feat: PDF对比用PDF.js渲染+滚动同步

static/css/style.css

@@ -75,12 +75,21 @@ body {
     display: grid;
     grid-template-columns: 1fr 1fr;
     gap: 20px;
+    height: 70vh;
 }
 
 .compare-panel {
     padding: 15px;
     border-radius: 5px;
     background-color: #f8f9fa;
+    overflow-y: auto;
+    height: 100%;
+}
+
+.compare-panel h5 {
+    margin-bottom: 10px;
+    padding-bottom: 5px;
+    border-bottom: 1px solid #ddd;
 }
 
 .compare-panel.original {
@@ -91,6 +100,27 @@ body {
     border-left: 4px solid var(--success-color);
 }
 
+.compare-panel iframe {
+    width: 100%;
+    height: calc(100% - 40px);
+    border: none;
+}
+
+#pdfContainer {
+    height: calc(100% - 40px);
+    overflow-y: auto;
+}
+
+#pdfPages {
+    padding: 10px;
+}
+
+.pdf-page-canvas {
+    border: 1px solid #ddd;
+    border-radius: 3px;
+    background: white;
+}
+
 /* 会员卡片 */
 .pricing-card {
     transition: transform 0.3s ease;