fix(StudyDetailPage): 调整评论区域滚动偏移量并重新计算容器高度

将评论区域的滚动偏移量从30调整为20，以提高用户体验。同时，在点击课程时重新计算顶部和底部容器的高度，确保布局正确

@@ -332,7 +332,7 @@ const handleScroll = () => {
     if (!introElement || !commentElement) return;
     if (!introElement || !commentElement) return;
 
 
     const scrollTop = window.scrollY;
     const scrollTop = window.scrollY;
-    const commentOffset = commentElement.offsetTop - parseInt(topWrapperHeight.value) - 30; // 30是一个偏移量
+    const commentOffset = commentElement.offsetTop - parseInt(topWrapperHeight.value) - 20; // 20是一个偏移量
 
 
     // 根据滚动位置更新activeTab
     // 根据滚动位置更新activeTab
     if (scrollTop >= commentOffset) {
     if (scrollTop >= commentOffset) {
@@ -365,6 +365,18 @@ const handleLessonClick = async (lesson) => {
             commentList.value = comment.data.comment_list;
             commentList.value = comment.data.comment_list;
             commentCount.value = comment.data.comment_count;
             commentCount.value = comment.data.comment_count;
         }
         }
+
+        // 重新计算顶部和底部容器的高度
+        nextTick(() => {
+            const topWrapper = document.querySelector('.top-wrapper');
+            const bottomWrapper = document.querySelector('.bottom-wrapper');
+            if (topWrapper) {
+                topWrapperHeight.value = topWrapper.clientHeight + 'px';
+            }
+            if (bottomWrapper) {
+                bottomWrapperHeight.value = bottomWrapper.clientHeight + 'px';
+            }
+        });
     }
     }
 };
 };