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+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>ParamHub - 参数百科</title>
+    <link rel="icon" type="image/svg+xml" href="/static/favicon.svg">
+    <script src="https://cdn.tailwindcss.com"></script>
+    <link href="https://cdn.jsdelivr.net/npm/remixicon@3.5.0/fonts/remixicon.css" rel="stylesheet">
+</head>
+<body class="bg-gray-50 min-h-screen">
+    <!-- 导航栏 -->
+    <nav class="bg-white shadow-sm sticky top-0 z-50">
+        <div class="max-w-7xl mx-auto px-4 py-3 flex justify-between items-center">
+            <a href="/" class="flex items-center gap-2">
+                <i class="ri-dashboard-3-line text-2xl text-indigo-600"></i>
+                <span class="text-xl font-bold text-gray-800">ParamHub</span>
+            </a>
+            <div class="flex gap-4 text-sm" id="topNav">
+                <!-- 动态加载 -->
+            </div>
+        </div>
+    </nav>
+
+    <main class="max-w-7xl mx-auto px-4 py-8">
+        <div class="mb-6">
+            <h1 class="text-2xl font-bold text-gray-800 flex items-center gap-2">
+                <i class="ri-calculator-line text-orange-600"></i>
+                实用工具
+            </h1>
+            <p class="text-gray-500 mt-1">AI开发常用计算工具</p>
+        </div>
+
+        <!-- 显存计算器 -->
+        <div class="bg-white rounded-xl shadow-sm p-6 mb-6">
+            <h2 class="text-lg font-semibold text-gray-800 mb-4 flex items-center gap-2">
+                <i class="ri-cpu-line text-green-600"></i>
+                显存计算器
+            </h2>
+            <p class="text-gray-500 mb-4">计算大模型所需的显存大小，并推荐合适的GPU</p>
+            
+            <div class="grid grid-cols-3 gap-4 mb-6">
+                <div>
+                    <label class="text-sm text-gray-600 mb-1 block">模型参数量 (B)</label>
+                    <input type="number" id="params" value="7" step="0.1" min="0.1" max="1000"
+                        class="w-full px-4 py-2 border border-gray-200 rounded-lg focus:outline-none focus:border-green-400">
+                </div>
+                <div>
+                    <label class="text-sm text-gray-600 mb-1 block">精度</label>
+                    <select id="precision" class="w-full px-4 py-2 border border-gray-200 rounded-lg focus:outline-none focus:border-green-400">
+                        <option value="fp32">FP32 (全精度)</option>
+                        <option value="fp16" selected>FP16 (半精度)</option>
+                        <option value="int8">INT8 (8位量化)</option>
+                        <option value="int4">INT4 (4位量化)</option>
+                    </select>
+                </div>
+                <div>
+                    <button onclick="calculateVram()" class="w-full px-4 py-2 bg-green-600 text-white rounded-lg hover:bg-green-700 transition mt-5">
+                        <i class="ri-calculator-line mr-2"></i>计算
+                    </button>
+                </div>
+            </div>
+
+            <!-- 计算结果 -->
+            <div id="vramResult" class="hidden">
+                <div class="grid grid-cols-2 gap-4 mb-4">
+                    <div class="p-4 bg-blue-50 rounded-lg">
+                        <div class="text-sm text-blue-600">模型权重占用</div>
+                        <div class="text-2xl font-bold text-blue-800 mt-1" id="modelVram">-</div>
+                    </div>
+                    <div class="p-4 bg-orange-50 rounded-lg">
+                        <div class="text-sm text-orange-600">总显存需求 (含KV Cache)</div>
+                        <div class="text-2xl font-bold text-orange-800 mt-1" id="totalVram">-</div>
+                    </div>
+                </div>
+
+                <div id="suitableGpus" class="mt-4">
+                    <h3 class="text-sm font-medium text-gray-600 mb-2">推荐的GPU:</h3>
+                    <div id="gpuList" class="grid grid-cols-3 gap-2"></div>
+                </div>
+            </div>
+        </div>
+
+        <!-- 精度说明 -->
+        <div class="bg-white rounded-xl shadow-sm p-6 mb-6">
+            <h2 class="text-lg font-semibold text-gray-800 mb-4 flex items-center gap-2">
+                <i class="ri-information-line text-blue-600"></i>
+                精度与显存关系
+            </h2>
+            <div class="grid grid-cols-4 gap-4">
+                <div class="p-4 bg-gray-50 rounded-lg text-center">
+                    <div class="text-lg font-bold text-gray-800">FP32</div>
+                    <div class="text-2xl font-bold text-blue-600 mt-2">4字节</div>
+                    <div class="text-sm text-gray-500 mt-1">全精度，最高精度</div>
+                </div>
+                <div class="p-4 bg-gray-50 rounded-lg text-center">
+                    <div class="text-lg font-bold text-gray-800">FP16</div>
+                    <div class="text-2xl font-bold text-green-600 mt-2">2字节</div>
+                    <div class="text-sm text-gray-500 mt-1">半精度，常用</div>
+                </div>
+                <div class="p-4 bg-gray-50 rounded-lg text-center">
+                    <div class="text-lg font-bold text-gray-800">INT8</div>
+                    <div class="text-2xl font-bold text-orange-600 mt-2">1字节</div>
+                    <div class="text-sm text-gray-500 mt-1">8位量化</div>
+                </div>
+                <div class="p-4 bg-gray-50 rounded-lg text-center">
+                    <div class="text-lg font-bold text-gray-800">INT4</div>
+                    <div class="text-2xl font-bold text-purple-600 mt-2">0.5字节</div>
+                    <div class="text-sm text-gray-500 mt-1">4位量化，最小</div>
+                </div>
+            </div>
+        </div>
+
+        <!-- 快速参考表 -->
+        <div class="bg-white rounded-xl shadow-sm p-6">
+            <h2 class="text-lg font-semibold text-gray-800 mb-4 flex items-center gap-2">
+                <i class="ri-table-line text-indigo-600"></i>
+                常见模型显存需求参考 (FP16)
+            </h2>
+            <table class="w-full">
+                <thead class="bg-gray-50">
+                    <tr>
+                        <th class="px-4 py-2 text-left text-sm font-medium text-gray-600">模型</th>
+                        <th class="px-4 py-2 text-left text-sm font-medium text-gray-600">参数量</th>
+                        <th class="px-4 py-2 text-left text-sm font-medium text-gray-600">模型权重</th>
+                        <th class="px-4 py-2 text-left text-sm font-medium text-gray-600">推荐显存</th>
+                        <th class="px-4 py-2 text-left text-sm font-medium text-gray-600">推荐GPU</th>
+                    </tr>
+                </thead>
+                <tbody class="divide-y">
+                    <tr><td class="px-4 py-2 text-gray-800">Mistral 7B</td><td class="px-4 py-2">7B</td><td class="px-4 py-2">14GB</td><td class="px-4 py-2">18GB</td><td class="px-4 py-2 text-gray-600">RTX 3090/4090</td></tr>
+                    <tr><td class="px-4 py-2 text-gray-800">Llama 2 13B</td><td class="px-4 py-2">13B</td><td class="px-4 py-2">26GB</td><td class="px-4 py-2">34GB</td><td class="px-4 py-2 text-gray-600">RTX 4090 + 8GB</td></tr>
+                    <tr><td class="px-4 py-2 text-gray-800">Llama 2 70B</td><td class="px-4 py-2">70B</td><td class="px-4 py-2">140GB</td><td class="px-4 py-2">182GB</td><td class="px-4 py-2 text-gray-600">A100 80GB x2</td></tr>
+                    <tr><td class="px-4 py-2 text-gray-800">Mixtral 8x7B</td><td class="px-4 py-2">47B</td><td class="px-4 py-2">94GB</td><td class="px-4 py-2">122GB</td><td class="px-4 py-2 text-gray-600">A100 80GB x2</td></tr>
+                    <tr><td class="px-4 py-2 text-gray-800">Qwen 72B</td><td class="px-4 py-2">72B</td><td class="px-4 py-2">144GB</td><td class="px-4 py-2">187GB</td><td class="px-4 py-2 text-gray-600">H100 80GB x3</td></tr>
+                </tbody>
+            </table>
+        </div>
+    </main>
+
+    <script>
+        let categories = [];
+
+        // 加载导航栏
+        async function loadNav() {
+            const res = await fetch('/api/categories');
+            categories = await res.json();
+
+            const builtinPages = [
+                {name: '首页', href: '/'},
+                {name: '工具', href: '/tools'},
+                {name: '对比', href: '/compare'},
+                {name: '知识库', href: '/knowledge'}
+            ];
+
+            const categoryPages = {
+                'ai-models': '/models',
+                'gpus': '/gpus',
+                'cpus': '/cpus'
+            };
+
+            let navHtml = '';
+            builtinPages.forEach(p => {
+                const isActive = window.location.pathname === p.href;
+                navHtml += `<a href="${p.href}" class="${isActive ? 'text-indigo-600 font-medium' : 'text-gray-600 hover:text-indigo-600'}">${p.name}</a>`;
+            });
+
+            categories.forEach(cat => {
+                const href = categoryPages[cat.id] || `/category/${cat.id}`;
+                const isActive = window.location.pathname === href;
+                navHtml += `<a href="${href}" class="${isActive ? 'text-indigo-600 font-medium' : 'text-gray-600 hover:text-indigo-600'}">${cat.name}</a>`;
+            });
+
+            document.getElementById('topNav').innerHTML = navHtml;
+        }
+async function calculateVram() {
+            const params = document.getElementById('params').value;
+            const precision = document.getElementById('precision').value;
+            
+            const res = await fetch(`/api/calculate/vram?params=${params}&precision=${precision}`);
+            const data = await res.json();
+            
+            document.getElementById('modelVram').textContent = data.model_vram + ' GB';
+            document.getElementById('totalVram').textContent = data.total_vram + ' GB';
+            
+            // 推荐GPU
+            const gpuList = document.getElementById('gpuList');
+            if (data.suitable_gpus && data.suitable_gpus.length > 0) {
+                gpuList.innerHTML = data.suitable_gpus.map(g => `
+                    <div class="p-3 bg-green-50 rounded-lg border border-green-200">
+                        <div class="font-medium text-green-800">${g.name}</div>
+                        <div class="text-sm text-green-600">${g.memory_gb}GB显存</div>
+                    </div>
+                `).join('');
+            } else {
+                gpuList.innerHTML = `<div class="p-3 bg-red-50 rounded-lg text-red-600 col-span-3">暂无合适的GPU，请考虑INT4量化或多卡方案</div>`;
+            }
+            
+            document.getElementById('vramResult').classList.remove('hidden');
+        }
+
+        // 初始化
+        loadNav();
+    </script>
+</body>
+</html>
\ No newline at end of file

模型	参数量	模型权重	推荐显存	推荐GPU
Mistral 7B	7B	14GB	18GB	RTX 3090/4090
Llama 2 13B	13B	26GB	34GB	RTX 4090 + 8GB
Llama 2 70B	70B	140GB	182GB	A100 80GB x2
Mixtral 8x7B	47B	94GB	122GB	A100 80GB x2
Qwen 72B	72B	144GB	187GB	H100 80GB x3