fix: qych 内部滚动面板与整页翻屏不再冲突

新增 _isInsideScrollablePanel: wheel事件源在content-item1内时,
检查面板自身是否还能滚动。能滚→交给浏览器,不能→触发整页翻屏。

Co-Authored-By: Claude <noreply@anthropic.com>

txw-mhzc-web/src/pages/index/views/qych/index.vue

@@ -471,6 +471,21 @@ export default {
         this.setNavActive(sectionIndex - 1);
       }
     },
+    /** 检查事件源是否在可滚动面板内，且面板仍有滚动空间 */
+    _isInsideScrollablePanel(e, direction) {
+      let el = e.target;
+      while (el) {
+        if (el.classList && el.classList.contains('content-item1')) {
+          const atTop = el.scrollTop <= 1;
+          const atBottom = el.scrollTop + el.clientHeight >= el.scrollHeight - 1;
+          if (direction > 0 && !atBottom) return true;  // 向下滚，面板未到底
+          if (direction < 0 && !atTop) return true;     // 向上滚，面板未到顶
+          return false;
+        }
+        el = el.parentElement;
+      }
+      return false;
+    },
     handleWheel(e) {
       if (this.isScrolling) return;
       const delta = Math.abs(e.deltaY);
@@ -480,6 +495,12 @@ export default {
       if (!scrollRoot) return;
 
       const direction = e.deltaY > 0 ? 1 : -1;
+
+      // 如果事件来自内部滚动面板且面板还能滚，交给浏览器处理
+      if (this._isInsideScrollablePanel(e, direction)) {
+        return;
+      }
+
       const currentIndex = this.getCurrentSectionIndex(scrollRoot);
       const currentEl = document.getElementById(this.sectionIds[currentIndex]);