diff --git a/frontend/src/components/PostManageMenu.tsx b/frontend/src/components/PostManageMenu.tsx
new file mode 100644
index 0000000..46e2e16
--- /dev/null
+++ b/frontend/src/components/PostManageMenu.tsx
@@ -0,0 +1,189 @@
+import {
+  Ban,
+  CircleCheck,
+  CircleHelp,
+  EllipsisVertical,
+  History,
+  Lock,
+  LockOpen,
+  MessageSquareOff,
+  Pencil,
+  Pin,
+  Sparkles,
+  Trash2,
+} from 'lucide-react';
+import { Button } from '@/components/ui/button';
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuLabel,
+  DropdownMenuSeparator,
+  DropdownMenuTrigger,
+} from '@/components/ui/dropdown-menu';
+import type { PostItem } from '../api/types';
+
+export interface PostManageMenuProps {
+  post: PostItem;
+  isAdmin: boolean;
+  isOwnerOrAdmin: boolean;
+  canEdit: boolean;
+  isEdited: boolean;
+  isMobile?: boolean;
+  editRemaining?: string;
+  editBlockReason?: string;
+  deleting?: boolean;
+  onEdit: () => void;
+  onShowRevisions: () => void;
+  onToggleResolved: () => void;
+  onApprove: () => void;
+  onReject: () => void;
+  onFeature: () => void;
+  onPin: () => void;
+  onBoardPin: () => void;
+  onLock: () => void;
+  onCommentsLock: () => void;
+  onDelete: () => void;
+}
+
+/** 帖子右上角管理菜单：编辑、审核、置顶、锁定、删除等 */
+export default function PostManageMenu({
+  post,
+  isAdmin,
+  isOwnerOrAdmin,
+  canEdit,
+  isEdited,
+  isMobile,
+  editRemaining,
+  editBlockReason,
+  deleting,
+  onEdit,
+  onShowRevisions,
+  onToggleResolved,
+  onApprove,
+  onReject,
+  onFeature,
+  onPin,
+  onBoardPin,
+  onLock,
+  onCommentsLock,
+  onDelete,
+}: PostManageMenuProps) {
+  const showContent =
+    canEdit
+    || (isOwnerOrAdmin && isEdited)
+    || (isOwnerOrAdmin && post.post_type === 'question');
+  const hint = editRemaining || (!canEdit && isOwnerOrAdmin ? editBlockReason : '') || '';
+
+  if (!showContent && !isAdmin && !hint) return null;
+
+  return (
+    <DropdownMenu>
+      <DropdownMenuTrigger asChild>
+        <Button
+          variant="ghost"
+          size="sm"
+          className="post-manage-menu-trigger"
+          aria-label="管理帖子"
+        >
+          {!isMobile && <span>管理</span>}
+          <EllipsisVertical size={16} aria-hidden />
+        </Button>
+      </DropdownMenuTrigger>
+      <DropdownMenuContent align="end" className="post-manage-menu">
+        {hint && (
+          <>
+            <DropdownMenuLabel className="post-manage-menu-hint">
+              {hint}
+            </DropdownMenuLabel>
+            <DropdownMenuSeparator />
+          </>
+        )}
+
+        {showContent && (
+          <>
+            <DropdownMenuLabel>内容</DropdownMenuLabel>
+            {canEdit && (
+              <DropdownMenuItem onSelect={onEdit}>
+                <Pencil size={14} aria-hidden />
+                编辑
+              </DropdownMenuItem>
+            )}
+            {isOwnerOrAdmin && isEdited && (
+              <DropdownMenuItem onSelect={onShowRevisions}>
+                <History size={14} aria-hidden />
+                编辑历史
+              </DropdownMenuItem>
+            )}
+            {isOwnerOrAdmin && post.post_type === 'question' && (
+              <DropdownMenuItem onSelect={onToggleResolved}>
+                {post.question_resolved
+                  ? <CircleHelp size={14} aria-hidden />
+                  : <CircleCheck size={14} aria-hidden />}
+                {post.question_resolved ? '标为未解决' : '标为已解决'}
+              </DropdownMenuItem>
+            )}
+            {isAdmin && <DropdownMenuSeparator />}
+          </>
+        )}
+
+        {isAdmin && (
+          <>
+            <DropdownMenuLabel>审核</DropdownMenuLabel>
+            {(post.status === 'pending' || post.status === 'rejected') && (
+              <DropdownMenuItem onSelect={onApprove}>
+                <CircleCheck size={14} aria-hidden />
+                通过审核
+              </DropdownMenuItem>
+            )}
+            {post.status !== 'rejected' && (
+              <DropdownMenuItem onSelect={onReject}>
+                <Ban size={14} aria-hidden />
+                拒绝并通知
+              </DropdownMenuItem>
+            )}
+            <DropdownMenuSeparator />
+
+            <DropdownMenuLabel>展示</DropdownMenuLabel>
+            <DropdownMenuItem onSelect={onFeature}>
+              <Sparkles size={14} aria-hidden />
+              {post.featured ? '取消精华' : '设为精华'}
+            </DropdownMenuItem>
+            <DropdownMenuItem onSelect={onPin}>
+              <Pin size={14} aria-hidden />
+              {post.pinned ? '取消全局置顶' : '全局置顶'}
+            </DropdownMenuItem>
+            <DropdownMenuItem onSelect={onBoardPin}>
+              <Pin size={14} aria-hidden />
+              {post.board_pinned ? '取消板块置顶' : '板块置顶'}
+            </DropdownMenuItem>
+            <DropdownMenuSeparator />
+
+            <DropdownMenuLabel>讨论</DropdownMenuLabel>
+            <DropdownMenuItem onSelect={onLock}>
+              <Lock size={14} aria-hidden />
+              {post.edit_locked ? '解锁编辑' : '锁定编辑'}
+            </DropdownMenuItem>
+            <DropdownMenuItem onSelect={onCommentsLock}>
+              {post.comments_locked
+                ? <LockOpen size={14} aria-hidden />
+                : <MessageSquareOff size={14} aria-hidden />}
+              {post.comments_locked ? '开放讨论' : '锁定讨论'}
+            </DropdownMenuItem>
+            <DropdownMenuSeparator />
+
+            <DropdownMenuLabel>危险</DropdownMenuLabel>
+            <DropdownMenuItem
+              className="text-destructive focus:text-destructive"
+              disabled={deleting}
+              onSelect={onDelete}
+            >
+              <Trash2 size={14} aria-hidden />
+              删除
+            </DropdownMenuItem>
+          </>
+        )}
+      </DropdownMenuContent>
+    </DropdownMenu>
+  );
+}
diff --git a/frontend/src/pages/PostDetailPage.tsx b/frontend/src/pages/PostDetailPage.tsx
index 849a096..4e49643 100644
--- a/frontend/src/pages/PostDetailPage.tsx
+++ b/frontend/src/pages/PostDetailPage.tsx
@@ -1,6 +1,6 @@
 import { useState, useEffect, useLayoutEffect, useRef, useCallback } from 'react';
 import { useParams, useNavigate, useOutletContext, useLocation } from 'react-router-dom';
-import { ArrowLeft, ThumbsUp, Star, Pencil, Pin, History, Lock, LockOpen, MessageSquare, MessageSquareOff, Trash2, Sparkles, Flag, Ban, CircleCheck, CircleHelp, MoreHorizontal } from 'lucide-react';
+import { ArrowLeft, ThumbsUp, Star, Lock, MessageSquare, MessageSquareOff, Flag, MoreHorizontal } from 'lucide-react';
 import FeaturedIcon from '@/components/FeaturedIcon';
 import { Button } from '@/components/ui/button';
 import { Badge } from '@/components/ui/badge';
@@ -16,7 +16,6 @@ import {
   AlertDialogFooter,
   AlertDialogHeader,
   AlertDialogTitle,
-  AlertDialogTrigger,
 } from '@/components/ui/alert-dialog';
 import {
   DropdownMenu,
@@ -44,6 +43,7 @@ import PostBountyBanner from '../components/PostBountyBanner';
 import { findCommentFloor } from '../utils/bounty';
 import PostLotteryCard from '../components/PostLotteryCard';
 import PostRevisionPanel from '../components/PostRevisionPanel';
+import PostManageMenu from '../components/PostManageMenu';
 import ArticleOutline from '../components/ArticleOutline';
 import { useAuth } from '../hooks/useAuth';
 import { joinSEOKeywords, usePageSEO } from '../hooks/usePageSEO';
@@ -102,6 +102,8 @@ export default function PostDetailPage() {
   const [editWindowHours, setEditWindowHours] = useState(0);
   const [showRevisions, setShowRevisions] = useState(false);
   const [deletingPost, setDeletingPost] = useState(false);
+  const [deleteOpen, setDeleteOpen] = useState(false);
+  const [composerOpen, setComposerOpen] = useState(false);
   const [headings, setHeadings] = useState<PostHeading[]>([]);
   const [reportOpen, setReportOpen] = useState(false);
   const [reportReason, setReportReason] = useState<ReportReason>('spam');
@@ -186,6 +188,7 @@ export default function PostDetailPage() {
     }
     setReplyTo(null);
     setEditingCommentId(null);
+    setComposerOpen(false);
     setHeadings([]);
     const seq = ++loadSeq.current;
     setLoading(true);
@@ -244,15 +247,54 @@ export default function PostDetailPage() {
     }
   }, [postId]);
 
-  const scrollToCommentBox = useCallback(() => {
-    const target = commentBoxRef.current || commentSectionRef.current;
-    target?.scrollIntoView({ behavior: 'smooth', block: 'center' });
-    window.setTimeout(() => {
-      const ta = commentBoxRef.current?.querySelector('textarea');
-      ta?.focus({ preventScroll: true });
-    }, 320);
+  const focusCommentEditor = useCallback(() => {
+    const root = commentBoxRef.current;
+    if (!root) return;
+    const editable = root.querySelector<HTMLElement>('.ProseMirror, [contenteditable="true"]');
+    editable?.focus({ preventScroll: true });
   }, []);
 
+  const scrollToCommentBox = useCallback(() => {
+    setComposerOpen(true);
+    // 等折叠条展开后再滚入视口并聚焦 TipTap
+    window.setTimeout(() => {
+      const target = commentBoxRef.current || commentSectionRef.current;
+      target?.scrollIntoView({ behavior: 'smooth', block: 'center' });
+      window.setTimeout(focusCommentEditor, 80);
+    }, 50);
+  }, [focusCommentEditor]);
+
+  // 手机端展开输入框后聚焦编辑器
+  useEffect(() => {
+    if (!composerOpen || !isMobile) return;
+    const timer = window.setTimeout(focusCommentEditor, 60);
+    return () => window.clearTimeout(timer);
+  }, [composerOpen, isMobile, focusCommentEditor]);
+
+  // 手机端：焦点离开评论输入区（含工具栏）后收起为「说点什么…」
+  useEffect(() => {
+    if (!isMobile || !composerOpen) return;
+    const root = commentBoxRef.current;
+    if (!root) return;
+
+    const onFocusOut = (e: FocusEvent) => {
+      const next = e.relatedTarget as Node | null;
+      if (next && root.contains(next)) return;
+
+      // 等焦点真正落定（工具栏 / Dialog / 系统弹窗）后再判断是否收起
+      window.setTimeout(() => {
+        const active = document.activeElement;
+        if (active && root.contains(active)) return;
+        // 代码块 Dialog 等浮层打开时不收起
+        if (document.querySelector('[role="dialog"][data-state="open"]')) return;
+        setComposerOpen(false);
+      }, 50);
+    };
+
+    root.addEventListener('focusout', onFocusOut);
+    return () => root.removeEventListener('focusout', onFocusOut);
+  }, [isMobile, composerOpen]);
+
   const jumpToFloor = useCallback((floor: number) => {
     const el = document.getElementById(`floor-${floor}`);
     if (!el) return false;
@@ -468,6 +510,7 @@ export default function PostDetailPage() {
       });
       setReplyTo(null);
       setSubmitCount(c => c + 1);
+      if (isMobile) setComposerOpen(false);
       notify.success(r.message || (r.status === 'pending' ? '评论已提交审核' : '评论成功'));
       await Promise.all([reloadComments(), reloadPostContent()]);
       setTimeout(() => jumpToFloor(r.floor), 100);
@@ -738,12 +781,38 @@ export default function PostDetailPage() {
     <article className="page-wrap post-detail-page" ref={pageRef}>
       <div className="post-detail-header">
         <div className="post-detail-nav">
-          <Button variant="ghost" size="sm" onClick={() => nav(-1)}>
-            <ArrowLeft />
-            返回
-          </Button>
-          {post.board && (
-            <BoardBadge board={post.board} className="post-detail-board-tag" />
+          <div className="post-detail-nav-left">
+            <Button variant="ghost" size="sm" onClick={() => nav(-1)}>
+              <ArrowLeft />
+              返回
+            </Button>
+            {post.board && (
+              <BoardBadge board={post.board} className="post-detail-board-tag" />
+            )}
+          </div>
+          {(isOwnerOrAdmin || canEdit || isAdmin) && (
+            <PostManageMenu
+              post={post}
+              isAdmin={isAdmin}
+              isOwnerOrAdmin={isOwnerOrAdmin}
+              canEdit={canEdit}
+              isEdited={isEdited}
+              isMobile={isMobile}
+              editRemaining={editRemaining}
+              editBlockReason={editBlockReason}
+              deleting={deletingPost}
+              onEdit={() => nav(`/post/${postId}/edit`)}
+              onShowRevisions={() => setShowRevisions(true)}
+              onToggleResolved={handleToggleResolved}
+              onApprove={handleApprove}
+              onReject={() => setRejectOpen(true)}
+              onFeature={handleFeature}
+              onPin={handlePin}
+              onBoardPin={handleBoardPin}
+              onLock={handleLock}
+              onCommentsLock={handleCommentsLock}
+              onDelete={() => setDeleteOpen(true)}
+            />
           )}
         </div>
 
@@ -943,101 +1012,32 @@ export default function PostDetailPage() {
               </DropdownMenu>
             ) : null}
           </div>
-
-          {(isOwnerOrAdmin || canEdit || isAdmin) && (
-            <div className="post-detail-actions-manage">
-              {isOwnerOrAdmin && post.post_type === 'question' && (
-                <Button
-                  variant={post.question_resolved ? 'outline' : 'default'}
-                  size="sm"
-                  onClick={handleToggleResolved}
-                >
-                  {post.question_resolved ? <CircleHelp /> : <CircleCheck />}
-                  {post.question_resolved ? '标为未解决' : '标为已解决'}
-                </Button>
-              )}
-              {canEdit && (
-                <Button variant="outline" size="sm" onClick={() => nav(`/post/${postId}/edit`)}>
-                  <Pencil />
-                  编辑
-                </Button>
-              )}
-              {isOwnerOrAdmin && isEdited && (
-                <Button variant="outline" size="sm" onClick={() => setShowRevisions(true)}>
-                  <History />
-                  编辑历史
-                </Button>
-              )}
-              {isAdmin && (
-                <AlertDialog>
-                  <AlertDialogTrigger asChild>
-                    <Button variant="outline" size="sm" disabled={deletingPost}>
-                      <Trash2 />
-                      删除
-                    </Button>
-                  </AlertDialogTrigger>
-                  <AlertDialogContent>
-                    <AlertDialogHeader>
-                      <AlertDialogTitle>确定删除该帖子？</AlertDialogTitle>
-                      <AlertDialogDescription>
-                        帖子与评论将移入回收站，可在后台恢复或永久删除。普通用户不可自行删除内容。
-                      </AlertDialogDescription>
-                    </AlertDialogHeader>
-                    <AlertDialogFooter>
-                      <AlertDialogCancel>取消</AlertDialogCancel>
-                      <AlertDialogAction onClick={handleDeletePost}>删除</AlertDialogAction>
-                    </AlertDialogFooter>
-                  </AlertDialogContent>
-                </AlertDialog>
-              )}
-              {editRemaining && (
-                <span className="post-detail-edit-hint">{editRemaining}</span>
-              )}
-              {isOwnerOrAdmin && !canEdit && editBlockReason && (
-                <span className="post-detail-edit-hint" title={editBlockReason}>
-                  {editBlockReason}
-                </span>
-              )}
-              {isAdmin && (
-                <>
-                  {(post.status === 'pending' || post.status === 'rejected') && (
-                    <Button variant="default" size="sm" onClick={handleApprove}>
-                      通过审核
-                    </Button>
-                  )}
-                  <Button variant="outline" size="sm" onClick={handleFeature}>
-                    <Sparkles />
-                    {post.featured ? '取消精华' : '设为精华'}
-                  </Button>
-                  <Button variant="outline" size="sm" onClick={handlePin}>
-                    <Pin />
-                    {post.pinned ? '取消全局置顶' : '全局置顶'}
-                  </Button>
-                  <Button variant="outline" size="sm" onClick={handleBoardPin}>
-                    <Pin />
-                    {post.board_pinned ? '取消板块置顶' : '板块置顶'}
-                  </Button>
-                  <Button variant="outline" size="sm" onClick={handleLock}>
-                    <Lock />
-                    {post.edit_locked ? '解锁编辑' : '锁定编辑'}
-                  </Button>
-                  <Button variant="outline" size="sm" onClick={handleCommentsLock}>
-                    {post.comments_locked ? <LockOpen /> : <MessageSquareOff />}
-                    {post.comments_locked ? '开放讨论' : '锁定讨论'}
-                  </Button>
-                  {post.status !== 'rejected' && (
-                    <Button variant="outline" size="sm" onClick={() => setRejectOpen(true)}>
-                      <Ban />
-                      拒绝并通知
-                    </Button>
-                  )}
-                </>
-              )}
-            </div>
-          )}
         </div>
       </div>
 
+      <AlertDialog open={deleteOpen} onOpenChange={setDeleteOpen}>
+        <AlertDialogContent>
+          <AlertDialogHeader>
+            <AlertDialogTitle>确定删除该帖子？</AlertDialogTitle>
+            <AlertDialogDescription>
+              帖子与评论将移入回收站，可在后台恢复或永久删除。普通用户不可自行删除内容。
+            </AlertDialogDescription>
+          </AlertDialogHeader>
+          <AlertDialogFooter>
+            <AlertDialogCancel disabled={deletingPost}>取消</AlertDialogCancel>
+            <AlertDialogAction
+              disabled={deletingPost}
+              onClick={(e) => {
+                e.preventDefault();
+                void handleDeletePost();
+              }}
+            >
+              删除
+            </AlertDialogAction>
+          </AlertDialogFooter>
+        </AlertDialogContent>
+      </AlertDialog>
+
       <Dialog open={reportOpen} onOpenChange={setReportOpen}>
         <DialogContent>
           <DialogHeader>
@@ -1122,7 +1122,45 @@ export default function PostDetailPage() {
           </div>
         ) : !replyTo && (
           <div className="comment-box-wrap" ref={commentBoxRef}>
-            <CommentBox {...commentBoxProps} />
+            {isMobile && !composerOpen && (
+              <button
+                type="button"
+                className="comment-composer-collapsed"
+                onClick={() => {
+                  if (!user) {
+                    requireLogin('评论');
+                    return;
+                  }
+                  setComposerOpen(true);
+                  window.requestAnimationFrame(() => {
+                    window.setTimeout(focusCommentEditor, 50);
+                  });
+                }}
+              >
+                {user ? (
+                  <>
+                    <span className="comment-composer-collapsed-avatar" aria-hidden>
+                      {user.avatar
+                        ? <img src={user.avatar} alt="" loading="lazy" decoding="async" />
+                        : (user.nickname?.[0] || '?')}
+                    </span>
+                    <span className="comment-composer-collapsed-placeholder">说点什么…</span>
+                  </>
+                ) : (
+                  <span className="comment-composer-collapsed-placeholder">登录后即可评论</span>
+                )}
+              </button>
+            )}
+            <div
+              className={
+                isMobile && !composerOpen
+                  ? 'comment-box-expanded-slot is-collapsed'
+                  : 'comment-box-expanded-slot'
+              }
+              aria-hidden={isMobile && !composerOpen}
+            >
+              <CommentBox {...commentBoxProps} />
+            </div>
           </div>
         )}
 
diff --git a/frontend/src/styles/global.css b/frontend/src/styles/global.css
index 82e0b87..68bdc11 100644
--- a/frontend/src/styles/global.css
+++ b/frontend/src/styles/global.css
@@ -4308,12 +4308,40 @@ a.post-title:visited {
 .post-detail-nav {
   display: flex;
   align-items: center;
+  justify-content: space-between;
   gap: 8px;
   margin-bottom: 8px;
 }
 
+.post-detail-nav-left {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  min-width: 0;
+}
+
 .post-detail-board-tag { margin: 0 !important; }
 
+.post-manage-menu-trigger {
+  flex-shrink: 0;
+  gap: 4px;
+  color: var(--color-text-2);
+}
+
+.post-manage-menu {
+  max-height: 70vh;
+  overflow-y: auto;
+  min-width: 11.5rem;
+}
+
+.post-manage-menu-hint {
+  font-weight: 400 !important;
+  font-size: 12px !important;
+  color: var(--color-text-3) !important;
+  white-space: normal;
+  line-height: 1.4;
+}
+
 .post-detail-head { margin-bottom: 12px; }
 
 .post-detail-title {
@@ -4379,12 +4407,6 @@ a.post-title:visited {
   font-size: 0.875rem;
 }
 
-.post-detail-edit-hint {
-  font-size: 12px;
-  color: var(--color-text-3);
-  align-self: center;
-}
-
 .post-revision-overlay {
   position: fixed;
   inset: 0;
@@ -4960,8 +4982,7 @@ a.post-title:visited {
   position: relative;
 }
 
-.post-detail-actions-primary,
-.post-detail-actions-manage {
+.post-detail-actions-primary {
   display: flex;
   flex-wrap: wrap;
   justify-content: center;
@@ -4969,12 +4990,6 @@ a.post-title:visited {
   gap: 8px;
 }
 
-.post-detail-actions-manage {
-  width: 100%;
-  padding-top: 12px;
-  border-top: 1px dashed var(--j13-border-light);
-}
-
 .post-detail-more-btn {
   min-width: 36px;
   padding-inline: 10px;
@@ -6215,6 +6230,61 @@ a.post-title:visited {
   flex-shrink: 0;
 }
 
+.comment-box-expanded-slot.is-collapsed {
+  display: none;
+}
+
+.comment-composer-collapsed {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  width: 100%;
+  min-height: 44px;
+  padding: 8px 12px;
+  border: 1px solid var(--j13-border-light);
+  border-radius: 999px;
+  background: var(--j13-bg-workspace, hsl(var(--muted)));
+  color: var(--color-text-3);
+  font-size: 14px;
+  text-align: left;
+  cursor: pointer;
+  transition: border-color 0.15s ease, background 0.15s ease;
+}
+
+.comment-composer-collapsed:hover {
+  border-color: color-mix(in srgb, var(--j13-green) 40%, var(--j13-border-light));
+  background: var(--j13-bg-surface);
+}
+
+.comment-composer-collapsed-avatar {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  width: 28px;
+  height: 28px;
+  border-radius: 50%;
+  overflow: hidden;
+  flex-shrink: 0;
+  background: color-mix(in srgb, var(--j13-green) 18%, transparent);
+  color: var(--j13-green);
+  font-size: 12px;
+  font-weight: 600;
+}
+
+.comment-composer-collapsed-avatar img {
+  width: 100%;
+  height: 100%;
+  object-fit: cover;
+}
+
+.comment-composer-collapsed-placeholder {
+  flex: 1;
+  min-width: 0;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
 .comment-box-wrap.inline {
   padding: 12px 0 4px;
   border-bottom: none;
@@ -7096,8 +7166,7 @@ a.waline-comment-author:hover {
   .post-detail-header { padding: 12px 14px 16px; }
   .post-detail-title { font-size: 17px; }
   .post-detail-actions { margin-top: 20px; padding-top: 16px; gap: 10px; }
-  .post-detail-actions-primary,
-  .post-detail-actions-manage { gap: 8px; }
+  .post-detail-actions-primary { gap: 8px; }
   .comment-section-bar { padding: 12px 14px 10px; }
   .comment-section-bar::after { left: 14px; width: 32px; }
   .comment-section:hover .comment-section-bar::after { width: 46px; }