style(PdfViewer): 将主题色从蓝色改为绿色

 <!--
  * @Date: 2025-01-21
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2025-10-22 13:28:38
+ * @LastEditTime: 2025-10-22 13:32:48
  * @FilePath: /mlaj/src/components/ui/PdfViewer.vue
  * @Description: PDF预览组件 - 使用pdf-vue3库
 -->
@@ -770,9 +770,9 @@ const applyPinchZoom = (newZoom, centerX, centerY, container) => {
 }
 
 .zoom-btn:hover {
-    background: #1989fa;
+    background: #4caf50;
     color: #fff;
-    border-color: #1989fa;
+    border-color: #4caf50;
     transform: scale(1.1);
     box-shadow: 0 4px 12px rgba(25, 137, 250, 0.3);
 }
@@ -828,7 +828,7 @@ const applyPinchZoom = (newZoom, centerX, centerY, container) => {
 .progress-percent {
     font-size: 18px;
     font-weight: bold;
-    color: #1989fa;
+    color: #4caf50;
 }
 
 .loading-text {
@@ -878,7 +878,7 @@ const applyPinchZoom = (newZoom, centerX, centerY, container) => {
     width: 100%;
     height: 100%;
     background: rgba(255, 255, 255, 0.9);
-    border: 2px solid #1989fa;
+    border: 2px solid #4caf50;
     border-radius: 16px;
     text-align: center;
     font-size: 14px;