diff --git a/backend/handler/comment.go b/backend/handler/comment.go
index fa8383b..ba2fdbc 100644
--- a/backend/handler/comment.go
+++ b/backend/handler/comment.go
@@ -36,6 +36,21 @@ func (h *Handlers) PostComments(c *gin.Context) {
 		c.JSON(http.StatusNotFound, gin.H{"error": "帖子不存在"})
 		return
 	}
+
+	if allow, err := h.Setting.AllowComments(); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "评论暂时不可用"})
+		return
+	} else if !allow {
+		c.JSON(http.StatusOK, gin.H{
+			"comments":       []any{},
+			"total":          0,
+			"total_comments": 0,
+			"page":           page,
+			"size":           size,
+		})
+		return
+	}
+
 	boardID, _ := h.Post.GetBoardID(uint(id))
 
 	comments, floors, totalComments, err := h.Comment.ListFloorPaged(uint(id), boardID, viewerID, actor, page, size)
@@ -70,7 +85,7 @@ func (h *Handlers) CreateComment(c *gin.Context) {
 		c.JSON(http.StatusInternalServerError, gin.H{"error": "评论暂时不可用"})
 		return
 	} else if !allow {
-		c.JSON(http.StatusForbidden, gin.H{"error": "站点已关闭评论"})
+		c.JSON(http.StatusForbidden, gin.H{"error": "本站不支持评论"})
 		return
 	}
 	var req CreateCommentRequest
diff --git a/backend/handler/user.go b/backend/handler/user.go
index ed232f7..736cb0b 100644
--- a/backend/handler/user.go
+++ b/backend/handler/user.go
@@ -151,6 +151,21 @@ func (h *Handlers) UserComments(c *gin.Context) {
 		return
 	}
 
+	if allow, err := h.Setting.AllowComments(); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "评论暂时不可用"})
+		return
+	} else if !allow {
+		page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
+		size, _ := strconv.Atoi(c.DefaultQuery("size", "20"))
+		c.JSON(http.StatusOK, gin.H{
+			"comments": []any{},
+			"total":    0,
+			"page":     page,
+			"size":     size,
+		})
+		return
+	}
+
 	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
 	size, _ := strconv.Atoi(c.DefaultQuery("size", "20"))
 
diff --git a/frontend/app/admin/announcements/AnnouncementAdmin.tsx b/frontend/app/admin/announcements/AnnouncementAdmin.tsx
index 2909dbb..9fa380c 100644
--- a/frontend/app/admin/announcements/AnnouncementAdmin.tsx
+++ b/frontend/app/admin/announcements/AnnouncementAdmin.tsx
@@ -25,6 +25,7 @@ import { toast } from "@/lib/toast";
 import ConfirmDialog from "@/components/ConfirmDialog";
 import {
   AdminEmpty,
+  AdminField,
   AdminIconButton,
   AdminPageHeader,
   AdminSegmented,
@@ -155,29 +156,24 @@ export default function AnnouncementAdmin({
               {form.id == null ? "新建公告" : "编辑公告"}
             </p>
 
-            <label className="field-label" htmlFor="anno-title">
-              标题
-            </label>
-            <input
+            <AdminField
               id="anno-title"
-              className="field mb-4"
+              className="mb-4"
+              label="标题"
               maxLength={200}
               value={form.title}
-              onChange={(e) => setForm({ ...form, title: e.target.value })}
+              onChange={(title) => setForm({ ...form, title })}
               placeholder="请输入公告标题"
             />
 
             <div className="flex items-end gap-4 mb-4 flex-wrap">
               <div className="w-36">
-                <label className="field-label" htmlFor="anno-tag">
-                  标签
-                </label>
-                <input
+                <AdminField
                   id="anno-tag"
-                  className="field"
+                  label="标签"
                   maxLength={32}
                   value={form.tag}
-                  onChange={(e) => setForm({ ...form, tag: e.target.value })}
+                  onChange={(tag) => setForm({ ...form, tag })}
                   placeholder="公告"
                 />
               </div>
@@ -213,14 +209,13 @@ export default function AnnouncementAdmin({
               />
             </div>
 
-            <label className="field-label" htmlFor="anno-content">
-              正文（支持 Markdown）
-            </label>
-            <textarea
+            <AdminField
               id="anno-content"
-              className="field min-h-[260px]"
+              label="正文（支持 Markdown）"
+              as="textarea"
+              minHeight="260px"
               value={form.content}
-              onChange={(e) => setForm({ ...form, content: e.target.value })}
+              onChange={(content) => setForm({ ...form, content })}
               placeholder="请输入公告正文，支持 Markdown 语法…"
             />
 
diff --git a/frontend/app/admin/appearance/AppearanceAdmin.tsx b/frontend/app/admin/appearance/AppearanceAdmin.tsx
index ee5a73e..dede63e 100644
--- a/frontend/app/admin/appearance/AppearanceAdmin.tsx
+++ b/frontend/app/admin/appearance/AppearanceAdmin.tsx
@@ -5,14 +5,22 @@ import { useRouter } from "next/navigation";
 import {
   Palette,
   Check,
+  Code2,
   Loader2,
   Save,
   Undo2,
   RotateCcw,
   Pipette,
+  Sparkles,
 } from "lucide-react";
-import { AdminPageHeader, AdminSection } from "@/components/admin";
-import { apiUpdateSiteSettings } from "@/lib/api";
+import {
+  AdminPageHeader,
+  AdminSection,
+  AdminSettingRow,
+  AdminStepper,
+  AdminSwitch,
+} from "@/components/admin";
+import { apiUpdateSiteSettings, type PublicSettings } from "@/lib/api";
 import { toast } from "@/lib/toast";
 import {
   ACCENT_PRESETS,
@@ -23,13 +31,27 @@ import {
   normalizeHex,
 } from "@/lib/theme";
 
-// 后台「外观设置」：站点主题色预设 + 自定义取色 + 实时预览。
-// 修改时立即对整页实时预览（仅本地），保存后才写库并对所有用户生效。
-export default function AppearanceAdmin({ initialAccent }: { initialAccent: string }) {
+// 后台「外观设置」：主题色、代码块折叠与界面动画。
+// 主题色修改时立即对整页实时预览（仅本地），保存后才写库并对所有用户生效。
+export default function AppearanceAdmin({ initial }: { initial: PublicSettings }) {
   const router = useRouter();
+  const initialAccent = initial.accent || "";
   // 已保存值：空串=内置默认（靛蓝）
-  const [savedHex, setSavedHex] = useState(initialAccent || "");
+  const [savedHex, setSavedHex] = useState(initialAccent);
   const [draft, setDraft] = useState(initialAccent || DEFAULT_ACCENT);
+  const [codeAutoFold, setCodeAutoFold] = useState(initial.code_block_auto_fold !== false);
+  const [foldLines, setFoldLines] = useState(
+    Number.isFinite(initial.code_block_fold_lines) ? initial.code_block_fold_lines : 5
+  );
+  const [togglingFold, setTogglingFold] = useState(false);
+  const [savingFoldLines, setSavingFoldLines] = useState(false);
+  const [uiAnimations, setUiAnimations] = useState(initial.ui_animations !== false);
+  const [animCodeFold, setAnimCodeFold] = useState(initial.anim_code_fold !== false);
+  const [animSmoothScroll, setAnimSmoothScroll] = useState(
+    initial.anim_smooth_scroll !== false
+  );
+  const [animChrome, setAnimChrome] = useState(initial.anim_chrome !== false);
+  const [togglingMotion, setTogglingMotion] = useState(false);
   const [saving, setSaving] = useState(false);
   const savedRef = useRef(savedHex);
   savedRef.current = savedHex;
@@ -76,12 +98,79 @@ export default function AppearanceAdmin({ initialAccent }: { initialAccent: stri
     applyAccentTheme(savedHex || null);
   };
 
+  const toggleCodeFold = async () => {
+    if (togglingFold) return;
+    const next = !codeAutoFold;
+    setTogglingFold(true);
+    try {
+      const res = await apiUpdateSiteSettings({ code_block_auto_fold: next });
+      setCodeAutoFold(res.code_block_auto_fold);
+      toast(
+        res.code_block_auto_fold
+          ? `已开启代码块自动折叠（超过 ${res.code_block_fold_lines} 行）`
+          : "已关闭代码块自动折叠",
+        "ok"
+      );
+    } catch (e) {
+      toast(e instanceof Error ? e.message : "保存失败");
+    } finally {
+      setTogglingFold(false);
+    }
+  };
+
+  const saveFoldLines = async () => {
+    if (savingFoldLines) return;
+    const raw = Math.round(Number(foldLines));
+    const n = Number.isFinite(raw) ? Math.max(0, Math.min(100, raw)) : 5;
+    setSavingFoldLines(true);
+    try {
+      const res = await apiUpdateSiteSettings({ code_block_fold_lines: n });
+      setFoldLines(res.code_block_fold_lines);
+      toast(
+        res.code_block_fold_lines === 0
+          ? "折叠预览已设为 0 行（无预览）"
+          : `折叠阈值已设为超过 ${res.code_block_fold_lines} 行`,
+        "ok"
+      );
+    } catch (e) {
+      toast(e instanceof Error ? e.message : "保存失败");
+    } finally {
+      setSavingFoldLines(false);
+    }
+  };
+
+  const toggleMotionField = async (
+    key: "ui_animations" | "anim_code_fold" | "anim_smooth_scroll" | "anim_chrome",
+    next: boolean
+  ) => {
+    if (togglingMotion) return;
+    setTogglingMotion(true);
+    try {
+      const res = await apiUpdateSiteSettings({ [key]: next });
+      setUiAnimations(res.ui_animations);
+      setAnimCodeFold(res.anim_code_fold);
+      setAnimSmoothScroll(res.anim_smooth_scroll);
+      setAnimChrome(res.anim_chrome);
+      const labels: Record<typeof key, [string, string]> = {
+        ui_animations: ["已开启界面动画", "已关闭界面动画（全站减少动态效果）"],
+        anim_code_fold: ["已开启代码折叠动画", "已关闭代码折叠动画"],
+        anim_smooth_scroll: ["已开启平滑滚动", "已关闭平滑滚动"],
+        anim_chrome: ["已开启装饰入场动画", "已关闭装饰入场动画"],
+      };
+      toast(next ? labels[key][0] : labels[key][1], "ok");
+    } catch (e) {
+      toast(e instanceof Error ? e.message : "保存失败");
+    } finally {
+      setTogglingMotion(false);
+    }
+  };
+
   return (
     <div className="max-w-3xl">
       <AdminPageHeader
         icon={Palette}
         title="外观设置"
-        description="配置站点主题色，全站按钮、链接、选中态会统一联动"
+        description="配置站点主题色、代码块折叠与界面动画"
       />
 
       <div className="flex flex-col gap-4 mb-6">
@@ -157,15 +246,13 @@ export default function AppearanceAdmin({ initialAccent }: { initialAccent: stri
             </label>
             <div className="flex flex-col gap-1">
               <div
-                className="flex items-center rounded-[var(--r-sm)] border bg-[var(--panel)] px-3 h-11 font-mono text-[14px] w-40"
-                style={{ borderColor: invalid ? "var(--danger)" : "var(--line-2)" }}
+                className={`admin-field-shell px-3 h-11 font-mono text-[14px] w-40${invalid ? " is-invalid" : ""}`}
               >
                 <span style={{ color: "var(--ink-3)" }}>#</span>
                 <input
                   value={draft.startsWith("#") ? draft.slice(1) : draft}
                   onChange={(e) => setDraft("#" + e.target.value.replace(/[^0-9a-fA-F#]/g, ""))}
-                  className="flex-1 min-w-0 bg-transparent outline-none ml-1 uppercase"
-                  style={{ color: "var(--ink)" }}
+                  className="admin-field-input flex-1 min-w-0 px-0 py-0 ml-1 uppercase"
                   maxLength={7}
                   spellCheck={false}
                   aria-label="主题色 HEX 值"
@@ -253,6 +340,131 @@ export default function AppearanceAdmin({ initialAccent }: { initialAccent: stri
             </div>
           </div>
         </AdminSection>
+
+        <AdminSettingRow
+          title={
+            <>
+              <Code2 size={15} /> 代码块自动折叠
+            </>
+          }
+          description="开启后，帖子与评论中超过阈值行数的 Markdown 代码块默认折叠，读者可点「展开全部」。关闭则始终完整展示。"
+          control={
+            <AdminSwitch
+              checked={codeAutoFold}
+              disabled={togglingFold}
+              onChange={() => void toggleCodeFold()}
+              label="代码块自动折叠"
+            />
+          }
+        >
+          {codeAutoFold ? (
+            <>
+              <label className="field-label" htmlFor="fold-lines">
+                折叠行数阈值
+              </label>
+              <p className="meta text-[12.5px] mb-2.5 leading-relaxed">
+                代码块行数超过该值时折叠；折叠后约露出同样行数。设为 0 表示无预览。范围 0–100，默认 5。
+              </p>
+              <div className="flex flex-wrap items-center gap-2.5">
+                <AdminStepper
+                  id="fold-lines"
+                  value={foldLines}
+                  onChange={setFoldLines}
+                  min={0}
+                  max={100}
+                  unit="行"
+                  ariaLabel="折叠行数阈值"
+                  disabled={savingFoldLines}
+                />
+                <button
+                  type="button"
+                  className="btn btn-line btn-sm"
+                  disabled={savingFoldLines}
+                  onClick={() => void saveFoldLines()}
+                >
+                  {savingFoldLines ? (
+                    <Loader2 size={14} className="animate-spin" />
+                  ) : (
+                    <Save size={14} />
+                  )}
+                  保存
+                </button>
+              </div>
+            </>
+          ) : null}
+        </AdminSettingRow>
+
+        <AdminSettingRow
+          title={
+            <>
+              <Sparkles size={15} /> 界面动画
+            </>
+          }
+          description="总开关关闭后全站即时切换（等同减少动态效果）。系统若已开启「减少动态效果」，始终优先生效。开启总开关后可细调子项。"
+          control={
+            <AdminSwitch
+              checked={uiAnimations}
+              disabled={togglingMotion}
+              onChange={() => void toggleMotionField("ui_animations", !uiAnimations)}
+              label="界面动画总开关"
+            />
+          }
+        >
+          {uiAnimations ? (
+            <div className="space-y-4">
+              <div className="flex items-start justify-between gap-4 flex-wrap">
+                <div className="min-w-0 flex-1">
+                  <p className="text-[13.5px] font-medium" style={{ color: "var(--ink)" }}>
+                    代码折叠动画
+                  </p>
+                  <p className="meta text-[12.5px] mt-0.5 leading-relaxed">
+                    代码块展开/收起的高度过渡与跟滚。
+                  </p>
+                </div>
+                <AdminSwitch
+                  checked={animCodeFold}
+                  disabled={togglingMotion}
+                  onChange={() => void toggleMotionField("anim_code_fold", !animCodeFold)}
+                  label="代码折叠动画"
+                />
+              </div>
+              <div className="flex items-start justify-between gap-4 flex-wrap">
+                <div className="min-w-0 flex-1">
+                  <p className="text-[13.5px] font-medium" style={{ color: "var(--ink)" }}>
+                    平滑滚动
+                  </p>
+                  <p className="meta text-[12.5px] mt-0.5 leading-relaxed">
+                    目录跳转、回顶、新内容提示等 scroll 行为。
+                  </p>
+                </div>
+                <AdminSwitch
+                  checked={animSmoothScroll}
+                  disabled={togglingMotion}
+                  onChange={() =>
+                    void toggleMotionField("anim_smooth_scroll", !animSmoothScroll)
+                  }
+                  label="平滑滚动"
+                />
+              </div>
+              <div className="flex items-start justify-between gap-4 flex-wrap">
+                <div className="min-w-0 flex-1">
+                  <p className="text-[13.5px] font-medium" style={{ color: "var(--ink)" }}>
+                    装饰入场
+                  </p>
+                  <p className="meta text-[12.5px] mt-0.5 leading-relaxed">
+                    列表入场、Toast、点赞弹出、在线脉冲等装饰性动画。
+                  </p>
+                </div>
+                <AdminSwitch
+                  checked={animChrome}
+                  disabled={togglingMotion}
+                  onChange={() => void toggleMotionField("anim_chrome", !animChrome)}
+                  label="装饰入场"
+                />
+              </div>
+            </div>
+          ) : null}
+        </AdminSettingRow>
       </div>
 
       <div className="flex items-center justify-between gap-3 sticky bottom-5 panel !p-3.5 pl-5 z-10">
diff --git a/frontend/app/admin/appearance/page.tsx b/frontend/app/admin/appearance/page.tsx
index 6ebd369..8115b96 100644
--- a/frontend/app/admin/appearance/page.tsx
+++ b/frontend/app/admin/appearance/page.tsx
@@ -18,6 +18,6 @@ export default async function AdminAppearancePage() {
   if (!me.user || !isSuperOrOwner(me.user.role)) {
     return <Forbidden text="外观设置仅超级管理员和站长可操作。" />;
   }
-  const { accent } = await getPublicSettingsCached();
-  return <AppearanceAdmin initialAccent={accent || ""} />;
+  const settings = await getPublicSettingsCached();
+  return <AppearanceAdmin initial={settings} />;
 }
diff --git a/frontend/app/admin/settings/SettingsAdmin.tsx b/frontend/app/admin/settings/SettingsAdmin.tsx
index 8d813de..bf24217 100644
--- a/frontend/app/admin/settings/SettingsAdmin.tsx
+++ b/frontend/app/admin/settings/SettingsAdmin.tsx
@@ -1,16 +1,9 @@
 "use client";
 
-import {
-  Code2,
-  Globe,
-  Loader2,
-  MessageSquare,
-  Save,
-  Sparkles,
-  UserPlus,
-} from "lucide-react";
+import { Globe, Loader2, MessageSquare, Save, UserPlus } from "lucide-react";
 import { useState } from "react";
 import {
+  AdminField,
   AdminPageHeader,
   AdminSection,
   AdminSettingRow,
@@ -24,33 +17,13 @@ export default function SettingsAdmin({ initial }: { initial: PublicSettings })
   const [siteDescription, setSiteDescription] = useState(initial.site_description);
   const [allowRegister, setAllowRegister] = useState(initial.allow_register);
   const [allowComments, setAllowComments] = useState(initial.allow_comments !== false);
-  const [codeAutoFold, setCodeAutoFold] = useState(
-    initial.code_block_auto_fold !== false
-  );
-  const [foldLines, setFoldLines] = useState(
-    Number.isFinite(initial.code_block_fold_lines) ? initial.code_block_fold_lines : 5
-  );
-  const [savedFoldLines, setSavedFoldLines] = useState(
-    Number.isFinite(initial.code_block_fold_lines) ? initial.code_block_fold_lines : 5
-  );
   const [savedName, setSavedName] = useState(initial.site_name);
   const [savedDesc, setSavedDesc] = useState(initial.site_description);
   const [saving, setSaving] = useState(false);
   const [togglingReg, setTogglingReg] = useState(false);
   const [togglingComments, setTogglingComments] = useState(false);
-  const [togglingFold, setTogglingFold] = useState(false);
-  const [savingFoldLines, setSavingFoldLines] = useState(false);
-  const [uiAnimations, setUiAnimations] = useState(initial.ui_animations !== false);
-  const [animCodeFold, setAnimCodeFold] = useState(initial.anim_code_fold !== false);
-  const [animSmoothScroll, setAnimSmoothScroll] = useState(
-    initial.anim_smooth_scroll !== false
-  );
-  const [animChrome, setAnimChrome] = useState(initial.anim_chrome !== false);
-  const [togglingMotion, setTogglingMotion] = useState(false);
 
-  const dirty =
-    siteName.trim() !== savedName || siteDescription.trim() !== savedDesc;
-  const foldLinesDirty = foldLines !== savedFoldLines;
+  const dirty = siteName.trim() !== savedName || siteDescription.trim() !== savedDesc;
 
   const saveIdentity = async () => {
     if (saving) return;
@@ -107,108 +80,35 @@ export default function SettingsAdmin({ initial }: { initial: PublicSettings })
     }
   };
 
-  const toggleCodeFold = async () => {
-    if (togglingFold) return;
-    const next = !codeAutoFold;
-    setTogglingFold(true);
-    try {
-      const res = await apiUpdateSiteSettings({ code_block_auto_fold: next });
-      setCodeAutoFold(res.code_block_auto_fold);
-      toast(
-        res.code_block_auto_fold
-          ? `已开启代码块自动折叠（超过 ${res.code_block_fold_lines} 行）`
-          : "已关闭代码块自动折叠",
-        "ok"
-      );
-    } catch (e) {
-      toast(e instanceof Error ? e.message : "保存失败");
-    } finally {
-      setTogglingFold(false);
-    }
-  };
-
-  const saveFoldLines = async () => {
-    if (savingFoldLines) return;
-    const raw = Math.round(Number(foldLines));
-    const n = Number.isFinite(raw) ? Math.max(0, Math.min(100, raw)) : 5;
-    setSavingFoldLines(true);
-    try {
-      const res = await apiUpdateSiteSettings({ code_block_fold_lines: n });
-      setFoldLines(res.code_block_fold_lines);
-      setSavedFoldLines(res.code_block_fold_lines);
-      toast(
-        res.code_block_fold_lines === 0
-          ? "折叠预览已设为 0 行（无预览）"
-          : `折叠阈值已设为超过 ${res.code_block_fold_lines} 行`,
-        "ok"
-      );
-    } catch (e) {
-      toast(e instanceof Error ? e.message : "保存失败");
-    } finally {
-      setSavingFoldLines(false);
-    }
-  };
-
-  const toggleMotionField = async (
-    key: "ui_animations" | "anim_code_fold" | "anim_smooth_scroll" | "anim_chrome",
-    next: boolean
-  ) => {
-    if (togglingMotion) return;
-    setTogglingMotion(true);
-    try {
-      const res = await apiUpdateSiteSettings({ [key]: next });
-      setUiAnimations(res.ui_animations);
-      setAnimCodeFold(res.anim_code_fold);
-      setAnimSmoothScroll(res.anim_smooth_scroll);
-      setAnimChrome(res.anim_chrome);
-      const labels: Record<typeof key, [string, string]> = {
-        ui_animations: ["已开启界面动画", "已关闭界面动画（全站减少动态效果）"],
-        anim_code_fold: ["已开启代码折叠动画", "已关闭代码折叠动画"],
-        anim_smooth_scroll: ["已开启平滑滚动", "已关闭平滑滚动"],
-        anim_chrome: ["已开启装饰入场动画", "已关闭装饰入场动画"],
-      };
-      toast(next ? labels[key][0] : labels[key][1], "ok");
-    } catch (e) {
-      toast(e instanceof Error ? e.message : "保存失败");
-    } finally {
-      setTogglingMotion(false);
-    }
-  };
-
   return (
     <div className="max-w-3xl">
       <AdminPageHeader
         icon={Globe}
         title="站点设置"
-        description="配置站点名称、简介与注册/评论开关；主题色请到「外观」页调整"
+        description="配置站点名称、简介与注册/评论开关；主题色、代码折叠与动画请到「外观」页调整"
       />
 
       <div className="flex flex-col gap-4">
-        <AdminSection
-          title="基本信息"
-          description="用于页眉品牌、页脚版权与 SEO 元信息"
-        >
-          <label className="field-label" htmlFor="site-name">
-            站点名称
-          </label>
-          <input
+        <AdminSection title="基本信息" description="用于页眉品牌、页脚版权与 SEO 元信息">
+          <AdminField
             id="site-name"
-            className="field mb-4"
+            className="mb-4"
+            label="站点名称"
             maxLength={32}
             value={siteName}
-            onChange={(e) => setSiteName(e.target.value)}
+            onChange={setSiteName}
             placeholder="姜十三论坛"
           />
 
-          <label className="field-label" htmlFor="site-desc">
-            站点简介
-          </label>
-          <textarea
+          <AdminField
             id="site-desc"
-            className="field min-h-[96px] mb-4"
+            className="mb-4"
+            label="站点简介"
+            as="textarea"
+            minHeight="96px"
             maxLength={160}
             value={siteDescription}
-            onChange={(e) => setSiteDescription(e.target.value)}
+            onChange={setSiteDescription}
             placeholder="一句话介绍社区定位…"
           />
 
@@ -248,7 +148,7 @@ export default function SettingsAdmin({ initial }: { initial: PublicSettings })
               <MessageSquare size={15} /> 开放评论
             </>
           }
-          description="关闭后全站禁止发表新评论与回复，已有评论仍可浏览。适用于 ICP/IPC 备案审核等合规需要；前台仅提示「暂停评论」，不会展示备案事由。"
+          description="关闭后前台不展示评论入口、评论数量与已有评论，并提示本站不支持评论。适用于备案审核等合规需要。"
           control={
             <AdminSwitch
               checked={allowComments}
@@ -258,132 +158,6 @@ export default function SettingsAdmin({ initial }: { initial: PublicSettings })
             />
           }
         />
-
-        <AdminSettingRow
-          title={
-            <>
-              <Code2 size={15} /> 代码块自动折叠
-            </>
-          }
-          description="开启后，帖子与评论中超过阈值行数的 Markdown 代码块默认折叠，读者可点「展开全部」。关闭则始终完整展示。"
-          control={
-            <AdminSwitch
-              checked={codeAutoFold}
-              disabled={togglingFold}
-              onChange={() => void toggleCodeFold()}
-              label="代码块自动折叠"
-            />
-          }
-        >
-          {codeAutoFold ? (
-            <>
-              <label className="field-label" htmlFor="fold-lines">
-                折叠行数阈值
-              </label>
-              <p className="meta text-[12.5px] mb-2.5 leading-relaxed">
-                代码块行数超过该值时折叠；折叠后约露出同样行数。设为 0 表示无预览。范围 0–100，默认 5。
-              </p>
-              <div className="flex flex-wrap items-center gap-2.5">
-                <input
-                  id="fold-lines"
-                  type="number"
-                  min={0}
-                  max={100}
-                  className="field w-24"
-                  value={foldLines}
-                  onChange={(e) => setFoldLines(Number(e.target.value))}
-                  aria-label="折叠行数阈值"
-                />
-                <span className="meta text-[12.5px]">行</span>
-                <button
-                  type="button"
-                  className="btn btn-line btn-sm"
-                  disabled={!foldLinesDirty || savingFoldLines}
-                  onClick={() => void saveFoldLines()}
-                >
-                  {savingFoldLines ? (
-                    <Loader2 size={14} className="animate-spin" />
-                  ) : (
-                    <Save size={14} />
-                  )}
-                  保存
-                </button>
-              </div>
-            </>
-          ) : null}
-        </AdminSettingRow>
-
-        <AdminSettingRow
-          title={
-            <>
-              <Sparkles size={15} /> 界面动画
-            </>
-          }
-          description="总开关关闭后全站即时切换（等同减少动态效果）。系统若已开启「减少动态效果」，始终优先生效。开启总开关后可细调子项。"
-          control={
-            <AdminSwitch
-              checked={uiAnimations}
-              disabled={togglingMotion}
-              onChange={() => void toggleMotionField("ui_animations", !uiAnimations)}
-              label="界面动画总开关"
-            />
-          }
-        >
-          {uiAnimations ? (
-            <div className="space-y-4">
-              <div className="flex items-start justify-between gap-4 flex-wrap">
-                <div className="min-w-0 flex-1">
-                  <p className="text-[13.5px] font-medium" style={{ color: "var(--ink)" }}>
-                    代码折叠动画
-                  </p>
-                  <p className="meta text-[12.5px] mt-0.5 leading-relaxed">
-                    代码块展开/收起的高度过渡与跟滚。
-                  </p>
-                </div>
-                <AdminSwitch
-                  checked={animCodeFold}
-                  disabled={togglingMotion}
-                  onChange={() => void toggleMotionField("anim_code_fold", !animCodeFold)}
-                  label="代码折叠动画"
-                />
-              </div>
-              <div className="flex items-start justify-between gap-4 flex-wrap">
-                <div className="min-w-0 flex-1">
-                  <p className="text-[13.5px] font-medium" style={{ color: "var(--ink)" }}>
-                    平滑滚动
-                  </p>
-                  <p className="meta text-[12.5px] mt-0.5 leading-relaxed">
-                    目录跳转、回顶、新内容提示等 scroll 行为。
-                  </p>
-                </div>
-                <AdminSwitch
-                  checked={animSmoothScroll}
-                  disabled={togglingMotion}
-                  onChange={() =>
-                    void toggleMotionField("anim_smooth_scroll", !animSmoothScroll)
-                  }
-                  label="平滑滚动"
-                />
-              </div>
-              <div className="flex items-start justify-between gap-4 flex-wrap">
-                <div className="min-w-0 flex-1">
-                  <p className="text-[13.5px] font-medium" style={{ color: "var(--ink)" }}>
-                    装饰入场
-                  </p>
-                  <p className="meta text-[12.5px] mt-0.5 leading-relaxed">
-                    列表入场、Toast、点赞弹出、在线脉冲等装饰性动画。
-                  </p>
-                </div>
-                <AdminSwitch
-                  checked={animChrome}
-                  disabled={togglingMotion}
-                  onChange={() => void toggleMotionField("anim_chrome", !animChrome)}
-                  label="装饰入场"
-                />
-              </div>
-            </div>
-          ) : null}
-        </AdminSettingRow>
       </div>
     </div>
   );
diff --git a/frontend/app/globals.css b/frontend/app/globals.css
index 01e0d2b..449e957 100644
--- a/frontend/app/globals.css
+++ b/frontend/app/globals.css
@@ -1512,6 +1512,47 @@ h1, h2, h3, h4 {
 .j13-chat-composer-input.has-value::placeholder {
   color: transparent;
 }
+
+/* 后台输入：与聊天搜索同一套壳层聚焦（未分层，才能压过全局 :focus-visible 双线） */
+.admin-field-shell,
+.admin-stepper {
+  background: var(--bg);
+  border: 1px solid var(--line);
+  border-radius: 12px;
+  transition: border-color 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
+}
+.admin-field-shell:hover:not(:focus-within),
+.admin-stepper:hover:not(:focus-within) {
+  border-color: color-mix(in srgb, var(--line-2) 40%, var(--line));
+}
+.admin-field-shell:focus-within,
+.admin-stepper:focus-within {
+  border-color: var(--accent) !important;
+  box-shadow: 0 0 0 3px var(--accent-soft);
+  background: var(--panel);
+}
+.admin-field-input,
+.admin-field-input:focus,
+.admin-field-input:focus-visible,
+.admin-stepper-input,
+.admin-stepper-input:focus,
+.admin-stepper-input:focus-visible {
+  outline: none !important;
+  box-shadow: none !important;
+  border: 0 !important;
+  background: transparent !important;
+}
+.admin-stepper-btn:focus,
+.admin-stepper-btn:focus-visible {
+  outline: none !important;
+  box-shadow: none !important;
+}
+.admin-field-shell.is-invalid {
+  border-color: var(--danger) !important;
+}
+.admin-field-shell.is-invalid:focus-within {
+  box-shadow: 0 0 0 3px var(--danger-soft);
+}
 .j13-chat-composer-mirror {
   position: absolute;
   inset: 0;
@@ -1968,6 +2009,116 @@ a.j13-mention-token:hover {
     }
   }
 
+  .admin-field-head {
+    display: flex;
+    align-items: baseline;
+    justify-content: space-between;
+    gap: 0.75rem;
+    margin-bottom: 0.5rem;
+  }
+  .admin-field-head .field-label {
+    margin-bottom: 0;
+  }
+  .admin-field-count {
+    font-size: 12px;
+    font-variant-numeric: tabular-nums;
+    color: var(--ink-3);
+    flex-shrink: 0;
+  }
+  .admin-field-shell {
+    display: flex;
+    align-items: center;
+    width: 100%;
+  }
+  .admin-field-shell.is-area {
+    display: block;
+  }
+  .admin-field-input {
+    width: 100%;
+    min-width: 0;
+    padding: 10px 12px;
+    color: var(--ink);
+    font-size: 14px;
+    line-height: 1.5;
+    font-family: var(--font-sans);
+  }
+  .admin-field-input::placeholder {
+    color: var(--ink-3);
+  }
+  .admin-field-input:disabled {
+    opacity: 0.6;
+    cursor: not-allowed;
+  }
+  textarea.admin-field-input {
+    display: block;
+    font-family: var(--font-sans);
+    font-size: 14px;
+    line-height: 1.7;
+    resize: vertical;
+  }
+  .admin-search-shell {
+    display: flex;
+    align-items: center;
+    gap: 0.5rem;
+    height: 2.5rem;
+    padding: 0 0.75rem;
+  }
+  .admin-search-shell .admin-field-input {
+    padding: 0;
+    height: 100%;
+    font-size: 13px;
+  }
+
+  .admin-stepper {
+    display: inline-flex;
+    align-items: stretch;
+    flex-shrink: 0;
+    height: 2.5rem;
+    overflow: hidden;
+  }
+  .admin-stepper.is-disabled {
+    opacity: 0.6;
+  }
+  .admin-stepper-btn {
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    width: 2.25rem;
+    border: none;
+    padding: 0;
+    background: transparent;
+    color: var(--ink-2);
+    cursor: pointer;
+  }
+  .admin-stepper-btn:hover:not(:disabled) {
+    background: var(--tint);
+    color: var(--ink);
+  }
+  .admin-stepper-btn:disabled {
+    opacity: 0.35;
+    cursor: not-allowed;
+  }
+  .admin-stepper-input {
+    width: 3.25rem;
+    min-width: 0;
+    padding: 0;
+    margin: 0;
+    text-align: center;
+    color: var(--ink);
+    font-size: 14px;
+    font-weight: 600;
+    font-variant-numeric: tabular-nums;
+    font-family: var(--font-sans);
+  }
+  .admin-stepper-unit {
+    display: inline-flex;
+    align-items: center;
+    padding-right: 0.25rem;
+    font-size: 12.5px;
+    color: var(--ink-3);
+    user-select: none;
+  }
+
   /* ----- 点赞按钮：未赞描边态，hover 同色系填充；已赞为浅底实心态 ----- */
   .j13-like {
     border-color: var(--line-2);
@@ -2593,7 +2744,7 @@ a.j13-mention-token:hover {
   .j13-pulse-cell:nth-child(odd) {
     border-right: 1px solid var(--line);
   }
-  .j13-pulse-cell:nth-child(-n + 2) {
+  .j13-pulse-cell:nth-child(-n + 2):nth-last-child(n + 3) {
     border-bottom: 1px solid var(--line);
   }
   .j13-pulse-lab {
diff --git a/frontend/app/layout.tsx b/frontend/app/layout.tsx
index 9cfc635..e66270c 100644
--- a/frontend/app/layout.tsx
+++ b/frontend/app/layout.tsx
@@ -11,6 +11,7 @@ import ThemeSync from "@/components/ThemeSync";
 import RealtimeProvider from "@/components/RealtimeProvider";
 import CodeFoldProvider from "@/components/markdown/CodeFoldProvider";
 import MotionProvider from "@/components/MotionProvider";
+import CommentsPolicyProvider from "@/components/CommentsPolicyProvider";
 import type { User } from "@/lib/api";
 import { getMeCached, getPublicSettingsCached } from "@/lib/serverData";
 import { TOKEN_COOKIE, authCookieHeader } from "@/lib/cookies";
@@ -126,12 +127,14 @@ export default async function RootLayout({
           className="flex-1 w-full max-w-[1440px] mx-auto px-4 sm:px-6 py-7 sm:py-9 outline-none"
         >
           <MotionProvider initial={motionCfg}>
-            <CodeFoldProvider
-              initialEnabled={settings.code_block_auto_fold}
-              initialFoldLines={settings.code_block_fold_lines}
-            >
-              {children}
-            </CodeFoldProvider>
+            <CommentsPolicyProvider allowComments={settings.allow_comments !== false}>
+              <CodeFoldProvider
+                initialEnabled={settings.code_block_auto_fold}
+                initialFoldLines={settings.code_block_fold_lines}
+              >
+                {children}
+              </CodeFoldProvider>
+            </CommentsPolicyProvider>
           </MotionProvider>
         </main>
         <Footer siteName={settings.site_name} />
diff --git a/frontend/app/login/page.tsx b/frontend/app/login/page.tsx
index 1388cf6..365ca6c 100644
--- a/frontend/app/login/page.tsx
+++ b/frontend/app/login/page.tsx
@@ -6,6 +6,7 @@ import Link from "next/link";
 import { MessagesSquare } from "lucide-react";
 import { apiLogin, apiMe, apiGetSettings } from "@/lib/api";
 import { hasAuthCookieHint } from "@/lib/cookies";
+import { useAllowComments } from "@/components/CommentsPolicyProvider";
 
 // 仅允许同源相对路径跳转，拦截 //host、/\\host 与绝对 URL 形式的开放重定向
 function safeRedirect(to: string | null): string {
@@ -40,6 +41,7 @@ function RegisterHint() {
 export default function LoginPage() {
   const router = useRouter();
   const searchParams = useSearchParams();
+  const allowComments = useAllowComments();
   const redirect = safeRedirect(searchParams.get("redirect"));
   const [username, setUsername] = useState("");
   const [password, setPassword] = useState("");
@@ -91,7 +93,7 @@ export default function LoginPage() {
           欢迎回来
         </h1>
         <p className="text-sm mt-2" style={{ color: "var(--ink-2)" }}>
-          登录后发帖、评论与点赞
+          登录后发帖{allowComments ? "、评论" : ""}与点赞
         </p>
       </div>
 
diff --git a/frontend/app/page.tsx b/frontend/app/page.tsx
index 9c792cb..3b772bf 100644
--- a/frontend/app/page.tsx
+++ b/frontend/app/page.tsx
@@ -10,7 +10,7 @@ import {
   type BoardSidebarResponse,
 } from "@/lib/api";
 import { authCookieHeader } from "@/lib/cookies";
-import { getMeCached } from "@/lib/serverData";
+import { getMeCached, getPublicSettingsCached } from "@/lib/serverData";
 import Pagination from "@/components/Pagination";
 import PostRow from "@/components/PostRow";
 import FeedTabs, { type FeedSort } from "@/components/home/FeedTabs";
@@ -32,8 +32,11 @@ interface HomePageProps {
   searchParams: Promise<{ q?: string; page?: string; sort?: string; board?: string }>;
 }
 
-function normalizeSort(v?: string): FeedSort {
-  if (v === "new" || v === "recommended") return v;
+function normalizeSort(v: string | undefined, allowComments: boolean): FeedSort {
+  if (v === "recommended") return "recommended";
+  if (v === "new") return "new";
+  if (!allowComments) return "new";
+  if (v === "latest") return "latest";
   return "latest";
 }
 
@@ -75,11 +78,12 @@ export default async function HomePage({ searchParams }: HomePageProps) {
   const sp = await searchParams;
   const keyword = sp.q?.trim() || "";
   const page = Math.max(1, parseInt(sp.page || "1", 10) || 1);
-  const sort = normalizeSort(sp.sort);
   const boardId = Math.max(0, parseInt(sp.board || "0", 10) || 0);
   const isSearch = keyword.length > 0;
 
   const cookie = authCookieHeader(await cookies());
+  const allowComments = (await getPublicSettingsCached()).allow_comments !== false;
+  const sort = normalizeSort(sp.sort, allowComments);
   // 与 layout 共享同一份 /me 请求（React cache 去重）
   const mePromise = getMeCached(cookie || undefined);
   const postsPromise = fetchPosts(
@@ -216,6 +220,7 @@ export default async function HomePage({ searchParams }: HomePageProps) {
               hot={boardSidebar.hot}
               activeUsers={boardSidebar.active_users}
               checkin={boardSidebar.checkin ?? undefined}
+              allowComments={allowComments}
             />
           ) : boardPanelsMissing ? (
             <BoardMissingPanel />
@@ -229,6 +234,7 @@ export default async function HomePage({ searchParams }: HomePageProps) {
               announcements={overview.announcements}
               newUsers={overview.new_users}
               checkin={overview.checkin ?? undefined}
+              allowComments={allowComments}
             />
           )
         )}
@@ -245,6 +251,7 @@ export default async function HomePage({ searchParams }: HomePageProps) {
               hot={boardSidebar.hot}
               activeUsers={boardSidebar.active_users}
               checkin={boardSidebar.checkin ?? undefined}
+              allowComments={allowComments}
             />
           </div>
         ) : null
@@ -258,6 +265,7 @@ export default async function HomePage({ searchParams }: HomePageProps) {
               announcements={overview.announcements}
               newUsers={overview.new_users}
               checkin={overview.checkin ?? undefined}
+              allowComments={allowComments}
             />
           </div>
         )
diff --git a/frontend/app/post/[id]/page.tsx b/frontend/app/post/[id]/page.tsx
index 7c0dab4..7a81b0e 100644
--- a/frontend/app/post/[id]/page.tsx
+++ b/frontend/app/post/[id]/page.tsx
@@ -22,6 +22,7 @@ import {
   type UserProfile,
   type PostListItem,
   type Board,
+  type CommentsResponse,
 } from "@/lib/api";
 import { authCookieHeader } from "@/lib/cookies";
 import { getMeCached, getPublicSettingsCached } from "@/lib/serverData";
@@ -152,13 +153,19 @@ function BoardCard({ board }: { board: Board }) {
   );
 }
 
-function AuthorRailCard({ profile }: { profile: UserProfile }) {
+function AuthorRailCard({
+  profile,
+  allowComments,
+}: {
+  profile: UserProfile;
+  allowComments: boolean;
+}) {
   const u = profile.user;
   const signature = (u.signature || "").trim();
   const { post_count, comment_count, points, streak } = profile.stats;
   const stats = [
     { label: "发帖", value: post_count },
-    { label: "评论", value: comment_count },
+    ...(allowComments ? [{ label: "评论", value: comment_count }] : []),
     { label: "积分", value: points },
   ];
   return (
@@ -197,7 +204,7 @@ function AuthorRailCard({ profile }: { profile: UserProfile }) {
         </p>
       ) : null}
       <div
-        className="mt-3 grid grid-cols-3 border-t"
+        className={`mt-3 grid border-t ${stats.length === 3 ? "grid-cols-3" : "grid-cols-2"}`}
         style={{ borderColor: "var(--line)" }}
       >
         {stats.map((s, i) => (
@@ -271,11 +278,13 @@ function RelatedPosts({
   posts,
   boardId,
   uid = "related",
+  allowComments,
 }: {
   posts: PostListItem[];
   boardId: number;
   // 右栏与移动端内联实例同时存在，id 必须区分以免 aria-labelledby 指向隐藏副本
   uid?: string;
+  allowComments: boolean;
 }) {
   if (posts.length === 0) return null;
   const titleId = `${uid}-title`;
@@ -294,9 +303,11 @@ function RelatedPosts({
                   {p.title}
                 </span>
                 <span className="mt-1 flex items-center gap-2.5 meta text-[11.5px]">
-                  <span className="inline-flex items-center gap-1">
-                    <MessageCircle size={11.5} /> {p.comment_count}
-                  </span>
+                  {allowComments ? (
+                    <span className="inline-flex items-center gap-1">
+                      <MessageCircle size={11.5} /> {p.comment_count}
+                    </span>
+                  ) : null}
                   <span className="inline-flex items-center gap-1">
                     <Heart size={11.5} /> {p.like_count}
                   </span>
@@ -318,7 +329,13 @@ function RelatedPosts({
 }
 
 /* 移动端 / 窄屏作者卡（xl 以下内联在正文与评论之间，替代左栏作者模块） */
-function AuthorCardStacked({ profile }: { profile: UserProfile }) {
+function AuthorCardStacked({
+  profile,
+  allowComments,
+}: {
+  profile: UserProfile;
+  allowComments: boolean;
+}) {
   const u = profile.user;
   const signature = (u.signature || "").trim();
   const { post_count, comment_count, points, streak } = profile.stats;
@@ -349,8 +366,12 @@ function AuthorCardStacked({ profile }: { profile: UserProfile }) {
             <span>@{u.username}</span>
             <span aria-hidden>·</span>
             <span>发帖 {post_count}</span>
-            <span aria-hidden>·</span>
-            <span>评论 {comment_count}</span>
+            {allowComments ? (
+              <>
+                <span aria-hidden>·</span>
+                <span>评论 {comment_count}</span>
+              </>
+            ) : null}
             <span aria-hidden>·</span>
             <span>积分 {points}</span>
             {streak > 0 && (
@@ -441,11 +462,18 @@ export default async function PostDetailPage({ params, searchParams }: PageProps
     );
   }
 
-  // 评论 / 当前用户 / 站点设置 / 作者资料 / 同板块热议并行拉取；侧栏数据失败一律静默降级，不阻塞正文
-  const [commentsData, me, siteSettings, profile, relatedData] = await Promise.all([
-    fetchComments(id, commentPage, cookie),
+  // 站点设置已在 layout 缓存；关评时不拉评论树，避免首屏 HTML 泄露历史评论
+  const allowComments = (await getPublicSettingsCached()).allow_comments !== false;
+  const emptyComments: CommentsResponse = {
+    comments: [],
+    total: 0,
+    total_comments: 0,
+    page: 1,
+    size: 20,
+  };
+  const [commentsData, me, profile, relatedData] = await Promise.all([
+    allowComments ? fetchComments(id, commentPage, cookie) : Promise.resolve(emptyComments),
     getMeCached(cookie || undefined),
-    getPublicSettingsCached(),
     fetchUserProfile(String(post.user.id), 1, cookie).catch(() => null),
     fetchPosts(1, 8, post.board_id, "recommended", "", false, cookie).catch(() => null),
   ]);
@@ -504,13 +532,14 @@ export default async function PostDetailPage({ params, searchParams }: PageProps
     datePublished: post.created_at,
     dateModified: post.updated_at,
     author: { "@type": "Person", name: post.user.nickname },
-    commentCount: post.comment_count,
+    ...(allowComments ? { commentCount: post.comment_count } : {}),
     interactionStatistic: {
       "@type": "InteractionCounter",
       interactionType: { "@type": "ReadAction" },
       userInteractionCount: post.view_count,
     },
-    ...(acceptedAnswer &&
+    ...(allowComments &&
+      acceptedAnswer &&
       !acceptedAnswer.deleted &&
       !post.content_locked && {
         acceptedAnswer: {
@@ -546,7 +575,12 @@ export default async function PostDetailPage({ params, searchParams }: PageProps
     <>
       <script type="application/ld+json" dangerouslySetInnerHTML={{ __html: JSON.stringify(jsonLd) }} />
       {/* 移动端浮动操作条：长文阅读中途可点赞 / 跳评论 / 回顶部 */}
-      <MobilePostBar postId={id} liked={post.liked} likeCount={post.like_count} />
+      <MobilePostBar
+        postId={id}
+        liked={post.liked}
+        likeCount={post.like_count}
+        allowComments={allowComments}
+      />
 
       {/* 三栏阅读布局：宽度与首页工作台一致——lg = 左224 + 正文 + 右280，xl = 左240 + 正文 + 右300；以下单栏 */}
       <div className="grid grid-cols-1 items-start lg:grid-cols-[224px_minmax(0,1fr)_280px] xl:grid-cols-[240px_minmax(0,1fr)_300px] gap-x-6 xl:gap-x-7">
@@ -558,7 +592,7 @@ export default async function PostDetailPage({ params, searchParams }: PageProps
           aria-label="帖子导航"
         >
           <BoardCard board={post.board} />
-          {profile && <AuthorRailCard profile={profile} />}
+          {profile && <AuthorRailCard profile={profile} allowComments={allowComments} />}
           {profile && <AuthorPosts posts={authorPosts} />}
         </aside>
 
@@ -656,9 +690,11 @@ export default async function PostDetailPage({ params, searchParams }: PageProps
                     <span className="inline-flex items-center gap-1.5" aria-label={`浏览 ${post.view_count} 次`}>
                       <IconEye size={14} /> {post.view_count} 浏览
                     </span>
-                    <span className="inline-flex items-center gap-1.5" aria-label={`评论 ${post.comment_count} 条`}>
-                      <IconComment size={14} /> {post.comment_count} 评论
-                    </span>
+                    {allowComments ? (
+                      <span className="inline-flex items-center gap-1.5" aria-label={`评论 ${post.comment_count} 条`}>
+                        <IconComment size={14} /> {post.comment_count} 评论
+                      </span>
+                    ) : null}
                     <span className="inline-flex items-center gap-1.5" aria-label={`阅读约需 ${readingMinutes} 分钟`}>
                       <Clock size={14} /> 约 {readingMinutes} 分钟读完
                     </span>
@@ -707,7 +743,7 @@ export default async function PostDetailPage({ params, searchParams }: PageProps
                 lottery={post.lottery}
                 loggedIn={!!me.user}
               />
-              {!post.content_locked && acceptedAnswer ? (
+              {!post.content_locked && allowComments && acceptedAnswer ? (
                 <AcceptedAnswerCard
                   answer={acceptedAnswer}
                   variant={acceptedAnswerVariant}
@@ -738,11 +774,11 @@ export default async function PostDetailPage({ params, searchParams }: PageProps
             {/* 窄屏作者卡（lg 起由左栏承载，避免重复展示） */}
             {profile && (
               <div className="lg:hidden mt-6">
-                <AuthorCardStacked profile={profile} />
+                <AuthorCardStacked profile={profile} allowComments={allowComments} />
               </div>
             )}
 
-            {/* 非公开帖不开放评论（后端同样拒绝），给出状态提示 */}
+            {/* 关评：前台仅提示不支持评论，不展示历史楼层；非公开帖不提及评论 */}
             {isPublished ? (
               <CommentSection
                 postId={id}
@@ -754,7 +790,6 @@ export default async function PostDetailPage({ params, searchParams }: PageProps
                 page={commentsData.page}
                 size={commentsData.size}
                 user={me.user}
-                allowComments={siteSettings.allow_comments}
                 acceptMode={acceptMode}
                 acceptedCommentId={
                   post.question?.accepted_comment_id ||
@@ -765,11 +800,11 @@ export default async function PostDetailPage({ params, searchParams }: PageProps
                   post.lottery?.drawn
                     ? (post.lottery.winners || [])
                         .map((w) => w.comment_id || 0)
-                        .filter((id) => id > 0)
+                        .filter((cid) => cid > 0)
                     : []
                 }
               />
-            ) : (
+            ) : allowComments ? (
               <section className="panel p-6 sm:p-8 mt-6 text-center" aria-label="评论区">
                 <p className="text-[14px]" style={{ color: "var(--ink-2)" }}>
                   {post.status === "pending" ? "帖子审核通过后开放评论" : "帖子未通过审核，评论已关闭"}
@@ -782,11 +817,16 @@ export default async function PostDetailPage({ params, searchParams }: PageProps
                     : "审核通过后评论区将自动开放"}
                 </p>
               </section>
-            )}
+            ) : null}
 
             {/* 窄屏相关讨论（lg 起由右栏承载） */}
             <div className="lg:hidden mt-6">
-              <RelatedPosts posts={related} boardId={post.board_id} uid="related-inline" />
+              <RelatedPosts
+                posts={related}
+                boardId={post.board_id}
+                uid="related-inline"
+                allowComments={allowComments}
+              />
             </div>
           </article>
         </div>
@@ -797,7 +837,7 @@ export default async function PostDetailPage({ params, searchParams }: PageProps
           aria-label="阅读辅助"
         >
           {toc.length > 0 && <PostToc items={toc} />}
-          <RelatedPosts posts={related} boardId={post.board_id} />
+          <RelatedPosts posts={related} boardId={post.board_id} allowComments={allowComments} />
         </aside>
       </div>
 
diff --git a/frontend/app/u/[id]/UserProfileContent.tsx b/frontend/app/u/[id]/UserProfileContent.tsx
index 4af51f2..d158f25 100644
--- a/frontend/app/u/[id]/UserProfileContent.tsx
+++ b/frontend/app/u/[id]/UserProfileContent.tsx
@@ -16,6 +16,7 @@ export default function UserProfileContent({
   commentData,
   commentError,
   page,
+  allowComments = true,
 }: {
   userId: string;
   profile: UserProfile;
@@ -23,6 +24,7 @@ export default function UserProfileContent({
   commentData: UserCommentsResponse | null;
   commentError: boolean;
   page: number;
+  allowComments?: boolean;
 }) {
   return (
     <div>
@@ -50,9 +52,11 @@ export default function UserProfileContent({
                   </h2>
                   <div className="flex items-center gap-4 meta text-[12px]">
                     <span className="tabular-nums">{new Date(post.created_at).toLocaleDateString("zh-CN")}</span>
-                    <span className="inline-flex items-center gap-1">
-                      <IconComment size={12} /> {post.comment_count}
-                    </span>
+                    {allowComments ? (
+                      <span className="inline-flex items-center gap-1">
+                        <IconComment size={12} /> {post.comment_count}
+                      </span>
+                    ) : null}
                     <span className="inline-flex items-center gap-1">
                       <IconEye size={12} /> {post.view_count}
                     </span>
diff --git a/frontend/app/u/[id]/page.tsx b/frontend/app/u/[id]/page.tsx
index 7745e76..10ba0a7 100644
--- a/frontend/app/u/[id]/page.tsx
+++ b/frontend/app/u/[id]/page.tsx
@@ -7,7 +7,7 @@ import {
 } from "lucide-react";
 import { fetchUserProfile, fetchUserComments, type UserProfile, type UserCommentsResponse } from "@/lib/api";
 import { authCookieHeader } from "@/lib/cookies";
-import { getMeCached } from "@/lib/serverData";
+import { getMeCached, getPublicSettingsCached } from "@/lib/serverData";
 import UserProfileContent from "./UserProfileContent";
 import ProfileForm from "./ProfileForm";
 import PasswordForm from "./PasswordForm";
@@ -28,9 +28,12 @@ export async function generateMetadata({ params }: UserPageProps): Promise<Metad
   const { id } = await params;
   try {
     const data = await fetchUserProfile(id, 1);
+    const allowComments = (await getPublicSettingsCached()).allow_comments !== false;
     return {
       title: data.user.nickname || data.user.username,
-      description: `查看 ${data.user.nickname} 的资料、发帖与评论`,
+      description: allowComments
+        ? `查看 ${data.user.nickname} 的资料、发帖与评论`
+        : `查看 ${data.user.nickname} 的资料与发帖`,
     };
   } catch {
     return { title: "用户不存在" };
@@ -53,6 +56,7 @@ export default async function UserPage({ params, searchParams }: UserPageProps)
 
   const cookie = authCookieHeader(await cookies());
   const me = await getMeCached(cookie || undefined);
+  const allowComments = (await getPublicSettingsCached()).allow_comments !== false;
 
   let data: UserProfile;
   try {
@@ -75,13 +79,14 @@ export default async function UserPage({ params, searchParams }: UserPageProps)
   // 判断是否本人（决定能否看到 settings / security tab）
   const isOwner = me.user?.id === data.user.id;
   const currentUser = me.user;
-  const effectiveTab: UserTab =
+  let effectiveTab: UserTab =
     (tab === "settings" || tab === "security") && !isOwner ? "posts" : tab;
+  if (!allowComments && effectiveTab === "comments") effectiveTab = "posts";
 
   // 评论 tab：SSR 直出对应分页
   let commentData: UserCommentsResponse | null = null;
   let commentError = false;
-  if (effectiveTab === "comments") {
+  if (allowComments && effectiveTab === "comments") {
     try {
       commentData = await fetchUserComments(id, page);
     } catch {
@@ -96,7 +101,9 @@ export default async function UserPage({ params, searchParams }: UserPageProps)
   // 导航项（桌面左栏 / 移动 chips 共用定义）
   const navItems: { key: UserTab; label: string; count?: number; icon: React.ReactNode; ownerOnly?: boolean }[] = [
     { key: "posts", label: "发帖", count: data.stats.post_count, icon: <FileText size={15} /> },
-    { key: "comments", label: "评论", count: data.stats.comment_count, icon: <MessageCircle size={15} /> },
+    ...(allowComments
+      ? [{ key: "comments" as const, label: "评论", count: data.stats.comment_count, icon: <MessageCircle size={15} /> }]
+      : []),
     { key: "settings", label: "资料设置", icon: <Settings size={15} />, ownerOnly: true },
     { key: "security", label: "安全设置", icon: <KeyRound size={15} />, ownerOnly: true },
   ];
@@ -106,7 +113,7 @@ export default async function UserPage({ params, searchParams }: UserPageProps)
   // 统计条数据
   const heroStats = [
     { label: "发帖", value: data.stats.post_count },
-    { label: "评论", value: data.stats.comment_count },
+    ...(allowComments ? [{ label: "评论", value: data.stats.comment_count }] : []),
     { label: "积分", value: data.stats.points, foot: data.stats.streak > 0 ? `连签 ${data.stats.streak} 天` : undefined },
   ];
 
@@ -227,7 +234,10 @@ export default async function UserPage({ params, searchParams }: UserPageProps)
         </div>
 
         {/* 统计条 */}
-        <div className="relative z-10 grid grid-cols-3 mt-4 border-t" style={{ borderColor: "var(--line)" }}>
+        <div
+          className={`relative z-10 grid mt-4 border-t ${heroStats.length === 3 ? "grid-cols-3" : "grid-cols-2"}`}
+          style={{ borderColor: "var(--line)" }}
+        >
           {heroStats.map((s, i) => (
             <div
               key={s.label}
@@ -315,6 +325,7 @@ export default async function UserPage({ params, searchParams }: UserPageProps)
               commentData={commentData}
               commentError={commentError}
               page={page}
+              allowComments={allowComments}
             />
           ) : effectiveTab === "settings" && isOwner && currentUser ? (
             <div>
@@ -423,7 +434,11 @@ export default async function UserPage({ params, searchParams }: UserPageProps)
                 </li>
                 <li className="flex gap-2">
                   <span className="shrink-0 mt-px" style={{ color: "var(--accent)" }}>·</span>
-                  <span>昵称和头像会公开展示在帖子、评论和个人主页。</span>
+                  <span>
+                    {allowComments
+                      ? "昵称和头像会公开展示在帖子、评论和个人主页。"
+                      : "昵称和头像会公开展示在帖子和个人主页。"}
+                  </span>
                 </li>
                 <li className="flex gap-2">
                   <span className="shrink-0 mt-px" style={{ color: "var(--accent)" }}>·</span>
diff --git a/frontend/components/CommentSection.tsx b/frontend/components/CommentSection.tsx
index 42a861a..00fe776 100644
--- a/frontend/components/CommentSection.tsx
+++ b/frontend/components/CommentSection.tsx
@@ -6,7 +6,6 @@ import Link from "next/link";
 import {
   Trash2,
   MessagesSquare,
-  MessageSquareOff,
   ChevronRight,
   ChevronDown,
   BadgeCheck,
@@ -31,7 +30,8 @@ import {
 } from "@/lib/api";
 import { canModerateBoard } from "@/lib/roles";
 import { toast } from "@/lib/toast";
-import { realtime, RT_SETTINGS_CHANGED, type RtSettingsData } from "@/lib/realtime";
+import { useAllowComments } from "@/components/CommentsPolicyProvider";
+import CommentsUnsupported from "@/components/CommentsUnsupported";
 import Avatar from "./Avatar";
 import Pagination from "./Pagination";
 import MarkdownBodyClient from "@/components/MarkdownBodyClient";
@@ -57,8 +57,6 @@ interface CommentSectionProps {
   acceptedCommentId?: number;
   /** 抽奖已开奖：中奖楼层评论 ID（每名中奖者仅其最早主评一条） */
   winnerCommentIds?: number[];
-  /** 全站是否开放评论；缺省 true。关闭时隐藏发评/回复入口 */
-  allowComments?: boolean;
 }
 
 // 递归统计子树回复数（彻底删除级联提示用）
@@ -116,10 +114,10 @@ export default function CommentSection({
   acceptMode = null,
   acceptedCommentId = 0,
   winnerCommentIds = [],
-  allowComments: allowCommentsProp = true,
 }: CommentSectionProps) {
   const winnerCommentIdSet = new Set(winnerCommentIds.filter((id) => id > 0));
   const router = useRouter();
+  const commentsOpen = useAllowComments();
   const [content, setContent] = useState("");
   // 内联回复目标：在该评论下方就地发子评论（同一时间只有一个回复框）
   const [replyTarget, setReplyTarget] = useState<{ id: number; nickname: string } | null>(null);
@@ -141,25 +139,14 @@ export default function CommentSection({
   const [historyCommentId, setHistoryCommentId] = useState<number | null>(null);
   // 折叠状态：哪些楼层展开了子回复（默认全部折叠，SSR 初始为收起）
   const [expandedFloors, setExpandedFloors] = useState<Set<number>>(new Set());
-  const [commentsOpen, setCommentsOpen] = useState(allowCommentsProp !== false);
   const textareaRef = useRef<HTMLTextAreaElement>(null);
 
   useEffect(() => {
-    setCommentsOpen(allowCommentsProp !== false);
-  }, [allowCommentsProp]);
-
-  // 管理后台开关变更后即时隐藏发评入口（后端仍硬拒绝）
-  useEffect(() => {
-    return realtime.on<RtSettingsData>(RT_SETTINGS_CHANGED, (data) => {
-      if (typeof data?.allow_comments === "boolean") {
-        setCommentsOpen(data.allow_comments);
-        if (!data.allow_comments) {
-          setReplyTarget(null);
-          setReplyContent("");
-        }
-      }
-    });
-  }, []);
+    if (!commentsOpen) {
+      setReplyTarget(null);
+      setReplyContent("");
+    }
+  }, [commentsOpen]);
 
   const handleSubmit = async (e: React.FormEvent) => {
     e.preventDefault();
@@ -1017,6 +1004,10 @@ export default function CommentSection({
     );
   };
 
+  if (!commentsOpen) {
+    return <CommentsUnsupported />;
+  }
+
   return (
     <section className="panel p-6 sm:p-8 mt-6" aria-label="评论区">
       <div className="flex items-center gap-2.5 mb-6">
@@ -1032,34 +1023,7 @@ export default function CommentSection({
         <span className="meta ml-auto text-[11.5px]">共 {totalPages} 页楼层</span>
       </div>
 
-      {!commentsOpen ? (
-        <div
-          className="mb-8 rounded-2xl border px-5 py-6 text-center sm:px-6"
-          style={{
-            borderColor: "color-mix(in srgb, var(--ink-3) 35%, var(--line))",
-            background:
-              "repeating-linear-gradient(-45deg, transparent, transparent 6px, color-mix(in srgb, var(--ink-3) 8%, transparent) 6px, color-mix(in srgb, var(--ink-3) 8%, transparent) 7px), var(--panel-2)",
-          }}
-          role="status"
-        >
-          <span
-            className="mx-auto mb-3 flex h-11 w-11 items-center justify-center rounded-xl"
-            style={{
-              background: "color-mix(in srgb, var(--ink-3) 14%, transparent)",
-              color: "var(--ink-3)",
-            }}
-            aria-hidden
-          >
-            <MessageSquareOff size={22} />
-          </span>
-          <p className="text-[15px] font-semibold" style={{ color: "var(--ink)" }}>
-            评论功能暂时关闭
-          </p>
-          <p className="meta mt-1.5 text-[12.5px] leading-relaxed">
-            站点当前暂停发表新评论与回复，历史评论仍可浏览。
-          </p>
-        </div>
-      ) : user ? (
+      {user ? (
         <form onSubmit={handleSubmit} className="mb-8">
           <textarea
             ref={textareaRef}
@@ -1106,9 +1070,7 @@ export default function CommentSection({
             <p className="text-sm" style={{ color: "var(--ink-2)" }}>
               暂无评论
             </p>
-            <p className="meta text-[12.5px] mt-1">
-              {commentsOpen ? "来说两句，抢占沙发" : "评论开放后即可参与讨论"}
-            </p>
+            <p className="meta text-[12.5px] mt-1">来说两句，抢占沙发</p>
           </div>
         )}
       </div>
diff --git a/frontend/components/CommentsPolicyProvider.tsx b/frontend/components/CommentsPolicyProvider.tsx
new file mode 100644
index 0000000..ea30dad
--- /dev/null
+++ b/frontend/components/CommentsPolicyProvider.tsx
@@ -0,0 +1,52 @@
+"use client";
+
+import {
+  createContext,
+  useContext,
+  useEffect,
+  useRef,
+  useState,
+  type ReactNode,
+} from "react";
+import { useRouter } from "next/navigation";
+import { realtime, RT_SETTINGS_CHANGED, type RtSettingsData } from "@/lib/realtime";
+
+const AllowCommentsContext = createContext(true);
+
+/** 前台是否开放评论（SSR 初值 + 后台开关热更新） */
+export function useAllowComments(): boolean {
+  return useContext(AllowCommentsContext);
+}
+
+/**
+ * 根布局注入：关闭评论后前台立即隐藏评论区/数量；开启则刷新以拉回评论。
+ */
+export default function CommentsPolicyProvider({
+  allowComments,
+  children,
+}: {
+  allowComments: boolean;
+  children: ReactNode;
+}) {
+  const router = useRouter();
+  const [open, setOpen] = useState(allowComments);
+  const openRef = useRef(open);
+  openRef.current = open;
+
+  useEffect(() => {
+    setOpen(allowComments);
+  }, [allowComments]);
+
+  useEffect(() => {
+    return realtime.on<RtSettingsData>(RT_SETTINGS_CHANGED, (data) => {
+      if (typeof data?.allow_comments !== "boolean") return;
+      if (openRef.current === data.allow_comments) return;
+      setOpen(data.allow_comments);
+      router.refresh();
+    });
+  }, [router]);
+
+  return (
+    <AllowCommentsContext.Provider value={open}>{children}</AllowCommentsContext.Provider>
+  );
+}
diff --git a/frontend/components/CommentsUnsupported.tsx b/frontend/components/CommentsUnsupported.tsx
new file mode 100644
index 0000000..e2167d9
--- /dev/null
+++ b/frontend/components/CommentsUnsupported.tsx
@@ -0,0 +1,25 @@
+import { MessageSquareOff } from "lucide-react";
+
+/** 全站关闭评论时的前台说明：表达「不支持」而非暂时关闭，避免审核误判。 */
+export default function CommentsUnsupported() {
+  return (
+    <section className="panel p-6 sm:p-8 mt-6 text-center" aria-label="评论">
+      <span
+        className="mx-auto mb-3 flex h-11 w-11 items-center justify-center rounded-xl"
+        style={{
+          background: "color-mix(in srgb, var(--ink-3) 14%, transparent)",
+          color: "var(--ink-3)",
+        }}
+        aria-hidden
+      >
+        <MessageSquareOff size={22} />
+      </span>
+      <p className="text-[15px] font-semibold" style={{ color: "var(--ink)" }}>
+        本站不支持评论
+      </p>
+      <p className="meta mt-1.5 text-[12.5px] leading-relaxed">
+        站点未提供评论功能，讨论请通过发帖进行。
+      </p>
+    </section>
+  );
+}
diff --git a/frontend/components/MobilePostBar.tsx b/frontend/components/MobilePostBar.tsx
index a14f72c..25b1ad8 100644
--- a/frontend/components/MobilePostBar.tsx
+++ b/frontend/components/MobilePostBar.tsx
@@ -13,10 +13,12 @@ export default function MobilePostBar({
   postId,
   liked,
   likeCount,
+  allowComments = true,
 }: {
   postId: string;
   liked: boolean;
   likeCount: number;
+  allowComments?: boolean;
 }) {
   const [showTop, setShowTop] = useState(false);
 
@@ -53,15 +55,17 @@ export default function MobilePostBar({
           WebkitBackdropFilter: "blur(14px)",
         }}
       >
-        <button
-          type="button"
-          onClick={scrollToComments}
-          className="w-11 h-11 flex items-center justify-center rounded-full transition-colors hover:bg-[var(--accent-soft)] focus-visible:bg-[var(--accent-soft)]"
-          style={{ color: "var(--ink-2)" }}
-          aria-label="跳到评论框"
-        >
-          <MessageSquare size={18} />
-        </button>
+        {allowComments ? (
+          <button
+            type="button"
+            onClick={scrollToComments}
+            className="w-11 h-11 flex items-center justify-center rounded-full transition-colors hover:bg-[var(--accent-soft)] focus-visible:bg-[var(--accent-soft)]"
+            style={{ color: "var(--ink-2)" }}
+            aria-label="跳到评论框"
+          >
+            <MessageSquare size={18} />
+          </button>
+        ) : null}
         {/* 放大点赞按钮的触控区域（样式见 globals.css .j13-bar-like） */}
         <div className="j13-bar-like">
           <LikeButton postId={postId} liked={liked} likeCount={likeCount} variant="compact" />
diff --git a/frontend/components/PostInteractPanels.tsx b/frontend/components/PostInteractPanels.tsx
index eb174dc..6d2c151 100644
--- a/frontend/components/PostInteractPanels.tsx
+++ b/frontend/components/PostInteractPanels.tsx
@@ -17,6 +17,7 @@ import {
 } from "@/lib/api";
 import { toast } from "@/lib/toast";
 import Avatar from "@/components/Avatar";
+import { useAllowComments } from "@/components/CommentsPolicyProvider";
 
 export default function PostInteractPanels({
   postId,
@@ -177,6 +178,7 @@ function DeadlineCountdown({
 
 /** 正文下方的问答状态卡（未解决 / 仅标记已解决）；有采纳答案时改用 AcceptedAnswerCard */
 export function QuestionStatusCard({ postId, state }: { postId: number; state: QuestionState }) {
+  const allowComments = useAllowComments();
   const router = useRouter();
   const [busy, setBusy] = useState(false);
 
@@ -241,7 +243,7 @@ export function QuestionStatusCard({ postId, state }: { postId: number; state: Q
 
       <p className="j13-typed-meta">
         {state.solved
-          ? state.accepted_comment_id
+          ? state.accepted_comment_id && allowComments
             ? (
                 <>
                   已采纳{" "}
@@ -255,7 +257,9 @@ export function QuestionStatusCard({ postId, state }: { postId: number; state: Q
                 </>
               )
             : "作者已标记为已解决"
-          : "可在评论旁采纳答案，或手动标记已解决"}
+          : allowComments
+            ? "可在评论旁采纳答案，或手动标记已解决"
+            : "可由作者标记为已解决"}
       </p>
 
       <div className="j13-typed-foot">
@@ -466,6 +470,7 @@ function PollPanel({
 }
 
 function BountyPanel({ state }: { postId: number; state: BountyState }) {
+  const allowComments = useAllowComments();
   const statusBadge = state.accepted_comment_id
     ? { cls: "badge-status badge-status-solved", label: "已采纳" }
     : state.expired || state.refunded
@@ -507,7 +512,7 @@ function BountyPanel({ state }: { postId: number; state: BountyState }) {
       <p className="j13-typed-meta">
         <span className="j13-bounty-points tabular-nums">{state.points} 积分</span>
         {bodyHint ? ` · ${bodyHint}` : null}
-        {state.can_accept ? " · 在评论旁点击「采纳」发放积分" : null}
+        {state.can_accept && allowComments ? " · 在评论旁点击「采纳」发放积分" : null}
       </p>
 
       {!state.accepted_comment_id && state.ends_at ? (
@@ -518,7 +523,7 @@ function BountyPanel({ state }: { postId: number; state: BountyState }) {
         />
       ) : null}
 
-      {state.accepted_comment_id > 0 && (
+      {allowComments && state.accepted_comment_id > 0 && (
         <p className="j13-typed-meta">
           已采纳{" "}
           <a
diff --git a/frontend/components/PostRow.tsx b/frontend/components/PostRow.tsx
index 0392148..8068902 100644
--- a/frontend/components/PostRow.tsx
+++ b/frontend/components/PostRow.tsx
@@ -2,6 +2,7 @@ import Link from "next/link";
 import { ArrowLeft } from "lucide-react";
 import type { PostListItem } from "@/lib/api";
 import { formatRelative } from "@/lib/format";
+import { getPublicSettingsCached } from "@/lib/serverData";
 import { normalizePostType, postTypeLabel, contentAccessLabel, typeStatusLabel, typeStatusClass } from "@/lib/postMeta";
 import LikeButton from "./LikeButton";
 import Avatar from "./Avatar";
@@ -15,7 +16,7 @@ import { IconComment, IconEye } from "./Icons";
  * 点击：标题 stretch-link 铺满整行进帖；仅头像/作者/回复者/点赞等加 above-link 抬层。
  * 板块胶囊仅展示，不可点，避免误进板块筛选。
  */
-export default function PostRow({
+export default async function PostRow({
   post,
   showBoard = false,
   index = 0,
@@ -31,8 +32,12 @@ export default function PostRow({
   showViews?: boolean;
   showLike?: boolean;
 }) {
+  const allowComments = (await getPublicSettingsCached()).allow_comments !== false;
   const lastReply = post.last_reply;
-  const replied = lastReply && new Date(lastReply.created_at).getTime() > new Date(post.created_at).getTime() + 60_000;
+  const replied =
+    allowComments &&
+    lastReply &&
+    new Date(lastReply.created_at).getTime() > new Date(post.created_at).getTime() + 60_000;
   const pt = normalizePostType(post.post_type);
   const statusBadge = pt !== "discussion" ? typeStatusLabel(pt, post.type_status) : "";
   const statusClass = statusBadge ? typeStatusClass(pt, post.type_status) : "";
@@ -115,7 +120,7 @@ export default function PostRow({
               <span className="tabular-nums shrink-0">{formatRelative(lastReply!.created_at)}</span>
             </span>
           )}
-          {!replied && post.comment_count === 0 && (
+          {!replied && allowComments && post.comment_count === 0 && (
             <span className="hidden sm:inline" aria-hidden>
               · 暂无回复
             </span>
@@ -124,15 +129,17 @@ export default function PostRow({
       </div>
 
       <div className="flex items-center gap-3 sm:gap-4 shrink-0">
-        <Link
-          href={`/post/${post.id}`}
-          tabIndex={-1}
-          aria-label={`${post.comment_count} 条评论`}
-          className={`${showViews ? "hidden sm:inline-flex" : "inline-flex"} above-link items-center gap-1.5 meta tabular-nums text-[13.5px] hover:text-[var(--accent)] transition-colors`}
-        >
-          <IconComment size={17} />
-          {post.comment_count}
-        </Link>
+        {allowComments ? (
+          <Link
+            href={`/post/${post.id}`}
+            tabIndex={-1}
+            aria-label={`${post.comment_count} 条评论`}
+            className={`${showViews ? "hidden sm:inline-flex" : "inline-flex"} above-link items-center gap-1.5 meta tabular-nums text-[13.5px] hover:text-[var(--accent)] transition-colors`}
+          >
+            <IconComment size={17} />
+            {post.comment_count}
+          </Link>
+        ) : null}
         {showViews && (
           <span
             className="hidden md:inline-flex items-center gap-1.5 meta tabular-nums"
diff --git a/frontend/components/admin/AdminField.tsx b/frontend/components/admin/AdminField.tsx
new file mode 100644
index 0000000..f776cc7
--- /dev/null
+++ b/frontend/components/admin/AdminField.tsx
@@ -0,0 +1,81 @@
+import type { ChangeEvent, ReactNode } from "react";
+
+/** 后台文本框：与聊天搜索同款壳层，聚焦只画外框一圈 */
+export default function AdminField({
+  id,
+  label,
+  hint,
+  value,
+  onChange,
+  placeholder,
+  maxLength,
+  as = "input",
+  type = "text",
+  autoComplete,
+  disabled,
+  className = "",
+  minHeight,
+}: {
+  id: string;
+  label: ReactNode;
+  hint?: ReactNode;
+  value: string;
+  onChange: (v: string) => void;
+  placeholder?: string;
+  maxLength?: number;
+  as?: "input" | "textarea";
+  type?: string;
+  autoComplete?: string;
+  disabled?: boolean;
+  className?: string;
+  minHeight?: string;
+}) {
+  const handle = (e: ChangeEvent<HTMLInputElement | HTMLTextAreaElement>) =>
+    onChange(e.target.value);
+
+  return (
+    <div className={className}>
+      <div className="admin-field-head">
+        <label className="field-label" htmlFor={id}>
+          {label}
+        </label>
+        {maxLength != null && (
+          <span className="admin-field-count" aria-hidden>
+            {value.length}/{maxLength}
+          </span>
+        )}
+      </div>
+      {hint != null && hint !== "" && (
+        <p className="meta text-[12.5px] mb-2.5 leading-relaxed">{hint}</p>
+      )}
+      {as === "textarea" ? (
+        <div className="admin-field-shell is-area">
+          <textarea
+            id={id}
+            className="admin-field-input"
+            style={minHeight ? { minHeight } : undefined}
+            maxLength={maxLength}
+            value={value}
+            onChange={handle}
+            placeholder={placeholder}
+            disabled={disabled}
+          />
+        </div>
+      ) : (
+        <div className="admin-field-shell">
+          <input
+            id={id}
+            type={type}
+            className="admin-field-input"
+            maxLength={maxLength}
+            value={value}
+            onChange={handle}
+            placeholder={placeholder}
+            autoComplete={autoComplete}
+            disabled={disabled}
+          />
+        </div>
+      )}
+    </div>
+  );
+}
diff --git a/frontend/components/admin/AdminSearchField.tsx b/frontend/components/admin/AdminSearchField.tsx
index 8720c4e..6bf3b36 100644
--- a/frontend/components/admin/AdminSearchField.tsx
+++ b/frontend/components/admin/AdminSearchField.tsx
@@ -3,7 +3,7 @@
 import { Search, X } from "lucide-react";
 import type { FormEvent } from "react";
 
-/** 左图标、可清除、Enter 提交；不要再并排「搜索」按钮 */
+/** 左图标、可清除、Enter 提交；壳层聚焦与聊天搜索一致 */
 export default function AdminSearchField({
   value,
   onChange,
@@ -30,11 +30,11 @@ export default function AdminSearchField({
   };
 
   return (
-    <form onSubmit={handleSubmit} className="relative flex-1 min-w-0" role="search">
+    <form onSubmit={handleSubmit} className="admin-field-shell admin-search-shell relative flex-1 min-w-0" role="search">
       <Search
         size={15}
-        className="absolute left-3.5 top-1/2 -translate-y-1/2 pointer-events-none"
-        style={{ color: "var(--ink-3)" }}
+        className="shrink-0 pointer-events-none"
+        style={{ color: value ? "var(--accent)" : "var(--ink-3)" }}
         aria-hidden
       />
       <input
@@ -43,14 +43,14 @@ export default function AdminSearchField({
         onChange={(e) => onChange(e.target.value)}
         placeholder={placeholder}
         aria-label={ariaLabel}
-        className="field pl-10 pr-9 py-2.5"
+        className="admin-field-input"
       />
       {value ? (
         <button
           type="button"
           onClick={clear}
           aria-label="清除搜索"
-          className="absolute right-2.5 top-1/2 -translate-y-1/2 w-6 h-6 inline-flex items-center justify-center rounded-full transition-colors hover:bg-[var(--panel-2)]"
+          className="w-6 h-6 inline-flex items-center justify-center rounded-full shrink-0 transition-colors hover:bg-[var(--accent-soft)]"
           style={{ color: "var(--ink-3)" }}
         >
           <X size={14} />
diff --git a/frontend/components/admin/AdminStepper.tsx b/frontend/components/admin/AdminStepper.tsx
new file mode 100644
index 0000000..7d57eee
--- /dev/null
+++ b/frontend/components/admin/AdminStepper.tsx
@@ -0,0 +1,94 @@
+"use client";
+
+import { Minus, Plus } from "lucide-react";
+import { useEffect, useState, type KeyboardEvent } from "react";
+
+/** 后台数字步进器：0 是合法值；加减与手输都会提交数字 */
+export default function AdminStepper({
+  id,
+  value,
+  onChange,
+  min = 0,
+  max = 999,
+  step = 1,
+  unit,
+  ariaLabel,
+  disabled,
+}: {
+  id?: string;
+  value: number;
+  onChange: (n: number) => void;
+  min?: number;
+  max?: number;
+  step?: number;
+  unit?: string;
+  ariaLabel: string;
+  disabled?: boolean;
+}) {
+  const clamp = (n: number) => Math.min(max, Math.max(min, Math.round(n)));
+  const [text, setText] = useState(() => String(value));
+
+  useEffect(() => {
+    setText(String(value));
+  }, [value]);
+
+  const emit = (n: number) => {
+    const next = clamp(Number.isFinite(n) ? n : min);
+    onChange(next);
+    setText(String(next));
+  };
+
+  const onKeyDown = (e: KeyboardEvent<HTMLInputElement>) => {
+    if (e.key === "ArrowUp") {
+      e.preventDefault();
+      emit(value + step);
+    } else if (e.key === "ArrowDown") {
+      e.preventDefault();
+      emit(value - step);
+    }
+  };
+
+  return (
+    <div className={`admin-stepper${disabled ? " is-disabled" : ""}`}>
+      <button
+        type="button"
+        className="admin-stepper-btn"
+        onClick={() => emit(value - step)}
+        disabled={disabled || value <= min}
+        aria-label="减少"
+        tabIndex={-1}
+      >
+        <Minus size={14} />
+      </button>
+      <input
+        id={id}
+        className="admin-stepper-input"
+        type="text"
+        inputMode="numeric"
+        value={text}
+        aria-label={ariaLabel}
+        disabled={disabled}
+        onFocus={(e) => e.target.select()}
+        onChange={(e) => {
+          const raw = e.target.value.replace(/[^\d]/g, "");
+          setText(raw);
+          if (raw === "") return;
+          onChange(clamp(Number(raw)));
+        }}
+        onBlur={() => emit(text === "" ? min : Number(text))}
+        onKeyDown={onKeyDown}
+      />
+      {unit ? <span className="admin-stepper-unit">{unit}</span> : null}
+      <button
+        type="button"
+        className="admin-stepper-btn"
+        onClick={() => emit(value + step)}
+        disabled={disabled || value >= max}
+        aria-label="增加"
+        tabIndex={-1}
+      >
+        <Plus size={14} />
+      </button>
+    </div>
+  );
+}
diff --git a/frontend/components/admin/index.ts b/frontend/components/admin/index.ts
index 0b1d6d2..01aa924 100644
--- a/frontend/components/admin/index.ts
+++ b/frontend/components/admin/index.ts
@@ -5,6 +5,8 @@ export { default as AdminSettingRow } from "./AdminSettingRow";
 export { default as AdminSegmented } from "./AdminSegmented";
 export type { AdminSegmentOption } from "./AdminSegmented";
 export { default as AdminSearchField } from "./AdminSearchField";
+export { default as AdminField } from "./AdminField";
+export { default as AdminStepper } from "./AdminStepper";
 export { default as AdminPager } from "./AdminPager";
 export { default as AdminEmpty } from "./AdminEmpty";
 export { default as AdminStatCard } from "./AdminStatCard";
diff --git a/frontend/components/home/BoardPanels.tsx b/frontend/components/home/BoardPanels.tsx
index f961cfd..6e4faf2 100644
--- a/frontend/components/home/BoardPanels.tsx
+++ b/frontend/components/home/BoardPanels.tsx
@@ -85,9 +85,11 @@ function BoardIntro({ board }: { board: BoardWithCount }) {
 function BoardPulse({
   stats,
   checkin,
+  allowComments,
 }: {
   stats: BoardSidebarStats;
   checkin?: CheckinStatus | null;
+  allowComments: boolean;
 }) {
   const cells = [
     {
@@ -104,20 +106,24 @@ function BoardPulse({
       foot: "本日新增",
       up: stats.today_posts > 0,
     },
-    {
-      icon: <MessageCircle size={12.5} />,
-      label: "回复总数",
-      value: formatCompact(stats.comment_count),
-      foot: `+${formatCompact(stats.today_comments)} 今日`,
-      up: true,
-    },
-    {
-      icon: <Heart size={12.5} />,
-      label: "今日回复",
-      value: formatCompact(stats.today_comments),
-      foot: "本日新增",
-      up: stats.today_comments > 0,
-    },
+    ...(allowComments
+      ? [
+          {
+            icon: <MessageCircle size={12.5} />,
+            label: "回复总数",
+            value: formatCompact(stats.comment_count),
+            foot: `+${formatCompact(stats.today_comments)} 今日`,
+            up: true,
+          },
+          {
+            icon: <Heart size={12.5} />,
+            label: "今日回复",
+            value: formatCompact(stats.today_comments),
+            foot: "本日新增",
+            up: stats.today_comments > 0,
+          },
+        ]
+      : []),
   ];
   return (
     <section className="j13-module" aria-label="板块数据">
@@ -150,7 +156,7 @@ function BoardPulse({
 
 /* ---------- 4. 本板热门 ---------- */
 
-function BoardHot({ posts }: { posts: PostListItem[] }) {
+function BoardHot({ posts, allowComments }: { posts: PostListItem[]; allowComments: boolean }) {
   return (
     <section className="j13-module" aria-label="本板热门">
       <p className="j13-module-title mb-1.5">
@@ -169,9 +175,11 @@ function BoardHot({ posts }: { posts: PostListItem[] }) {
                     {p.title}
                   </span>
                   <span className="mt-1 flex items-center gap-2.5 meta text-[11.5px]">
-                    <span className="inline-flex items-center gap-1">
-                      <MessageCircle size={11.5} /> {p.comment_count}
-                    </span>
+                    {allowComments ? (
+                      <span className="inline-flex items-center gap-1">
+                        <MessageCircle size={11.5} /> {p.comment_count}
+                      </span>
+                    ) : null}
                     <span className="inline-flex items-center gap-1">
                       <Heart size={11.5} /> {p.like_count}
                     </span>
@@ -188,7 +196,7 @@ function BoardHot({ posts }: { posts: PostListItem[] }) {
 
 /* ---------- 5. 本板活跃 ---------- */
 
-function BoardActive({ users }: { users: ActiveUser[] }) {
+function BoardActive({ users, allowComments }: { users: ActiveUser[]; allowComments: boolean }) {
   return (
     <section className="j13-module" aria-label="本板活跃成员">
       <p className="j13-module-title mb-2">
@@ -221,17 +229,23 @@ function BoardActive({ users }: { users: ActiveUser[] }) {
                       <span className="inline-flex items-center gap-1">
                         <PenLine size={10.5} /> 发帖 {u.post_count}
                       </span>
-                      <span className="inline-flex items-center gap-1">
-                        <MessageCircle size={10.5} /> 回复 {u.comment_count}
-                      </span>
+                      {allowComments ? (
+                        <span className="inline-flex items-center gap-1">
+                          <MessageCircle size={10.5} /> 回复 {u.comment_count}
+                        </span>
+                      ) : null}
                     </span>
                   </span>
                   <span
                     className="shrink-0 text-[13px] tabular-nums"
                     style={{ color: "var(--accent)" }}
-                    aria-label={`本周共 ${u.post_count + u.comment_count} 次互动`}
+                    aria-label={
+                      allowComments
+                        ? `本周共 ${u.post_count + u.comment_count} 次互动`
+                        : `本周发帖 ${u.post_count}`
+                    }
                   >
-                    {u.post_count + u.comment_count}
+                    {allowComments ? u.post_count + u.comment_count : u.post_count}
                   </span>
                 </Link>
               </li>
@@ -252,6 +266,7 @@ type BoardPanelsProps = {
   hot: PostListItem[];
   activeUsers: ActiveUser[];
   checkin?: CheckinStatus | null;
+  allowComments: boolean;
 };
 
 function BoardPanelsBody(props: BoardPanelsProps) {
@@ -259,9 +274,9 @@ function BoardPanelsBody(props: BoardPanelsProps) {
     <>
       <Moderators items={props.moderators} />
       <BoardIntro board={props.board} />
-      <BoardPulse stats={props.stats} checkin={props.checkin} />
-      <BoardHot posts={props.hot} />
-      <BoardActive users={props.activeUsers} />
+      <BoardPulse stats={props.stats} checkin={props.checkin} allowComments={props.allowComments} />
+      <BoardHot posts={props.hot} allowComments={props.allowComments} />
+      <BoardActive users={props.activeUsers} allowComments={props.allowComments} />
     </>
   );
 }
diff --git a/frontend/components/home/CommunityPanels.tsx b/frontend/components/home/CommunityPanels.tsx
index 09960e5..e8e5fb5 100644
--- a/frontend/components/home/CommunityPanels.tsx
+++ b/frontend/components/home/CommunityPanels.tsx
@@ -27,7 +27,15 @@ import { formatCompact, formatShortDate } from "@/lib/format";
 
 /* ---------- 站点数据（2×2 bento 统计瓦片） ---------- */
 
-function PulseCard({ stats, checkin }: { stats: OverviewStats; checkin?: CheckinStatus | null }) {
+function PulseCard({
+  stats,
+  checkin,
+  allowComments,
+}: {
+  stats: OverviewStats;
+  checkin?: CheckinStatus | null;
+  allowComments: boolean;
+}) {
   const cells = [
     {
       icon: <Users size={12.5} />,
@@ -43,13 +51,25 @@ function PulseCard({ stats, checkin }: { stats: OverviewStats; checkin?: Checkin
       foot: `+${formatCompact(stats.today_posts)} 今日`,
       up: true,
     },
-    {
-      icon: <MessageCircle size={12.5} />,
-      label: "回复总数",
-      value: formatCompact(stats.comments),
-      foot: `+${formatCompact(stats.today_comments)} 今日`,
-      up: true,
-    },
+    ...(allowComments
+      ? [
+          {
+            icon: <MessageCircle size={12.5} />,
+            label: "回复总数",
+            value: formatCompact(stats.comments),
+            foot: `+${formatCompact(stats.today_comments)} 今日`,
+            up: true,
+          },
+        ]
+      : [
+          {
+            icon: <TrendingUp size={12.5} />,
+            label: "今日新帖",
+            value: formatCompact(stats.today_posts),
+            foot: "本日新增",
+            up: stats.today_posts > 0,
+          },
+        ]),
     {
       icon: <Activity size={12.5} />,
       label: "在线用户",
@@ -138,7 +158,7 @@ function Announcements({ items }: { items: AnnouncementSummary[] }) {
 
 /* ---------- 热门榜 ---------- */
 
-function HotRanking({ posts }: { posts: PostListItem[] }) {
+function HotRanking({ posts, allowComments }: { posts: PostListItem[]; allowComments: boolean }) {
   return (
     <section className="j13-module" aria-label="热门讨论">
       <p className="j13-module-title mb-1.5">
@@ -157,9 +177,11 @@ function HotRanking({ posts }: { posts: PostListItem[] }) {
                     {p.title}
                   </span>
                   <span className="mt-1 flex items-center gap-2.5 meta text-[11.5px]">
-                    <span className="inline-flex items-center gap-1">
-                      <MessageCircle size={11.5} /> {p.comment_count}
-                    </span>
+                    {allowComments ? (
+                      <span className="inline-flex items-center gap-1">
+                        <MessageCircle size={11.5} /> {p.comment_count}
+                      </span>
+                    ) : null}
                     <span className="inline-flex items-center gap-1">
                       <Heart size={11.5} /> {p.like_count}
                     </span>
@@ -211,7 +233,7 @@ function NewUsers({ users }: { users: NewUser[] }) {
 
 /* ---------- 活跃成员（本周发帖 / 回复） ---------- */
 
-function ActiveUsers({ users }: { users: ActiveUser[] }) {
+function ActiveUsers({ users, allowComments }: { users: ActiveUser[]; allowComments: boolean }) {
   return (
     <section className="j13-module" aria-label="本周活跃成员">
       <p className="j13-module-title mb-2">
@@ -241,17 +263,23 @@ function ActiveUsers({ users }: { users: ActiveUser[] }) {
                       <span className="inline-flex items-center gap-1">
                         <PenLine size={10.5} /> 发帖 {u.post_count}
                       </span>
-                      <span className="inline-flex items-center gap-1">
-                        <MessageCircle size={10.5} /> 回复 {u.comment_count}
-                      </span>
+                      {allowComments ? (
+                        <span className="inline-flex items-center gap-1">
+                          <MessageCircle size={10.5} /> 回复 {u.comment_count}
+                        </span>
+                      ) : null}
                     </span>
                   </span>
                   <span
                     className="shrink-0 text-[13px] tabular-nums"
                     style={{ color: "var(--accent)" }}
-                    aria-label={`本周共 ${u.post_count + u.comment_count} 次互动`}
+                    aria-label={
+                      allowComments
+                        ? `本周共 ${u.post_count + u.comment_count} 次互动`
+                        : `本周发帖 ${u.post_count}`
+                    }
                   >
-                    {u.post_count + u.comment_count}
+                    {allowComments ? u.post_count + u.comment_count : u.post_count}
                   </span>
                 </Link>
               </li>
@@ -309,46 +337,44 @@ type PanelsProps = {
   announcements: AnnouncementSummary[];
   newUsers: NewUser[];
   checkin?: CheckinStatus | null;
+  allowComments: boolean;
 };
 
-export function CommunityPanels({
+function CommunityPanelsBody({
   stats,
   hot,
   activeUsers,
   announcements,
   newUsers,
   checkin,
+  allowComments,
 }: PanelsProps) {
+  return (
+    <>
+      <PulseCard stats={stats} checkin={checkin} allowComments={allowComments} />
+      <Announcements items={announcements} />
+      <HotRanking posts={hot} allowComments={allowComments} />
+      <NewUsers users={newUsers} />
+      <ActiveUsers users={activeUsers} allowComments={allowComments} />
+      <FriendLinks />
+    </>
+  );
+}
+
+export function CommunityPanels(props: PanelsProps) {
   return (
     <aside className="hidden w-[280px] shrink-0 lg:block xl:w-[300px]" aria-label="社区面板">
       <div className="sticky top-24 space-y-4">
-        <PulseCard stats={stats} checkin={checkin} />
-        <Announcements items={announcements} />
-        <HotRanking posts={hot} />
-        <NewUsers users={newUsers} />
-        <ActiveUsers users={activeUsers} />
-        <FriendLinks />
+        <CommunityPanelsBody {...props} />
       </div>
     </aside>
   );
 }
 
-export function CommunityPanelsMobile({
-  stats,
-  hot,
-  activeUsers,
-  announcements,
-  newUsers,
-  checkin,
-}: PanelsProps) {
+export function CommunityPanelsMobile(props: PanelsProps) {
   return (
     <div className="space-y-4 lg:hidden" aria-label="社区面板">
-      <PulseCard stats={stats} checkin={checkin} />
-      <Announcements items={announcements} />
-      <HotRanking posts={hot} />
-      <NewUsers users={newUsers} />
-      <ActiveUsers users={activeUsers} />
-      <FriendLinks />
+      <CommunityPanelsBody {...props} />
     </div>
   );
 }
diff --git a/frontend/components/home/FeedTabs.tsx b/frontend/components/home/FeedTabs.tsx
index 5cb26bf..226506d 100644
--- a/frontend/components/home/FeedTabs.tsx
+++ b/frontend/components/home/FeedTabs.tsx
@@ -4,6 +4,7 @@ import Link from "next/link";
 import { useRouter } from "next/navigation";
 import { useRef } from "react";
 import { MessageSquareText, Clock, Sparkles } from "lucide-react";
+import { useAllowComments } from "@/components/CommentsPolicyProvider";
 
 export type FeedSort = "latest" | "new" | "recommended";
 
@@ -22,18 +23,20 @@ function tabHref(key: FeedSort, boardId: number) {
 export default function FeedTabs({ current, boardId = 0 }: { current: FeedSort; boardId?: number }) {
   const router = useRouter();
   const tabRefs = useRef<(HTMLAnchorElement | null)[]>([]);
+  const allowComments = useAllowComments();
+  const keys = allowComments ? TAB_KEYS : TAB_KEYS.filter((k) => k !== "latest");
 
   const handleKeyDown = (e: React.KeyboardEvent, i: number) => {
     if (e.key !== "ArrowRight" && e.key !== "ArrowLeft") return;
     e.preventDefault();
-    const next = (i + (e.key === "ArrowRight" ? 1 : TAB_KEYS.length - 1)) % TAB_KEYS.length;
+    const next = (i + (e.key === "ArrowRight" ? 1 : keys.length - 1)) % keys.length;
     tabRefs.current[next]?.focus();
-    router.push(tabHref(TAB_KEYS[next], boardId));
+    router.push(tabHref(keys[next], boardId));
   };
 
   return (
     <div className="flex items-center gap-1.5 sm:gap-2" role="tablist" aria-label="帖子排序">
-      {TAB_KEYS.map((key, i) => {
+      {keys.map((key, i) => {
         const Icon = key === "latest" ? MessageSquareText : key === "new" ? Clock : Sparkles;
         return (
           <Link
diff --git a/frontend/lib/api.ts b/frontend/lib/api.ts
index 480f64f..2019742 100644
--- a/frontend/lib/api.ts
+++ b/frontend/lib/api.ts
@@ -594,7 +594,7 @@ export interface PublicSettings {
   site_name: string;
   site_description: string;
   allow_register: boolean;
-  /** 全站是否开放评论/回复；缺省 true */
+  /** 全站是否开放评论；关闭后前台不展示评论能力 */
   allow_comments: boolean;
   post_cooldown_hours: number;
   /** 超过 N 行的代码块是否默认折叠；缺省 true */