diff --git a/src/components/RepositoryCard.tsx b/src/components/RepositoryCard.tsx
index aeade326..933942f3 100644
--- a/src/components/RepositoryCard.tsx
+++ b/src/components/RepositoryCard.tsx
@@ -686,6 +686,14 @@ const RepositoryCardComponent: React.FC<RepositoryCardProps> = ({
   // 使用 ref 来跟踪是否已经处理了点击
   const isProcessingClickRef = useRef(false);
 
+  const hideDescriptionTooltip = useCallback(() => {
+    if (tooltipHideTimerRef.current) {
+      clearTimeout(tooltipHideTimerRef.current);
+      tooltipHideTimerRef.current = null;
+    }
+    setShowTooltip(false);
+  }, []);
+
   // 使用 useCallback 优化事件处理函数
   const handleCardClick = useCallback((event: React.MouseEvent<HTMLDivElement>) => {
     // 防止重复处理
@@ -726,9 +734,10 @@ const RepositoryCardComponent: React.FC<RepositoryCardProps> = ({
       return;
     }
 
-    // 打开 README 模态框
+    // 打开 README 模态框前隐藏描述悬浮提示，避免遮挡预览层
+    hideDescriptionTooltip();
     setReadmeModalOpen(true);
-  }, [selectionMode, onSelect, repository.id]);
+  }, [selectionMode, onSelect, repository.id, hideDescriptionTooltip]);
 
   // 处理鼠标按下事件，阻止焦点变化导致页面滚动
   const handleMouseDown = useCallback((event: React.MouseEvent<HTMLDivElement>) => {
@@ -749,12 +758,14 @@ const RepositoryCardComponent: React.FC<RepositoryCardProps> = ({
     if (event.key === 'Enter' || event.key === ' ') {
       event.preventDefault();
       if (selectionMode && onSelect) {
+        hideDescriptionTooltip();
         onSelect(repository.id);
       } else {
+        hideDescriptionTooltip();
         setReadmeModalOpen(true);
       }
     }
-  }, [selectionMode, onSelect, repository.id, isModalOpen]);
+  }, [selectionMode, onSelect, repository.id, isModalOpen, hideDescriptionTooltip]);
 
   // 使用 useMemo 缓存卡片类名，避免重复计算
   const cardClassName = useMemo(() => {
diff --git a/src/components/SubscriptionRepoCard.tsx b/src/components/SubscriptionRepoCard.tsx
index d2992773..b6b38fe9 100644
--- a/src/components/SubscriptionRepoCard.tsx
+++ b/src/components/SubscriptionRepoCard.tsx
@@ -65,6 +65,19 @@ export const SubscriptionRepoCard: React.FC<SubscriptionRepoCardProps> = ({ repo
     if (aiHideTimerRef.current) clearTimeout(aiHideTimerRef.current);
   }, []);
 
+  const hideFloatingTooltips = useCallback(() => {
+    if (descHideTimerRef.current) {
+      clearTimeout(descHideTimerRef.current);
+      descHideTimerRef.current = null;
+    }
+    if (aiHideTimerRef.current) {
+      clearTimeout(aiHideTimerRef.current);
+      aiHideTimerRef.current = null;
+    }
+    setDescTooltip(false);
+    setAiTooltip(false);
+  }, []);
+
   const abortControllerRef = useRef<AbortController | null>(null);
 
   useEffect(() => {
@@ -314,8 +327,9 @@ export const SubscriptionRepoCard: React.FC<SubscriptionRepoCardProps> = ({ repo
 
   // 点击卡片打开 README
   const handleCardClick = useCallback(() => {
+    hideFloatingTooltips();
     setReadmeModalOpen(true);
-  }, []);
+  }, [hideFloatingTooltips]);
 
   const cardTitle = repo.full_name || `${repo.owner?.login || ''}/${repo.name || ''}`;