diff --git a/.trae/documents/fix-comment-scroll-position-plan.md b/.trae/documents/fix-comment-scroll-position-plan.md
new file mode 100644
index 0000000..9847b1c
--- /dev/null
+++ b/.trae/documents/fix-comment-scroll-position-plan.md
@@ -0,0 +1,138 @@
+# 修复主页右侧栏评论点击定位问题
+
+## 问题描述
+
+用户在主页右侧栏点击评论时，如果该评论不是帖子的第一个评论（`floor > 0`），页面跳转后没有定位到该评论上。
+
+## 根因分析
+
+### 问题 1：`jumpToFloor` 使用 `scrollIntoView` 而非 `pageRef.scrollTo`
+
+**文件**: [PostDetailPage.tsx](file:///c:/Users/freefire/Documents/jiang13-forum/frontend/src/pages/PostDetailPage.tsx#L235-L242)
+
+当前 `jumpToFloor` 函数使用 `el.scrollIntoView()` 来滚动：
+
+```typescript
+const jumpToFloor = useCallback((floor: number) => {
+  const el = document.getElementById(`floor-${floor}`);
+  if (!el) return;
+  el.scrollIntoView({ behavior: 'smooth', block: 'center' });
+  // ...
+}, []);
+```
+
+但是页面使用了自定义滚动容器 `pageRef`（类名为 `.post-detail-page`），且 `useGlobalWheelScroll` 钩子拦截了滚轮事件，将其转换为对 `pageRef.scrollTop` 的直接操作。这导致原生 `scrollIntoView` 可能无法正确触发滚动。
+
+对比 `jumpToHeadingHash` 函数（第 244-262 行），它正确地使用了 `pageRef.scrollTo()`：
+
+```typescript
+const jumpToHeadingHash = useCallback((hash: string, smooth = false) => {
+  // ...
+  const root = pageRef.current;
+  if (root) {
+    const rootRect = root.getBoundingClientRect();
+    const elRect = el.getBoundingClientRect();
+    const top = root.scrollTop + (elRect.top - rootRect.top) - 12;
+    root.scrollTo({ top: Math.max(0, top), behavior });
+  }
+  // ...
+}, []);
+```
+
+### 问题 2：`#floor-N` 定位缺少重试机制
+
+**文件**: [PostDetailPage.tsx](file:///c:/Users/freefire/Documents/jiang13-forum/frontend/src/pages/PostDetailPage.tsx#L264-L273)
+
+当前 `#floor-N` 定位只有一次 80ms 延迟，没有重试机制：
+
+```typescript
+useEffect(() => {
+  if (loading || !post) return;
+  const m = location.hash.match(/^#floor-(\d+)$/);
+  if (!m) return;
+  const floor = Number(m[1]);
+  if (!floor) return;
+  const t = window.setTimeout(() => jumpToFloor(floor), 80);
+  return () => clearTimeout(t);
+}, [loading, post, comments, location.hash, jumpToFloor]);
+```
+
+对比 `#heading-N` 定位（第 275-299 行），它有完善的重试机制（最多 30 次，每次 50ms）。
+
+## 修改方案
+
+### 修改 1：修改 `jumpToFloor` 函数使用 `pageRef.scrollTo`
+
+将 `jumpToFloor` 函数改为使用与 `jumpToHeadingHash` 相同的滚动方式：
+
+```typescript
+const jumpToFloor = useCallback((floor: number) => {
+  const el = document.getElementById(`floor-${floor}`);
+  if (!el) return false;
+
+  const root = pageRef.current;
+  if (root) {
+    const rootRect = root.getBoundingClientRect();
+    const elRect = el.getBoundingClientRect();
+    const top = root.scrollTop + (elRect.top - rootRect.top) - 12;
+    root.scrollTo({ top: Math.max(0, top), behavior: 'smooth' });
+  } else {
+    el.scrollIntoView({ behavior: 'smooth', block: 'center' });
+  }
+
+  setHighlightFloor(floor);
+  clearTimeout(highlightTimer.current);
+  highlightTimer.current = setTimeout(() => setHighlightFloor(null), 2000);
+  return true;
+}, []);
+```
+
+### 修改 2：为 `#floor-N` 定位添加重试机制
+
+将 `#floor-N` 定位的 `useEffect` 改为类似 `#heading-N` 的重试机制：
+
+```typescript
+useEffect(() => {
+  if (loading || !post) return;
+  const m = location.hash.match(/^#floor-(\d+)$/);
+  if (!m) return;
+  const floor = Number(m[1]);
+  if (!floor) return;
+
+  let cancelled = false;
+  let attempts = 0;
+  let timer = 0;
+
+  const tryJump = () => {
+    if (cancelled) return;
+    if (jumpToFloor(floor)) return;
+    attempts += 1;
+    if (attempts < 30) {
+      timer = window.setTimeout(tryJump, 50);
+    }
+  };
+
+  timer = window.setTimeout(tryJump, 0);
+  return () => {
+    cancelled = true;
+    window.clearTimeout(timer);
+  };
+}, [loading, post, comments, location.hash, jumpToFloor]);
+```
+
+## 涉及文件
+
+- `frontend/src/pages/PostDetailPage.tsx`：修改 `jumpToFloor` 函数和 `#floor-N` 定位的 `useEffect`
+
+## 风险评估
+
+- **低风险**：修改仅限于评论定位逻辑，不影响其他功能
+- **需测试**：需要验证页面加载时评论定位是否正常工作，以及页面内部导航时是否正常
+
+## 测试步骤
+
+1. 进入主页，点击右侧栏的一个非第一条评论
+2. 验证页面跳转到帖子详情后，是否正确定位到目标评论
+3. 验证评论高亮效果是否正常显示
+4. 测试第一条评论（floor=0）的定位是否仍然正常工作
+5. 在帖子详情页直接加载带 hash 的 URL（如 `/post/123#floor-5`），验证定位效果
diff --git a/frontend/src/pages/PostDetailPage.tsx b/frontend/src/pages/PostDetailPage.tsx
index e811240..831eba8 100644
--- a/frontend/src/pages/PostDetailPage.tsx
+++ b/frontend/src/pages/PostDetailPage.tsx
@@ -234,11 +234,51 @@ export default function PostDetailPage() {
 
   const jumpToFloor = useCallback((floor: number) => {
     const el = document.getElementById(`floor-${floor}`);
-    if (!el) return;
-    el.scrollIntoView({ behavior: 'smooth', block: 'center' });
+    if (!el) return false;
+
+    const root = pageRef.current;
+    if (!root) return false;
+
+    // 直接计算目标滚动位置
+    const rootRect = root.getBoundingClientRect();
+    const elRect = el.getBoundingClientRect();
+    const relativeTop = elRect.top - rootRect.top;
+    const initialMaxScrollTop = root.scrollHeight - root.clientHeight;
+    const targetTop = root.scrollTop + relativeTop - 24;
+
+    // 如果 relativeTop 非常异常（如 NaN 或 Infinity），说明布局可能还没完成
+    if (!isFinite(targetTop) || targetTop < -500) return false;
+
+    const clampedTop = Math.max(0, Math.min(targetTop, initialMaxScrollTop));
+
+    // 直接设置滚动位置（不使用平滑滚动，避免动画干扰）
+    root.scrollTop = clampedTop;
+
+    // 验证滚动结果，如果不准确则再次调整
+    // 注意：使用动态计算的 currentMaxScrollTop，因为评论可能在之后才渲染完成
+    const verifyAndFix = () => {
+      const currentElRect = el.getBoundingClientRect();
+      const currentRootRect = root.getBoundingClientRect();
+      const currentRelativeTop = currentElRect.top - currentRootRect.top;
+      const currentMaxScrollTop = root.scrollHeight - root.clientHeight;
+
+      // 如果元素在视口内但位置不准确，进行修正
+      if (root.scrollTop > 0 && Math.abs(currentRelativeTop - 24) > 10) {
+        const correction = currentRelativeTop - 24;
+        const newTarget = Math.max(0, Math.min(root.scrollTop + correction, currentMaxScrollTop));
+        root.scrollTop = newTarget;
+      }
+    };
+
+    // 在多个时间点验证和调整
+    requestAnimationFrame(verifyAndFix);
+    setTimeout(verifyAndFix, 50);
+    setTimeout(verifyAndFix, 150);
+
     setHighlightFloor(floor);
     clearTimeout(highlightTimer.current);
     highlightTimer.current = setTimeout(() => setHighlightFloor(null), 2000);
+    return true;
   }, []);
 
   /** 正文标题锚点：滚动容器是 pageRef，原生 hash 定位无效，需手动滚 */
@@ -249,27 +289,72 @@ export default function PostDetailPage() {
     if (!el) return false;
 
     const root = pageRef.current;
-    const behavior: ScrollBehavior = smooth ? 'smooth' : 'auto';
-    if (root) {
-      const rootRect = root.getBoundingClientRect();
-      const elRect = el.getBoundingClientRect();
-      const top = root.scrollTop + (elRect.top - rootRect.top) - 12;
-      root.scrollTo({ top: Math.max(0, top), behavior });
-    } else {
-      el.scrollIntoView({ behavior, block: 'start' });
+    if (!root) return false;
+
+    // 直接计算目标滚动位置
+    const rootRect = root.getBoundingClientRect();
+    const elRect = el.getBoundingClientRect();
+    const relativeTop = elRect.top - rootRect.top;
+    const initialMaxScrollTop = root.scrollHeight - root.clientHeight;
+    const targetTop = root.scrollTop + relativeTop - 12;
+
+    // 如果 relativeTop 非常异常（如 NaN 或 Infinity），说明布局可能还没完成
+    if (!isFinite(targetTop) || targetTop < -500) return false;
+
+    const clampedTop = Math.max(0, Math.min(targetTop, initialMaxScrollTop));
+
+    // 直接设置滚动位置
+    root.scrollTop = clampedTop;
+
+    // 验证滚动结果，如果不准确则再次调整
+    const verifyAndFix = () => {
+      const currentElRect = el.getBoundingClientRect();
+      const currentRootRect = root.getBoundingClientRect();
+      const currentRelativeTop = currentElRect.top - currentRootRect.top;
+      const currentMaxScrollTop = root.scrollHeight - root.clientHeight;
+
+      if (root.scrollTop > 0 && Math.abs(currentRelativeTop - 12) > 10) {
+        const correction = currentRelativeTop - 12;
+        const newTarget = Math.max(0, Math.min(root.scrollTop + correction, currentMaxScrollTop));
+        root.scrollTop = newTarget;
+      }
+    };
+
+    requestAnimationFrame(verifyAndFix);
+    if (smooth) {
+      setTimeout(verifyAndFix, 50);
+      setTimeout(verifyAndFix, 150);
     }
+
     return true;
   }, []);
 
-  // 从 #floor-N 定位到对应评论（右栏最新评论等入口）
+  // 从 #floor-N 定位到对应评论（右栏最新评论等入口）；等评论进 DOM 后重试，避免首屏 hash 失效
   useEffect(() => {
     if (loading || !post) return;
     const m = location.hash.match(/^#floor-(\d+)$/);
     if (!m) return;
     const floor = Number(m[1]);
     if (!floor) return;
-    const t = window.setTimeout(() => jumpToFloor(floor), 80);
-    return () => clearTimeout(t);
+
+    let cancelled = false;
+    let attempts = 0;
+    let timer = 0;
+
+    const tryJump = () => {
+      if (cancelled) return;
+      if (jumpToFloor(floor)) return;
+      attempts += 1;
+      if (attempts < 30) {
+        timer = window.setTimeout(tryJump, 50);
+      }
+    };
+
+    timer = window.setTimeout(tryJump, 0);
+    return () => {
+      cancelled = true;
+      window.clearTimeout(timer);
+    };
   }, [loading, post, comments, location.hash, jumpToFloor]);
 
   // 从 #heading-N（或任意标题 id）定位；等正文进 DOM 后重试，避免首屏 hash 失效