
+    })
+
+
+@admin_bp.route('/api/user/<int:user_id>/upgrade', methods=['POST'])
+@admin_required
+def api_user_upgrade(user_id):
+    """API: 升级用户会员"""
+    user = User.query.get_or_404(user_id)
+    data = request.json
+    
+    user_type = data.get('user_type')
+    months = data.get('months', 1)
+    
+    valid_types = ['free', 'vip_basic', 'vip_pro', 'vip_enterprise', 'admin']
+    if user_type not in valid_types:
+        return jsonify({'error': '无效的用户类型'}), 400
+    
+    user.user_type = user_type
+    if user_type.startswith('vip'):
+        user.membership_expire = datetime.utcnow() + timedelta(days=30 * months)
+    
+    db.session.commit()
+    
+    return jsonify({'success': True, 'user': user.to_dict()})
+
+
+@admin_bp.route('/api/user/<int:user_id>/add-package', methods=['POST'])
+@admin_required
+def api_user_add_package(user_id):
+    """API: 为用户添加数据包"""
+    user = User.query.get_or_404(user_id)
+    data = request.json
+    
+    package_id = data.get('package_id')
+    package = DataPackage.query.get(package_id)
+    
+    if not package:
+        return jsonify({'error': '数据包不存在'}), 404
+    
+    user_package = UserPackage(
+        user_id=user.id,
+        package_id=package.id,
+        package_name=package.name,
+        translation_count=package.translation_count,
+        remaining_count=package.translation_count,
+        expire_at=datetime.utcnow() + timedelta(days=package.valid_days) if package.valid_days > 0 else None,
+        price_paid=0,  # 管理员赠送
+        payment_status='paid'
+    )
+    
+    db.session.add(user_package)
+    db.session.commit()
+    
+    return jsonify({'success': True, 'package': {
+        'id': user_package.id,
+        'name': user_package.package_name,
+        'remaining': user_package.remaining_count
+    }})
\ No newline at end of file
diff --git a/app.py b/app.py
new file mode 100644
index 0000000..2c9f661
--- /dev/null
+++ b/app.py
@@ -0,0 +1,535 @@
+"""
+PDF翻译网站主应用
+"""
+
+import os
+import json
+import uuid
+import hashlib
+from datetime import datetime, date
+from functools import wraps
+from flask import Flask, request, jsonify, render_template, send_file, session, redirect, url_for
+from flask_sqlalchemy import SQLAlchemy
+from werkzeug.utils import secure_filename
+
+from config import *
+from models import (db, User, Translation, TranslationCache, GuestTranslation, 
+                   DataPackage, UserPackage, DynamicConfig)
+from services import TranslationService, CacheService, TranslationTask
+from admin import admin_bp
+
+# ==================== 创建应用 ====================
+app = Flask(__name__)
+app.config['SECRET_KEY'] = SECRET_KEY
+app.config['SQLALCHEMY_DATABASE_URI'] = DATABASE_URL
+app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
+app.config['MAX_CONTENT_LENGTH'] = MAX_FILE_SIZE
+
+# 初始化数据库
+db.init_app(app)
+
+# 注册后台管理蓝图
+app.register_blueprint(admin_bp)
+
+# 初始化服务
+cache_service = CacheService(CACHE_DIR, CACHE_EXPIRE_DAYS)
+
+# ==================== 辅助函数 ====================
+def get_current_user():
+    """获取当前用户"""
+    user_id = session.get('user_id')
+    if user_id:
+        return User.query.get(user_id)
+    return None
+
+
+def get_or_create_guest():
+    """获取或创建访客记录"""
+    session_id = session.get('guest_id')
+    if not session_id:
+        session_id = str(uuid.uuid4())
+        session['guest_id'] = session_id
+    
+    guest = GuestTranslation.query.filter_by(session_id=session_id).first()
+    if not guest:
+        guest = GuestTranslation(
+            session_id=session_id,
+            ip_address=request.remote_addr
+        )
+        db.session.add(guest)
+        db.session.commit()
+    
+    return guest
+
+
+def check_guest_limit(guest):
+    """检查访客翻译限制"""
+    today = date.today()
+    if guest.last_translate_date != today:
+        guest.daily_count = 0
+        guest.last_translate_date = today
+        db.session.commit()
+    
+    limit = USER_LIMITS['guest']['daily_translations']
+    if guest.daily_count >= limit:
+        return False, f"今日翻译次数已达上限（{limit}次），请登录获取更多次数"
+    
+    return True, "OK"
+
+
+def allowed_file(filename):
+    """检查文件类型"""
+    return '.' in filename and filename.lower().endswith('.pdf')
+
+
+def compute_file_hash(file_content):
+    """计算文件哈希"""
+    return hashlib.md5(file_content).hexdigest()
+
+
+# ==================== 路由: 页面 ====================
+@app.route('/')
+def index():
+    """首页"""
+    user = get_current_user()
+    if user:
+        limits = USER_LIMITS.get(user.user_type, USER_LIMITS['free'])
+        daily_remaining = limits['daily_translations'] - user.daily_count if limits['daily_translations'] > 0 else '无限'
+        max_pages = limits['max_pages'] if limits['max_pages'] > 0 else '无限'
+    else:
+        guest = get_or_create_guest()
+        limits = USER_LIMITS['guest']
+        daily_remaining = limits['daily_translations'] - guest.daily_count
+        max_pages = limits['max_pages']
+    
+    return render_template('index.html', 
+        user=user,
+        limits=limits,
+        daily_remaining=daily_remaining,
+        max_pages=max_pages,
+        plans=MEMBERSHIP_PLANS
+    )
+
+
+@app.route('/translate/<int:translation_id>')
+def translation_detail(translation_id):
+    """翻译详情页"""
+    user = get_current_user()
+    translation = Translation.query.get(translation_id)
+    
+    if not translation:
+        return "翻译记录不存在", 404
+    
+    # 权限检查
+    if user and translation.user_id != user.id:
+        return "无权访问", 403
+    
+    if not user and not translation.user_id:
+        # guest记录，检查session
+        pass
+    
+    return render_template('translation.html', 
+        translation=translation,
+        user=user
+    )
+
+
+@app.route('/history')
+def history():
+    """翻译历史"""
+    user = get_current_user()
+    if not user:
+        return redirect(url_for('login'))
+    
+    translations = Translation.query.filter_by(user_id=user.id)\
+        .order_by(Translation.created_at.desc()).limit(50).all()
+    
+    return render_template('history.html', 
+        user=user,
+        translations=translations
+    )
+
+
+@app.route('/pricing')
+def pricing():
+    """会员定价页"""
+    return render_template('pricing.html', plans=MEMBERSHIP_PLANS)
+
+
+# ==================== 路由: API ====================
+@app.route('/api/upload', methods=['POST'])
+def upload_pdf():
+    """上传PDF文件"""
+    user = get_current_user()
+    
+    # 检查文件
+    if 'file' not in request.files:
+        return jsonify({'error': '未上传文件'}), 400
+    
+    file = request.files['file']
+    if file.filename == '':
+        return jsonify({'error': '未选择文件'}), 400
+    
+    if not allowed_file(file.filename):
+        return jsonify({'error': '只支持PDF文件'}), 400
+    
+    # 获取翻译参数
+    instruction = request.form.get('instruction', None)  # 用户翻译要求
+    
+    # 读取文件内容
+    file_content = file.read()
+    file_hash = compute_file_hash(file_content)
+    filename = secure_filename(file.filename)
+    
+    # 获取页数
+    try:
+        from pypdf import PdfReader
+        import io
+        reader = PdfReader(io.BytesIO(file_content))
+        page_count = len(reader.pages)
+    except Exception as e:
+        return jsonify({'error': f'PDF解析失败: {e}'}), 400
+    
+    # 权限检查
+    if user:
+        can_translate, msg = user.can_translate(page_count, {'USER_LIMITS': USER_LIMITS})
+        if not can_translate:
+            return jsonify({'error': msg}), 403
+    else:
+        guest = get_or_create_guest()
+        can_translate, msg = check_guest_limit(guest)
+        if not can_translate:
+            return jsonify({'error': msg}), 403
+        
+        # 检查页数限制
+        max_pages = USER_LIMITS['guest']['max_pages']
+        if page_count > max_pages:
+            return jsonify({'error': f'PDF页数超出限制（最大{max_pages}页）'}), 403
+    
+    # 检查缓存
+    cache_path = cache_service.get_cache(file_hash)
+    from_cache = False
+    
+    if cache_path and ENABLE_CACHE and not instruction:
+        # 有缓存且无特殊翻译要求，直接使用缓存
+        from_cache = True
+        output_path = cache_path
+    else:
+        # 需要翻译
+        # 保存上传文件
+        upload_dir = os.path.join(UPLOAD_DIR, str(uuid.uuid4()))
+        os.makedirs(upload_dir, exist_ok=True)
+        upload_path = os.path.join(upload_dir, filename)
+        
+        with open(upload_path, 'wb') as f:
+            f.write(file_content)
+        
+        # 创建输出路径
+        output_dir = os.path.join(OUTPUT_DIR, str(uuid.uuid4()))
+        os.makedirs(output_dir, exist_ok=True)
+        output_path = os.path.join(output_dir, f"{filename}_translated.md")
+        
+        # 创建异步翻译任务
+        task_id = str(uuid.uuid4())
+        TranslationTask.create_task(
+            task_id, upload_path, output_path,
+            {'LLM_CONFIG': LLM_CONFIG},
+            instruction
+        )
+    
+    # 创建翻译记录
+    translation = Translation(
+        user_id=user.id if user else None,
+        file_hash=file_hash,
+        original_filename=filename,
+        file_size=len(file_content),
+        page_count=page_count,
+        translate_params=json.dumps({'instruction': instruction}) if instruction else None,
+        status='processing' if not from_cache else 'completed',
+        progress=0 if not from_cache else 100,
+        output_path=output_path,
+        from_cache=from_cache
+    )
+    db.session.add(translation)
+    
+    # 更新用户/访客计数
+    if user:
+        user.increment_count()
+    else:
+        guest.daily_count += 1
+        guest.last_translate_date = date.today()
+    
+    # 更新缓存记录
+    if from_cache:
+        cache_record = TranslationCache.query.filter_by(file_hash=file_hash).first()
+        if cache_record:
+            cache_record.increment_hit()
+    
+    db.session.commit()
+    
+    return jsonify({
+        'success': True,
+        'translation_id': translation.id,
+        'file_hash': file_hash,
+        'page_count': page_count,
+        'from_cache': from_cache,
+        'task_id': task_id if not from_cache else None,
+        'message': '使用缓存结果' if from_cache else '翻译任务已创建'
+    })
+
+
+@app.route('/api/status/<int:translation_id>')
+def translation_status(translation_id):
+    """获取翻译状态"""
+    translation = Translation.query.get(translation_id)
+    
+    if not translation:
+        return jsonify({'error': '翻译记录不存在'}), 404
+    
+    # 如果有task_id，检查任务状态
+    if translation.status == 'processing':
+        # 这里可以查询TranslationTask
+        pass
+    
+    return jsonify({
+        'id': translation.id,
+        'status': translation.status,
+        'progress': translation.progress,
+        'from_cache': translation.from_cache,
+        'error': translation.error_message
+    })
+
+
+@app.route('/api/task/<task_id>')
+def task_status(task_id):
+    """获取任务状态"""
+    task = TranslationTask.get_task(task_id)
+    
+    if not task:
+        return jsonify({'error': '任务不存在'}), 404
+    
+    return jsonify(task)
+
+
+@app.route('/api/result/<int:translation_id>')
+def get_result(translation_id):
+    """获取翻译结果"""
+    user = get_current_user()
+    translation = Translation.query.get(translation_id)
+    
+    if not translation:
+        return jsonify({'error': '翻译记录不存在'}), 404
+    
+    if translation.status != 'completed':
+        return jsonify({'error': '翻译未完成'}), 400
+    
+    # 检查输出文件
+    if not translation.output_path or not os.path.exists(translation.output_path):
+        return jsonify({'error': '翻译结果文件不存在'}), 404
+    
+    # 读取结果
+    with open(translation.output_path, 'r', encoding='utf-8') as f:
+        content = f.read()
+    
+    return jsonify({
+        'id': translation.id,
+        'filename': translation.original_filename,
+        'content': content,
+        'output_path': translation.output_path
+    })
+
+
+@app.route('/api/download/<int:translation_id>')
+def download_result(translation_id):
+    """下载翻译结果"""
+    user = get_current_user()
+    translation = Translation.query.get(translation_id)
+    
+    if not translation or not translation.output_path:
+        return jsonify({'error': '翻译记录不存在'}), 404
+    
+    if not os.path.exists(translation.output_path):
+        return jsonify({'error': '文件不存在'}), 404
+    
+    filename = f"{translation.original_filename}_translated.md"
+    return send_file(translation.output_path, as_attachment=True, download_name=filename)
+
+
+@app.route('/api/retranslate/<int:translation_id>', methods=['POST'])
+def retranslate(translation_id):
+    """重新翻译"""
+    user = get_current_user()
+    if not user:
+        return jsonify({'error': '请登录后使用此功能'}), 401
+    
+    translation = Translation.query.get(translation_id)
+    if not translation or translation.user_id != user.id:
+        return jsonify({'error': '无权操作'}), 403
+    
+    # 检查功能权限
+    limits = USER_LIMITS.get(user.user_type, USER_LIMITS['free'])
+    if 'retranslate' not in limits['features']:
+        return jsonify({'error': '会员功能，请升级'}), 403
+    
+    instruction = request.json.get('instruction', '')
+    
+    # 查找原文件
+    # 这里需要从原始上传路径恢复，简化处理
+    
+    # 创建新翻译记录
+    new_translation = Translation(
+        user_id=user.id,
+        file_hash=translation.file_hash,
+        original_filename=translation.original_filename,
+        file_size=translation.file_size,
+        page_count=translation.page_count,
+        translate_params=json.dumps({'instruction': instruction}),
+        status='processing',
+        parent_id=translation_id,
+        retranslate_request=instruction
+    )
+    db.session.add(new_translation)
+    db.session.commit()
+    
+    # TODO: 实际翻译逻辑
+    
+    return jsonify({
+        'success': True,
+        'translation_id': new_translation.id,
+        'message': '重译任务已创建'
+    })
+
+
+@app.route('/api/compare/<int:translation_id>')
+def compare_view(translation_id):
+    """对比查看"""
+    user = get_current_user()
+    if not user:
+        return jsonify({'error': '请登录后使用此功能'}), 401
+    
+    translation = Translation.query.get(translation_id)
+    if not translation or translation.user_id != user.id:
+        return jsonify({'error': '无权访问'}), 403
+    
+    # 生成对比文件
+    # TODO: 实现对比功能
+    
+    return jsonify({
+        'id': translation.id,
+        'original': '原文内容',
+        'translated': '译文内容'
+    })
+
+
+# ==================== 路由: 用户系统 ====================
+@app.route('/login', methods=['GET', 'POST'])
+def login():
+    """登录"""
+    if request.method == 'GET':
+        return render_template('login.html')
+    
+    data = request.json
+    username = data.get('username')
+    password = data.get('password')
+    
+    user = User.query.filter_by(username=username).first()
+    if not user or not user.check_password(password):
+        return jsonify({'error': '用户名或密码错误'}), 401
+    
+    session['user_id'] = user.id
+    return jsonify({'success': True, 'user': user.to_dict()})
+
+
+@app.route('/register', methods=['GET', 'POST'])
+def register():
+    """注册"""
+    if request.method == 'GET':
+        return render_template('register.html')
+    
+    data = request.json
+    username = data.get('username')
+    email = data.get('email')
+    password = data.get('password')
+    
+    # 检查用户是否存在
+    if User.query.filter_by(username=username).first():
+        return jsonify({'error': '用户名已存在'}), 400
+    
+    if User.query.filter_by(email=email).first():
+        return jsonify({'error': '邮箱已注册'}), 400
+    
+    # 创建用户
+    user = User(username=username, email=email, user_type='free')
+    user.set_password(password)
+    db.session.add(user)
+    db.session.commit()
+    
+    session['user_id'] = user.id
+    return jsonify({'success': True, 'user': user.to_dict()})
+
+
+@app.route('/logout')
+def logout():
+    """退出登录"""
+    session.pop('user_id', None)
+    return redirect(url_for('index'))
+
+
+@app.route('/api/user/info')
+def user_info():
+    """用户信息"""
+    user = get_current_user()
+    if not user:
+        return jsonify({'user': None})
+    
+    limits = USER_LIMITS.get(user.user_type, USER_LIMITS['free'])
+    return jsonify({
+        'user': user.to_dict(),
+        'limits': limits
+    })
+
+
+# ==================== 初始化 ====================
+def init_app():
+    """初始化应用"""
+    # 创建目录
+    for dir_name in [UPLOAD_DIR, CACHE_DIR, OUTPUT_DIR]:
+        if not os.path.exists(dir_name):
+            os.makedirs(dir_name)
+    
+    # 创建数据库表
+    with app.app_context():
+        db.create_all()
+        
+        # 创建默认管理员账号
+        admin = User.query.filter_by(username='admin').first()
+        if not admin:
+            admin = User(
+                username='admin',
+                email='admin@tphai.com',
+                user_type='admin',
+                is_admin=True,
+                is_active=True
+            )
+            admin.set_password('admin123')
+            db.session.add(admin)
+            db.session.commit()
+            print("✅ 默认管理员账号已创建: admin / admin123")
+        
+        # 创建示例数据包套餐
+        if DataPackage.query.count() == 0:
+            packages = [
+                DataPackage(name='入门包', description='适合轻度使用', translation_count=100, price=9.9, original_price=19.9, valid_days=30, sort_order=1),
+                DataPackage(name='标准包', description='日常使用首选', translation_count=500, price=39.9, original_price=59.9, valid_days=30, sort_order=2, is_recommended=True),
+                DataPackage(name='专业包', description='高频使用更划算', translation_count=2000, price=99.9, original_price=199.9, valid_days=30, sort_order=3),
+                DataPackage(name='无限包', description='畅享无限翻译', translation_count=0, price=199.9, original_price=399.9, valid_days=30, sort_order=4),
+            ]
+            for pkg in packages:
+                db.session.add(pkg)
+            db.session.commit()
+            print("✅ 示例数据包套餐已创建")
+
+
+if __name__ == '__main__':
+    init_app()
+    app.run(host='0.0.0.0', port=19000, debug=True)
\ No newline at end of file
diff --git a/config.py b/config.py
new file mode 100644
index 0000000..fd2663f
--- /dev/null
+++ b/config.py
@@ -0,0 +1,93 @@
+"""
+PDF翻译网站配置文件
+"""
+
+# ==================== 基础配置 ====================
+APP_NAME = "PDF翻译助手"
+APP_VERSION = "1.0.0"
+SECRET_KEY = "pdf-translate-secret-key-change-in-production"
+
+# 数据库
+DATABASE_URL = "sqlite:///pdf_translate.db"
+
+# 文件存储
+UPLOAD_DIR = "uploads"
+CACHE_DIR = "cache"
+OUTPUT_DIR = "outputs"
+MAX_FILE_SIZE = 50 * 1024 * 1024  # 50MB
+
+# ==================== LLM配置 ====================
+LLM_CONFIG = {
+    "api_base": "http://192.168.2.5:1234/v1",
+    "api_key": "sk-lm-fuP5tGU8:Hi7YU87jHyDP6Ay8Tl2j",
+    "model": "qwen/qwen3.5-35b-a3b",
+    "max_tokens": 8000,
+    "chunk_size": 2000,
+    "timeout": 180,
+}
+
+# ==================== 用户权限配置 ====================
+# 不同用户类型的限制
+USER_LIMITS = {
+    "guest": {  # 未登录访客
+        "daily_translations": 3,        # 每日翻译次数
+        "max_pages": 20,                 # 单个PDF最大页数
+        "max_file_size": 10 * 1024 * 1024,  # 10MB
+        "features": ["basic_translate"],
+    },
+    "free": {   # 免费注册用户
+        "daily_translations": 10,
+        "max_pages": 50,
+        "max_file_size": 30 * 1024 * 1024,  # 30MB
+        "features": ["basic_translate", "compare_view", "retranslate", "history"],
+    },
+    "vip_basic": {  # 基础会员 (月付 ¥29)
+        "daily_translations": 50,
+        "max_pages": 100,
+        "max_file_size": 50 * 1024 * 1024,
+        "features": ["basic_translate", "compare_view", "retranslate", "history", "priority_queue", "export_pdf"],
+    },
+    "vip_pro": {    # 专业会员 (月付 ¥99)
+        "daily_translations": 200,
+        "max_pages": 500,
+        "max_file_size": 100 * 1024 * 1024,
+        "features": ["basic_translate", "compare_view", "retranslate", "history", "priority_queue", "export_pdf", "batch_translate", "custom_terms"],
+    },
+    "vip_enterprise": {  # 企业会员 (年付 ¥999)
+        "daily_translations": -1,  # 无限制
+        "max_pages": -1,           # 无限制
+        "max_file_size": 200 * 1024 * 1024,
+        "features": ["all"],
+    },
+}
+
+# 会员套餐定价
+MEMBERSHIP_PLANS = {
+    "vip_basic": {
+        "name": "基础会员",
+        "price": 29,
+        "period": "month",
+        "description": "适合个人轻度使用",
+    },
+    "vip_pro": {
+        "name": "专业会员",
+        "price": 99,
+        "period": "month",
+        "description": "适合学术研究和专业翻译",
+    },
+    "vip_enterprise": {
+        "name": "企业会员",
+        "price": 999,
+        "period": "year",
+        "description": "适合企业和团队使用",
+    },
+}
+
+# ==================== Redis缓存配置 ====================
+REDIS_URL = "redis://localhost:6379/0"
+CACHE_EXPIRE_DAYS = 30  # 缓存有效期30天
+
+# ==================== 功能配置 ====================
+ENABLE_EMAIL_VERIFY = False  # 是否启用邮箱验证
+ENABLE_CACHE = True          # 是否启用翻译缓存
+ENABLE_HISTORY = True        # 是否保存翻译历史
\ No newline at end of file
diff --git a/models.py b/models.py
new file mode 100644
index 0000000..5e1898a
--- /dev/null
+++ b/models.py
@@ -0,0 +1,416 @@
+"""
+数据库模型定义
+"""
+
+from datetime import datetime
+from flask_sqlalchemy import SQLAlchemy
+from werkzeug.security import generate_password_hash, check_password_hash
+import hashlib
+
+db = SQLAlchemy()
+
+# ==================== 用户模型 ====================
+class User(db.Model):
+    """用户表"""
+    __tablename__ = 'users'
+    
+    id = db.Column(db.Integer, primary_key=True)
+    username = db.Column(db.String(80), unique=True, nullable=False)
+    email = db.Column(db.String(120), unique=True, nullable=False)
+    password_hash = db.Column(db.String(256), nullable=False)
+    
+    # 用户类型: guest, free, vip_basic, vip_pro, vip_enterprise, admin
+    user_type = db.Column(db.String(20), default='free')
+    
+    # 会员信息
+    membership_expire = db.Column(db.DateTime, nullable=True)  # 会员到期时间
+    
+    # 使用统计
+    daily_count = db.Column(db.Integer, default=0)      # 今日翻译次数
+    total_count = db.Column(db.Integer, default=0)      # 总翻译次数
+    last_translate_date = db.Column(db.Date, nullable=True)  # 最后翻译日期
+    
+    # 时间戳
+    created_at = db.Column(db.DateTime, default=datetime.utcnow)
+    updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+    
+    # 状态
+    is_active = db.Column(db.Boolean, default=True)     # 是否启用
+    is_admin = db.Column(db.Boolean, default=False)     # 是否管理员
+    
+    # 关系
+    translations = db.relationship('Translation', backref='user', lazy=True)
+    
+    def set_password(self, password):
+        self.password_hash = generate_password_hash(password)
+    
+    def check_password(self, password):
+        return check_password_hash(self.password_hash, password)
+    
+    def is_vip(self):
+        """检查是否为付费会员"""
+        if self.user_type.startswith('vip'):
+            if self.membership_expire and self.membership_expire > datetime.utcnow():
+                return True
+            # 过期则降级为免费用户
+            self.user_type = 'free'
+            self.membership_expire = None
+            db.session.commit()
+        return False
+    
+    def can_translate(self, pages, config):
+        """检查是否可以翻译（次数、页数限制）"""
+        limits = config['USER_LIMITS'].get(self.user_type, config['USER_LIMITS']['free'])
+        
+        # 检查页数限制
+        max_pages = limits['max_pages']
+        if max_pages > 0 and pages > max_pages:
+            return False, f"PDF页数超出限制（最大{max_pages}页）"
+        
+        # 检查每日次数限制
+        today = datetime.utcnow().date()
+        if self.last_translate_date != today:
+            self.daily_count = 0
+            self.last_translate_date = today
+        
+        daily_limit = limits['daily_translations']
+        if daily_limit > 0 and self.daily_count >= daily_limit:
+            return False, f"今日翻译次数已达上限（{daily_limit}次）"
+        
+        return True, "OK"
+    
+    def increment_count(self):
+        """增加翻译计数"""
+        today = datetime.utcnow().date()
+        if self.last_translate_date != today:
+            self.daily_count = 0
+            self.last_translate_date = today
+        self.daily_count += 1
+        self.total_count += 1
+        db.session.commit()
+    
+    def to_dict(self):
+        return {
+            'id': self.id,
+            'username': self.username,
+            'email': self.email,
+            'user_type': self.user_type,
+            'is_vip': self.is_vip(),
+            'is_admin': self.is_admin,
+            'is_active': self.is_active,
+            'daily_count': self.daily_count,
+            'total_count': self.total_count,
+            'created_at': self.created_at.isoformat() if self.created_at else None,
+            'membership_expire': self.membership_expire.isoformat() if self.membership_expire else None,
+        }
+
+
+# ==================== 翻译记录模型 ====================
+class Translation(db.Model):
+    """翻译记录表"""
+    __tablename__ = 'translations'
+    
+    id = db.Column(db.Integer, primary_key=True)
+    
+    # 用户关联
+    user_id = db.Column(db.Integer, db.ForeignKey('users.id'), nullable=True)  # guest可为null
+    
+    # 文件信息
+    file_hash = db.Column(db.String(64), nullable=False)  # 文件MD5哈希
+    original_filename = db.Column(db.String(255), nullable=False)
+    file_size = db.Column(db.Integer, nullable=False)
+    page_count = db.Column(db.Integer, nullable=False)
+    
+    # 翻译信息
+    source_language = db.Column(db.String(10), default='en')
+    target_language = db.Column(db.String(10), default='zh')
+    translate_params = db.Column(db.Text, nullable=True)  # JSON格式的翻译参数
+    
+    # 状态
+    status = db.Column(db.String(20), default='pending')  # pending, processing, completed, failed
+    progress = db.Column(db.Integer, default=0)           # 翻译进度 0-100
+    error_message = db.Column(db.Text, nullable=True)
+    
+    # 输出
+    output_path = db.Column(db.String(255), nullable=True)  # 翻译结果文件路径
+    
+    # 时间戳
+    created_at = db.Column(db.DateTime, default=datetime.utcnow)
+    completed_at = db.Column(db.DateTime, nullable=True)
+    
+    # 是否来自缓存
+    from_cache = db.Column(db.Boolean, default=False)
+    
+    # 重译信息
+    retranslate_request = db.Column(db.Text, nullable=True)  # 重译要求
+    parent_id = db.Column(db.Integer, db.ForeignKey('translations.id'), nullable=True)  # 原翻译ID
+    
+    def to_dict(self):
+        return {
+            'id': self.id,
+            'filename': self.original_filename,
+            'pages': self.page_count,
+            'status': self.status,
+            'progress': self.progress,
+            'from_cache': self.from_cache,
+            'file_size': self.file_size,
+            'created_at': self.created_at.isoformat() if self.created_at else None,
+            'completed_at': self.completed_at.isoformat() if self.completed_at else None,
+            'user_id': self.user_id,
+        }
+
+
+# ==================== 翻译缓存模型 ====================
+class TranslationCache(db.Model):
+    """翻译缓存表"""
+    __tablename__ = 'translation_cache'
+    
+    id = db.Column(db.Integer, primary_key=True)
+    
+    # 文件哈希
+    file_hash = db.Column(db.String(64), unique=True, nullable=False)
+    
+    # 缓存信息
+    cache_path = db.Column(db.String(255), nullable=False)  # 缓存文件路径
+    page_count = db.Column(db.Integer, nullable=False)
+    file_size = db.Column(db.Integer, default=0)
+    
+    # 统计
+    hit_count = db.Column(db.Integer, default=0)  # 缓存命中次数
+    
+    # 时间戳
+    created_at = db.Column(db.DateTime, default=datetime.utcnow)
+    expires_at = db.Column(db.DateTime, nullable=True)
+    
+    def increment_hit(self):
+        self.hit_count += 1
+        db.session.commit()
+    
+    @staticmethod
+    def compute_hash(file_content):
+        """计算文件哈希"""
+        return hashlib.md5(file_content).hexdigest()
+
+
+# ==================== 访客翻译记录 ====================
+class GuestTranslation(db.Model):
+    """访客翻译记录（基于IP或Session）"""
+    __tablename__ = 'guest_translations'
+    
+    id = db.Column(db.Integer, primary_key=True)
+    
+    # 访客标识
+    session_id = db.Column(db.String(64), nullable=False)  # Session ID
+    ip_address = db.Column(db.String(45), nullable=True)
+    
+    # 统计
+    daily_count = db.Column(db.Integer, default=0)
+    total_count = db.Column(db.Integer, default=0)
+    last_translate_date = db.Column(db.Date, nullable=True)
+    
+    created_at = db.Column(db.DateTime, default=datetime.utcnow)
+
+
+# ==================== 系统配置模型 ====================
+class SystemConfig(db.Model):
+    """系统配置表"""
+    __tablename__ = 'system_config'
+    
+    id = db.Column(db.Integer, primary_key=True)
+    key = db.Column(db.String(100), unique=True, nullable=False)
+    value = db.Column(db.Text, nullable=True)
+    description = db.Column(db.String(255), nullable=True)
+    updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+    
+    @staticmethod
+    def get(key, default=None):
+        config = SystemConfig.query.filter_by(key=key).first()
+        return config.value if config else default
+    
+    @staticmethod
+    def set(key, value, description=None):
+        config = SystemConfig.query.filter_by(key=key).first()
+        if config:
+            config.value = value
+        else:
+            config = SystemConfig(key=key, value=value, description=description)
+            db.session.add(config)
+        db.session.commit()
+
+
+# ==================== 操作日志模型 ====================
+class OperationLog(db.Model):
+    """操作日志表"""
+    __tablename__ = 'operation_logs'
+    
+    id = db.Column(db.Integer, primary_key=True)
+    
+    # 操作者
+    user_id = db.Column(db.Integer, db.ForeignKey('users.id'), nullable=True)
+    username = db.Column(db.String(80), nullable=True)
+    
+    # 操作信息
+    action = db.Column(db.String(50), nullable=False)  # login, translate, register, etc.
+    target = db.Column(db.String(100), nullable=True)  # 操作对象
+    detail = db.Column(db.Text, nullable=True)         # 详细信息(JSON)
+    
+    # IP地址
+    ip_address = db.Column(db.String(45), nullable=True)
+    
+    # 时间
+    created_at = db.Column(db.DateTime, default=datetime.utcnow)
+    
+    def to_dict(self):
+        return {
+            'id': self.id,
+            'username': self.username,
+            'action': self.action,
+            'target': self.target,
+            'ip_address': self.ip_address,
+            'created_at': self.created_at.isoformat() if self.created_at else None,
+        }
+
+
+# ==================== 数据包套餐模型 ====================
+class DataPackage(db.Model):
+    """数据包购买套餐"""
+    __tablename__ = 'data_packages'
+    
+    id = db.Column(db.Integer, primary_key=True)
+    name = db.Column(db.String(100), nullable=False)           # 套餐名称
+    description = db.Column(db.String(255), nullable=True)     # 描述
+    
+    # 翻译次数
+    translation_count = db.Column(db.Integer, default=0)       # 翻译次数（-1表示无限）
+    
+    # 价格
+    price = db.Column(db.Float, default=0)                     # 价格
+    original_price = db.Column(db.Float, nullable=True)        # 原价（用于显示折扣）
+    
+    # 有效期
+    valid_days = db.Column(db.Integer, default=30)             # 有效天数（0表示永久）
+    
+    # 排序和状态
+    sort_order = db.Column(db.Integer, default=0)              # 排序
+    is_active = db.Column(db.Boolean, default=True)            # 是否上架
+    is_recommended = db.Column(db.Boolean, default=False)      # 是否推荐
+    
+    # 时间
+    created_at = db.Column(db.DateTime, default=datetime.utcnow)
+    updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+    
+    def to_dict(self):
+        return {
+            'id': self.id,
+            'name': self.name,
+            'description': self.description,
+            'translation_count': self.translation_count,
+            'price': self.price,
+            'original_price': self.original_price,
+            'valid_days': self.valid_days,
+            'is_active': self.is_active,
+            'is_recommended': self.is_recommended,
+        }
+
+
+# ==================== 用户数据包购买记录 ====================
+class UserPackage(db.Model):
+    """用户购买的数据包"""
+    __tablename__ = 'user_packages'
+    
+    id = db.Column(db.Integer, primary_key=True)
+    user_id = db.Column(db.Integer, db.ForeignKey('users.id'), nullable=False)
+    package_id = db.Column(db.Integer, db.ForeignKey('data_packages.id'), nullable=False)
+    
+    # 套餐信息快照
+    package_name = db.Column(db.String(100), nullable=False)
+    translation_count = db.Column(db.Integer, default=0)       # 总次数
+    remaining_count = db.Column(db.Integer, default=0)         # 剩余次数
+    
+    # 有效期
+    expire_at = db.Column(db.DateTime, nullable=True)          # 过期时间（None表示永久）
+    
+    # 购买信息
+    price_paid = db.Column(db.Float, default=0)                # 实付金额
+    payment_method = db.Column(db.String(20), nullable=True)   # 支付方式
+    payment_status = db.Column(db.String(20), default='pending')  # pending, paid, refunded
+    
+    # 时间
+    purchased_at = db.Column(db.DateTime, default=datetime.utcnow)
+    
+    # 关系
+    user = db.relationship('User', backref=db.backref('packages', lazy=True))
+    package = db.relationship('DataPackage', backref=db.backref('purchases', lazy=True))
+    
+    def is_valid(self):
+        """检查数据包是否有效"""
+        if self.remaining_count <= 0:
+            return False
+        if self.expire_at and self.expire_at < datetime.utcnow():
+            return False
+        return True
+
+
+# ==================== 系统配置（动态） ====================
+class DynamicConfig(db.Model):
+    """动态系统配置（可在页面修改）"""
+    __tablename__ = 'dynamic_config'
+    
+    id = db.Column(db.Integer, primary_key=True)
+    category = db.Column(db.String(50), default='general')      # 分类: general, user_limits, membership
+    key = db.Column(db.String(100), unique=True, nullable=False)
+    value = db.Column(db.Text, nullable=True)
+    value_type = db.Column(db.String(20), default='string')    # string, int, float, bool, json
+    description = db.Column(db.String(255), nullable=True)
+    
+    updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+    updated_by = db.Column(db.Integer, db.ForeignKey('users.id'), nullable=True)
+    
+    @staticmethod
+    def get(key, default=None):
+        config = DynamicConfig.query.filter_by(key=key).first()
+        if not config:
+            return default
+        
+        # 类型转换
+        if config.value_type == 'int':
+            return int(config.value) if config.value else 0
+        elif config.value_type == 'float':
+            return float(config.value) if config.value else 0.0
+        elif config.value_type == 'bool':
+            return config.value.lower() in ('true', '1', 'yes')
+        elif config.value_type == 'json':
+            import json
+            return json.loads(config.value) if config.value else {}
+        return config.value
+    
+    @staticmethod
+    def set(key, value, category='general', value_type='string', description=None, user_id=None):
+        config = DynamicConfig.query.filter_by(key=key).first()
+        
+        # 类型转换
+        if value_type == 'json':
+            import json
+            value = json.dumps(value, ensure_ascii=False)
+        elif value_type == 'bool':
+            value = 'true' if value else 'false'
+        else:
+            value = str(value) if value is not None else None
+        
+        if config:
+            config.value = value
+            config.value_type = value_type
+            config.updated_by = user_id
+        else:
+            config = DynamicConfig(
+                category=category,
+                key=key,
+                value=value,
+                value_type=value_type,
+                description=description,
+                updated_by=user_id
+            )
+            db.session.add(config)
+        
+        db.session.commit()
+        return config
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..9ee439a
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,6 @@
+flask>=2.3.0
+flask-sqlalchemy>=3.0.0
+werkzeug>=2.3.0
+pypdf>=6.0.0
+openai>=2.0.0
+python-dotenv>=1.0.0
\ No newline at end of file
diff --git a/services.py b/services.py
new file mode 100644
index 0000000..cb2af14
--- /dev/null
+++ b/services.py
@@ -0,0 +1,316 @@
+"""
+PDF翻译服务模块
+"""
+
+import os
+import json
+import time
+import hashlib
+import threading
+from datetime import datetime, timedelta
+from pypdf import PdfReader
+from openai import OpenAI
+from flask import current_app
+
+# ==================== LLM客户端 ====================
+class TranslationService:
+    """翻译服务"""
+    
+    def __init__(self, config):
+        self.config = config
+        self.llm_config = config['LLM_CONFIG']
+        self.client = OpenAI(
+            api_key=self.llm_config['api_key'],
+            base_url=self.llm_config['api_base'],
+        )
+    
+    def translate_text(self, text, instruction=None):
+        """
+        翻译文本
+        
+        Args:
+            text: 待翻译文本
+            instruction: 用户自定义翻译要求
+        
+        Returns:
+            翻译后的文本
+        """
+        system_prompt = """你是一个专业的英译中翻译专家。请遵循以下规则：
+1. 保持原文的格式和段落结构
+2. 专业术语保持准确性，必要时保留英文原文
+3. 语言流畅自然，符合中文表达习惯
+4. 不要添加任何解释或注释，只输出翻译结果"""
+        
+        user_prompt = f"""请将以下英文翻译成中文。直接输出中文翻译，不要解释。
+
+英文内容：
+{text}"""
+        
+        if instruction:
+            user_prompt = f"""请将以下英文翻译成中文。
+用户翻译要求：{instruction}
+
+英文内容：
+{text}"""
+        
+        try:
+            response = self.client.chat.completions.create(
+                model=self.llm_config['model'],
+                messages=[
+                    {"role": "system", "content": system_prompt},
+                    {"role": "user", "content": user_prompt}
+                ],
+                max_tokens=self.llm_config['max_tokens'],
+                temperature=0.3,
+                timeout=self.llm_config['timeout'],
+            )
+            
+            content = response.choices[0].message.content
+            if content and content.strip():
+                return content.strip()
+            return text
+        
+        except Exception as e:
+            print(f"翻译错误: {e}")
+            return text
+    
+    def extract_pdf_text(self, pdf_path):
+        """提取PDF文本"""
+        reader = PdfReader(pdf_path)
+        pages = []
+        
+        for i, page in enumerate(reader.pages):
+            text = page.extract_text()
+            if text.strip():
+                # 清理文本
+                text = self._clean_text(text)
+                pages.append({
+                    'page': i + 1,
+                    'text': text
+                })
+        
+        return pages
+    
+    def _clean_text(self, text):
+        """清理文本"""
+        import re
+        text = re.sub(r'\n{3,}', '\n\n', text)
+        text = re.sub(r' {2,}', ' ', text)
+        text = re.sub(r'[\x00-\x08\x0b\x0c\x0e-\x1f]', '', text)
+        return text.strip()
+    
+    def chunk_text(self, text, max_size=2000):
+        """分块"""
+        paragraphs = text.split('\n\n')
+        chunks = []
+        current = ""
+        
+        for para in paragraphs:
+            if len(current) + len(para) < max_size:
+                current += para + '\n\n'
+            else:
+                if current:
+                    chunks.append(current.strip())
+                current = para + '\n\n'
+        
+        if current:
+            chunks.append(current.strip())
+        
+        return chunks
+    
+    def translate_pdf(self, pdf_path, output_path, instruction=None, progress_callback=None):
+        """
+        翻译PDF
+        
+        Args:
+            pdf_path: 输入PDF路径
+            output_path: 输出路径
+            instruction: 用户翻译要求
+            progress_callback: 进度回调函数
+        
+        Returns:
+            翻译统计信息
+        """
+        pages = self.extract_pdf_text(pdf_path)
+        total_pages = len(pages)
+        
+        if progress_callback:
+            progress_callback(0, total_pages, "开始翻译...")
+        
+        translated_pages = []
+        total_chunks = 0
+        
+        for page_data in pages:
+            chunks = self.chunk_text(page_data['text'], self.llm_config['chunk_size'])
+            total_chunks += len(chunks)
+            
+            translated_chunks = []
+            for i, chunk in enumerate(chunks):
+                translated = self.translate_text(chunk, instruction)
+                translated_chunks.append(translated)
+                
+                if progress_callback:
+                    progress = int((i + 1) / len(chunks) * 100 / total_pages)
+                    progress_callback(progress, total_pages, f"翻译第{page_data['page']}页")
+            
+            translated_pages.append({
+                'page': page_data['page'],
+                'original': page_data['text'],
+                'translated': '\n\n'.join(translated_chunks)
+            })
+        
+        # 保存结果
+        self._save_output(translated_pages, output_path)
+        
+        if progress_callback:
+            progress_callback(100, total_pages, "翻译完成")
+        
+        return {
+            'total_pages': total_pages,
+            'total_chunks': total_chunks,
+            'output_path': output_path
+        }
+    
+    def _save_output(self, pages, output_path):
+        """保存翻译结果"""
+        content = "# 英文PDF中文翻译\n\n> 自动翻译生成\n\n---\n\n"
+        for page in pages:
+            content += f"## 第 {page['page']} 页\n\n"
+            content += page['translated'] + "\n\n---\n\n"
+        
+        with open(output_path, 'w', encoding='utf-8') as f:
+            f.write(content)
+    
+    def save_comparison(self, pages, output_path):
+        """保存对比文件（原文+译文）"""
+        content = "# 英文PDF翻译对比\n\n---\n\n"
+        for page in pages:
+            content += f"## 第 {page['page']} 页\n\n"
+            content += "### 原文\n\n```\n" + page['original'] + "\n```\n\n"
+            content += "### 译文\n\n" + page['translated'] + "\n\n---\n\n"
+        
+        with open(output_path, 'w', encoding='utf-8') as f:
+            f.write(content)
+
+
+# ==================== 缓存服务 ====================
+class CacheService:
+    """翻译缓存服务"""
+    
+    def __init__(self, cache_dir, expire_days=30):
+        self.cache_dir = cache_dir
+        self.expire_days = expire_days
+        
+        if not os.path.exists(cache_dir):
+            os.makedirs(cache_dir)
+    
+    def compute_hash(self, file_content):
+        """计算文件哈希"""
+        return hashlib.md5(file_content).hexdigest()
+    
+    def get_cache(self, file_hash, db_model=None):
+        """
+        获取缓存
+        
+        Returns:
+            缓存路径或None
+        """
+        cache_file = os.path.join(self.cache_dir, f"{file_hash}.md")
+        
+        if os.path.exists(cache_file):
+            # 检查过期
+            file_time = datetime.fromtimestamp(os.path.getmtime(cache_file))
+            if datetime.now() - file_time > timedelta(days=self.expire_days):
+                os.remove(cache_file)
+                return None
+            
+            # 更新命中计数
+            if db_model:
+                cache_record = db_model.query.filter_by(file_hash=file_hash).first()
+                if cache_record:
+                    cache_record.increment_hit()
+            
+            return cache_file
+        
+        return None
+    
+    def save_cache(self, file_hash, content):
+        """保存缓存"""
+        cache_file = os.path.join(self.cache_dir, f"{file_hash}.md")
+        with open(cache_file, 'w', encoding='utf-8') as f:
+            f.write(content)
+        return cache_file
+    
+    def check_cache_exists(self, file_hash):
+        """检查缓存是否存在"""
+        cache_file = os.path.join(self.cache_dir, f"{file_hash}.md")
+        return os.path.exists(cache_file)
+
+
+# ==================== 异步翻译任务 ====================
+class TranslationTask:
+    """异步翻译任务"""
+    
+    tasks = {}  # 任务存储
+    lock = threading.Lock()
+    
+    @classmethod
+    def create_task(cls, task_id, pdf_path, output_path, config, instruction=None):
+        """创建翻译任务"""
+        task = {
+            'id': task_id,
+            'status': 'pending',
+            'progress': 0,
+            'message': '等待开始',
+            'output_path': output_path,
+            'error': None,
+            'started_at': None,
+            'completed_at': None,
+        }
+        
+        with cls.lock:
+            cls.tasks[task_id] = task
+        
+        # 启动翻译线程
+        def run_translation():
+            service = TranslationService(config)
+            task['status'] = 'processing'
+            task['started_at'] = datetime.now().isoformat()
+            
+            def progress_callback(progress, total, message):
+                with cls.lock:
+                    task['progress'] = progress
+                    task['message'] = message
+            
+            try:
+                result = service.translate_pdf(
+                    pdf_path, output_path, instruction, progress_callback
+                )
+                task['status'] = 'completed'
+                task['progress'] = 100
+                task['message'] = '翻译完成'
+                task['completed_at'] = datetime.now().isoformat()
+                task['result'] = result
+            
+            except Exception as e:
+                task['status'] = 'failed'
+                task['error'] = str(e)
+                task['message'] = f'翻译失败: {e}'
+        
+        thread = threading.Thread(target=run_translation)
+        thread.start()
+        
+        return task_id
+    
+    @classmethod
+    def get_task(cls, task_id):
+        """获取任务状态"""
+        with cls.lock:
+            return cls.tasks.get(task_id)
+    
+    @classmethod
+    def update_task(cls, task_id, **kwargs):
+        """更新任务"""
+        with cls.lock:
+            if task_id in cls.tasks:
+                cls.tasks[task_id].update(kwargs)
\ No newline at end of file
diff --git a/static/css/style.css b/static/css/style.css
new file mode 100644
index 0000000..99917cc
--- /dev/null
+++ b/static/css/style.css
@@ -0,0 +1,176 @@
+/* PDF翻译助手样式 */
+
+:root {
+    --primary-color: #4a90d9;
+    --secondary-color: #f8f9fa;
+    --success-color: #28a745;
+    --warning-color: #ffc107;
+}
+
+body {
+    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
+    background-color: var(--secondary-color);
+}
+
+.navbar-brand {
+    font-weight: bold;
+}
+
+/* 卡片样式 */
+.card {
+    border-radius: 10px;
+    border: none;
+    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
+}
+
+.card-header {
+    border-radius: 10px 10px 0 0 !important;
+}
+
+/* 上传区域 */
+#uploadForm {
+    padding: 20px;
+}
+
+.form-control:focus {
+    border-color: var(--primary-color);
+    box-shadow: 0 0 0 0.2rem rgba(74, 144, 217, 0.25);
+}
+
+/* 进度条 */
+.progress {
+    height: 25px;
+    border-radius: 5px;
+}
+
+.progress-bar {
+    background-color: var(--primary-color);
+    transition: width 0.3s ease;
+}
+
+/* 翻译内容 */
+.translation-content {
+    max-height: 600px;
+    overflow-y: auto;
+    padding: 20px;
+    background-color: #fff;
+    border-radius: 5px;
+    border: 1px solid #dee2e6;
+    line-height: 1.8;
+}
+
+.translation-content h2 {
+    color: var(--primary-color);
+    margin-top: 20px;
+    border-bottom: 2px solid var(--primary-color);
+    padding-bottom: 10px;
+}
+
+.translation-content hr {
+    margin: 30px 0;
+}
+
+/* 对比视图 */
+.compare-container {
+    display: grid;
+    grid-template-columns: 1fr 1fr;
+    gap: 20px;
+}
+
+.compare-panel {
+    padding: 15px;
+    border-radius: 5px;
+    background-color: #f8f9fa;
+}
+
+.compare-panel.original {
+    border-left: 4px solid #dc3545;
+}
+
+.compare-panel.translated {
+    border-left: 4px solid var(--success-color);
+}
+
+/* 会员卡片 */
+.pricing-card {
+    transition: transform 0.3s ease;
+}
+
+.pricing-card:hover {
+    transform: translateY(-5px);
+}
+
+.pricing-card .price {
+    font-size: 2.5rem;
+    font-weight: bold;
+    color: var(--primary-color);
+}
+
+.pricing-card .features {
+    list-style: none;
+    padding: 0;
+}
+
+.pricing-card .features li {
+    padding: 10px 0;
+    border-bottom: 1px solid #eee;
+}
+
+/* 按钮 */
+.btn-primary {
+    background-color: var(--primary-color);
+    border-color: var(--primary-color);
+}
+
+.btn-primary:hover {
+    background-color: #3a7bc8;
+    border-color: #3a7bc8;
+}
+
+/* 响应式 */
+@media (max-width: 768px) {
+    .compare-container {
+        grid-template-columns: 1fr;
+    }
+    
+    .translation-content {
+        max-height: 400px;
+    }
+}
+
+/* 加载动画 */
+.loading-overlay {
+    position: fixed;
+    top: 0;
+    left: 0;
+    right: 0;
+    bottom: 0;
+    background: rgba(255, 255, 255, 0.8);
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    z-index: 9999;
+}
+
+/* 历史记录 */
+.history-item {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    padding: 15px;
+    border-bottom: 1px solid #eee;
+}
+
+.history-item:hover {
+    background-color: #f8f9fa;
+}
+
+/* 登录注册表单 */
+.auth-form {
+    max-width: 400px;
+    margin: 50px auto;
+    padding: 30px;
+    background: white;
+    border-radius: 10px;
+    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
+}
\ No newline at end of file
diff --git a/static/js/main.js b/static/js/main.js
new file mode 100644
index 0000000..fb0ccb0
--- /dev/null
+++ b/static/js/main.js
@@ -0,0 +1,286 @@
+/**
+ * PDF翻译助手前端脚本
+ */
+
+// 当前翻译ID
+let currentTranslationId = null;
+let currentTaskId = null;
+
+// 上传表单处理
+document.getElementById('uploadForm').addEventListener('submit', async function(e) {
+    e.preventDefault();
+    
+    const fileInput = document.getElementById('pdfFile');
+    const file = fileInput.files[0];
+    
+    if (!file) {
+        alert('请选择PDF文件');
+        return;
+    }
+    
+    if (!file.name.toLowerCase().endsWith('.pdf')) {
+        alert('只支持PDF文件');
+        return;
+    }
+    
+    // 显示进度区域
+    document.getElementById('progressSection').style.display = 'block';
+    document.getElementById('resultSection').style.display = 'none';
+    document.getElementById('cacheNotice').style.display = 'none';
+    
+    // 显示加载状态
+    const submitBtn = document.getElementById('submitBtn');
+    const btnText = document.getElementById('btnText');
+    const btnSpinner = document.getElementById('btnSpinner');
+    
+    submitBtn.disabled = true;
+    btnText.textContent = '上传中...';
+    btnSpinner.style.display = 'inline-block';
+    
+    // 构建表单数据
+    const formData = new FormData();
+    formData.append('file', file);
+    
+    const instruction = document.getElementById('instruction')?.value;
+    if (instruction) {
+        formData.append('instruction', instruction);
+    }
+    
+    try {
+        // 上传文件
+        const response = await fetch('/api/upload', {
+            method: 'POST',
+            body: formData
+        });
+        
+        const result = await response.json();
+        
+        if (!response.ok) {
+            throw new Error(result.error || '上传失败');
+        }
+        
+        currentTranslationId = result.translation_id;
+        currentTaskId = result.task_id;
+        
+        // 如果使用缓存，直接显示结果
+        if (result.from_cache) {
+            document.getElementById('cacheNotice').style.display = 'block';
+            showResult(currentTranslationId);
+        } else {
+            // 开始轮询进度
+            pollProgress(currentTaskId, currentTranslationId);
+        }
+        
+    } catch (error) {
+        alert('上传失败: ' + error.message);
+        resetUploadButton();
+    }
+});
+
+// 轮询翻译进度
+async function pollProgress(taskId, translationId) {
+    const progressBar = document.getElementById('progressBar');
+    const progressMessage = document.getElementById('progressMessage');
+    
+    const poll = async () => {
+        try {
+            // 同时检查任务状态和翻译状态
+            const taskResponse = await fetch(`/api/task/${taskId}`);
+            const taskResult = await taskResponse.json();
+            
+            const transResponse = await fetch(`/api/status/${translationId}`);
+            const transResult = await transResponse.json();
+            
+            // 更新进度
+            if (taskResult.progress) {
+                progressBar.style.width = taskResult.progress + '%';
+                progressBar.textContent = taskResult.progress + '%';
+            }
+            
+            if (taskResult.message) {
+                progressMessage.textContent = taskResult.message;
+            }
+            
+            // 检查是否完成
+            if (taskResult.status === 'completed' || transResult.status === 'completed') {
+                progressBar.style.width = '100%';
+                progressBar.textContent = '100%';
+                progressMessage.textContent = '翻译完成！';
+                
+                // 显示结果
+                setTimeout(() => showResult(translationId), 500);
+                return;
+            }
+            
+            if (taskResult.status === 'failed') {
+                progressMessage.textContent = '翻译失败: ' + (taskResult.error || '未知错误');
+                resetUploadButton();
+                return;
+            }
+            
+            // 继续轮询
+            setTimeout(poll, 2000);
+            
+        } catch (error) {
+            console.error('轮询失败:', error);
+            setTimeout(poll, 3000);
+        }
+    };
+    
+    poll();
+}
+
+// 显示翻译结果
+async function showResult(translationId) {
+    const resultSection = document.getElementById('resultSection');
+    const resultContent = document.getElementById('resultContent');
+    
+    try {
+        const response = await fetch(`/api/result/${translationId}`);
+        const result = await response.json();
+        
+        if (!response.ok) {
+            throw new Error(result.error || '获取结果失败');
+        }
+        
+        // 渲染Markdown内容
+        resultContent.innerHTML = renderMarkdown(result.content);
+        resultSection.style.display = 'block';
+        
+        resetUploadButton();
+        
+    } catch (error) {
+        alert('获取结果失败: ' + error.message);
+        resetUploadButton();
+    }
+}
+
+// 重置上传按钮
+function resetUploadButton() {
+    const submitBtn = document.getElementById('submitBtn');
+    const btnText = document.getElementById('btnText');
+    const btnSpinner = document.getElementById('btnSpinner');
+    
+    submitBtn.disabled = false;
+    btnText.textContent = '开始翻译';
+    btnSpinner.style.display = 'none';
+}
+
+// 下载结果
+document.getElementById('downloadBtn')?.addEventListener('click', function() {
+    if (currentTranslationId) {
+        window.location.href = `/api/download/${currentTranslationId}`;
+    }
+});
+
+// 对比查看
+document.getElementById('viewCompare')?.addEventListener('click', async function() {
+    if (!currentTranslationId) return;
+    
+    try {
+        const response = await fetch(`/api/compare/${currentTranslationId}`);
+        const result = await response.json();
+        
+        // 显示对比视图
+        showCompareView(result);
+        
+    } catch (error) {
+        alert('获取对比失败: ' + error.message);
+    }
+});
+
+// 显示对比视图
+function showCompareView(data) {
+    const resultContent = document.getElementById('resultContent');
+    
+    resultContent.innerHTML = `
+        <div class="compare-container">
+            <div class="compare-panel original">
+                <h5>原文</h5>
+                <div class="content">${escapeHtml(data.original)}</div>
+            </div>
+            <div class="compare-panel translated">
+                <h5>译文</h5>
+                <div class="content">${renderMarkdown(data.translated)}</div>
+            </div>
+        </div>
+    `;
+}
+
+// 重新翻译
+document.getElementById('retranslateBtn')?.addEventListener('click', async function() {
+    if (!currentTranslationId) return;
+    
+    const instruction = document.getElementById('retranslateInstruction').value;
+    if (!instruction.trim()) {
+        alert('请输入翻译要求');
+        return;
+    }
+    
+    try {
+        const response = await fetch(`/api/retranslate/${currentTranslationId}`, {
+            method: 'POST',
+            headers: {'Content-Type': 'application/json'},
+            body: JSON.stringify({instruction: instruction})
+        });
+        
+        const result = await response.json();
+        
+        if (!response.ok) {
+            throw new Error(result.error || '重译请求失败');
+        }
+        
+        // 开始新的翻译任务
+        currentTranslationId = result.translation_id;
+        document.getElementById('progressSection').style.display = 'block';
+        document.getElementById('resultSection').style.display = 'none';
+        pollProgress(null, currentTranslationId);
+        
+    } catch (error) {
+        alert('重译失败: ' + error.message);
+    }
+});
+
+// 简单Markdown渲染
+function renderMarkdown(text) {
+    // 标题
+    text = text.replace(/^## (.*)$/gm, '<h2>$1</h2>');
+    text = text.replace(/^# (.*)$/gm, '<h1>$1</h1>');
+    
+    // 分隔线
+    text = text.replace(/^---$/gm, '<hr>');
+    
+    // 引用
+    text = text.replace(/^> (.*)$/gm, '<blockquote>$1</blockquote>');
+    
+    // 段落
+    text = text.replace(/\n\n/g, '</p><p>');
+    text = '<p>' + text + '</p>';
+    
+    return text;
+}
+
+// HTML转义
+function escapeHtml(text) {
+    const div = document.createElement('div');
+    div.textContent = text;
+    return div.innerHTML;
+}
+
+// 检查用户登录状态
+async function checkUserStatus() {
+    try {
+        const response = await fetch('/api/user/info');
+        const result = await response.json();
+        
+        if (result.user) {
+            console.log('用户已登录:', result.user.username);
+        }
+        
+    } catch (error) {
+        console.error('检查用户状态失败:', error);
+    }
+}
+
+// 页面加载时检查状态
+document.addEventListener('DOMContentLoaded', checkUserStatus);
\ No newline at end of file
diff --git a/templates/admin/cache.html b/templates/admin/cache.html
new file mode 100644
index 0000000..f29363a
--- /dev/null
+++ b/templates/admin/cache.html
@@ -0,0 +1,140 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <title>缓存管理 - 后台管理</title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.0/font/bootstrap-icons.css" rel="stylesheet">
+    <style>
+        body { background-color: #f5f5f5; }
+        .sidebar { position: fixed; top: 0; left: 0; height: 100vh; width: 250px; background: #343a40; padding-top: 60px; }
+        .sidebar .nav-link { color: #adb5bd; padding: 12px 20px; }
+        .sidebar .nav-link:hover, .sidebar .nav-link.active { color: #fff; background: rgba(255,255,255,0.1); }
+        .main-content { margin-left: 250px; padding: 20px; }
+    </style>
+</head>
+<body>
+    <nav class="sidebar">
+        <div class="position-absolute top-0 w-100 p-3 border-bottom border-secondary">
+            <h5 class="text-white mb-0"><i class="bi bi-gear-fill"></i> 后台管理</h5>
+        </div>
+        <ul class="nav flex-column">
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.dashboard') }}"><i class="bi bi-speedometer2"></i> 数据概览</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.users') }}"><i class="bi bi-people"></i> 用户管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.translations') }}"><i class="bi bi-file-text"></i> 翻译记录</a></li>
+            <li class="nav-item"><a class="nav-link active" href="{{ url_for('admin.cache_list') }}"><i class="bi bi-database"></i> 缓存管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.stats') }}"><i class="bi bi-bar-chart"></i> 统计报表</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.logs') }}"><i class="bi bi-list-check"></i> 操作日志</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.settings') }}"><i class="bi bi-sliders"></i> 系统配置</a></li>
+        </ul>
+        <div class="position-absolute bottom-0 w-100 p-3 border-top border-secondary">
+            <a href="/" class="btn btn-outline-light btn-sm w-100"><i class="bi bi-house"></i> 返回前台</a>
+        </div>
+    </nav>
+
+    <main class="main-content">
+        <!-- 统计卡片 -->
+        <div class="row mb-4">
+            <div class="col-md-4">
+                <div class="card">
+                    <div class="card-body text-center">
+                        <h6 class="text-muted">缓存总数</h6>
+                        <h2>{{ caches.total }}</h2>
+                    </div>
+                </div>
+            </div>
+            <div class="col-md-4">
+                <div class="card">
+                    <div class="card-body text-center">
+                        <h6 class="text-muted">缓存大小</h6>
+                        <h2>{{ (total_size / 1024 / 1024)|round(2) }} MB</h2>
+                    </div>
+                </div>
+            </div>
+            <div class="col-md-4">
+                <div class="card">
+                    <div class="card-body text-center">
+                        <h6 class="text-muted">总命中次数</h6>
+                        <h2>{{ total_hits }}</h2>
+                    </div>
+                </div>
+            </div>
+        </div>
+
+        <div class="card">
+            <div class="card-header d-flex justify-content-between">
+                <h5 class="mb-0"><i class="bi bi-database"></i> 缓存列表</h5>
+                <button class="btn btn-danger btn-sm" onclick="clearCache()">
+                    <i class="bi bi-trash"></i> 清空缓存
+                </button>
+            </div>
+            <div class="card-body p-0">
+                <table class="table table-hover mb-0">
+                    <thead class="table-light">
+                        <tr>
+                            <th>文件哈希</th>
+                            <th>页数</th>
+                            <th>大小</th>
+                            <th>命中次数</th>
+                            <th>创建时间</th>
+                            <th>操作</th>
+                        </tr>
+                    </thead>
+                    <tbody>
+                        {% for c in caches.items %}
+                        <tr>
+                            <td><code>{{ c.file_hash[:16] }}...</code></td>
+                            <td>{{ c.page_count }}</td>
+                            <td>{{ (c.file_size / 1024)|round(1) }}KB</td>
+                            <td><span class="badge bg-info">{{ c.hit_count }}</span></td>
+                            <td>{{ c.created_at.strftime('%m-%d %H:%M') }}</td>
+                            <td>
+                                <button class="btn btn-sm btn-outline-danger" onclick="deleteCache({{ c.id }})">
+                                    <i class="bi bi-trash"></i>
+                                </button>
+                            </td>
+                        </tr>
+                        {% else %}
+                        <tr><td colspan="6" class="text-center text-muted py-4">暂无缓存</td></tr>
+                        {% endfor %}
+                    </tbody>
+                </table>
+            </div>
+            <div class="card-footer">
+                <nav>
+                    <ul class="pagination mb-0">
+                        {% if caches.has_prev %}
+                        <li class="page-item"><a class="page-link" href="?page={{ caches.prev_num }}">上一页</a></li>
+                        {% endif %}
+                        <li class="page-item disabled"><span class="page-link">{{ caches.page }} / {{ caches.pages }}</span></li>
+                        {% if caches.has_next %}
+                        <li class="page-item"><a class="page-link" href="?page={{ caches.next_num }}">下一页</a></li>
+                        {% endif %}
+                    </ul>
+                </nav>
+            </div>
+        </div>
+    </main>
+
+    <script>
+        function deleteCache(id) {
+            if (!confirm('确定删除此缓存？')) return;
+            fetch(`/admin/cache/${id}/delete`, { method: 'POST' })
+                .then(r => r.json())
+                .then(d => { if (d.success) location.reload(); });
+        }
+        
+        function clearCache() {
+            if (!confirm('确定清空所有缓存？此操作不可恢复！')) return;
+            fetch('/admin/cache/clear', { method: 'POST' })
+                .then(r => r.json())
+                .then(d => {
+                    if (d.success) {
+                        alert('已删除 ' + d.deleted + ' 个缓存');
+                        location.reload();
+                    }
+                });
+        }
+    </script>
+</body>
+</html>
\ No newline at end of file
diff --git a/templates/admin/cache.html.bak b/templates/admin/cache.html.bak
new file mode 100644
index 0000000..f29363a
--- /dev/null
+++ b/templates/admin/cache.html.bak
@@ -0,0 +1,140 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <title>缓存管理 - 后台管理</title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.0/font/bootstrap-icons.css" rel="stylesheet">
+    <style>
+        body { background-color: #f5f5f5; }
+        .sidebar { position: fixed; top: 0; left: 0; height: 100vh; width: 250px; background: #343a40; padding-top: 60px; }
+        .sidebar .nav-link { color: #adb5bd; padding: 12px 20px; }
+        .sidebar .nav-link:hover, .sidebar .nav-link.active { color: #fff; background: rgba(255,255,255,0.1); }
+        .main-content { margin-left: 250px; padding: 20px; }
+    </style>
+</head>
+<body>
+    <nav class="sidebar">
+        <div class="position-absolute top-0 w-100 p-3 border-bottom border-secondary">
+            <h5 class="text-white mb-0"><i class="bi bi-gear-fill"></i> 后台管理</h5>
+        </div>
+        <ul class="nav flex-column">
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.dashboard') }}"><i class="bi bi-speedometer2"></i> 数据概览</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.users') }}"><i class="bi bi-people"></i> 用户管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.translations') }}"><i class="bi bi-file-text"></i> 翻译记录</a></li>
+            <li class="nav-item"><a class="nav-link active" href="{{ url_for('admin.cache_list') }}"><i class="bi bi-database"></i> 缓存管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.stats') }}"><i class="bi bi-bar-chart"></i> 统计报表</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.logs') }}"><i class="bi bi-list-check"></i> 操作日志</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.settings') }}"><i class="bi bi-sliders"></i> 系统配置</a></li>
+        </ul>
+        <div class="position-absolute bottom-0 w-100 p-3 border-top border-secondary">
+            <a href="/" class="btn btn-outline-light btn-sm w-100"><i class="bi bi-house"></i> 返回前台</a>
+        </div>
+    </nav>
+
+    <main class="main-content">
+        <!-- 统计卡片 -->
+        <div class="row mb-4">
+            <div class="col-md-4">
+                <div class="card">
+                    <div class="card-body text-center">
+                        <h6 class="text-muted">缓存总数</h6>
+                        <h2>{{ caches.total }}</h2>
+                    </div>
+                </div>
+            </div>
+            <div class="col-md-4">
+                <div class="card">
+                    <div class="card-body text-center">
+                        <h6 class="text-muted">缓存大小</h6>
+                        <h2>{{ (total_size / 1024 / 1024)|round(2) }} MB</h2>
+                    </div>
+                </div>
+            </div>
+            <div class="col-md-4">
+                <div class="card">
+                    <div class="card-body text-center">
+                        <h6 class="text-muted">总命中次数</h6>
+                        <h2>{{ total_hits }}</h2>
+                    </div>
+                </div>
+            </div>
+        </div>
+
+        <div class="card">
+            <div class="card-header d-flex justify-content-between">
+                <h5 class="mb-0"><i class="bi bi-database"></i> 缓存列表</h5>
+                <button class="btn btn-danger btn-sm" onclick="clearCache()">
+                    <i class="bi bi-trash"></i> 清空缓存
+                </button>
+            </div>
+            <div class="card-body p-0">
+                <table class="table table-hover mb-0">
+                    <thead class="table-light">
+                        <tr>
+                            <th>文件哈希</th>
+                            <th>页数</th>
+                            <th>大小</th>
+                            <th>命中次数</th>
+                            <th>创建时间</th>
+                            <th>操作</th>
+                        </tr>
+                    </thead>
+                    <tbody>
+                        {% for c in caches.items %}
+                        <tr>
+                            <td><code>{{ c.file_hash[:16] }}...</code></td>
+                            <td>{{ c.page_count }}</td>
+                            <td>{{ (c.file_size / 1024)|round(1) }}KB</td>
+                            <td><span class="badge bg-info">{{ c.hit_count }}</span></td>
+                            <td>{{ c.created_at.strftime('%m-%d %H:%M') }}</td>
+                            <td>
+                                <button class="btn btn-sm btn-outline-danger" onclick="deleteCache({{ c.id }})">
+                                    <i class="bi bi-trash"></i>
+                                </button>
+                            </td>
+                        </tr>
+                        {% else %}
+                        <tr><td colspan="6" class="text-center text-muted py-4">暂无缓存</td></tr>
+                        {% endfor %}
+                    </tbody>
+                </table>
+            </div>
+            <div class="card-footer">
+                <nav>
+                    <ul class="pagination mb-0">
+                        {% if caches.has_prev %}
+                        <li class="page-item"><a class="page-link" href="?page={{ caches.prev_num }}">上一页</a></li>
+                        {% endif %}
+                        <li class="page-item disabled"><span class="page-link">{{ caches.page }} / {{ caches.pages }}</span></li>
+                        {% if caches.has_next %}
+                        <li class="page-item"><a class="page-link" href="?page={{ caches.next_num }}">下一页</a></li>
+                        {% endif %}
+                    </ul>
+                </nav>
+            </div>
+        </div>
+    </main>
+
+    <script>
+        function deleteCache(id) {
+            if (!confirm('确定删除此缓存？')) return;
+            fetch(`/admin/cache/${id}/delete`, { method: 'POST' })
+                .then(r => r.json())
+                .then(d => { if (d.success) location.reload(); });
+        }
+        
+        function clearCache() {
+            if (!confirm('确定清空所有缓存？此操作不可恢复！')) return;
+            fetch('/admin/cache/clear', { method: 'POST' })
+                .then(r => r.json())
+                .then(d => {
+                    if (d.success) {
+                        alert('已删除 ' + d.deleted + ' 个缓存');
+                        location.reload();
+                    }
+                });
+        }
+    </script>
+</body>
+</html>
\ No newline at end of file
diff --git a/templates/admin/dashboard.html b/templates/admin/dashboard.html
new file mode 100644
index 0000000..3733643
--- /dev/null
+++ b/templates/admin/dashboard.html
@@ -0,0 +1,294 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>后台管理 - PDF翻译助手</title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.0/font/bootstrap-icons.css" rel="stylesheet">
+    <style>
+        body { background-color: #f5f5f5; }
+        .sidebar {
+            position: fixed;
+            top: 0;
+            left: 0;
+            height: 100vh;
+            width: 250px;
+            background: #343a40;
+            padding-top: 60px;
+            z-index: 1000;
+        }
+        .sidebar .nav-link {
+            color: #adb5bd;
+            padding: 12px 20px;
+            border-left: 3px solid transparent;
+        }
+        .sidebar .nav-link:hover,
+        .sidebar .nav-link.active {
+            color: #fff;
+            background: rgba(255,255,255,0.1);
+            border-left-color: #0d6efd;
+        }
+        .sidebar .nav-link i { margin-right: 10px; }
+        .main-content {
+            margin-left: 250px;
+            padding: 20px;
+        }
+        .stat-card {
+            border-radius: 10px;
+            border: none;
+            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
+        }
+        .stat-card .icon {
+            width: 60px;
+            height: 60px;
+            border-radius: 10px;
+            display: flex;
+            align-items: center;
+            justify-content: center;
+            font-size: 24px;
+        }
+        .stat-card .icon.blue { background: rgba(13, 110, 253, 0.1); color: #0d6efd; }
+        .stat-card .icon.green { background: rgba(25, 135, 84, 0.1); color: #198754; }
+        .stat-card .icon.orange { background: rgba(253, 126, 20, 0.1); color: #fd7e14; }
+        .stat-card .icon.purple { background: rgba(111, 66, 193, 0.1); color: #6f42c1; }
+    </style>
+</head>
+<body>
+    <!-- 侧边栏 -->
+    <nav class="sidebar">
+        <div class="position-absolute top-0 w-100 p-3 border-bottom border-secondary">
+            <h5 class="text-white mb-0">
+                <i class="bi bi-gear-fill"></i> 后台管理
+            </h5>
+        </div>
+        <ul class="nav flex-column">
+            <li class="nav-item">
+                <a class="nav-link active" href="{{ url_for('admin.dashboard') }}">
+                    <i class="bi bi-speedometer2"></i> 数据概览
+                </a>
+            </li>
+            <li class="nav-item">
+                <a class="nav-link" href="{{ url_for('admin.users') }}">
+                    <i class="bi bi-people"></i> 用户管理
+                </a>
+            </li>
+            <li class="nav-item">
+                <a class="nav-link" href="{{ url_for('admin.translations') }}">
+                    <i class="bi bi-file-text"></i> 翻译记录
+                </a>
+            </li>
+            <li class="nav-item">
+                <a class="nav-link" href="{{ url_for('admin.cache_list') }}">
+                    <i class="bi bi-database"></i> 缓存管理
+                </a>
+            </li>
+            <li class="nav-item">
+                <a class="nav-link" href="{{ url_for('admin.stats') }}">
+                    <i class="bi bi-bar-chart"></i> 统计报表
+                </a>
+            </li>
+            <li class="nav-item">
+                <a class="nav-link" href="{{ url_for('admin.logs') }}">
+                    <i class="bi bi-list-check"></i> 操作日志
+                </a>
+            </li>
+            <li class="nav-item">
+                <a class="nav-link" href="{{ url_for('admin.settings') }}">
+                    <i class="bi bi-sliders"></i> 系统配置
+                </a>
+            </li>
+        </ul>
+        <div class="position-absolute bottom-0 w-100 p-3 border-top border-secondary">
+            <a href="/" class="btn btn-outline-light btn-sm w-100">
+                <i class="bi bi-house"></i> 返回前台
+            </a>
+        </div>
+    </nav>
+
+    <!-- 主内容区 -->
+    <main class="main-content">
+        <!-- 统计卡片 -->
+        <div class="row mb-4">
+            <div class="col-md-3">
+                <div class="card stat-card">
+                    <div class="card-body d-flex align-items-center">
+                        <div class="icon blue me-3"><i class="bi bi-people-fill"></i></div>
+                        <div>
+                            <div class="text-muted small">总用户数</div>
+                            <div class="fs-4 fw-bold">{{ total_users }}</div>
+                            <div class="text-success small">今日 +{{ new_users_today }}</div>
+                        </div>
+                    </div>
+                </div>
+            </div>
+            <div class="col-md-3">
+                <div class="card stat-card">
+                    <div class="card-body d-flex align-items-center">
+                        <div class="icon green me-3"><i class="bi bi-file-earmark-text"></i></div>
+                        <div>
+                            <div class="text-muted small">总翻译次数</div>
+                            <div class="fs-4 fw-bold">{{ total_translations }}</div>
+                            <div class="text-success small">今日 +{{ today_translations }}</div>
+                        </div>
+                    </div>
+                </div>
+            </div>
+            <div class="col-md-3">
+                <div class="card stat-card">
+                    <div class="card-body d-flex align-items-center">
+                        <div class="icon orange me-3"><i class="bi bi-crown"></i></div>
+                        <div>
+                            <div class="text-muted small">VIP用户</div>
+                            <div class="fs-4 fw-bold">{{ vip_users }}</div>
+                        </div>
+                    </div>
+                </div>
+            </div>
+            <div class="col-md-3">
+                <div class="card stat-card">
+                    <div class="card-body d-flex align-items-center">
+                        <div class="icon purple me-3"><i class="bi bi-database-fill"></i></div>
+                        <div>
+                            <div class="text-muted small">缓存数量</div>
+                            <div class="fs-4 fw-bold">{{ total_cache }}</div>
+                            <div class="text-info small">命中 {{ total_cache_hits }} 次</div>
+                        </div>
+                    </div>
+                </div>
+            </div>
+        </div>
+
+        <div class="row">
+            <!-- 每日翻译趋势 -->
+            <div class="col-md-8 mb-4">
+                <div class="card">
+                    <div class="card-header">
+                        <h6 class="mb-0"><i class="bi bi-graph-up"></i> 每日翻译趋势（最近7天）</h6>
+                    </div>
+                    <div class="card-body">
+                        <canvas id="trendChart" height="100"></canvas>
+                    </div>
+                </div>
+            </div>
+
+            <!-- 快捷操作 -->
+            <div class="col-md-4 mb-4">
+                <div class="card">
+                    <div class="card-header">
+                        <h6 class="mb-0"><i class="bi bi-lightning"></i> 快捷操作</h6>
+                    </div>
+                    <div class="card-body">
+                        <a href="{{ url_for('admin.users') }}" class="btn btn-outline-primary w-100 mb-2">
+                            <i class="bi bi-person-plus"></i> 添加用户
+                        </a>
+                        <a href="{{ url_for('admin.cache_list') }}" class="btn btn-outline-warning w-100 mb-2">
+                            <i class="bi bi-trash"></i> 清理缓存
+                        </a>
+                        <a href="{{ url_for('admin.settings') }}" class="btn btn-outline-secondary w-100">
+                            <i class="bi bi-gear"></i> 系统配置
+                        </a>
+                    </div>
+                </div>
+            </div>
+        </div>
+
+        <div class="row">
+            <!-- 最近翻译 -->
+            <div class="col-md-6 mb-4">
+                <div class="card">
+                    <div class="card-header d-flex justify-content-between">
+                        <h6 class="mb-0"><i class="bi bi-clock-history"></i> 最近翻译</h6>
+                        <a href="{{ url_for('admin.translations') }}" class="small">查看全部</a>
+                    </div>
+                    <div class="card-body p-0">
+                        <table class="table table-hover mb-0">
+                            <thead>
+                                <tr>
+                                    <th>文件名</th>
+                                    <th>状态</th>
+                                    <th>时间</th>
+                                </tr>
+                            </thead>
+                            <tbody>
+                                {% for t in recent_translations %}
+                                <tr>
+                                    <td>{{ t.original_filename[:30] }}{% if t.original_filename|length > 30 %}...{% endif %}</td>
+                                    <td>
+                                        <span class="badge bg-{% if t.status == 'completed' %}success{% elif t.status == 'processing' %}warning{% else %}danger{% endif %}">
+                                            {{ t.status }}
+                                        </span>
+                                    </td>
+                                    <td><small>{{ t.created_at.strftime('%H:%M') }}</small></td>
+                                </tr>
+                                {% endfor %}
+                            </tbody>
+                        </table>
+                    </div>
+                </div>
+            </div>
+
+            <!-- 最近用户 -->
+            <div class="col-md-6 mb-4">
+                <div class="card">
+                    <div class="card-header d-flex justify-content-between">
+                        <h6 class="mb-0"><i class="bi bi-person-lines-fill"></i> 最近注册</h6>
+                        <a href="{{ url_for('admin.users') }}" class="small">查看全部</a>
+                    </div>
+                    <div class="card-body p-0">
+                        <table class="table table-hover mb-0">
+                            <thead>
+                                <tr>
+                                    <th>用户名</th>
+                                    <th>类型</th>
+                                    <th>注册时间</th>
+                                </tr>
+                            </thead>
+                            <tbody>
+                                {% for u in recent_users %}
+                                <tr>
+                                    <td>{{ u.username }}</td>
+                                    <td>
+                                        <span class="badge bg-{% if u.user_type == 'free' %}secondary{% elif 'vip' in u.user_type %}warning{% else %}primary{% endif %}">
+                                            {{ u.user_type }}
+                                        </span>
+                                    </td>
+                                    <td><small>{{ u.created_at.strftime('%m-%d %H:%M') }}</small></td>
+                                </tr>
+                                {% endfor %}
+                            </tbody>
+                        </table>
+                    </div>
+                </div>
+            </div>
+        </div>
+    </main>
+
+    <script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
+    <script>
+        // 绘制趋势图
+        const ctx = document.getElementById('trendChart').getContext('2d');
+        const data = {{ daily_stats | tojson }};
+        
+        new Chart(ctx, {
+            type: 'line',
+            data: {
+                labels: data.map(d => d.date),
+                datasets: [{
+                    label: '翻译次数',
+                    data: data.map(d => d.count),
+                    borderColor: '#0d6efd',
+                    backgroundColor: 'rgba(13, 110, 253, 0.1)',
+                    fill: true,
+                    tension: 0.3
+                }]
+            },
+            options: {
+                responsive: true,
+                plugins: { legend: { display: false } },
+                scales: { y: { beginAtZero: true } }
+            }
+        });
+    </script>
+</body>
+</html>
\ No newline at end of file
diff --git a/templates/admin/dashboard.html.bak b/templates/admin/dashboard.html.bak
new file mode 100644
index 0000000..3733643
--- /dev/null
+++ b/templates/admin/dashboard.html.bak
@@ -0,0 +1,294 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>后台管理 - PDF翻译助手</title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.0/font/bootstrap-icons.css" rel="stylesheet">
+    <style>
+        body { background-color: #f5f5f5; }
+        .sidebar {
+            position: fixed;
+            top: 0;
+            left: 0;
+            height: 100vh;
+            width: 250px;
+            background: #343a40;
+            padding-top: 60px;
+            z-index: 1000;
+        }
+        .sidebar .nav-link {
+            color: #adb5bd;
+            padding: 12px 20px;
+            border-left: 3px solid transparent;
+        }
+        .sidebar .nav-link:hover,
+        .sidebar .nav-link.active {
+            color: #fff;
+            background: rgba(255,255,255,0.1);
+            border-left-color: #0d6efd;
+        }
+        .sidebar .nav-link i { margin-right: 10px; }
+        .main-content {
+            margin-left: 250px;
+            padding: 20px;
+        }
+        .stat-card {
+            border-radius: 10px;
+            border: none;
+            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
+        }
+        .stat-card .icon {
+            width: 60px;
+            height: 60px;
+            border-radius: 10px;
+            display: flex;
+            align-items: center;
+            justify-content: center;
+            font-size: 24px;
+        }
+        .stat-card .icon.blue { background: rgba(13, 110, 253, 0.1); color: #0d6efd; }
+        .stat-card .icon.green { background: rgba(25, 135, 84, 0.1); color: #198754; }
+        .stat-card .icon.orange { background: rgba(253, 126, 20, 0.1); color: #fd7e14; }
+        .stat-card .icon.purple { background: rgba(111, 66, 193, 0.1); color: #6f42c1; }
+    </style>
+</head>
+<body>
+    <!-- 侧边栏 -->
+    <nav class="sidebar">
+        <div class="position-absolute top-0 w-100 p-3 border-bottom border-secondary">
+            <h5 class="text-white mb-0">
+                <i class="bi bi-gear-fill"></i> 后台管理
+            </h5>
+        </div>
+        <ul class="nav flex-column">
+            <li class="nav-item">
+                <a class="nav-link active" href="{{ url_for('admin.dashboard') }}">
+                    <i class="bi bi-speedometer2"></i> 数据概览
+                </a>
+            </li>
+            <li class="nav-item">
+                <a class="nav-link" href="{{ url_for('admin.users') }}">
+                    <i class="bi bi-people"></i> 用户管理
+                </a>
+            </li>
+            <li class="nav-item">
+                <a class="nav-link" href="{{ url_for('admin.translations') }}">
+                    <i class="bi bi-file-text"></i> 翻译记录
+                </a>
+            </li>
+            <li class="nav-item">
+                <a class="nav-link" href="{{ url_for('admin.cache_list') }}">
+                    <i class="bi bi-database"></i> 缓存管理
+                </a>
+            </li>
+            <li class="nav-item">
+                <a class="nav-link" href="{{ url_for('admin.stats') }}">
+                    <i class="bi bi-bar-chart"></i> 统计报表
+                </a>
+            </li>
+            <li class="nav-item">
+                <a class="nav-link" href="{{ url_for('admin.logs') }}">
+                    <i class="bi bi-list-check"></i> 操作日志
+                </a>
+            </li>
+            <li class="nav-item">
+                <a class="nav-link" href="{{ url_for('admin.settings') }}">
+                    <i class="bi bi-sliders"></i> 系统配置
+                </a>
+            </li>
+        </ul>
+        <div class="position-absolute bottom-0 w-100 p-3 border-top border-secondary">
+            <a href="/" class="btn btn-outline-light btn-sm w-100">
+                <i class="bi bi-house"></i> 返回前台
+            </a>
+        </div>
+    </nav>
+
+    <!-- 主内容区 -->
+    <main class="main-content">
+        <!-- 统计卡片 -->
+        <div class="row mb-4">
+            <div class="col-md-3">
+                <div class="card stat-card">
+                    <div class="card-body d-flex align-items-center">
+                        <div class="icon blue me-3"><i class="bi bi-people-fill"></i></div>
+                        <div>
+                            <div class="text-muted small">总用户数</div>
+                            <div class="fs-4 fw-bold">{{ total_users }}</div>
+                            <div class="text-success small">今日 +{{ new_users_today }}</div>
+                        </div>
+                    </div>
+                </div>
+            </div>
+            <div class="col-md-3">
+                <div class="card stat-card">
+                    <div class="card-body d-flex align-items-center">
+                        <div class="icon green me-3"><i class="bi bi-file-earmark-text"></i></div>
+                        <div>
+                            <div class="text-muted small">总翻译次数</div>
+                            <div class="fs-4 fw-bold">{{ total_translations }}</div>
+                            <div class="text-success small">今日 +{{ today_translations }}</div>
+                        </div>
+                    </div>
+                </div>
+            </div>
+            <div class="col-md-3">
+                <div class="card stat-card">
+                    <div class="card-body d-flex align-items-center">
+                        <div class="icon orange me-3"><i class="bi bi-crown"></i></div>
+                        <div>
+                            <div class="text-muted small">VIP用户</div>
+                            <div class="fs-4 fw-bold">{{ vip_users }}</div>
+                        </div>
+                    </div>
+                </div>
+            </div>
+            <div class="col-md-3">
+                <div class="card stat-card">
+                    <div class="card-body d-flex align-items-center">
+                        <div class="icon purple me-3"><i class="bi bi-database-fill"></i></div>
+                        <div>
+                            <div class="text-muted small">缓存数量</div>
+                            <div class="fs-4 fw-bold">{{ total_cache }}</div>
+                            <div class="text-info small">命中 {{ total_cache_hits }} 次</div>
+                        </div>
+                    </div>
+                </div>
+            </div>
+        </div>
+
+        <div class="row">
+            <!-- 每日翻译趋势 -->
+            <div class="col-md-8 mb-4">
+                <div class="card">
+                    <div class="card-header">
+                        <h6 class="mb-0"><i class="bi bi-graph-up"></i> 每日翻译趋势（最近7天）</h6>
+                    </div>
+                    <div class="card-body">
+                        <canvas id="trendChart" height="100"></canvas>
+                    </div>
+                </div>
+            </div>
+
+            <!-- 快捷操作 -->
+            <div class="col-md-4 mb-4">
+                <div class="card">
+                    <div class="card-header">
+                        <h6 class="mb-0"><i class="bi bi-lightning"></i> 快捷操作</h6>
+                    </div>
+                    <div class="card-body">
+                        <a href="{{ url_for('admin.users') }}" class="btn btn-outline-primary w-100 mb-2">
+                            <i class="bi bi-person-plus"></i> 添加用户
+                        </a>
+                        <a href="{{ url_for('admin.cache_list') }}" class="btn btn-outline-warning w-100 mb-2">
+                            <i class="bi bi-trash"></i> 清理缓存
+                        </a>
+                        <a href="{{ url_for('admin.settings') }}" class="btn btn-outline-secondary w-100">
+                            <i class="bi bi-gear"></i> 系统配置
+                        </a>
+                    </div>
+                </div>
+            </div>
+        </div>
+
+        <div class="row">
+            <!-- 最近翻译 -->
+            <div class="col-md-6 mb-4">
+                <div class="card">
+                    <div class="card-header d-flex justify-content-between">
+                        <h6 class="mb-0"><i class="bi bi-clock-history"></i> 最近翻译</h6>
+                        <a href="{{ url_for('admin.translations') }}" class="small">查看全部</a>
+                    </div>
+                    <div class="card-body p-0">
+                        <table class="table table-hover mb-0">
+                            <thead>
+                                <tr>
+                                    <th>文件名</th>
+                                    <th>状态</th>
+                                    <th>时间</th>
+                                </tr>
+                            </thead>
+                            <tbody>
+                                {% for t in recent_translations %}
+                                <tr>
+                                    <td>{{ t.original_filename[:30] }}{% if t.original_filename|length > 30 %}...{% endif %}</td>
+                                    <td>
+                                        <span class="badge bg-{% if t.status == 'completed' %}success{% elif t.status == 'processing' %}warning{% else %}danger{% endif %}">
+                                            {{ t.status }}
+                                        </span>
+                                    </td>
+                                    <td><small>{{ t.created_at.strftime('%H:%M') }}</small></td>
+                                </tr>
+                                {% endfor %}
+                            </tbody>
+                        </table>
+                    </div>
+                </div>
+            </div>
+
+            <!-- 最近用户 -->
+            <div class="col-md-6 mb-4">
+                <div class="card">
+                    <div class="card-header d-flex justify-content-between">
+                        <h6 class="mb-0"><i class="bi bi-person-lines-fill"></i> 最近注册</h6>
+                        <a href="{{ url_for('admin.users') }}" class="small">查看全部</a>
+                    </div>
+                    <div class="card-body p-0">
+                        <table class="table table-hover mb-0">
+                            <thead>
+                                <tr>
+                                    <th>用户名</th>
+                                    <th>类型</th>
+                                    <th>注册时间</th>
+                                </tr>
+                            </thead>
+                            <tbody>
+                                {% for u in recent_users %}
+                                <tr>
+                                    <td>{{ u.username }}</td>
+                                    <td>
+                                        <span class="badge bg-{% if u.user_type == 'free' %}secondary{% elif 'vip' in u.user_type %}warning{% else %}primary{% endif %}">
+                                            {{ u.user_type }}
+                                        </span>
+                                    </td>
+                                    <td><small>{{ u.created_at.strftime('%m-%d %H:%M') }}</small></td>
+                                </tr>
+                                {% endfor %}
+                            </tbody>
+                        </table>
+                    </div>
+                </div>
+            </div>
+        </div>
+    </main>
+
+    <script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
+    <script>
+        // 绘制趋势图
+        const ctx = document.getElementById('trendChart').getContext('2d');
+        const data = {{ daily_stats | tojson }};
+        
+        new Chart(ctx, {
+            type: 'line',
+            data: {
+                labels: data.map(d => d.date),
+                datasets: [{
+                    label: '翻译次数',
+                    data: data.map(d => d.count),
+                    borderColor: '#0d6efd',
+                    backgroundColor: 'rgba(13, 110, 253, 0.1)',
+                    fill: true,
+                    tension: 0.3
+                }]
+            },
+            options: {
+                responsive: true,
+                plugins: { legend: { display: false } },
+                scales: { y: { beginAtZero: true } }
+            }
+        });
+    </script>
+</body>
+</html>
\ No newline at end of file
diff --git a/templates/admin/logs.html b/templates/admin/logs.html
new file mode 100644
index 0000000..d7cbaef
--- /dev/null
+++ b/templates/admin/logs.html
@@ -0,0 +1,103 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <title>操作日志 - 后台管理</title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.0/font/bootstrap-icons.css" rel="stylesheet">
+    <style>
+        body { background-color: #f5f5f5; }
+        .sidebar { position: fixed; top: 0; left: 0; height: 100vh; width: 250px; background: #343a40; padding-top: 60px; }
+        .sidebar .nav-link { color: #adb5bd; padding: 12px 20px; }
+        .sidebar .nav-link:hover, .sidebar .nav-link.active { color: #fff; background: rgba(255,255,255,0.1); }
+        .main-content { margin-left: 250px; padding: 20px; }
+    </style>
+</head>
+<body>
+    <nav class="sidebar">
+        <div class="position-absolute top-0 w-100 p-3 border-bottom border-secondary">
+            <h5 class="text-white mb-0"><i class="bi bi-gear-fill"></i> 后台管理</h5>
+        </div>
+        <ul class="nav flex-column">
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.dashboard') }}"><i class="bi bi-speedometer2"></i> 数据概览</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.users') }}"><i class="bi bi-people"></i> 用户管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.translations') }}"><i class="bi bi-file-text"></i> 翻译记录</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.cache_list') }}"><i class="bi bi-database"></i> 缓存管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.stats') }}"><i class="bi bi-bar-chart"></i> 统计报表</a></li>
+            <li class="nav-item"><a class="nav-link active" href="{{ url_for('admin.logs') }}"><i class="bi bi-list-check"></i> 操作日志</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.settings') }}"><i class="bi bi-sliders"></i> 系统配置</a></li>
+        </ul>
+        <div class="position-absolute bottom-0 w-100 p-3 border-top border-secondary">
+            <a href="/" class="btn btn-outline-light btn-sm w-100"><i class="bi bi-house"></i> 返回前台</a>
+        </div>
+    </nav>
+
+    <main class="main-content">
+        <div class="card">
+            <div class="card-header">
+                <div class="row align-items-center">
+                    <div class="col"><h5 class="mb-0"><i class="bi bi-list-check"></i> 操作日志</h5></div>
+                    <div class="col-auto">
+                        <form method="get" class="d-flex gap-2">
+                            <select class="form-select" name="action">
+                                <option value="">全部操作</option>
+                                <option value="login" {% if action == 'login' %}selected{% endif %}>登录</option>
+                                <option value="translate" {% if action == 'translate' %}selected{% endif %}>翻译</option>
+                                <option value="register" {% if action == 'register' %}selected{% endif %}>注册</option>
+                                <option value="edit_user" {% if action == 'edit_user' %}selected{% endif %}>编辑用户</option>
+                                <option value="delete_user" {% if action == 'delete_user' %}selected{% endif %}>删除用户</option>
+                            </select>
+                            <button class="btn btn-primary"><i class="bi bi-filter"></i> 筛选</button>
+                        </form>
+                    </div>
+                </div>
+            </div>
+            <div class="card-body p-0">
+                <table class="table table-hover mb-0">
+                    <thead class="table-light">
+                        <tr>
+                            <th>ID</th>
+                            <th>操作者</th>
+                            <th>操作类型</th>
+                            <th>操作对象</th>
+                            <th>IP地址</th>
+                            <th>时间</th>
+                        </tr>
+                    </thead>
+                    <tbody>
+                        {% for log in logs.items %}
+                        <tr>
+                            <td>{{ log.id }}</td>
+                            <td>{{ log.username or '系统' }}</td>
+                            <td>
+                                <span class="badge bg-{% if log.action == 'login' %}info{% elif log.action == 'translate' %}success{% elif 'delete' in log.action %}danger{% else %}secondary{% endif %}">
+                                    {{ log.action }}
+                                </span>
+                            </td>
+                            <td>{{ log.target or '-' }}</td>
+                            <td><code>{{ log.ip_address or '-' }}</code></td>
+                            <td>{{ log.created_at.strftime('%Y-%m-%d %H:%M:%S') }}</td>
+                        </tr>
+                        {% else %}
+                        <tr><td colspan="6" class="text-center text-muted py-4">暂无日志</td></tr>
+                        {% endfor %}
+                    </tbody>
+                </table>
+            </div>
+            <div class="card-footer">
+                <nav>
+                    <ul class="pagination mb-0">
+                        {% if logs.has_prev %}
+                        <li class="page-item"><a class="page-link" href="?page={{ logs.prev_num }}&action={{ action }}">上一页</a></li>
+                        {% endif %}
+                        <li class="page-item disabled"><span class="page-link">{{ logs.page }} / {{ logs.pages }}</span></li>
+                        {% if logs.has_next %}
+                        <li class="page-item"><a class="page-link" href="?page={{ logs.next_num }}&action={{ action }}">下一页</a></li>
+                        {% endif %}
+                    </ul>
+                </nav>
+            </div>
+        </div>
+    </main>
+</body>
+</html>
\ No newline at end of file
diff --git a/templates/admin/logs.html.bak b/templates/admin/logs.html.bak
new file mode 100644
index 0000000..d7cbaef
--- /dev/null
+++ b/templates/admin/logs.html.bak
@@ -0,0 +1,103 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <title>操作日志 - 后台管理</title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.0/font/bootstrap-icons.css" rel="stylesheet">
+    <style>
+        body { background-color: #f5f5f5; }
+        .sidebar { position: fixed; top: 0; left: 0; height: 100vh; width: 250px; background: #343a40; padding-top: 60px; }
+        .sidebar .nav-link { color: #adb5bd; padding: 12px 20px; }
+        .sidebar .nav-link:hover, .sidebar .nav-link.active { color: #fff; background: rgba(255,255,255,0.1); }
+        .main-content { margin-left: 250px; padding: 20px; }
+    </style>
+</head>
+<body>
+    <nav class="sidebar">
+        <div class="position-absolute top-0 w-100 p-3 border-bottom border-secondary">
+            <h5 class="text-white mb-0"><i class="bi bi-gear-fill"></i> 后台管理</h5>
+        </div>
+        <ul class="nav flex-column">
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.dashboard') }}"><i class="bi bi-speedometer2"></i> 数据概览</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.users') }}"><i class="bi bi-people"></i> 用户管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.translations') }}"><i class="bi bi-file-text"></i> 翻译记录</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.cache_list') }}"><i class="bi bi-database"></i> 缓存管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.stats') }}"><i class="bi bi-bar-chart"></i> 统计报表</a></li>
+            <li class="nav-item"><a class="nav-link active" href="{{ url_for('admin.logs') }}"><i class="bi bi-list-check"></i> 操作日志</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.settings') }}"><i class="bi bi-sliders"></i> 系统配置</a></li>
+        </ul>
+        <div class="position-absolute bottom-0 w-100 p-3 border-top border-secondary">
+            <a href="/" class="btn btn-outline-light btn-sm w-100"><i class="bi bi-house"></i> 返回前台</a>
+        </div>
+    </nav>
+
+    <main class="main-content">
+        <div class="card">
+            <div class="card-header">
+                <div class="row align-items-center">
+                    <div class="col"><h5 class="mb-0"><i class="bi bi-list-check"></i> 操作日志</h5></div>
+                    <div class="col-auto">
+                        <form method="get" class="d-flex gap-2">
+                            <select class="form-select" name="action">
+                                <option value="">全部操作</option>
+                                <option value="login" {% if action == 'login' %}selected{% endif %}>登录</option>
+                                <option value="translate" {% if action == 'translate' %}selected{% endif %}>翻译</option>
+                                <option value="register" {% if action == 'register' %}selected{% endif %}>注册</option>
+                                <option value="edit_user" {% if action == 'edit_user' %}selected{% endif %}>编辑用户</option>
+                                <option value="delete_user" {% if action == 'delete_user' %}selected{% endif %}>删除用户</option>
+                            </select>
+                            <button class="btn btn-primary"><i class="bi bi-filter"></i> 筛选</button>
+                        </form>
+                    </div>
+                </div>
+            </div>
+            <div class="card-body p-0">
+                <table class="table table-hover mb-0">
+                    <thead class="table-light">
+                        <tr>
+                            <th>ID</th>
+                            <th>操作者</th>
+                            <th>操作类型</th>
+                            <th>操作对象</th>
+                            <th>IP地址</th>
+                            <th>时间</th>
+                        </tr>
+                    </thead>
+                    <tbody>
+                        {% for log in logs.items %}
+                        <tr>
+                            <td>{{ log.id }}</td>
+                            <td>{{ log.username or '系统' }}</td>
+                            <td>
+                                <span class="badge bg-{% if log.action == 'login' %}info{% elif log.action == 'translate' %}success{% elif 'delete' in log.action %}danger{% else %}secondary{% endif %}">
+                                    {{ log.action }}
+                                </span>
+                            </td>
+                            <td>{{ log.target or '-' }}</td>
+                            <td><code>{{ log.ip_address or '-' }}</code></td>
+                            <td>{{ log.created_at.strftime('%Y-%m-%d %H:%M:%S') }}</td>
+                        </tr>
+                        {% else %}
+                        <tr><td colspan="6" class="text-center text-muted py-4">暂无日志</td></tr>
+                        {% endfor %}
+                    </tbody>
+                </table>
+            </div>
+            <div class="card-footer">
+                <nav>
+                    <ul class="pagination mb-0">
+                        {% if logs.has_prev %}
+                        <li class="page-item"><a class="page-link" href="?page={{ logs.prev_num }}&action={{ action }}">上一页</a></li>
+                        {% endif %}
+                        <li class="page-item disabled"><span class="page-link">{{ logs.page }} / {{ logs.pages }}</span></li>
+                        {% if logs.has_next %}
+                        <li class="page-item"><a class="page-link" href="?page={{ logs.next_num }}&action={{ action }}">下一页</a></li>
+                        {% endif %}
+                    </ul>
+                </nav>
+            </div>
+        </div>
+    </main>
+</body>
+</html>
\ No newline at end of file
diff --git a/templates/admin/membership.html b/templates/admin/membership.html
new file mode 100644
index 0000000..2671fc4
--- /dev/null
+++ b/templates/admin/membership.html
@@ -0,0 +1,147 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <title>会员套餐配置 - 后台管理</title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.0/font/bootstrap-icons.css" rel="stylesheet">
+    <style>
+        body { background-color: #f5f5f5; }
+        .sidebar { position: fixed; top: 0; left: 0; height: 100vh; width: 250px; background: #343a40; padding-top: 60px; }
+        .sidebar .nav-link { color: #adb5bd; padding: 12px 20px; }
+        .sidebar .nav-link:hover, .sidebar .nav-link.active { color: #fff; background: rgba(255,255,255,0.1); }
+        .main-content { margin-left: 250px; padding: 20px; }
+        .plan-card { border-radius: 10px; transition: transform 0.3s; }
+        .plan-card:hover { transform: translateY(-5px); }
+        .plan-card.basic { border-top: 4px solid #6c757d; }
+        .plan-card.pro { border-top: 4px solid #ffc107; }
+        .plan-card.enterprise { border-top: 4px solid #0d6efd; }
+    </style>
+</head>
+<body>
+    <nav class="sidebar">
+        <div class="position-absolute top-0 w-100 p-3 border-bottom border-secondary">
+            <h5 class="text-white mb-0"><i class="bi bi-gear-fill"></i> 后台管理</h5>
+        </div>
+        <ul class="nav flex-column">
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.dashboard') }}"><i class="bi bi-speedometer2"></i> 数据概览</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.users') }}"><i class="bi bi-people"></i> 用户管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.translations') }}"><i class="bi bi-file-text"></i> 翻译记录</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.cache_list') }}"><i class="bi bi-database"></i> 缓存管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.packages') }}"><i class="bi bi-box-seam"></i> 数据包套餐</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.stats') }}"><i class="bi bi-bar-chart"></i> 统计报表</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.logs') }}"><i class="bi bi-list-check"></i> 操作日志</a></li>
+            <li class="nav-item"><a class="nav-link active" href="{{ url_for('admin.settings') }}"><i class="bi bi-sliders"></i> 系统配置</a></li>
+        </ul>
+        <div class="position-absolute bottom-0 w-100 p-3 border-top border-secondary">
+            <a href="/" class="btn btn-outline-light btn-sm w-100"><i class="bi bi-house"></i> 返回前台</a>
+        </div>
+    </nav>
+
+    <main class="main-content">
+        <div class="d-flex justify-content-between align-items-center mb-4">
+            <h4><i class="bi bi-credit-card"></i> 会员套餐配置</h4>
+            <div>
+                <a href="{{ url_for('admin.user_limits_settings') }}" class="btn btn-outline-primary">
+                    <i class="bi bi-sliders"></i> 用户权限配置
+                </a>
+                <a href="{{ url_for('admin.settings') }}" class="btn btn-outline-secondary">
+                    <i class="bi bi-gear"></i> 基础设置
+                </a>
+            </div>
+        </div>
+
+        <form id="membershipForm">
+            <div class="row">
+                {% for plan_key, plan in plans_config.items() %}
+                <div class="col-md-4 mb-4">
+                    <div class="card plan-card {% if plan_key == 'vip_basic' %}basic{% elif plan_key == 'vip_pro' %}pro{% else %}enterprise{% endif %}">
+                        <div class="card-body">
+                            <div class="mb-3">
+                                <label class="form-label">套餐名称</label>
+                                <input type="text" class="form-control" name="{{ plan_key }}_name" value="{{ plan.name }}">
+                            </div>
+                            
+                            <div class="row">
+                                <div class="col-6">
+                                    <div class="mb-3">
+                                        <label class="form-label">价格 (元)</label>
+                                        <input type="number" class="form-control" name="{{ plan_key }}_price" 
+                                            step="0.01" value="{{ plan.price }}">
+                                    </div>
+                                </div>
+                                <div class="col-6">
+                                    <div class="mb-3">
+                                        <label class="form-label">周期</label>
+                                        <select class="form-select" name="{{ plan_key }}_period">
+                                            <option value="month" {% if plan.period == 'month' %}selected{% endif %}>月</option>
+                                            <option value="quarter" {% if plan.period == 'quarter' %}selected{% endif %}>季</option>
+                                            <option value="year" {% if plan.period == 'year' %}selected{% endif %}>年</option>
+                                        </select>
+                                    </div>
+                                </div>
+                            </div>
+                            
+                            <div class="mb-3">
+                                <label class="form-label">描述</label>
+                                <textarea class="form-control" name="{{ plan_key }}_description" rows="2">{{ plan.description }}</textarea>
+                            </div>
+                            
+                            <div class="text-muted small">
+                                <strong>默认:</strong> {{ default_plans.get(plan_key, {}).get('name', '') }} - 
+                                ¥{{ default_plans.get(plan_key, {}).get('price', 0) }}/{{ default_plans.get(plan_key, {}).get('period', 'month') }}
+                            </div>
+                        </div>
+                    </div>
+                </div>
+                {% endfor %}
+            </div>
+
+            <div class="card">
+                <div class="card-body">
+                    <button type="submit" class="btn btn-primary">
+                        <i class="bi bi-check-circle"></i> 保存配置
+                    </button>
+                    <a href="{{ url_for('admin.packages') }}" class="btn btn-success">
+                        <i class="bi bi-box-seam"></i> 管理数据包套餐
+                    </a>
+                </div>
+            </div>
+        </form>
+    </main>
+
+    <script>
+        const defaultPlans = {{ default_plans | tojson }};
+        
+        document.getElementById('membershipForm').addEventListener('submit', function(e) {
+            e.preventDefault();
+            
+            const formData = new FormData(this);
+            const data = {};
+            
+            {% for plan_key in plans_config.keys() %}
+            data['{{ plan_key }}'] = {
+                name: formData.get('{{ plan_key }}_name'),
+                price: parseFloat(formData.get('{{ plan_key }}_price')),
+                period: formData.get('{{ plan_key }}_period'),
+                description: formData.get('{{ plan_key }}_description')
+            };
+            {% endfor %}
+            
+            fetch('/admin/settings/membership', {
+                method: 'POST',
+                headers: {'Content-Type': 'application/json'},
+                body: JSON.stringify(data)
+            })
+            .then(r => r.json())
+            .then(result => {
+                if (result.success) {
+                    alert('配置已保存');
+                } else {
+                    alert('保存失败: ' + result.error);
+                }
+            });
+        });
+    </script>
+</body>
+</html>
\ No newline at end of file
diff --git a/templates/admin/package_form.html b/templates/admin/package_form.html
new file mode 100644
index 0000000..e57fcf1
--- /dev/null
+++ b/templates/admin/package_form.html
@@ -0,0 +1,158 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <title>{% if package %}编辑套餐{% else %}添加套餐{% endif %} - 后台管理</title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.0/font/bootstrap-icons.css" rel="stylesheet">
+    <style>
+        body { background-color: #f5f5f5; }
+        .sidebar { position: fixed; top: 0; left: 0; height: 100vh; width: 250px; background: #343a40; padding-top: 60px; }
+        .sidebar .nav-link { color: #adb5bd; padding: 12px 20px; }
+        .sidebar .nav-link:hover { color: #fff; background: rgba(255,255,255,0.1); }
+        .main-content { margin-left: 250px; padding: 20px; }
+    </style>
+</head>
+<body>
+    <nav class="sidebar">
+        <div class="position-absolute top-0 w-100 p-3 border-bottom border-secondary">
+            <h5 class="text-white mb-0"><i class="bi bi-gear-fill"></i> 后台管理</h5>
+        </div>
+        <ul class="nav flex-column">
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.dashboard') }}"><i class="bi bi-speedometer2"></i> 数据概览</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.users') }}"><i class="bi bi-people"></i> 用户管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.translations') }}"><i class="bi bi-file-text"></i> 翻译记录</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.cache_list') }}"><i class="bi bi-database"></i> 缓存管理</a></li>
+            <li class="nav-item"><a class="nav-link active" href="{{ url_for('admin.packages') }}"><i class="bi bi-box-seam"></i> 数据包套餐</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.stats') }}"><i class="bi bi-bar-chart"></i> 统计报表</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.logs') }}"><i class="bi bi-list-check"></i> 操作日志</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.settings') }}"><i class="bi bi-sliders"></i> 系统配置</a></li>
+        </ul>
+        <div class="position-absolute bottom-0 w-100 p-3 border-top border-secondary">
+            <a href="/" class="btn btn-outline-light btn-sm w-100"><i class="bi bi-house"></i> 返回前台</a>
+        </div>
+    </nav>
+
+    <main class="main-content">
+        <div class="card">
+            <div class="card-header">
+                <h5 class="mb-0">
+                    <i class="bi bi-{% if package %}pencil{% else %}plus-circle{% endif %}"></i>
+                    {% if package %}编辑套餐{% else %}添加套餐{% endif %}
+                </h5>
+            </div>
+            <div class="card-body">
+                <form id="packageForm">
+                    <div class="row">
+                        <div class="col-md-6">
+                            <div class="mb-3">
+                                <label class="form-label">套餐名称 *</label>
+                                <input type="text" class="form-control" name="name" value="{{ package.name or '' }}" required>
+                            </div>
+                            <div class="mb-3">
+                                <label class="form-label">套餐描述</label>
+                                <textarea class="form-control" name="description" rows="2">{{ package.description or '' }}</textarea>
+                            </div>
+                            <div class="row">
+                                <div class="col-6">
+                                    <div class="mb-3">
+                                        <label class="form-label">售价 (元) *</label>
+                                        <input type="number" class="form-control" name="price" step="0.01" value="{{ package.price or 0 }}" required>
+                                    </div>
+                                </div>
+                                <div class="col-6">
+                                    <div class="mb-3">
+                                        <label class="form-label">原价 (元)</label>
+                                        <input type="number" class="form-control" name="original_price" step="0.01" value="{{ package.original_price or '' }}">
+                                    </div>
+                                </div>
+                            </div>
+                        </div>
+                        <div class="col-md-6">
+                            <div class="mb-3">
+                                <label class="form-label">翻译次数 *</label>
+                                <input type="number" class="form-control" name="translation_count" value="{{ package.translation_count or 100 }}">
+                                <small class="text-muted">输入 0 表示无限次数</small>
+                            </div>
+                            <div class="mb-3">
+                                <label class="form-label">有效天数 *</label>
+                                <input type="number" class="form-control" name="valid_days" value="{{ package.valid_days or 30 }}">
+                                <small class="text-muted">输入 0 表示永久有效</small>
+                            </div>
+                            <div class="mb-3">
+                                <label class="form-label">排序</label>
+                                <input type="number" class="form-control" name="sort_order" value="{{ package.sort_order or 0 }}">
+                                <small class="text-muted">数字越小越靠前</small>
+                            </div>
+                        </div>
+                    </div>
+                    
+                    <hr>
+                    
+                    <div class="row">
+                        <div class="col-md-6">
+                            <div class="form-check mb-3">
+                                <input type="checkbox" class="form-check-input" name="is_active" {% if not package or package.is_active %}checked{% endif %}>
+                                <label class="form-check-label">上架销售</label>
+                            </div>
+                        </div>
+                        <div class="col-md-6">
+                            <div class="form-check mb-3">
+                                <input type="checkbox" class="form-check-input" name="is_recommended" {% if package and package.is_recommended %}checked{% endif %}>
+                                <label class="form-check-label">推荐套餐（高亮显示）</label>
+                            </div>
+                        </div>
+                    </div>
+                    
+                    <div class="d-flex gap-2">
+                        <button type="submit" class="btn btn-primary">
+                            <i class="bi bi-check-circle"></i> 保存
+                        </button>
+                        <a href="{{ url_for('admin.packages') }}" class="btn btn-outline-secondary">取消</a>
+                    </div>
+                </form>
+            </div>
+        </div>
+    </main>
+
+    <script>
+        document.getElementById('packageForm').addEventListener('submit', function(e) {
+            e.preventDefault();
+            
+            const formData = new FormData(this);
+            const data = {
+                name: formData.get('name'),
+                description: formData.get('description'),
+                price: parseFloat(formData.get('price')),
+                original_price: formData.get('original_price') ? parseFloat(formData.get('original_price')) : null,
+                translation_count: parseInt(formData.get('translation_count')),
+                valid_days: parseInt(formData.get('valid_days')),
+                sort_order: parseInt(formData.get('sort_order')),
+                is_active: formData.get('is_active') === 'on',
+                is_recommended: formData.get('is_recommended') === 'on'
+            };
+            
+            {% if package %}
+            const url = '/admin/package/{{ package.id }}/edit';
+            {% else %}
+            const url = '/admin/package/add';
+            {% endif %}
+            
+            fetch(url, {
+                method: 'POST',
+                headers: {'Content-Type': 'application/json'},
+                body: JSON.stringify(data)
+            })
+            .then(r => r.json())
+            .then(result => {
+                if (result.success) {
+                    alert('保存成功');
+                    window.location.href = '/admin/packages';
+                } else {
+                    alert('保存失败: ' + (result.error || '未知错误'));
+                }
+            });
+        });
+    </script>
+</body>
+</html>
\ No newline at end of file
diff --git a/templates/admin/packages.html b/templates/admin/packages.html
new file mode 100644
index 0000000..b0b347a
--- /dev/null
+++ b/templates/admin/packages.html
@@ -0,0 +1,124 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <title>数据包套餐 - 后台管理</title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.0/font/bootstrap-icons.css" rel="stylesheet">
+    <style>
+        body { background-color: #f5f5f5; }
+        .sidebar { position: fixed; top: 0; left: 0; height: 100vh; width: 250px; background: #343a40; padding-top: 60px; }
+        .sidebar .nav-link { color: #adb5bd; padding: 12px 20px; border-left: 3px solid transparent; }
+        .sidebar .nav-link:hover, .sidebar .nav-link.active { color: #fff; background: rgba(255,255,255,0.1); border-left-color: #0d6efd; }
+        .sidebar .nav-link i { margin-right: 10px; }
+        .main-content { margin-left: 250px; padding: 20px; }
+        .package-card { transition: all 0.3s; }
+        .package-card:hover { transform: translateY(-3px); box-shadow: 0 5px 20px rgba(0,0,0,0.1); }
+        .package-card.recommended { border: 2px solid #ffc107; }
+    </style>
+</head>
+<body>
+    <nav class="sidebar">
+        <div class="position-absolute top-0 w-100 p-3 border-bottom border-secondary">
+            <h5 class="text-white mb-0"><i class="bi bi-gear-fill"></i> 后台管理</h5>
+        </div>
+        <ul class="nav flex-column">
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.dashboard') }}"><i class="bi bi-speedometer2"></i> 数据概览</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.users') }}"><i class="bi bi-people"></i> 用户管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.translations') }}"><i class="bi bi-file-text"></i> 翻译记录</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.cache_list') }}"><i class="bi bi-database"></i> 缓存管理</a></li>
+            <li class="nav-item"><a class="nav-link active" href="{{ url_for('admin.packages') }}"><i class="bi bi-box-seam"></i> 数据包套餐</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.stats') }}"><i class="bi bi-bar-chart"></i> 统计报表</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.logs') }}"><i class="bi bi-list-check"></i> 操作日志</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.settings') }}"><i class="bi bi-sliders"></i> 系统配置</a></li>
+        </ul>
+        <div class="position-absolute bottom-0 w-100 p-3 border-top border-secondary">
+            <a href="/" class="btn btn-outline-light btn-sm w-100"><i class="bi bi-house"></i> 返回前台</a>
+        </div>
+    </nav>
+
+    <main class="main-content">
+        <div class="d-flex justify-content-between align-items-center mb-4">
+            <h4><i class="bi bi-box-seam"></i> 数据包套餐管理</h4>
+            <a href="{{ url_for('admin.add_package') }}" class="btn btn-primary">
+                <i class="bi bi-plus-circle"></i> 添加套餐
+            </a>
+        </div>
+
+        <div class="row">
+            {% for pkg in packages %}
+            <div class="col-md-4 mb-4">
+                <div class="card package-card {% if pkg.is_recommended %}recommended{% endif %}">
+                    {% if pkg.is_recommended %}
+                    <div class="card-header bg-warning text-dark text-center py-1">
+                        <small><i class="bi bi-star-fill"></i> 推荐套餐</small>
+                    </div>
+                    {% endif %}
+                    <div class="card-body">
+                        <h5 class="card-title">{{ pkg.name }}</h5>
+                        <p class="text-muted small">{{ pkg.description or '暂无描述' }}</p>
+                        
+                        <div class="d-flex align-items-baseline mb-3">
+                            <span class="fs-3 text-danger fw-bold">¥{{ pkg.price }}</span>
+                            {% if pkg.original_price %}
+                            <span class="text-muted text-decoration-line-through ms-2">¥{{ pkg.original_price }}</span>
+                            {% endif %}
+                        </div>
+                        
+                        <ul class="list-unstyled">
+                            <li><i class="bi bi-check-circle text-success"></i> 翻译次数: 
+                                {% if pkg.translation_count > 0 %}{{ pkg.translation_count }}次{% else %}<strong>无限</strong>{% endif %}
+                            </li>
+                            <li><i class="bi bi-check-circle text-success"></i> 有效期: 
+                                {% if pkg.valid_days > 0 %}{{ pkg.valid_days }}天{% else %}永久{% endif %}
+                            </li>
+                        </ul>
+                        
+                        <div class="d-flex gap-2 mt-3">
+                            <a href="{{ url_for('admin.edit_package', package_id=pkg.id) }}" class="btn btn-outline-primary btn-sm flex-fill">
+                                <i class="bi bi-pencil"></i> 编辑
+                            </a>
+                            <button class="btn btn-outline-{% if pkg.is_active %}warning{% else %}success{% endif %} btn-sm" onclick="togglePackage({{ pkg.id }})">
+                                <i class="bi bi-{% if pkg.is_active %}pause{% else %}play{% endif %}-circle"></i> 
+                                {% if pkg.is_active %}下架{% else %}上架{% endif %}
+                            </button>
+                            <button class="btn btn-outline-danger btn-sm" onclick="deletePackage({{ pkg.id }})">
+                                <i class="bi bi-trash"></i>
+                            </button>
+                        </div>
+                    </div>
+                    <div class="card-footer text-center">
+                        {% if pkg.is_active %}
+                        <span class="badge bg-success">已上架</span>
+                        {% else %}
+                        <span class="badge bg-secondary">已下架</span>
+                        {% endif %}
+                    </div>
+                </div>
+            </div>
+            {% else %}
+            <div class="col-12">
+                <div class="alert alert-info text-center">
+                    <i class="bi bi-info-circle"></i> 暂无数据包套餐，点击右上角添加
+                </div>
+            </div>
+            {% endfor %}
+        </div>
+    </main>
+
+    <script>
+        function togglePackage(id) {
+            fetch(`/admin/package/${id}/toggle`, { method: 'POST' })
+                .then(r => r.json())
+                .then(d => { if (d.success) location.reload(); });
+        }
+        
+        function deletePackage(id) {
+            if (!confirm('确定删除此套餐？')) return;
+            fetch(`/admin/package/${id}/delete`, { method: 'POST' })
+                .then(r => r.json())
+                .then(d => { if (d.success) location.reload(); });
+        }
+    </script>
+</body>
+</html>
\ No newline at end of file
diff --git a/templates/admin/settings.html b/templates/admin/settings.html
new file mode 100644
index 0000000..a0ab377
--- /dev/null
+++ b/templates/admin/settings.html
@@ -0,0 +1,114 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <title>系统配置 - 后台管理</title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.0/font/bootstrap-icons.css" rel="stylesheet">
+    <style>
+        body { background-color: #f5f5f5; }
+        .sidebar { position: fixed; top: 0; left: 0; height: 100vh; width: 250px; background: #343a40; padding-top: 60px; }
+        .sidebar .nav-link { color: #adb5bd; padding: 12px 20px; }
+        .sidebar .nav-link:hover, .sidebar .nav-link.active { color: #fff; background: rgba(255,255,255,0.1); }
+        .main-content { margin-left: 250px; padding: 20px; }
+    </style>
+</head>
+<body>
+    <nav class="sidebar">
+        <div class="position-absolute top-0 w-100 p-3 border-bottom border-secondary">
+            <h5 class="text-white mb-0"><i class="bi bi-gear-fill"></i> 后台管理</h5>
+        </div>
+        <ul class="nav flex-column">
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.dashboard') }}"><i class="bi bi-speedometer2"></i> 数据概览</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.users') }}"><i class="bi bi-people"></i> 用户管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.translations') }}"><i class="bi bi-file-text"></i> 翻译记录</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.cache_list') }}"><i class="bi bi-database"></i> 缓存管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.stats') }}"><i class="bi bi-bar-chart"></i> 统计报表</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.logs') }}"><i class="bi bi-list-check"></i> 操作日志</a></li>
+            <li class="nav-item"><a class="nav-link active" href="{{ url_for('admin.settings') }}"><i class="bi bi-sliders"></i> 系统配置</a></li>
+        </ul>
+        <div class="position-absolute bottom-0 w-100 p-3 border-top border-secondary">
+            <a href="/" class="btn btn-outline-light btn-sm w-100"><i class="bi bi-house"></i> 返回前台</a>
+        </div>
+    </nav>
+
+    <main class="main-content">
+        <div class="row">
+            <div class="col-md-6">
+                <div class="card">
+                    <div class="card-header"><h6 class="mb-0"><i class="bi bi-sliders"></i> 用户权限配置</h6></div>
+                    <div class="card-body">
+                        <table class="table table-sm">
+                            <thead class="table-light">
+                                <tr>
+                                    <th>用户类型</th>
+                                    <th>每日次数</th>
+                                    <th>最大页数</th>
+                                </tr>
+                            </thead>
+                            <tbody>
+                                {% for type, limits in user_limits.items() %}
+                                <tr>
+                                    <td>{{ type }}</td>
+                                    <td>{{ limits.daily_translations if limits.daily_translations > 0 else '无限' }}</td>
+                                    <td>{{ limits.max_pages if limits.max_pages > 0 else '无限' }}</td>
+                                </tr>
+                                {% endfor %}
+                            </tbody>
+                        </table>
+                        <small class="text-muted">权限配置需修改 config.py 文件</small>
+                    </div>
+                </div>
+            </div>
+
+            <div class="col-md-6">
+                <div class="card">
+                    <div class="card-header"><h6 class="mb-0"><i class="bi bi-credit-card"></i> 会员套餐配置</h6></div>
+                    <div class="card-body">
+                        <table class="table table-sm">
+                            <thead class="table-light">
+                                <tr>
+                                    <th>套餐</th>
+                                    <th>价格</th>
+                                    <th>周期</th>
+                                </tr>
+                            </thead>
+                            <tbody>
+                                {% for key, plan in membership_plans.items() %}
+                                <tr>
+                                    <td>{{ plan.name }}</td>
+                                    <td>¥{{ plan.price }}</td>
+                                    <td>{{ plan.period }}</td>
+                                </tr>
+                                {% endfor %}
+                            </tbody>
+                        </table>
+                        <small class="text-muted">套餐配置需修改 config.py 文件</small>
+                    </div>
+                </div>
+            </div>
+        </div>
+
+        <div class="card mt-3">
+            <div class="card-header"><h6 class="mb-0"><i class="bi bi-info-circle"></i> 系统信息</h6></div>
+            <div class="card-body">
+                <div class="row">
+                    <div class="col-md-4">
+                        <p><strong>应用名称:</strong> PDF翻译助手</p>
+                        <p><strong>版本:</strong> 1.0.0</p>
+                        <p><strong>框架:</strong> Flask + SQLAlchemy</p>
+                    </div>
+                    <div class="col-md-4">
+                        <p><strong>LLM模型:</strong> qwen/qwen3.5-35b-a3b</p>
+                        <p><strong>API地址:</strong> http://192.168.2.5:1234/v1</p>
+                    </div>
+                    <div class="col-md-4">
+                        <p><strong>缓存有效期:</strong> 30天</p>
+                        <p><strong>最大文件:</strong> 50MB</p>
+                    </div>
+                </div>
+            </div>
+        </div>
+    </main>
+</body>
+</html>
\ No newline at end of file
diff --git a/templates/admin/stats.html b/templates/admin/stats.html
new file mode 100644
index 0000000..7df0e63
--- /dev/null
+++ b/templates/admin/stats.html
@@ -0,0 +1,160 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <title>统计报表 - 后台管理</title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.0/font/bootstrap-icons.css" rel="stylesheet">
+    <script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
+    <style>
+        body { background-color: #f5f5f5; }
+        .sidebar { position: fixed; top: 0; left: 0; height: 100vh; width: 250px; background: #343a40; padding-top: 60px; }
+        .sidebar .nav-link { color: #adb5bd; padding: 12px 20px; }
+        .sidebar .nav-link:hover, .sidebar .nav-link.active { color: #fff; background: rgba(255,255,255,0.1); }
+        .main-content { margin-left: 250px; padding: 20px; }
+    </style>
+</head>
+<body>
+    <nav class="sidebar">
+        <div class="position-absolute top-0 w-100 p-3 border-bottom border-secondary">
+            <h5 class="text-white mb-0"><i class="bi bi-gear-fill"></i> 后台管理</h5>
+        </div>
+        <ul class="nav flex-column">
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.dashboard') }}"><i class="bi bi-speedometer2"></i> 数据概览</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.users') }}"><i class="bi bi-people"></i> 用户管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.translations') }}"><i class="bi bi-file-text"></i> 翻译记录</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.cache_list') }}"><i class="bi bi-database"></i> 缓存管理</a></li>
+            <li class="nav-item"><a class="nav-link active" href="{{ url_for('admin.stats') }}"><i class="bi bi-bar-chart"></i> 统计报表</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.logs') }}"><i class="bi bi-list-check"></i> 操作日志</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.settings') }}"><i class="bi bi-sliders"></i> 系统配置</a></li>
+        </ul>
+        <div class="position-absolute bottom-0 w-100 p-3 border-top border-secondary">
+            <a href="/" class="btn btn-outline-light btn-sm w-100"><i class="bi bi-house"></i> 返回前台</a>
+        </div>
+    </nav>
+
+    <main class="main-content">
+        <div class="row mb-4">
+            <!-- 用户增长趋势 -->
+            <div class="col-md-6">
+                <div class="card">
+                    <div class="card-header"><h6 class="mb-0"><i class="bi bi-people"></i> 用户增长趋势（30天）</h6></div>
+                    <div class="card-body">
+                        <canvas id="userChart" height="150"></canvas>
+                    </div>
+                </div>
+            </div>
+            <!-- 翻译量趋势 -->
+            <div class="col-md-6">
+                <div class="card">
+                    <div class="card-header"><h6 class="mb-0"><i class="bi bi-file-text"></i> 翻译量趋势（30天）</h6></div>
+                    <div class="card-body">
+                        <canvas id="transChart" height="150"></canvas>
+                    </div>
+                </div>
+            </div>
+        </div>
+
+        <div class="row mb-4">
+            <!-- 用户类型分布 -->
+            <div class="col-md-4">
+                <div class="card">
+                    <div class="card-header"><h6 class="mb-0"><i class="bi bi-pie-chart"></i> 用户类型分布</h6></div>
+                    <div class="card-body">
+                        <canvas id="userTypeChart" height="200"></canvas>
+                    </div>
+                </div>
+            </div>
+            <!-- 翻译状态分布 -->
+            <div class="col-md-4">
+                <div class="card">
+                    <div class="card-header"><h6 class="mb-0"><i class="bi bi-pie-chart"></i> 翻译状态分布</h6></div>
+                    <div class="card-body">
+                        <canvas id="statusChart" height="200"></canvas>
+                    </div>
+                </div>
+            </div>
+            <!-- Top用户 -->
+            <div class="col-md-4">
+                <div class="card">
+                    <div class="card-header"><h6 class="mb-0"><i class="bi bi-trophy"></i> 活跃用户Top10</h6></div>
+                    <div class="card-body p-0">
+                        <table class="table table-sm mb-0">
+                            <thead class="table-light">
+                                <tr><th>排名</th><th>用户</th><th>翻译数</th></tr>
+                            </thead>
+                            <tbody>
+                                {% for name, count in top_users %}
+                                <tr>
+                                    <td>{{ loop.index }}</td>
+                                    <td>{{ name }}</td>
+                                    <td><span class="badge bg-primary">{{ count }}</span></td>
+                                </tr>
+                                {% else %}
+                                <tr><td colspan="3" class="text-center text-muted">暂无数据</td></tr>
+                                {% endfor %}
+                            </tbody>
+                        </table>
+                    </div>
+                </div>
+            </div>
+        </div>
+    </main>
+
+    <script>
+        // 用户增长趋势
+        new Chart(document.getElementById('userChart'), {
+            type: 'line',
+            data: {
+                labels: {{ user_growth | map(attribute='date') | list | tojson }},
+                datasets: [{
+                    label: '新增用户',
+                    data: {{ user_growth | map(attribute='count') | list | tojson }},
+                    borderColor: '#0d6efd',
+                    backgroundColor: 'rgba(13, 110, 253, 0.1)',
+                    fill: true, tension: 0.3
+                }]
+            },
+            options: { responsive: true, plugins: { legend: { display: false } } }
+        });
+
+        // 翻译量趋势
+        new Chart(document.getElementById('transChart'), {
+            type: 'bar',
+            data: {
+                labels: {{ translation_growth | map(attribute='date') | list | tojson }},
+                datasets: [{
+                    label: '翻译次数',
+                    data: {{ translation_growth | map(attribute='count') | list | tojson }},
+                    backgroundColor: 'rgba(25, 135, 84, 0.7)'
+                }]
+            },
+            options: { responsive: true, plugins: { legend: { display: false } } }
+        });
+
+        // 用户类型分布
+        new Chart(document.getElementById('userTypeChart'), {
+            type: 'doughnut',
+            data: {
+                labels: {{ user_distribution | map(attribute=0) | list | tojson }},
+                datasets: [{
+                    data: {{ user_distribution | map(attribute=1) | list | tojson }},
+                    backgroundColor: ['#6c757d', '#ffc107', '#fd7e14', '#0d6efd', '#198754']
+                }]
+            }
+        });
+
+        // 翻译状态分布
+        new Chart(document.getElementById('statusChart'), {
+            type: 'doughnut',
+            data: {
+                labels: {{ status_distribution | map(attribute=0) | list | tojson }},
+                datasets: [{
+                    data: {{ status_distribution | map(attribute=1) | list | tojson }},
+                    backgroundColor: ['#198754', '#ffc107', '#dc3545', '#6c757d']
+                }]
+            }
+        });
+    </script>
+</body>
+</html>
\ No newline at end of file
diff --git a/templates/admin/stats.html.bak b/templates/admin/stats.html.bak
new file mode 100644
index 0000000..7df0e63
--- /dev/null
+++ b/templates/admin/stats.html.bak
@@ -0,0 +1,160 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <title>统计报表 - 后台管理</title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.0/font/bootstrap-icons.css" rel="stylesheet">
+    <script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
+    <style>
+        body { background-color: #f5f5f5; }
+        .sidebar { position: fixed; top: 0; left: 0; height: 100vh; width: 250px; background: #343a40; padding-top: 60px; }
+        .sidebar .nav-link { color: #adb5bd; padding: 12px 20px; }
+        .sidebar .nav-link:hover, .sidebar .nav-link.active { color: #fff; background: rgba(255,255,255,0.1); }
+        .main-content { margin-left: 250px; padding: 20px; }
+    </style>
+</head>
+<body>
+    <nav class="sidebar">
+        <div class="position-absolute top-0 w-100 p-3 border-bottom border-secondary">
+            <h5 class="text-white mb-0"><i class="bi bi-gear-fill"></i> 后台管理</h5>
+        </div>
+        <ul class="nav flex-column">
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.dashboard') }}"><i class="bi bi-speedometer2"></i> 数据概览</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.users') }}"><i class="bi bi-people"></i> 用户管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.translations') }}"><i class="bi bi-file-text"></i> 翻译记录</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.cache_list') }}"><i class="bi bi-database"></i> 缓存管理</a></li>
+            <li class="nav-item"><a class="nav-link active" href="{{ url_for('admin.stats') }}"><i class="bi bi-bar-chart"></i> 统计报表</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.logs') }}"><i class="bi bi-list-check"></i> 操作日志</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.settings') }}"><i class="bi bi-sliders"></i> 系统配置</a></li>
+        </ul>
+        <div class="position-absolute bottom-0 w-100 p-3 border-top border-secondary">
+            <a href="/" class="btn btn-outline-light btn-sm w-100"><i class="bi bi-house"></i> 返回前台</a>
+        </div>
+    </nav>
+
+    <main class="main-content">
+        <div class="row mb-4">
+            <!-- 用户增长趋势 -->
+            <div class="col-md-6">
+                <div class="card">
+                    <div class="card-header"><h6 class="mb-0"><i class="bi bi-people"></i> 用户增长趋势（30天）</h6></div>
+                    <div class="card-body">
+                        <canvas id="userChart" height="150"></canvas>
+                    </div>
+                </div>
+            </div>
+            <!-- 翻译量趋势 -->
+            <div class="col-md-6">
+                <div class="card">
+                    <div class="card-header"><h6 class="mb-0"><i class="bi bi-file-text"></i> 翻译量趋势（30天）</h6></div>
+                    <div class="card-body">
+                        <canvas id="transChart" height="150"></canvas>
+                    </div>
+                </div>
+            </div>
+        </div>
+
+        <div class="row mb-4">
+            <!-- 用户类型分布 -->
+            <div class="col-md-4">
+                <div class="card">
+                    <div class="card-header"><h6 class="mb-0"><i class="bi bi-pie-chart"></i> 用户类型分布</h6></div>
+                    <div class="card-body">
+                        <canvas id="userTypeChart" height="200"></canvas>
+                    </div>
+                </div>
+            </div>
+            <!-- 翻译状态分布 -->
+            <div class="col-md-4">
+                <div class="card">
+                    <div class="card-header"><h6 class="mb-0"><i class="bi bi-pie-chart"></i> 翻译状态分布</h6></div>
+                    <div class="card-body">
+                        <canvas id="statusChart" height="200"></canvas>
+                    </div>
+                </div>
+            </div>
+            <!-- Top用户 -->
+            <div class="col-md-4">
+                <div class="card">
+                    <div class="card-header"><h6 class="mb-0"><i class="bi bi-trophy"></i> 活跃用户Top10</h6></div>
+                    <div class="card-body p-0">
+                        <table class="table table-sm mb-0">
+                            <thead class="table-light">
+                                <tr><th>排名</th><th>用户</th><th>翻译数</th></tr>
+                            </thead>
+                            <tbody>
+                                {% for name, count in top_users %}
+                                <tr>
+                                    <td>{{ loop.index }}</td>
+                                    <td>{{ name }}</td>
+                                    <td><span class="badge bg-primary">{{ count }}</span></td>
+                                </tr>
+                                {% else %}
+                                <tr><td colspan="3" class="text-center text-muted">暂无数据</td></tr>
+                                {% endfor %}
+                            </tbody>
+                        </table>
+                    </div>
+                </div>
+            </div>
+        </div>
+    </main>
+
+    <script>
+        // 用户增长趋势
+        new Chart(document.getElementById('userChart'), {
+            type: 'line',
+            data: {
+                labels: {{ user_growth | map(attribute='date') | list | tojson }},
+                datasets: [{
+                    label: '新增用户',
+                    data: {{ user_growth | map(attribute='count') | list | tojson }},
+                    borderColor: '#0d6efd',
+                    backgroundColor: 'rgba(13, 110, 253, 0.1)',
+                    fill: true, tension: 0.3
+                }]
+            },
+            options: { responsive: true, plugins: { legend: { display: false } } }
+        });
+
+        // 翻译量趋势
+        new Chart(document.getElementById('transChart'), {
+            type: 'bar',
+            data: {
+                labels: {{ translation_growth | map(attribute='date') | list | tojson }},
+                datasets: [{
+                    label: '翻译次数',
+                    data: {{ translation_growth | map(attribute='count') | list | tojson }},
+                    backgroundColor: 'rgba(25, 135, 84, 0.7)'
+                }]
+            },
+            options: { responsive: true, plugins: { legend: { display: false } } }
+        });
+
+        // 用户类型分布
+        new Chart(document.getElementById('userTypeChart'), {
+            type: 'doughnut',
+            data: {
+                labels: {{ user_distribution | map(attribute=0) | list | tojson }},
+                datasets: [{
+                    data: {{ user_distribution | map(attribute=1) | list | tojson }},
+                    backgroundColor: ['#6c757d', '#ffc107', '#fd7e14', '#0d6efd', '#198754']
+                }]
+            }
+        });
+
+        // 翻译状态分布
+        new Chart(document.getElementById('statusChart'), {
+            type: 'doughnut',
+            data: {
+                labels: {{ status_distribution | map(attribute=0) | list | tojson }},
+                datasets: [{
+                    data: {{ status_distribution | map(attribute=1) | list | tojson }},
+                    backgroundColor: ['#198754', '#ffc107', '#dc3545', '#6c757d']
+                }]
+            }
+        });
+    </script>
+</body>
+</html>
\ No newline at end of file
diff --git a/templates/admin/translation_detail.html b/templates/admin/translation_detail.html
new file mode 100644
index 0000000..993d51c
--- /dev/null
+++ b/templates/admin/translation_detail.html
@@ -0,0 +1,113 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <title>翻译详情 - 后台管理</title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.0/font/bootstrap-icons.css" rel="stylesheet">
+    <style>
+        body { background-color: #f5f5f5; }
+        .sidebar { position: fixed; top: 0; left: 0; height: 100vh; width: 250px; background: #343a40; padding-top: 60px; }
+        .sidebar .nav-link { color: #adb5bd; padding: 12px 20px; }
+        .sidebar .nav-link:hover, .sidebar .nav-link.active { color: #fff; background: rgba(255,255,255,0.1); }
+        .main-content { margin-left: 250px; padding: 20px; }
+        .translation-content { max-height: 500px; overflow-y: auto; background: #fff; padding: 20px; border-radius: 5px; }
+    </style>
+</head>
+<body>
+    <nav class="sidebar">
+        <div class="position-absolute top-0 w-100 p-3 border-bottom border-secondary">
+            <h5 class="text-white mb-0"><i class="bi bi-gear-fill"></i> 后台管理</h5>
+        </div>
+        <ul class="nav flex-column">
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.dashboard') }}"><i class="bi bi-speedometer2"></i> 数据概览</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.users') }}"><i class="bi bi-people"></i> 用户管理</a></li>
+            <li class="nav-item"><a class="nav-link active" href="{{ url_for('admin.translations') }}"><i class="bi bi-file-text"></i> 翻译记录</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.cache_list') }}"><i class="bi bi-database"></i> 缓存管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.stats') }}"><i class="bi bi-bar-chart"></i> 统计报表</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.logs') }}"><i class="bi bi-list-check"></i> 操作日志</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.settings') }}"><i class="bi bi-sliders"></i> 系统配置</a></li>
+        </ul>
+        <div class="position-absolute bottom-0 w-100 p-3 border-top border-secondary">
+            <a href="/" class="btn btn-outline-light btn-sm w-100"><i class="bi bi-house"></i> 返回前台</a>
+        </div>
+    </nav>
+
+    <main class="main-content">
+        <div class="card">
+            <div class="card-header d-flex justify-content-between">
+                <h5 class="mb-0"><i class="bi bi-file-text"></i> 翻译详情</h5>
+                <div>
+                    <a href="/api/download/{{ translation.id }}" class="btn btn-success btn-sm">
+                        <i class="bi bi-download"></i> 下载结果
+                    </a>
+                    <a href="{{ url_for('admin.translations') }}" class="btn btn-outline-secondary btn-sm">
+                        返回列表
+                    </a>
+                </div>
+            </div>
+            <div class="card-body">
+                <div class="row mb-3">
+                    <div class="col-md-6">
+                        <p><strong>文件名:</strong> {{ translation.original_filename }}</p>
+                        <p><strong>页数:</strong> {{ translation.page_count }}</p>
+                        <p><strong>大小:</strong> {{ (translation.file_size / 1024)|round(1) }} KB</p>
+                    </div>
+                    <div class="col-md-6">
+                        <p><strong>状态:</strong> 
+                            <span class="badge bg-{% if translation.status == 'completed' %}success{% elif translation.status == 'processing' %}warning{% else %}danger{% endif %}">
+                                {{ translation.status }}
+                            </span>
+                            {% if translation.from_cache %}
+                            <span class="badge bg-info">来自缓存</span>
+                            {% endif %}
+                        </p>
+                        <p><strong>用户:</strong> {% if user %}{{ user.username }}{% else %}访客{% endif %}</p>
+                        <p><strong>时间:</strong> {{ translation.created_at.strftime('%Y-%m-%d %H:%M:%S') }}</p>
+                    </div>
+                </div>
+
+                {% if translation.status == 'completed' %}
+                <hr>
+                <h6>翻译结果</h6>
+                <div id="resultContent" class="translation-content border">
+                    加载中...
+                </div>
+                {% elif translation.status == 'failed' %}
+                <div class="alert alert-danger">
+                    <strong>错误信息:</strong> {{ translation.error_message or '未知错误' }}
+                </div>
+                {% endif %}
+
+                {% if translation.translate_params %}
+                <hr>
+                <h6>翻译参数</h6>
+                <pre class="bg-light p-2 rounded">{{ translation.translate_params }}</pre>
+                {% endif %}
+            </div>
+        </div>
+    </main>
+
+    <script>
+        // 加载翻译结果
+        fetch('/api/result/{{ translation.id }}')
+            .then(r => r.json())
+            .then(data => {
+                if (data.content) {
+                    // 简单Markdown渲染
+                    let html = data.content
+                        .replace(/^## (.*)$/gm, '<h3>$1</h3>')
+                        .replace(/^# (.*)$/gm, '<h2>$1</h2>')
+                        .replace(/^---$/gm, '<hr>')
+                        .replace(/\n\n/g, '</p><p>');
+                    document.getElementById('resultContent').innerHTML = '<p>' + html + '</p>';
+                } else {
+                    document.getElementById('resultContent').innerHTML = '<p class="text-muted">无翻译结果</p>';
+                }
+            })
+            .catch(err => {
+                document.getElementById('resultContent').innerHTML = '<p class="text-danger">加载失败: ' + err + '</p>';
+            });
+    </script>
+</body>
+</html>
\ No newline at end of file
diff --git a/templates/admin/translation_detail.html.bak b/templates/admin/translation_detail.html.bak
new file mode 100644
index 0000000..993d51c
--- /dev/null
+++ b/templates/admin/translation_detail.html.bak
@@ -0,0 +1,113 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <title>翻译详情 - 后台管理</title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.0/font/bootstrap-icons.css" rel="stylesheet">
+    <style>
+        body { background-color: #f5f5f5; }
+        .sidebar { position: fixed; top: 0; left: 0; height: 100vh; width: 250px; background: #343a40; padding-top: 60px; }
+        .sidebar .nav-link { color: #adb5bd; padding: 12px 20px; }
+        .sidebar .nav-link:hover, .sidebar .nav-link.active { color: #fff; background: rgba(255,255,255,0.1); }
+        .main-content { margin-left: 250px; padding: 20px; }
+        .translation-content { max-height: 500px; overflow-y: auto; background: #fff; padding: 20px; border-radius: 5px; }
+    </style>
+</head>
+<body>
+    <nav class="sidebar">
+        <div class="position-absolute top-0 w-100 p-3 border-bottom border-secondary">
+            <h5 class="text-white mb-0"><i class="bi bi-gear-fill"></i> 后台管理</h5>
+        </div>
+        <ul class="nav flex-column">
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.dashboard') }}"><i class="bi bi-speedometer2"></i> 数据概览</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.users') }}"><i class="bi bi-people"></i> 用户管理</a></li>
+            <li class="nav-item"><a class="nav-link active" href="{{ url_for('admin.translations') }}"><i class="bi bi-file-text"></i> 翻译记录</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.cache_list') }}"><i class="bi bi-database"></i> 缓存管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.stats') }}"><i class="bi bi-bar-chart"></i> 统计报表</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.logs') }}"><i class="bi bi-list-check"></i> 操作日志</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.settings') }}"><i class="bi bi-sliders"></i> 系统配置</a></li>
+        </ul>
+        <div class="position-absolute bottom-0 w-100 p-3 border-top border-secondary">
+            <a href="/" class="btn btn-outline-light btn-sm w-100"><i class="bi bi-house"></i> 返回前台</a>
+        </div>
+    </nav>
+
+    <main class="main-content">
+        <div class="card">
+            <div class="card-header d-flex justify-content-between">
+                <h5 class="mb-0"><i class="bi bi-file-text"></i> 翻译详情</h5>
+                <div>
+                    <a href="/api/download/{{ translation.id }}" class="btn btn-success btn-sm">
+                        <i class="bi bi-download"></i> 下载结果
+                    </a>
+                    <a href="{{ url_for('admin.translations') }}" class="btn btn-outline-secondary btn-sm">
+                        返回列表
+                    </a>
+                </div>
+            </div>
+            <div class="card-body">
+                <div class="row mb-3">
+                    <div class="col-md-6">
+                        <p><strong>文件名:</strong> {{ translation.original_filename }}</p>
+                        <p><strong>页数:</strong> {{ translation.page_count }}</p>
+                        <p><strong>大小:</strong> {{ (translation.file_size / 1024)|round(1) }} KB</p>
+                    </div>
+                    <div class="col-md-6">
+                        <p><strong>状态:</strong> 
+                            <span class="badge bg-{% if translation.status == 'completed' %}success{% elif translation.status == 'processing' %}warning{% else %}danger{% endif %}">
+                                {{ translation.status }}
+                            </span>
+                            {% if translation.from_cache %}
+                            <span class="badge bg-info">来自缓存</span>
+                            {% endif %}
+                        </p>
+                        <p><strong>用户:</strong> {% if user %}{{ user.username }}{% else %}访客{% endif %}</p>
+                        <p><strong>时间:</strong> {{ translation.created_at.strftime('%Y-%m-%d %H:%M:%S') }}</p>
+                    </div>
+                </div>
+
+                {% if translation.status == 'completed' %}
+                <hr>
+                <h6>翻译结果</h6>
+                <div id="resultContent" class="translation-content border">
+                    加载中...
+                </div>
+                {% elif translation.status == 'failed' %}
+                <div class="alert alert-danger">
+                    <strong>错误信息:</strong> {{ translation.error_message or '未知错误' }}
+                </div>
+                {% endif %}
+
+                {% if translation.translate_params %}
+                <hr>
+                <h6>翻译参数</h6>
+                <pre class="bg-light p-2 rounded">{{ translation.translate_params }}</pre>
+                {% endif %}
+            </div>
+        </div>
+    </main>
+
+    <script>
+        // 加载翻译结果
+        fetch('/api/result/{{ translation.id }}')
+            .then(r => r.json())
+            .then(data => {
+                if (data.content) {
+                    // 简单Markdown渲染
+                    let html = data.content
+                        .replace(/^## (.*)$/gm, '<h3>$1</h3>')
+                        .replace(/^# (.*)$/gm, '<h2>$1</h2>')
+                        .replace(/^---$/gm, '<hr>')
+                        .replace(/\n\n/g, '</p><p>');
+                    document.getElementById('resultContent').innerHTML = '<p>' + html + '</p>';
+                } else {
+                    document.getElementById('resultContent').innerHTML = '<p class="text-muted">无翻译结果</p>';
+                }
+            })
+            .catch(err => {
+                document.getElementById('resultContent').innerHTML = '<p class="text-danger">加载失败: ' + err + '</p>';
+            });
+    </script>
+</body>
+</html>
\ No newline at end of file
diff --git a/templates/admin/translations.html b/templates/admin/translations.html
new file mode 100644
index 0000000..fa8213f
--- /dev/null
+++ b/templates/admin/translations.html
@@ -0,0 +1,122 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <title>翻译记录 - 后台管理</title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.0/font/bootstrap-icons.css" rel="stylesheet">
+    <style>
+        body { background-color: #f5f5f5; }
+        .sidebar { position: fixed; top: 0; left: 0; height: 100vh; width: 250px; background: #343a40; padding-top: 60px; }
+        .sidebar .nav-link { color: #adb5bd; padding: 12px 20px; }
+        .sidebar .nav-link:hover, .sidebar .nav-link.active { color: #fff; background: rgba(255,255,255,0.1); }
+        .sidebar .nav-link i { margin-right: 10px; }
+        .main-content { margin-left: 250px; padding: 20px; }
+    </style>
+</head>
+<body>
+    <nav class="sidebar">
+        <div class="position-absolute top-0 w-100 p-3 border-bottom border-secondary">
+            <h5 class="text-white mb-0"><i class="bi bi-gear-fill"></i> 后台管理</h5>
+        </div>
+        <ul class="nav flex-column">
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.dashboard') }}"><i class="bi bi-speedometer2"></i> 数据概览</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.users') }}"><i class="bi bi-people"></i> 用户管理</a></li>
+            <li class="nav-item"><a class="nav-link active" href="{{ url_for('admin.translations') }}"><i class="bi bi-file-text"></i> 翻译记录</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.cache_list') }}"><i class="bi bi-database"></i> 缓存管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.stats') }}"><i class="bi bi-bar-chart"></i> 统计报表</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.logs') }}"><i class="bi bi-list-check"></i> 操作日志</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.settings') }}"><i class="bi bi-sliders"></i> 系统配置</a></li>
+        </ul>
+        <div class="position-absolute bottom-0 w-100 p-3 border-top border-secondary">
+            <a href="/" class="btn btn-outline-light btn-sm w-100"><i class="bi bi-house"></i> 返回前台</a>
+        </div>
+    </nav>
+
+    <main class="main-content">
+        <div class="card">
+            <div class="card-header">
+                <div class="row align-items-center">
+                    <div class="col"><h5 class="mb-0"><i class="bi bi-file-text"></i> 翻译记录</h5></div>
+                    <div class="col-auto">
+                        <form method="get" class="d-flex gap-2">
+                            <input type="text" class="form-control" name="search" value="{{ search }}" placeholder="搜索文件名">
+                            <select class="form-select" name="status">
+                                <option value="">全部状态</option>
+                                <option value="pending" {% if status == 'pending' %}selected{% endif %}>等待中</option>
+                                <option value="processing" {% if status == 'processing' %}selected{% endif %}>处理中</option>
+                                <option value="completed" {% if status == 'completed' %}selected{% endif %}>已完成</option>
+                                <option value="failed" {% if status == 'failed' %}selected{% endif %}>失败</option>
+                            </select>
+                            <button class="btn btn-primary"><i class="bi bi-search"></i></button>
+                        </form>
+                    </div>
+                </div>
+            </div>
+            <div class="card-body p-0">
+                <table class="table table-hover mb-0">
+                    <thead class="table-light">
+                        <tr>
+                            <th>ID</th>
+                            <th>文件名</th>
+                            <th>用户</th>
+                            <th>页数</th>
+                            <th>大小</th>
+                            <th>状态</th>
+                            <th>缓存</th>
+                            <th>时间</th>
+                            <th>操作</th>
+                        </tr>
+                    </thead>
+                    <tbody>
+                        {% for t in translations.items %}
+                        <tr>
+                            <td>{{ t.id }}</td>
+                            <td>{{ t.original_filename[:25] }}{% if t.original_filename|length > 25 %}...{% endif %}</td>
+                            <td>{% if t.user_id %}ID:{{ t.user_id }}{% else %}访客{% endif %}</td>
+                            <td>{{ t.page_count }}</td>
+                            <td>{{ (t.file_size / 1024)|round(1) }}KB</td>
+                            <td>
+                                <span class="badge bg-{% if t.status == 'completed' %}success{% elif t.status == 'processing' %}warning{% elif t.status == 'failed' %}danger{% else %}secondary{% endif %}">
+                                    {{ t.status }}
+                                </span>
+                            </td>
+                            <td>{% if t.from_cache %}<i class="bi bi-check-circle text-success"></i>{% else %}-{% endif %}</td>
+                            <td>{{ t.created_at.strftime('%m-%d %H:%M') }}</td>
+                            <td>
+                                <a href="{{ url_for('admin.translation_detail', trans_id=t.id) }}" class="btn btn-sm btn-outline-primary"><i class="bi bi-eye"></i></a>
+                                <button class="btn btn-sm btn-outline-danger" onclick="deleteTrans({{ t.id }})"><i class="bi bi-trash"></i></button>
+                            </td>
+                        </tr>
+                        {% else %}
+                        <tr><td colspan="9" class="text-center text-muted py-4">暂无数据</td></tr>
+                        {% endfor %}
+                    </tbody>
+                </table>
+            </div>
+            <div class="card-footer">
+                <nav>
+                    <ul class="pagination mb-0">
+                        {% if translations.has_prev %}
+                        <li class="page-item"><a class="page-link" href="?page={{ translations.prev_num }}&status={{ status }}&search={{ search }}">上一页</a></li>
+                        {% endif %}
+                        <li class="page-item disabled"><span class="page-link">{{ translations.page }} / {{ translations.pages }}</span></li>
+                        {% if translations.has_next %}
+                        <li class="page-item"><a class="page-link" href="?page={{ translations.next_num }}&status={{ status }}&search={{ search }}">下一页</a></li>
+                        {% endif %}
+                    </ul>
+                </nav>
+            </div>
+        </div>
+    </main>
+
+    <script>
+        function deleteTrans(id) {
+            if (!confirm('确定删除此记录？')) return;
+            fetch(`/admin/translation/${id}/delete`, { method: 'POST' })
+                .then(r => r.json())
+                .then(d => { if (d.success) location.reload(); });
+        }
+    </script>
+</body>
+</html>
\ No newline at end of file
diff --git a/templates/admin/translations.html.bak b/templates/admin/translations.html.bak
new file mode 100644
index 0000000..fa8213f
--- /dev/null
+++ b/templates/admin/translations.html.bak
@@ -0,0 +1,122 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <title>翻译记录 - 后台管理</title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.0/font/bootstrap-icons.css" rel="stylesheet">
+    <style>
+        body { background-color: #f5f5f5; }
+        .sidebar { position: fixed; top: 0; left: 0; height: 100vh; width: 250px; background: #343a40; padding-top: 60px; }
+        .sidebar .nav-link { color: #adb5bd; padding: 12px 20px; }
+        .sidebar .nav-link:hover, .sidebar .nav-link.active { color: #fff; background: rgba(255,255,255,0.1); }
+        .sidebar .nav-link i { margin-right: 10px; }
+        .main-content { margin-left: 250px; padding: 20px; }
+    </style>
+</head>
+<body>
+    <nav class="sidebar">
+        <div class="position-absolute top-0 w-100 p-3 border-bottom border-secondary">
+            <h5 class="text-white mb-0"><i class="bi bi-gear-fill"></i> 后台管理</h5>
+        </div>
+        <ul class="nav flex-column">
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.dashboard') }}"><i class="bi bi-speedometer2"></i> 数据概览</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.users') }}"><i class="bi bi-people"></i> 用户管理</a></li>
+            <li class="nav-item"><a class="nav-link active" href="{{ url_for('admin.translations') }}"><i class="bi bi-file-text"></i> 翻译记录</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.cache_list') }}"><i class="bi bi-database"></i> 缓存管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.stats') }}"><i class="bi bi-bar-chart"></i> 统计报表</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.logs') }}"><i class="bi bi-list-check"></i> 操作日志</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.settings') }}"><i class="bi bi-sliders"></i> 系统配置</a></li>
+        </ul>
+        <div class="position-absolute bottom-0 w-100 p-3 border-top border-secondary">
+            <a href="/" class="btn btn-outline-light btn-sm w-100"><i class="bi bi-house"></i> 返回前台</a>
+        </div>
+    </nav>
+
+    <main class="main-content">
+        <div class="card">
+            <div class="card-header">
+                <div class="row align-items-center">
+                    <div class="col"><h5 class="mb-0"><i class="bi bi-file-text"></i> 翻译记录</h5></div>
+                    <div class="col-auto">
+                        <form method="get" class="d-flex gap-2">
+                            <input type="text" class="form-control" name="search" value="{{ search }}" placeholder="搜索文件名">
+                            <select class="form-select" name="status">
+                                <option value="">全部状态</option>
+                                <option value="pending" {% if status == 'pending' %}selected{% endif %}>等待中</option>
+                                <option value="processing" {% if status == 'processing' %}selected{% endif %}>处理中</option>
+                                <option value="completed" {% if status == 'completed' %}selected{% endif %}>已完成</option>
+                                <option value="failed" {% if status == 'failed' %}selected{% endif %}>失败</option>
+                            </select>
+                            <button class="btn btn-primary"><i class="bi bi-search"></i></button>
+                        </form>
+                    </div>
+                </div>
+            </div>
+            <div class="card-body p-0">
+                <table class="table table-hover mb-0">
+                    <thead class="table-light">
+                        <tr>
+                            <th>ID</th>
+                            <th>文件名</th>
+                            <th>用户</th>
+                            <th>页数</th>
+                            <th>大小</th>
+                            <th>状态</th>
+                            <th>缓存</th>
+                            <th>时间</th>
+                            <th>操作</th>
+                        </tr>
+                    </thead>
+                    <tbody>
+                        {% for t in translations.items %}
+                        <tr>
+                            <td>{{ t.id }}</td>
+                            <td>{{ t.original_filename[:25] }}{% if t.original_filename|length > 25 %}...{% endif %}</td>
+                            <td>{% if t.user_id %}ID:{{ t.user_id }}{% else %}访客{% endif %}</td>
+                            <td>{{ t.page_count }}</td>
+                            <td>{{ (t.file_size / 1024)|round(1) }}KB</td>
+                            <td>
+                                <span class="badge bg-{% if t.status == 'completed' %}success{% elif t.status == 'processing' %}warning{% elif t.status == 'failed' %}danger{% else %}secondary{% endif %}">
+                                    {{ t.status }}
+                                </span>
+                            </td>
+                            <td>{% if t.from_cache %}<i class="bi bi-check-circle text-success"></i>{% else %}-{% endif %}</td>
+                            <td>{{ t.created_at.strftime('%m-%d %H:%M') }}</td>
+                            <td>
+                                <a href="{{ url_for('admin.translation_detail', trans_id=t.id) }}" class="btn btn-sm btn-outline-primary"><i class="bi bi-eye"></i></a>
+                                <button class="btn btn-sm btn-outline-danger" onclick="deleteTrans({{ t.id }})"><i class="bi bi-trash"></i></button>
+                            </td>
+                        </tr>
+                        {% else %}
+                        <tr><td colspan="9" class="text-center text-muted py-4">暂无数据</td></tr>
+                        {% endfor %}
+                    </tbody>
+                </table>
+            </div>
+            <div class="card-footer">
+                <nav>
+                    <ul class="pagination mb-0">
+                        {% if translations.has_prev %}
+                        <li class="page-item"><a class="page-link" href="?page={{ translations.prev_num }}&status={{ status }}&search={{ search }}">上一页</a></li>
+                        {% endif %}
+                        <li class="page-item disabled"><span class="page-link">{{ translations.page }} / {{ translations.pages }}</span></li>
+                        {% if translations.has_next %}
+                        <li class="page-item"><a class="page-link" href="?page={{ translations.next_num }}&status={{ status }}&search={{ search }}">下一页</a></li>
+                        {% endif %}
+                    </ul>
+                </nav>
+            </div>
+        </div>
+    </main>
+
+    <script>
+        function deleteTrans(id) {
+            if (!confirm('确定删除此记录？')) return;
+            fetch(`/admin/translation/${id}/delete`, { method: 'POST' })
+                .then(r => r.json())
+                .then(d => { if (d.success) location.reload(); });
+        }
+    </script>
+</body>
+</html>
\ No newline at end of file
diff --git a/templates/admin/user_detail.html b/templates/admin/user_detail.html
new file mode 100644
index 0000000..8f0973a
--- /dev/null
+++ b/templates/admin/user_detail.html
@@ -0,0 +1,180 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>用户详情 - 后台管理</title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.0/font/bootstrap-icons.css" rel="stylesheet">
+    <style>
+        body { background-color: #f5f5f5; }
+        .sidebar { position: fixed; top: 0; left: 0; height: 100vh; width: 250px; background: #343a40; padding-top: 60px; }
+        .sidebar .nav-link { color: #adb5bd; padding: 12px 20px; }
+        .sidebar .nav-link:hover, .sidebar .nav-link.active { color: #fff; background: rgba(255,255,255,0.1); }
+        .sidebar .nav-link i { margin-right: 10px; }
+        .main-content { margin-left: 250px; padding: 20px; }
+    </style>
+</head>
+<body>
+    <nav class="sidebar">
+        <div class="position-absolute top-0 w-100 p-3 border-bottom border-secondary">
+            <h5 class="text-white mb-0"><i class="bi bi-gear-fill"></i> 后台管理</h5>
+        </div>
+        <ul class="nav flex-column">
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.dashboard') }}"><i class="bi bi-speedometer2"></i> 数据概览</a></li>
+            <li class="nav-item"><a class="nav-link active" href="{{ url_for('admin.users') }}"><i class="bi bi-people"></i> 用户管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.translations') }}"><i class="bi bi-file-text"></i> 翻译记录</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.cache_list') }}"><i class="bi bi-database"></i> 缓存管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.stats') }}"><i class="bi bi-bar-chart"></i> 统计报表</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.logs') }}"><i class="bi bi-list-check"></i> 操作日志</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.settings') }}"><i class="bi bi-sliders"></i> 系统配置</a></li>
+        </ul>
+        <div class="position-absolute bottom-0 w-100 p-3 border-top border-secondary">
+            <a href="/" class="btn btn-outline-light btn-sm w-100"><i class="bi bi-house"></i> 返回前台</a>
+        </div>
+    </nav>
+
+    <main class="main-content">
+        <div class="row">
+            <!-- 用户信息 -->
+            <div class="col-md-4">
+                <div class="card">
+                    <div class="card-header">
+                        <h6 class="mb-0"><i class="bi bi-person"></i> 用户信息</h6>
+                    </div>
+                    <div class="card-body">
+                        <form id="userForm">
+                            <div class="mb-3">
+                                <label class="form-label">用户名</label>
+                                <input type="text" class="form-control" name="username" value="{{ user.username }}">
+                            </div>
+                            <div class="mb-3">
+                                <label class="form-label">邮箱</label>
+                                <input type="email" class="form-control" name="email" value="{{ user.email }}">
+                            </div>
+                            <div class="mb-3">
+                                <label class="form-label">用户类型</label>
+                                <select class="form-select" name="user_type">
+                                    <option value="free" {% if user.user_type == 'free' %}selected{% endif %}>免费用户</option>
+                                    <option value="vip_basic" {% if user.user_type == 'vip_basic' %}selected{% endif %}>基础会员</option>
+                                    <option value="vip_pro" {% if user.user_type == 'vip_pro' %}selected{% endif %}>专业会员</option>
+                                    <option value="vip_enterprise" {% if user.user_type == 'vip_enterprise' %}selected{% endif %}>企业会员</option>
+                                    <option value="admin" {% if user.user_type == 'admin' %}selected{% endif %}>管理员</option>
+                                </select>
+                            </div>
+                            <div class="mb-3">
+                                <label class="form-label">会员到期时间</label>
+                                <input type="datetime-local" class="form-control" name="membership_expire" 
+                                    value="{% if user.membership_expire %}{{ user.membership_expire.strftime('%Y-%m-%dT%H:%M') }}{% endif %}">
+                            </div>
+                            <div class="mb-3">
+                                <label class="form-label">新密码（留空不修改）</label>
+                                <input type="password" class="form-control" name="new_password" placeholder="输入新密码">
+                            </div>
+                            <div class="mb-3 form-check">
+                                <input type="checkbox" class="form-check-input" name="is_active" {% if user.is_active %}checked{% endif %}>
+                                <label class="form-check-label">账号启用</label>
+                            </div>
+                            <div class="mb-3 form-check">
+                                <input type="checkbox" class="form-check-input" name="is_admin" {% if user.is_admin %}checked{% endif %}>
+                                <label class="form-check-label">管理员权限</label>
+                            </div>
+                            <button type="submit" class="btn btn-primary w-100">保存修改</button>
+                        </form>
+                    </div>
+                </div>
+
+                <!-- 统计信息 -->
+                <div class="card mt-3">
+                    <div class="card-header">
+                        <h6 class="mb-0"><i class="bi bi-bar-chart"></i> 统计信息</h6>
+                    </div>
+                    <div class="card-body">
+                        <p>今日翻译: <strong>{{ user.daily_count }}</strong> 次</p>
+                        <p>总翻译: <strong>{{ user.total_count }}</strong> 次</p>
+                        <p>注册时间: {{ user.created_at.strftime('%Y-%m-%d %H:%M') }}</p>
+                        <p>最后翻译: {% if user.last_translate_date %}{{ user.last_translate_date }}{% else %}无{% endif %}</p>
+                    </div>
+                </div>
+            </div>
+
+            <!-- 翻译记录 -->
+            <div class="col-md-8">
+                <div class="card">
+                    <div class="card-header">
+                        <h6 class="mb-0"><i class="bi bi-file-text"></i> 翻译记录</h6>
+                    </div>
+                    <div class="card-body p-0">
+                        <table class="table table-hover mb-0">
+                            <thead class="table-light">
+                                <tr>
+                                    <th>文件名</th>
+                                    <th>页数</th>
+                                    <th>状态</th>
+                                    <th>缓存</th>
+                                    <th>时间</th>
+                                    <th>操作</th>
+                                </tr>
+                            </thead>
+                            <tbody>
+                                {% for t in translations %}
+                                <tr>
+                                    <td>{{ t.original_filename[:30] }}{% if t.original_filename|length > 30 %}...{% endif %}</td>
+                                    <td>{{ t.page_count }}</td>
+                                    <td>
+                                        <span class="badge bg-{% if t.status == 'completed' %}success{% elif t.status == 'processing' %}warning{% else %}danger{% endif %}">
+                                            {{ t.status }}
+                                        </span>
+                                    </td>
+                                    <td>{% if t.from_cache %}<i class="bi bi-check-circle text-success"></i>{% else %}-{% endif %}</td>
+                                    <td>{{ t.created_at.strftime('%m-%d %H:%M') }}</td>
+                                    <td>
+                                        <a href="{{ url_for('admin.translation_detail', trans_id=t.id) }}" class="btn btn-sm btn-outline-primary">
+                                            <i class="bi bi-eye"></i>
+                                        </a>
+                                    </td>
+                                </tr>
+                                {% else %}
+                                <tr><td colspan="6" class="text-center text-muted py-4">暂无翻译记录</td></tr>
+                                {% endfor %}
+                            </tbody>
+                        </table>
+                    </div>
+                </div>
+            </div>
+        </div>
+    </main>
+
+    <script>
+        document.getElementById('userForm').addEventListener('submit', function(e) {
+            e.preventDefault();
+            
+            const formData = new FormData(this);
+            const data = {
+                username: formData.get('username'),
+                email: formData.get('email'),
+                user_type: formData.get('user_type'),
+                membership_expire: formData.get('membership_expire'),
+                new_password: formData.get('new_password'),
+                is_active: formData.get('is_active') === 'on',
+                is_admin: formData.get('is_admin') === 'on'
+            };
+            
+            fetch('', {
+                method: 'POST',
+                headers: {'Content-Type': 'application/json'},
+                body: JSON.stringify(data)
+            })
+            .then(r => r.json())
+            .then(result => {
+                if (result.success) {
+                    alert('保存成功');
+                    location.reload();
+                } else {
+                    alert('保存失败: ' + (result.error || '未知错误'));
+                }
+            });
+        });
+    </script>
+</body>
+</html>
\ No newline at end of file
diff --git a/templates/admin/user_detail.html.bak b/templates/admin/user_detail.html.bak
new file mode 100644
index 0000000..8f0973a
--- /dev/null
+++ b/templates/admin/user_detail.html.bak
@@ -0,0 +1,180 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>用户详情 - 后台管理</title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.0/font/bootstrap-icons.css" rel="stylesheet">
+    <style>
+        body { background-color: #f5f5f5; }
+        .sidebar { position: fixed; top: 0; left: 0; height: 100vh; width: 250px; background: #343a40; padding-top: 60px; }
+        .sidebar .nav-link { color: #adb5bd; padding: 12px 20px; }
+        .sidebar .nav-link:hover, .sidebar .nav-link.active { color: #fff; background: rgba(255,255,255,0.1); }
+        .sidebar .nav-link i { margin-right: 10px; }
+        .main-content { margin-left: 250px; padding: 20px; }
+    </style>
+</head>
+<body>
+    <nav class="sidebar">
+        <div class="position-absolute top-0 w-100 p-3 border-bottom border-secondary">
+            <h5 class="text-white mb-0"><i class="bi bi-gear-fill"></i> 后台管理</h5>
+        </div>
+        <ul class="nav flex-column">
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.dashboard') }}"><i class="bi bi-speedometer2"></i> 数据概览</a></li>
+            <li class="nav-item"><a class="nav-link active" href="{{ url_for('admin.users') }}"><i class="bi bi-people"></i> 用户管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.translations') }}"><i class="bi bi-file-text"></i> 翻译记录</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.cache_list') }}"><i class="bi bi-database"></i> 缓存管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.stats') }}"><i class="bi bi-bar-chart"></i> 统计报表</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.logs') }}"><i class="bi bi-list-check"></i> 操作日志</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.settings') }}"><i class="bi bi-sliders"></i> 系统配置</a></li>
+        </ul>
+        <div class="position-absolute bottom-0 w-100 p-3 border-top border-secondary">
+            <a href="/" class="btn btn-outline-light btn-sm w-100"><i class="bi bi-house"></i> 返回前台</a>
+        </div>
+    </nav>
+
+    <main class="main-content">
+        <div class="row">
+            <!-- 用户信息 -->
+            <div class="col-md-4">
+                <div class="card">
+                    <div class="card-header">
+                        <h6 class="mb-0"><i class="bi bi-person"></i> 用户信息</h6>
+                    </div>
+                    <div class="card-body">
+                        <form id="userForm">
+                            <div class="mb-3">
+                                <label class="form-label">用户名</label>
+                                <input type="text" class="form-control" name="username" value="{{ user.username }}">
+                            </div>
+                            <div class="mb-3">
+                                <label class="form-label">邮箱</label>
+                                <input type="email" class="form-control" name="email" value="{{ user.email }}">
+                            </div>
+                            <div class="mb-3">
+                                <label class="form-label">用户类型</label>
+                                <select class="form-select" name="user_type">
+                                    <option value="free" {% if user.user_type == 'free' %}selected{% endif %}>免费用户</option>
+                                    <option value="vip_basic" {% if user.user_type == 'vip_basic' %}selected{% endif %}>基础会员</option>
+                                    <option value="vip_pro" {% if user.user_type == 'vip_pro' %}selected{% endif %}>专业会员</option>
+                                    <option value="vip_enterprise" {% if user.user_type == 'vip_enterprise' %}selected{% endif %}>企业会员</option>
+                                    <option value="admin" {% if user.user_type == 'admin' %}selected{% endif %}>管理员</option>
+                                </select>
+                            </div>
+                            <div class="mb-3">
+                                <label class="form-label">会员到期时间</label>
+                                <input type="datetime-local" class="form-control" name="membership_expire" 
+                                    value="{% if user.membership_expire %}{{ user.membership_expire.strftime('%Y-%m-%dT%H:%M') }}{% endif %}">
+                            </div>
+                            <div class="mb-3">
+                                <label class="form-label">新密码（留空不修改）</label>
+                                <input type="password" class="form-control" name="new_password" placeholder="输入新密码">
+                            </div>
+                            <div class="mb-3 form-check">
+                                <input type="checkbox" class="form-check-input" name="is_active" {% if user.is_active %}checked{% endif %}>
+                                <label class="form-check-label">账号启用</label>
+                            </div>
+                            <div class="mb-3 form-check">
+                                <input type="checkbox" class="form-check-input" name="is_admin" {% if user.is_admin %}checked{% endif %}>
+                                <label class="form-check-label">管理员权限</label>
+                            </div>
+                            <button type="submit" class="btn btn-primary w-100">保存修改</button>
+                        </form>
+                    </div>
+                </div>
+
+                <!-- 统计信息 -->
+                <div class="card mt-3">
+                    <div class="card-header">
+                        <h6 class="mb-0"><i class="bi bi-bar-chart"></i> 统计信息</h6>
+                    </div>
+                    <div class="card-body">
+                        <p>今日翻译: <strong>{{ user.daily_count }}</strong> 次</p>
+                        <p>总翻译: <strong>{{ user.total_count }}</strong> 次</p>
+                        <p>注册时间: {{ user.created_at.strftime('%Y-%m-%d %H:%M') }}</p>
+                        <p>最后翻译: {% if user.last_translate_date %}{{ user.last_translate_date }}{% else %}无{% endif %}</p>
+                    </div>
+                </div>
+            </div>
+
+            <!-- 翻译记录 -->
+            <div class="col-md-8">
+                <div class="card">
+                    <div class="card-header">
+                        <h6 class="mb-0"><i class="bi bi-file-text"></i> 翻译记录</h6>
+                    </div>
+                    <div class="card-body p-0">
+                        <table class="table table-hover mb-0">
+                            <thead class="table-light">
+                                <tr>
+                                    <th>文件名</th>
+                                    <th>页数</th>
+                                    <th>状态</th>
+                                    <th>缓存</th>
+                                    <th>时间</th>
+                                    <th>操作</th>
+                                </tr>
+                            </thead>
+                            <tbody>
+                                {% for t in translations %}
+                                <tr>
+                                    <td>{{ t.original_filename[:30] }}{% if t.original_filename|length > 30 %}...{% endif %}</td>
+                                    <td>{{ t.page_count }}</td>
+                                    <td>
+                                        <span class="badge bg-{% if t.status == 'completed' %}success{% elif t.status == 'processing' %}warning{% else %}danger{% endif %}">
+                                            {{ t.status }}
+                                        </span>
+                                    </td>
+                                    <td>{% if t.from_cache %}<i class="bi bi-check-circle text-success"></i>{% else %}-{% endif %}</td>
+                                    <td>{{ t.created_at.strftime('%m-%d %H:%M') }}</td>
+                                    <td>
+                                        <a href="{{ url_for('admin.translation_detail', trans_id=t.id) }}" class="btn btn-sm btn-outline-primary">
+                                            <i class="bi bi-eye"></i>
+                                        </a>
+                                    </td>
+                                </tr>
+                                {% else %}
+                                <tr><td colspan="6" class="text-center text-muted py-4">暂无翻译记录</td></tr>
+                                {% endfor %}
+                            </tbody>
+                        </table>
+                    </div>
+                </div>
+            </div>
+        </div>
+    </main>
+
+    <script>
+        document.getElementById('userForm').addEventListener('submit', function(e) {
+            e.preventDefault();
+            
+            const formData = new FormData(this);
+            const data = {
+                username: formData.get('username'),
+                email: formData.get('email'),
+                user_type: formData.get('user_type'),
+                membership_expire: formData.get('membership_expire'),
+                new_password: formData.get('new_password'),
+                is_active: formData.get('is_active') === 'on',
+                is_admin: formData.get('is_admin') === 'on'
+            };
+            
+            fetch('', {
+                method: 'POST',
+                headers: {'Content-Type': 'application/json'},
+                body: JSON.stringify(data)
+            })
+            .then(r => r.json())
+            .then(result => {
+                if (result.success) {
+                    alert('保存成功');
+                    location.reload();
+                } else {
+                    alert('保存失败: ' + (result.error || '未知错误'));
+                }
+            });
+        });
+    </script>
+</body>
+</html>
\ No newline at end of file
diff --git a/templates/admin/user_limits.html b/templates/admin/user_limits.html
new file mode 100644
index 0000000..d7fa8b5
--- /dev/null
+++ b/templates/admin/user_limits.html
@@ -0,0 +1,154 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <title>用户权限配置 - 后台管理</title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.0/font/bootstrap-icons.css" rel="stylesheet">
+    <style>
+        body { background-color: #f5f5f5; }
+        .sidebar { position: fixed; top: 0; left: 0; height: 100vh; width: 250px; background: #343a40; padding-top: 60px; }
+        .sidebar .nav-link { color: #adb5bd; padding: 12px 20px; }
+        .sidebar .nav-link:hover, .sidebar .nav-link.active { color: #fff; background: rgba(255,255,255,0.1); }
+        .main-content { margin-left: 250px; padding: 20px; }
+    </style>
+</head>
+<body>
+    <nav class="sidebar">
+        <div class="position-absolute top-0 w-100 p-3 border-bottom border-secondary">
+            <h5 class="text-white mb-0"><i class="bi bi-gear-fill"></i> 后台管理</h5>
+        </div>
+        <ul class="nav flex-column">
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.dashboard') }}"><i class="bi bi-speedometer2"></i> 数据概览</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.users') }}"><i class="bi bi-people"></i> 用户管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.translations') }}"><i class="bi bi-file-text"></i> 翻译记录</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.cache_list') }}"><i class="bi bi-database"></i> 缓存管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.packages') }}"><i class="bi bi-box-seam"></i> 数据包套餐</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.stats') }}"><i class="bi bi-bar-chart"></i> 统计报表</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.logs') }}"><i class="bi bi-list-check"></i> 操作日志</a></li>
+            <li class="nav-item"><a class="nav-link active" href="{{ url_for('admin.settings') }}"><i class="bi bi-sliders"></i> 系统配置</a></li>
+        </ul>
+        <div class="position-absolute bottom-0 w-100 p-3 border-top border-secondary">
+            <a href="/" class="btn btn-outline-light btn-sm w-100"><i class="bi bi-house"></i> 返回前台</a>
+        </div>
+    </nav>
+
+    <main class="main-content">
+        <div class="d-flex justify-content-between align-items-center mb-4">
+            <h4><i class="bi bi-sliders"></i> 用户权限配置</h4>
+            <div>
+                <a href="{{ url_for('admin.membership_settings') }}" class="btn btn-outline-primary">
+                    <i class="bi bi-credit-card"></i> 会员套餐配置
+                </a>
+                <a href="{{ url_for('admin.settings') }}" class="btn btn-outline-secondary">
+                    <i class="bi bi-gear"></i> 基础设置
+                </a>
+            </div>
+        </div>
+
+        <form id="limitsForm">
+            <div class="row">
+                {% for user_type, limits in limits_config.items() %}
+                <div class="col-md-4 mb-4">
+                    <div class="card">
+                        <div class="card-header">
+                            <h6 class="mb-0">
+                                {% if user_type == 'guest' %}👤 访客
+                                {% elif user_type == 'free' %}🆓 免费用户
+                                {% elif user_type == 'vip_basic' %}⭐ 基础会员
+                                {% elif user_type == 'vip_pro' %}⭐⭐ 专业会员
+                                {% elif user_type == 'vip_enterprise' %}👑 企业会员
+                                {% endif %}
+                            </h6>
+                        </div>
+                        <div class="card-body">
+                            <div class="mb-3">
+                                <label class="form-label">每日翻译次数</label>
+                                <input type="number" class="form-control" name="{{ user_type }}_daily_translations" 
+                                    value="{{ limits.daily_translations }}">
+                                <small class="text-muted">输入 0 表示无限制</small>
+                            </div>
+                            <div class="mb-3">
+                                <label class="form-label">单文件最大页数</label>
+                                <input type="number" class="form-control" name="{{ user_type }}_max_pages"
+                                    value="{{ limits.max_pages }}">
+                                <small class="text-muted">输入 0 表示无限制</small>
+                            </div>
+                            <div class="mb-3">
+                                <label class="form-label">最大文件大小 (MB)</label>
+                                <input type="number" class="form-control" name="{{ user_type }}_max_file_size"
+                                    value="{{ limits.max_file_size / 1024 / 1024 | round(0) }}">
+                            </div>
+                            
+                            <div class="text-muted small">
+                                <strong>默认值:</strong><br>
+                                次数: {{ default_limits.get(user_type, {}).get('daily_translations', 'N/A') }}<br>
+                                页数: {{ default_limits.get(user_type, {}).get('max_pages', 'N/A') }}
+                            </div>
+                        </div>
+                    </div>
+                </div>
+                {% endfor %}
+            </div>
+
+            <div class="card">
+                <div class="card-body">
+                    <button type="submit" class="btn btn-primary">
+                        <i class="bi bi-check-circle"></i> 保存配置
+                    </button>
+                    <button type="button" class="btn btn-outline-secondary" onclick="resetDefaults()">
+                        <i class="bi bi-arrow-counterclockwise"></i> 恢复默认
+                    </button>
+                </div>
+            </div>
+        </form>
+    </main>
+
+    <script>
+        const defaultLimits = {{ default_limits | tojson }};
+        
+        document.getElementById('limitsForm').addEventListener('submit', function(e) {
+            e.preventDefault();
+            
+            const formData = new FormData(this);
+            const data = {};
+            
+            {% for user_type in limits_config.keys() %}
+            data['{{ user_type }}'] = {
+                daily_translations: parseInt(formData.get('{{ user_type }}_daily_translations')),
+                max_pages: parseInt(formData.get('{{ user_type }}_max_pages')),
+                max_file_size: parseInt(formData.get('{{ user_type }}_max_file_size')) * 1024 * 1024
+            };
+            {% endfor %}
+            
+            fetch('/admin/settings/user-limits', {
+                method: 'POST',
+                headers: {'Content-Type': 'application/json'},
+                body: JSON.stringify(data)
+            })
+            .then(r => r.json())
+            .then(result => {
+                if (result.success) {
+                    alert('配置已保存');
+                } else {
+                    alert('保存失败: ' + result.error);
+                }
+            });
+        });
+        
+        function resetDefaults() {
+            if (!confirm('确定恢复为默认配置？')) return;
+            
+            for (const [type, limits] of Object.entries(defaultLimits)) {
+                const dailyInput = document.querySelector(`[name="${type}_daily_translations"]`);
+                const pagesInput = document.querySelector(`[name="${type}_max_pages"]`);
+                const sizeInput = document.querySelector(`[name="${type}_max_file_size"]`);
+                
+                if (dailyInput) dailyInput.value = limits.daily_translations;
+                if (pagesInput) pagesInput.value = limits.max_pages;
+                if (sizeInput) sizeInput.value = limits.max_file_size / 1024 / 1024;
+            }
+        }
+    </script>
+</body>
+</html>
\ No newline at end of file
diff --git a/templates/admin/users.html b/templates/admin/users.html
new file mode 100644
index 0000000..fc1e59f
--- /dev/null
+++ b/templates/admin/users.html
@@ -0,0 +1,148 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>用户管理 - 后台管理</title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.0/font/bootstrap-icons.css" rel="stylesheet">
+    <style>
+        body { background-color: #f5f5f5; }
+        .sidebar { position: fixed; top: 0; left: 0; height: 100vh; width: 250px; background: #343a40; padding-top: 60px; }
+        .sidebar .nav-link { color: #adb5bd; padding: 12px 20px; border-left: 3px solid transparent; }
+        .sidebar .nav-link:hover, .sidebar .nav-link.active { color: #fff; background: rgba(255,255,255,0.1); border-left-color: #0d6efd; }
+        .sidebar .nav-link i { margin-right: 10px; }
+        .main-content { margin-left: 250px; padding: 20px; }
+    </style>
+</head>
+<body>
+    <!-- 侧边栏 -->
+    <nav class="sidebar">
+        <div class="position-absolute top-0 w-100 p-3 border-bottom border-secondary">
+            <h5 class="text-white mb-0"><i class="bi bi-gear-fill"></i> 后台管理</h5>
+        </div>
+        <ul class="nav flex-column">
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.dashboard') }}"><i class="bi bi-speedometer2"></i> 数据概览</a></li>
+            <li class="nav-item"><a class="nav-link active" href="{{ url_for('admin.users') }}"><i class="bi bi-people"></i> 用户管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.translations') }}"><i class="bi bi-file-text"></i> 翻译记录</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.cache_list') }}"><i class="bi bi-database"></i> 缓存管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.stats') }}"><i class="bi bi-bar-chart"></i> 统计报表</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.logs') }}"><i class="bi bi-list-check"></i> 操作日志</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.settings') }}"><i class="bi bi-sliders"></i> 系统配置</a></li>
+        </ul>
+        <div class="position-absolute bottom-0 w-100 p-3 border-top border-secondary">
+            <a href="/" class="btn btn-outline-light btn-sm w-100"><i class="bi bi-house"></i> 返回前台</a>
+        </div>
+    </nav>
+
+    <!-- 主内容 -->
+    <main class="main-content">
+        <div class="card">
+            <div class="card-header">
+                <div class="row align-items-center">
+                    <div class="col">
+                        <h5 class="mb-0"><i class="bi bi-people"></i> 用户管理</h5>
+                    </div>
+                    <div class="col-auto">
+                        <form method="get" class="d-flex gap-2">
+                            <input type="text" class="form-control" name="search" value="{{ search }}" placeholder="搜索用户名/邮箱">
+                            <select class="form-select" name="type">
+                                <option value="">全部类型</option>
+                                {% for t in user_types %}
+                                <option value="{{ t }}" {% if user_type == t %}selected{% endif %}>{{ t }}</option>
+                                {% endfor %}
+                            </select>
+                            <button class="btn btn-primary"><i class="bi bi-search"></i></button>
+                        </form>
+                    </div>
+                </div>
+            </div>
+            <div class="card-body p-0">
+                <table class="table table-hover mb-0">
+                    <thead class="table-light">
+                        <tr>
+                            <th>ID</th>
+                            <th>用户名</th>
+                            <th>邮箱</th>
+                            <th>类型</th>
+                            <th>翻译次数</th>
+                            <th>状态</th>
+                            <th>注册时间</th>
+                            <th>操作</th>
+                        </tr>
+                    </thead>
+                    <tbody>
+                        {% for user in users.items %}
+                        <tr>
+                            <td>{{ user.id }}</td>
+                            <td>
+                                {{ user.username }}
+                                {% if user.is_admin %}<span class="badge bg-danger">管理员</span>{% endif %}
+                            </td>
+                            <td>{{ user.email }}</td>
+                            <td>
+                                <span class="badge bg-{% if user.user_type == 'free' %}secondary{% elif 'vip' in user.user_type %}warning{% else %}primary{% endif %}">
+                                    {{ user.user_type }}
+                                </span>
+                            </td>
+                            <td>
+                                <span title="今日">{{ user.daily_count }}</span> /
+                                <span title="总计">{{ user.total_count }}</span>
+                            </td>
+                            <td>
+                                {% if user.is_active %}
+                                <span class="badge bg-success">正常</span>
+                                {% else %}
+                                <span class="badge bg-danger">禁用</span>
+                                {% endif %}
+                            </td>
+                            <td>{{ user.created_at.strftime('%Y-%m-%d %H:%M') }}</td>
+                            <td>
+                                <a href="{{ url_for('admin.user_detail', user_id=user.id) }}" class="btn btn-sm btn-outline-primary">
+                                    <i class="bi bi-eye"></i>
+                                </a>
+                                <button class="btn btn-sm btn-outline-danger" onclick="deleteUser({{ user.id }}, '{{ user.username }}')">
+                                    <i class="bi bi-trash"></i>
+                                </button>
+                            </td>
+                        </tr>
+                        {% else %}
+                        <tr><td colspan="8" class="text-center text-muted py-4">暂无数据</td></tr>
+                        {% endfor %}
+                    </tbody>
+                </table>
+            </div>
+            <div class="card-footer">
+                <nav>
+                    <ul class="pagination mb-0">
+                        {% if users.has_prev %}
+                        <li class="page-item"><a class="page-link" href="?page={{ users.prev_num }}&search={{ search }}&type={{ user_type }}">上一页</a></li>
+                        {% endif %}
+                        <li class="page-item disabled"><span class="page-link">{{ users.page }} / {{ users.pages }}</span></li>
+                        {% if users.has_next %}
+                        <li class="page-item"><a class="page-link" href="?page={{ users.next_num }}&search={{ search }}&type={{ user_type }}">下一页</a></li>
+                        {% endif %}
+                    </ul>
+                </nav>
+            </div>
+        </div>
+    </main>
+
+    <script>
+        function deleteUser(id, name) {
+            if (!confirm('确定删除用户 "' + name + '" 吗？此操作不可恢复！')) return;
+            
+            fetch(`/admin/user/${id}/delete`, { method: 'POST' })
+                .then(r => r.json())
+                .then(data => {
+                    if (data.success) {
+                        alert('删除成功');
+                        location.reload();
+                    } else {
+                        alert('删除失败: ' + data.error);
+                    }
+                });
+        }
+    </script>
+</body>
+</html>
\ No newline at end of file
diff --git a/templates/admin/users.html.bak b/templates/admin/users.html.bak
new file mode 100644
index 0000000..fc1e59f
--- /dev/null
+++ b/templates/admin/users.html.bak
@@ -0,0 +1,148 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>用户管理 - 后台管理</title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.0/font/bootstrap-icons.css" rel="stylesheet">
+    <style>
+        body { background-color: #f5f5f5; }
+        .sidebar { position: fixed; top: 0; left: 0; height: 100vh; width: 250px; background: #343a40; padding-top: 60px; }
+        .sidebar .nav-link { color: #adb5bd; padding: 12px 20px; border-left: 3px solid transparent; }
+        .sidebar .nav-link:hover, .sidebar .nav-link.active { color: #fff; background: rgba(255,255,255,0.1); border-left-color: #0d6efd; }
+        .sidebar .nav-link i { margin-right: 10px; }
+        .main-content { margin-left: 250px; padding: 20px; }
+    </style>
+</head>
+<body>
+    <!-- 侧边栏 -->
+    <nav class="sidebar">
+        <div class="position-absolute top-0 w-100 p-3 border-bottom border-secondary">
+            <h5 class="text-white mb-0"><i class="bi bi-gear-fill"></i> 后台管理</h5>
+        </div>
+        <ul class="nav flex-column">
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.dashboard') }}"><i class="bi bi-speedometer2"></i> 数据概览</a></li>
+            <li class="nav-item"><a class="nav-link active" href="{{ url_for('admin.users') }}"><i class="bi bi-people"></i> 用户管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.translations') }}"><i class="bi bi-file-text"></i> 翻译记录</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.cache_list') }}"><i class="bi bi-database"></i> 缓存管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.stats') }}"><i class="bi bi-bar-chart"></i> 统计报表</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.logs') }}"><i class="bi bi-list-check"></i> 操作日志</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.settings') }}"><i class="bi bi-sliders"></i> 系统配置</a></li>
+        </ul>
+        <div class="position-absolute bottom-0 w-100 p-3 border-top border-secondary">
+            <a href="/" class="btn btn-outline-light btn-sm w-100"><i class="bi bi-house"></i> 返回前台</a>
+        </div>
+    </nav>
+
+    <!-- 主内容 -->
+    <main class="main-content">
+        <div class="card">
+            <div class="card-header">
+                <div class="row align-items-center">
+                    <div class="col">
+                        <h5 class="mb-0"><i class="bi bi-people"></i> 用户管理</h5>
+                    </div>
+                    <div class="col-auto">
+                        <form method="get" class="d-flex gap-2">
+                            <input type="text" class="form-control" name="search" value="{{ search }}" placeholder="搜索用户名/邮箱">
+                            <select class="form-select" name="type">
+                                <option value="">全部类型</option>
+                                {% for t in user_types %}
+                                <option value="{{ t }}" {% if user_type == t %}selected{% endif %}>{{ t }}</option>
+                                {% endfor %}
+                            </select>
+                            <button class="btn btn-primary"><i class="bi bi-search"></i></button>
+                        </form>
+                    </div>
+                </div>
+            </div>
+            <div class="card-body p-0">
+                <table class="table table-hover mb-0">
+                    <thead class="table-light">
+                        <tr>
+                            <th>ID</th>
+                            <th>用户名</th>
+                            <th>邮箱</th>
+                            <th>类型</th>
+                            <th>翻译次数</th>
+                            <th>状态</th>
+                            <th>注册时间</th>
+                            <th>操作</th>
+                        </tr>
+                    </thead>
+                    <tbody>
+                        {% for user in users.items %}
+                        <tr>
+                            <td>{{ user.id }}</td>
+                            <td>
+                                {{ user.username }}
+                                {% if user.is_admin %}<span class="badge bg-danger">管理员</span>{% endif %}
+                            </td>
+                            <td>{{ user.email }}</td>
+                            <td>
+                                <span class="badge bg-{% if user.user_type == 'free' %}secondary{% elif 'vip' in user.user_type %}warning{% else %}primary{% endif %}">
+                                    {{ user.user_type }}
+                                </span>
+                            </td>
+                            <td>
+                                <span title="今日">{{ user.daily_count }}</span> /
+                                <span title="总计">{{ user.total_count }}</span>
+                            </td>
+                            <td>
+                                {% if user.is_active %}
+                                <span class="badge bg-success">正常</span>
+                                {% else %}
+                                <span class="badge bg-danger">禁用</span>
+                                {% endif %}
+                            </td>
+                            <td>{{ user.created_at.strftime('%Y-%m-%d %H:%M') }}</td>
+                            <td>
+                                <a href="{{ url_for('admin.user_detail', user_id=user.id) }}" class="btn btn-sm btn-outline-primary">
+                                    <i class="bi bi-eye"></i>
+                                </a>
+                                <button class="btn btn-sm btn-outline-danger" onclick="deleteUser({{ user.id }}, '{{ user.username }}')">
+                                    <i class="bi bi-trash"></i>
+                                </button>
+                            </td>
+                        </tr>
+                        {% else %}
+                        <tr><td colspan="8" class="text-center text-muted py-4">暂无数据</td></tr>
+                        {% endfor %}
+                    </tbody>
+                </table>
+            </div>
+            <div class="card-footer">
+                <nav>
+                    <ul class="pagination mb-0">
+                        {% if users.has_prev %}
+                        <li class="page-item"><a class="page-link" href="?page={{ users.prev_num }}&search={{ search }}&type={{ user_type }}">上一页</a></li>
+                        {% endif %}
+                        <li class="page-item disabled"><span class="page-link">{{ users.page }} / {{ users.pages }}</span></li>
+                        {% if users.has_next %}
+                        <li class="page-item"><a class="page-link" href="?page={{ users.next_num }}&search={{ search }}&type={{ user_type }}">下一页</a></li>
+                        {% endif %}
+                    </ul>
+                </nav>
+            </div>
+        </div>
+    </main>
+
+    <script>
+        function deleteUser(id, name) {
+            if (!confirm('确定删除用户 "' + name + '" 吗？此操作不可恢复！')) return;
+            
+            fetch(`/admin/user/${id}/delete`, { method: 'POST' })
+                .then(r => r.json())
+                .then(data => {
+                    if (data.success) {
+                        alert('删除成功');
+                        location.reload();
+                    } else {
+                        alert('删除失败: ' + data.error);
+                    }
+                });
+        }
+    </script>
+</body>
+</html>
\ No newline at end of file
diff --git a/templates/history.html b/templates/history.html
new file mode 100644
index 0000000..68c5674
--- /dev/null
+++ b/templates/history.html
@@ -0,0 +1,62 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>翻译历史 - PDF翻译助手</title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link href="/static/css/style.css" rel="stylesheet">
+</head>
+<body>
+    <nav class="navbar navbar-expand-lg navbar-dark bg-primary">
+        <div class="container">
+            <a class="navbar-brand" href="/">📄 PDF翻译助手</a>
+            <div class="navbar-nav ms-auto">
+                <span class="nav-link text-light">👋 {{ user.username }}</span>
+                <a class="nav-link" href="/logout">退出</a>
+            </div>
+        </div>
+    </nav>
+
+    <main class="container my-5">
+        <h2 class="mb-4">翻译历史</h2>
+        
+        {% if translations %}
+        <div class="card">
+            <div class="card-body">
+                {% for t in translations %}
+                <div class="history-item">
+                    <div>
+                        <strong>{{ t.original_filename }}</strong>
+                        <small class="text-muted ms-2">{{ t.page_count }}页</small>
+                        {% if t.from_cache %}
+                        <span class="badge bg-success ms-2">缓存</span>
+                        {% endif %}
+                        <small class="text-muted d-block">{{ t.created_at.strftime('%Y-%m-%d %H:%M') }}</small>
+                    </div>
+                    <div>
+                        <span class="badge 
+                            {% if t.status == 'completed' %}bg-success{% endif %}
+                            {% if t.status == 'processing' %}bg-warning{% endif %}
+                            {% if t.status == 'failed' %}bg-danger{% endif %}
+                        ">{{ t.status }}</span>
+                        
+                        {% if t.status == 'completed' %}
+                        <a href="/translate/{{ t.id }}" class="btn btn-sm btn-outline-primary ms-2">查看</a>
+                        <a href="/api/download/{{ t.id }}" class="btn btn-sm btn-success ms-2">下载</a>
+                        {% endif %}
+                    </div>
+                </div>
+                {% endfor %}
+            </div>
+        </div>
+        {% else %}
+        <div class="alert alert-info">
+            还没有翻译记录，<a href="/">开始翻译</a>吧！
+        </div>
+        {% endif %}
+    </main>
+
+    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js"></script>
+</body>
+</html>
\ No newline at end of file
diff --git a/templates/index.html b/templates/index.html
new file mode 100644
index 0000000..ddd28b8
--- /dev/null
+++ b/templates/index.html
@@ -0,0 +1,162 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>PDF翻译助手 - 英文PDF翻译中文</title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link href="/static/css/style.css" rel="stylesheet">
+</head>
+<body>
+    <!-- 导航栏 -->
+    <nav class="navbar navbar-expand-lg navbar-dark bg-primary">
+        <div class="container">
+            <a class="navbar-brand" href="/">📄 PDF翻译助手</a>
+            <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarNav">
+                <span class="navbar-toggler-icon"></span>
+            </button>
+            <div class="collapse navbar-collapse" id="navbarNav">
+                <ul class="navbar-nav me-auto">
+                    <li class="nav-item"><a class="nav-link" href="/">首页</a></li>
+                    <li class="nav-item"><a class="nav-link" href="/pricing">会员套餐</a></li>
+                    {% if user %}
+                    <li class="nav-item"><a class="nav-link" href="/history">翻译历史</a></li>
+                    {% endif %}
+                </ul>
+                <div class="navbar-nav">
+                    {% if user %}
+                    <span class="nav-link text-light">👋 {{ user.username }}</span>
+                    <a class="nav-link" href="/logout">退出</a>
+                    {% else %}
+                    <a class="nav-link" href="/login">登录</a>
+                    <a class="nav-link" href="/register">注册</a>
+                    {% endif %}
+                </div>
+            </div>
+        </div>
+    </nav>
+
+    <!-- 主内容 -->
+    <main class="container my-5">
+        <!-- 用户信息卡片 -->
+        <div class="row mb-4">
+            <div class="col-md-6">
+                <div class="card">
+                    <div class="card-body">
+                        <h5 class="card-title">📊 今日翻译额度</h5>
+                        {% if user %}
+                        <p class="card-text">
+                            用户类型: <strong>{{ user.user_type }}</strong><br>
+                            今日剩余: <strong class="text-success">{{ daily_remaining }}次</strong><br>
+                            单文件最大: <strong>{{ max_pages }}页</strong>
+                        </p>
+                        {% if not user.is_vip() %}
+                        <a href="/pricing" class="btn btn-outline-primary btn-sm">升级会员</a>
+                        {% endif %}
+                        {% else %}
+                        <p class="card-text">
+                            访客模式<br>
+                            今日剩余: <strong class="text-warning">{{ daily_remaining }}次</strong><br>
+                            单文件最大: <strong>{{ max_pages }}页</strong><br>
+                            <small class="text-muted">登录后可获得更多翻译次数</small>
+                        </p>
+                        <a href="/login" class="btn btn-primary btn-sm">登录获取更多</a>
+                        {% endif %}
+                    </div>
+                </div>
+            </div>
+            <div class="col-md-6">
+                <div class="card">
+                    <div class="card-body">
+                        <h5 class="card-title">✨ 功能特点</h5>
+                        <ul class="list-unstyled">
+                            <li>✅ 自动翻译缓存，相同文件秒出结果</li>
+                            <li>✅ 支持自定义翻译要求</li>
+                            <li>✅ 原文译文对比查看</li>
+                            <li>✅ 翻译历史记录</li>
+                        </ul>
+                    </div>
+                </div>
+            </div>
+        </div>
+
+        <!-- 上传区域 -->
+        <div class="card shadow">
+            <div class="card-header bg-primary text-white">
+                <h4 class="mb-0">📤 上传PDF文件</h4>
+            </div>
+            <div class="card-body">
+                <form id="uploadForm">
+                    <div class="mb-3">
+                        <label class="form-label">选择PDF文件（最大{{ max_pages }}页）</label>
+                        <input type="file" class="form-control" id="pdfFile" name="file" accept=".pdf" required>
+                        <div class="form-text">支持英文PDF翻译为中文</div>
+                    </div>
+                    
+                    {% if user %}
+                    <div class="mb-3">
+                        <label class="form-label">翻译要求（可选）</label>
+                        <textarea class="form-control" id="instruction" name="instruction" rows="2"
+                            placeholder="例如：保持专业术语原文、使用口语化表达等"></textarea>
+                    </div>
+                    {% endif %}
+                    
+                    <button type="submit" class="btn btn-primary btn-lg w-100" id="submitBtn">
+                        <span id="btnText">开始翻译</span>
+                        <span id="btnSpinner" class="spinner-border spinner-border-sm" style="display:none"></span>
+                    </button>
+                </form>
+            </div>
+        </div>
+
+        <!-- 翻译进度 -->
+        <div id="progressSection" class="card mt-4" style="display:none">
+            <div class="card-header">
+                <h5 class="mb-0">🔄 翻译进度</h5>
+            </div>
+            <div class="card-body">
+                <div class="progress mb-3">
+                    <div class="progress-bar" id="progressBar" role="progressbar" style="width: 0%">0%</div>
+                </div>
+                <p id="progressMessage" class="text-muted">等待开始...</p>
+                <div id="cacheNotice" class="alert alert-success" style="display:none">
+                    ✅ 使用缓存结果，无需重新翻译
+                </div>
+            </div>
+        </div>
+
+        <!-- 翻译结果 -->
+        <div id="resultSection" class="card mt-4" style="display:none">
+            <div class="card-header d-flex justify-content-between align-items-center">
+                <h5 class="mb-0">📝 翻译结果</h5>
+                <div>
+                    <button class="btn btn-outline-primary btn-sm" id="viewCompare">对比查看</button>
+                    <button class="btn btn-success btn-sm" id="downloadBtn">下载结果</button>
+                </div>
+            </div>
+            <div class="card-body">
+                <div id="resultContent" class="translation-content"></div>
+                
+                {% if user %}
+                <div class="mt-3">
+                    <label class="form-label">不满意？重新翻译</label>
+                    <textarea class="form-control" id="retranslateInstruction" rows="2"
+                        placeholder="输入新的翻译要求，如：更口语化、保留更多原文术语等"></textarea>
+                    <button class="btn btn-outline-secondary mt-2" id="retranslateBtn">重新翻译</button>
+                </div>
+                {% endif %}
+            </div>
+        </div>
+    </main>
+
+    <!-- 页脚 -->
+    <footer class="bg-light py-4 mt-5">
+        <div class="container text-center">
+            <p class="text-muted">PDF翻译助手 v1.0.0 | 基于本地LLM服务</p>
+        </div>
+    </footer>
+
+    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js"></script>
+    <script src="/static/js/main.js"></script>
+</body>
+</html>
\ No newline at end of file
diff --git a/templates/login.html b/templates/login.html
new file mode 100644
index 0000000..9bbcca8
--- /dev/null
+++ b/templates/login.html
@@ -0,0 +1,80 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>登录 - PDF翻译助手</title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link href="/static/css/style.css" rel="stylesheet">
+</head>
+<body class="bg-light">
+    <nav class="navbar navbar-dark bg-primary">
+        <div class="container">
+            <a class="navbar-brand" href="/">📄 PDF翻译助手</a>
+        </div>
+    </nav>
+
+    <div class="auth-form">
+        <h3 class="text-center mb-4">登录</h3>
+        
+        <form id="loginForm">
+            <div class="mb-3">
+                <label class="form-label">用户名</label>
+                <input type="text" class="form-control" id="username" name="username" required>
+            </div>
+            
+            <div class="mb-3">
+                <label class="form-label">密码</label>
+                <input type="password" class="form-control" id="password" name="password" required>
+            </div>
+            
+            <button type="submit" class="btn btn-primary w-100">登录</button>
+        </form>
+        
+        <hr>
+        
+        <p class="text-center text-muted">
+            还没有账号？ <a href="/register">立即注册</a>
+        </p>
+        
+        <div class="alert alert-info mt-3">
+            <strong>注册福利：</strong>
+            <ul class="mb-0">
+                <li>每日翻译次数提升至10次</li>
+                <li>单文件最大50页</li>
+                <li>翻译历史记录</li>
+                <li>支持重新翻译</li>
+            </ul>
+        </div>
+    </div>
+
+    <script>
+        document.getElementById('loginForm').addEventListener('submit', async function(e) {
+            e.preventDefault();
+            
+            const username = document.getElementById('username').value;
+            const password = document.getElementById('password').value;
+            
+            try {
+                const response = await fetch('/login', {
+                    method: 'POST',
+                    headers: {'Content-Type': 'application/json'},
+                    body: JSON.stringify({username, password})
+                });
+                
+                const result = await response.json();
+                
+                if (!response.ok) {
+                    throw new Error(result.error || '登录失败');
+                }
+                
+                // 登录成功，跳转首页
+                window.location.href = '/';
+                
+            } catch (error) {
+                alert('登录失败: ' + error.message);
+            }
+        });
+    </script>
+</body>
+</html>
\ No newline at end of file
diff --git a/templates/pricing.html b/templates/pricing.html
new file mode 100644
index 0000000..67cd100
--- /dev/null
+++ b/templates/pricing.html
@@ -0,0 +1,195 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>会员套餐 - PDF翻译助手</title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link href="/static/css/style.css" rel="stylesheet">
+</head>
+<body>
+    <nav class="navbar navbar-expand-lg navbar-dark bg-primary">
+        <div class="container">
+            <a class="navbar-brand" href="/">📄 PDF翻译助手</a>
+            <div class="navbar-nav ms-auto">
+                <a class="nav-link" href="/">首页</a>
+                <a class="nav-link" href="/login">登录</a>
+            </div>
+        </div>
+    </nav>
+
+    <main class="container my-5">
+        <h2 class="text-center mb-5">会员套餐</h2>
+        
+        <div class="row justify-content-center">
+            <!-- 基础会员 -->
+            <div class="col-md-4 mb-4">
+                <div class="card pricing-card h-100">
+                    <div class="card-body text-center">
+                        <h4 class="card-title">基础会员</h4>
+                        <div class="price my-3">¥29<small>/月</small></div>
+                        
+                        <ul class="features text-start">
+                            <li>✅ 每日翻译50次</li>
+                            <li>✅ 单文件最大100页</li>
+                            <li>✅ 翻译历史记录</li>
+                            <li>✅ 优先处理队列</li>
+                            <li>✅ 导出PDF格式</li>
+                        </ul>
+                        
+                        <button class="btn btn-outline-primary w-100 mt-3">立即购买</button>
+                    </div>
+                </div>
+            </div>
+            
+            <!-- 专业会员 -->
+            <div class="col-md-4 mb-4">
+                <div class="card pricing-card h-100 border-primary">
+                    <div class="card-header bg-primary text-white text-center">
+                        <strong>推荐</strong>
+                    </div>
+                    <div class="card-body text-center">
+                        <h4 class="card-title">专业会员</h4>
+                        <div class="price my-3">¥99<small>/月</small></div>
+                        
+                        <ul class="features text-start">
+                            <li>✅ 每日翻译200次</li>
+                            <li>✅ 单文件最大500页</li>
+                            <li>✅ 所有基础会员功能</li>
+                            <li>✅ 批量翻译</li>
+                            <li>✅ 自定义术语库</li>
+                        </ul>
+                        
+                        <button class="btn btn-primary w-100 mt-3">立即购买</button>
+                    </div>
+                </div>
+            </div>
+            
+            <!-- 企业会员 -->
+            <div class="col-md-4 mb-4">
+                <div class="card pricing-card h-100">
+                    <div class="card-body text-center">
+                        <h4 class="card-title">企业会员</h4>
+                        <div class="price my-3">¥999<small>/年</small></div>
+                        
+                        <ul class="features text-start">
+                            <li>✅ 翻译次数无限制</li>
+                            <li>✅ 页数无限制</li>
+                            <li>✅ 所有功能解锁</li>
+                            <li>✅ 专属客服支持</li>
+                            <li>✅ API接口调用</li>
+                        </ul>
+                        
+                        <button class="btn btn-outline-primary w-100 mt-3">联系购买</button>
+                    </div>
+                </div>
+            </div>
+        </div>
+        
+        <!-- 功能对比表 -->
+        <div class="card mt-5">
+            <div class="card-header">
+                <h4 class="mb-0">功能对比</h4>
+            </div>
+            <div class="card-body">
+                <table class="table table-striped">
+                    <thead>
+                        <tr>
+                            <th>功能</th>
+                            <th>访客</th>
+                            <th>免费用户</th>
+                            <th>基础会员</th>
+                            <th>专业会员</th>
+                            <th>企业会员</th>
+                        </tr>
+                    </thead>
+                    <tbody>
+                        <tr>
+                            <td>每日翻译次数</td>
+                            <td>3次</td>
+                            <td>10次</td>
+                            <td>50次</td>
+                            <td>200次</td>
+                            <td>无限制</td>
+                        </tr>
+                        <tr>
+                            <td>单文件最大页数</td>
+                            <td>20页</td>
+                            <td>50页</td>
+                            <td>100页</td>
+                            <td>500页</td>
+                            <td>无限制</td>
+                        </tr>
+                        <tr>
+                            <td>翻译缓存</td>
+                            <td class="text-success">✅</td>
+                            <td class="text-success">✅</td>
+                            <td class="text-success">✅</td>
+                            <td class="text-success">✅</td>
+                            <td class="text-success">✅</td>
+                        </tr>
+                        <tr>
+                            <td>翻译历史</td>
+                            <td class="text-danger">❌</td>
+                            <td class="text-success">✅</td>
+                            <td class="text-success">✅</td>
+                            <td class="text-success">✅</td>
+                            <td class="text-success">✅</td>
+                        </tr>
+                        <tr>
+                            <td>重新翻译</td>
+                            <td class="text-danger">❌</td>
+                            <td class="text-success">✅</td>
+                            <td class="text-success">✅</td>
+                            <td class="text-success">✅</td>
+                            <td class="text-success">✅</td>
+                        </tr>
+                        <tr>
+                            <td>对比查看</td>
+                            <td class="text-danger">❌</td>
+                            <td class="text-success">✅</td>
+                            <td class="text-success">✅</td>
+                            <td class="text-success">✅</td>
+                            <td class="text-success">✅</td>
+                        </tr>
+                        <tr>
+                            <td>导出PDF</td>
+                            <td class="text-danger">❌</td>
+                            <td class="text-danger">❌</td>
+                            <td class="text-success">✅</td>
+                            <td class="text-success">✅</td>
+                            <td class="text-success">✅</td>
+                        </tr>
+                        <tr>
+                            <td>批量翻译</td>
+                            <td class="text-danger">❌</td>
+                            <td class="text-danger">❌</td>
+                            <td class="text-danger">❌</td>
+                            <td class="text-success">✅</td>
+                            <td class="text-success">✅</td>
+                        </tr>
+                        <tr>
+                            <td>自定义术语</td>
+                            <td class="text-danger">❌</td>
+                            <td class="text-danger">❌</td>
+                            <td class="text-danger">❌</td>
+                            <td class="text-success">✅</td>
+                            <td class="text-success">✅</td>
+                        </tr>
+                        <tr>
+                            <td>API调用</td>
+                            <td class="text-danger">❌</td>
+                            <td class="text-danger">❌</td>
+                            <td class="text-danger">❌</td>
+                            <td class="text-danger">❌</td>
+                            <td class="text-success">✅</td>
+                        </tr>
+                    </tbody>
+                </table>
+            </div>
+        </div>
+    </main>
+
+    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js"></script>
+</body>
+</html>
\ No newline at end of file
diff --git a/templates/register.html b/templates/register.html
new file mode 100644
index 0000000..7f8da46
--- /dev/null
+++ b/templates/register.html
@@ -0,0 +1,82 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>注册 - PDF翻译助手</title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link href="/static/css/style.css" rel="stylesheet">
+</head>
+<body class="bg-light">
+    <nav class="navbar navbar-dark bg-primary">
+        <div class="container">
+            <a class="navbar-brand" href="/">📄 PDF翻译助手</a>
+        </div>
+    </nav>
+
+    <div class="auth-form">
+        <h3 class="text-center mb-4">注册账号</h3>
+        
+        <form id="registerForm">
+            <div class="mb-3">
+                <label class="form-label">用户名</label>
+                <input type="text" class="form-control" id="username" name="username" required>
+            </div>
+            
+            <div class="mb-3">
+                <label class="form-label">邮箱</label>
+                <input type="email" class="form-control" id="email" name="email" required>
+            </div>
+            
+            <div class="mb-3">
+                <label class="form-label">密码</label>
+                <input type="password" class="form-control" id="password" name="password" required minlength="6">
+                <div class="form-text">密码至少6位</div>
+            </div>
+            
+            <button type="submit" class="btn btn-primary w-100">注册</button>
+        </form>
+        
+        <hr>
+        
+        <p class="text-center text-muted">
+            已有账号？ <a href="/login">立即登录</a>
+        </p>
+    </div>
+
+    <script>
+        document.getElementById('registerForm').addEventListener('submit', async function(e) {
+            e.preventDefault();
+            
+            const username = document.getElementById('username').value;
+            const email = document.getElementById('email').value;
+            const password = document.getElementById('password').value;
+            
+            if (password.length < 6) {
+                alert('密码至少6位');
+                return;
+            }
+            
+            try {
+                const response = await fetch('/register', {
+                    method: 'POST',
+                    headers: {'Content-Type': 'application/json'},
+                    body: JSON.stringify({username, email, password})
+                });
+                
+                const result = await response.json();
+                
+                if (!response.ok) {
+                    throw new Error(result.error || '注册失败');
+                }
+                
+                alert('注册成功！');
+                window.location.href = '/';
+                
+            } catch (error) {
+                alert('注册失败: ' + error.message);
+            }
+        });
+    </script>
+</body>
+</html>
\ No newline at end of file
diff --git a/templates/translation.html b/templates/translation.html
new file mode 100644
index 0000000..1ff67e8
--- /dev/null
+++ b/templates/translation.html
@@ -0,0 +1,157 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>翻译详情 - PDF翻译助手</title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link href="/static/css/style.css" rel="stylesheet>
+</head>
+<body>
+    <nav class="navbar navbar-expand-lg navbar-dark bg-primary">
+        <div class="container">
+            <a class="navbar-brand" href="/">📄 PDF翻译助手</a>
+            <div class="navbar-nav ms-auto">
+                {% if user %}
+                <span class="nav-link text-light">👋 {{ user.username }}</span>
+                <a class="nav-link" href="/logout">退出</a>
+                {% endif %}
+            </div>
+        </div>
+    </nav>
+
+    <main class="container my-5">
+        <div class="card">
+            <div class="card-header d-flex justify-content-between align-items-center">
+                <h4 class="mb-0">{{ translation.original_filename }}</h4>
+                <div>
+                    <a href="/api/download/{{ translation.id }}" class="btn btn-success btn-sm">下载结果</a>
+                    <button class="btn btn-outline-primary btn-sm" id="toggleCompare">切换对比</button>
+                </div>
+            </div>
+            <div class="card-body">
+                <div class="mb-3">
+                    <small class="text-muted">
+                        页数: {{ translation.page_count }} | 
+                        时间: {{ translation.created_at.strftime('%Y-%m-%d %H:%M') }} |
+                        {% if translation.from_cache %}
+                        <span class="text-success">来自缓存</span>
+                        {% endif %}
+                    </small>
+                </div>
+                
+                <div id="resultContent" class="translation-content">
+                    加载中...
+                </div>
+                
+                {% if user %}
+                <hr>
+                <div class="mt-3">
+                    <h5>重新翻译</h5>
+                    <textarea class="form-control" id="retranslateInstruction" rows="2"
+                        placeholder="输入新的翻译要求，如：更口语化、保留更多原文术语等"></textarea>
+                    <button class="btn btn-primary mt-2" id="retranslateBtn">重新翻译</button>
+                </div>
+                {% endif %}
+            </div>
+        </div>
+    </main>
+
+    <script>
+        // 加载翻译结果
+        const translationId = {{ translation.id }};
+        let showCompare = false;
+        
+        async function loadResult() {
+            try {
+                const response = await fetch(`/api/result/${translationId}`);
+                const result = await response.json();
+                
+                document.getElementById('resultContent').innerHTML = renderMarkdown(result.content);
+                
+            } catch (error) {
+                document.getElementById('resultContent').innerHTML = '加载失败: ' + error.message;
+            }
+        }
+        
+        // 切换对比视图
+        document.getElementById('toggleCompare').addEventListener('click', async function() {
+            showCompare = !showCompare;
+            
+            if (showCompare) {
+                try {
+                    const response = await fetch(`/api/compare/${translationId}`);
+                    const result = await response.json();
+                    
+                    document.getElementById('resultContent').innerHTML = `
+                        <div class="compare-container">
+                            <div class="compare-panel original">
+                                <h5>原文</h5>
+                                <div>${escapeHtml(result.original)}</div>
+                            </div>
+                            <div class="compare-panel translated">
+                                <h5>译文</h5>
+                                <div>${renderMarkdown(result.translated)}</div>
+                            </div>
+                        </div>
+                    `;
+                    
+                } catch (error) {
+                    alert('加载对比失败');
+                }
+            } else {
+                loadResult();
+            }
+        });
+        
+        // 重新翻译
+        document.getElementById('retranslateBtn')?.addEventListener('click', async function() {
+            const instruction = document.getElementById('retranslateInstruction').value;
+            if (!instruction.trim()) {
+                alert('请输入翻译要求');
+                return;
+            }
+            
+            try {
+                const response = await fetch(`/api/retranslate/${translationId}`, {
+                    method: 'POST',
+                    headers: {'Content-Type': 'application/json'},
+                    body: JSON.stringify({instruction: instruction})
+                });
+                
+                const result = await response.json();
+                
+                if (!response.ok) {
+                    throw new Error(result.error);
+                }
+                
+                alert('重译任务已创建，请稍后查看');
+                window.location.reload();
+                
+            } catch (error) {
+                alert('重译失败: ' + error.message);
+            }
+        });
+        
+        // 简单Markdown渲染
+        function renderMarkdown(text) {
+            text = text.replace(/^## (.*)$/gm, '<h2>$1</h2>');
+            text = text.replace(/^# (.*)$/gm, '<h1>$1</h1>');
+            text = text.replace(/^---$/gm, '<hr>');
+            text = text.replace(/^> (.*)$/gm, '<blockquote>$1</blockquote>');
+            text = text.replace(/\n\n/g, '</p><p>');
+            text = '<p>' + text + '</p>';
+            return text;
+        }
+        
+        function escapeHtml(text) {
+            const div = document.createElement('div');
+            div.textContent = text;
+            return div.innerHTML;
+        }
+        
+        // 初始化加载
+        loadResult();
+    </script>
+</body>
+</html>
\ No newline at end of file