diff --git a/app/(admin)/_components/admin-layout-shell.tsx b/app/(admin)/_components/admin-layout-shell.tsx
new file mode 100644
index 000000000..8dc2a86b3
--- /dev/null
+++ b/app/(admin)/_components/admin-layout-shell.tsx
@@ -0,0 +1,30 @@
+"use client";
+
+import type { ComponentProps, ReactNode } from "react";
+import { usePathname } from "next/navigation";
+import { TopNavbar } from "@/components/top-navbar";
+
+type AdminLayoutShellProps = ComponentProps<typeof TopNavbar> & {
+  children: ReactNode;
+};
+
+function shouldHideSidebarChrome(pathname: string) {
+  return pathname === "/settings";
+}
+
+export function AdminLayoutShell({
+  children,
+  ...topNavbarProps
+}: AdminLayoutShellProps) {
+  const pathname = usePathname();
+  const hideSidebarChrome = shouldHideSidebarChrome(pathname);
+
+  return (
+    <div className="flex min-h-screen flex-col bg-background">
+      {hideSidebarChrome ? null : <TopNavbar {...topNavbarProps} />}
+      <div className={hideSidebarChrome ? "flex-1" : "flex-1 pl-16"}>
+        {children}
+      </div>
+    </div>
+  );
+}
diff --git a/app/(admin)/layout.tsx b/app/(admin)/layout.tsx
index fd960eca7..703e03359 100644
--- a/app/(admin)/layout.tsx
+++ b/app/(admin)/layout.tsx
@@ -1,6 +1,6 @@
 import { auth } from "@/app/(auth)/auth";
-import { TopNavbar } from "@/components/top-navbar";
 import { getSiteSettings, getNavLinks, getTutorialVideos } from "@/lib/db/queries";
+import { AdminLayoutShell } from "./_components/admin-layout-shell";
 
 export default async function AdminLayout({
   children,
@@ -21,38 +21,37 @@ export default async function AdminLayout({
         : null;
 
   return (
-    <div className="flex min-h-screen flex-col bg-background">
-      <TopNavbar
-        siteName={siteSettings.siteName}
-        siteLogo={siteSettings.siteLogo || undefined}
-        siteLogoDark={siteSettings.siteLogoDark || undefined}
-        isAdmin={session?.user?.type === "admin" || session?.user?.type === "agent_admin"}
-        settingsHref={settingsHref}
-        customLinks={navLinks.map((link) => ({
-          id: link.id,
-          name: link.name,
-          url: link.url,
-          order: link.order,
-          toolboxGroup: link.toolboxGroup || 1,
-        }))}
-        toolbox1Name={siteSettings.toolbox1Name || "工具箱"}
-        toolbox1Enabled={siteSettings.toolbox1Enabled ?? true}
-        toolbox2Name={siteSettings.toolbox2Name || "工具箱2"}
-        toolbox2Enabled={siteSettings.toolbox2Enabled ?? false}
-        tutorialVideos={tutorialVideos.map(v => ({
-          id: v.id,
-          title: v.title,
-          videoUrl: v.videoUrl,
-          coverUrl: v.coverUrl,
-          description: v.description,
-          order: v.order,
-        }))}
-        tutorialEnabled={siteSettings.tutorialEnabled ?? false}
-        rankingEnabled={siteSettings.rankingEnabled ?? true}
-        productPlanningEnabled={(siteSettings as any).productPlanningEnabled ?? true}
-        videoCanvasEnabled={(siteSettings as any).videoCanvasEnabled ?? true}
-      />
-      <div className="flex-1 pl-16">{children}</div>
-    </div>
+    <AdminLayoutShell
+      siteName={siteSettings.siteName}
+      siteLogo={siteSettings.siteLogo || undefined}
+      siteLogoDark={siteSettings.siteLogoDark || undefined}
+      isAdmin={session?.user?.type === "admin" || session?.user?.type === "agent_admin"}
+      settingsHref={settingsHref}
+      customLinks={navLinks.map((link) => ({
+        id: link.id,
+        name: link.name,
+        url: link.url,
+        order: link.order,
+        toolboxGroup: link.toolboxGroup || 1,
+      }))}
+      toolbox1Name={siteSettings.toolbox1Name || "工具箱"}
+      toolbox1Enabled={siteSettings.toolbox1Enabled ?? true}
+      toolbox2Name={siteSettings.toolbox2Name || "工具箱2"}
+      toolbox2Enabled={siteSettings.toolbox2Enabled ?? false}
+      tutorialVideos={tutorialVideos.map((v) => ({
+        id: v.id,
+        title: v.title,
+        videoUrl: v.videoUrl,
+        coverUrl: v.coverUrl,
+        description: v.description,
+        order: v.order,
+      }))}
+      tutorialEnabled={siteSettings.tutorialEnabled ?? false}
+      rankingEnabled={siteSettings.rankingEnabled ?? true}
+      productPlanningEnabled={(siteSettings as any).productPlanningEnabled ?? true}
+      videoCanvasEnabled={(siteSettings as any).videoCanvasEnabled ?? true}
+    >
+      {children}
+    </AdminLayoutShell>
   );
 }
diff --git a/app/(admin)/settings/_components/admin-settings-navigation.tsx b/app/(admin)/settings/_components/admin-settings-navigation.tsx
index 5fc9010c0..acb571cbe 100644
--- a/app/(admin)/settings/_components/admin-settings-navigation.tsx
+++ b/app/(admin)/settings/_components/admin-settings-navigation.tsx
@@ -1,91 +1,272 @@
 "use client";
 
 import Link from "next/link";
-import { TabsList, TabsTrigger } from "@/components/ui/tabs";
+import { ArrowLeft, ChevronDown } from "lucide-react";
+import { Button } from "@/components/ui/button";
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuLabel,
+  DropdownMenuSeparator,
+  DropdownMenuTrigger,
+} from "@/components/ui/dropdown-menu";
+import {
+  Select,
+  SelectContent,
+  SelectGroup,
+  SelectItem,
+  SelectLabel,
+  SelectSeparator,
+  SelectTrigger,
+  SelectValue,
+} from "@/components/ui/select";
+import { Separator } from "@/components/ui/separator";
 import { ADMIN_SETTINGS_NAV_GROUPS } from "../_lib/settings-navigation";
+import type { AdminSettingsNavGroup, AdminSettingsNavItem } from "../_lib/types";
 import { SettingStatusBadge } from "./setting-status-badge";
 
-export function AdminSettingsNavigation({ activeTab }: { activeTab: string }) {
+function getActiveGroup(activeTab: string) {
+  return ADMIN_SETTINGS_NAV_GROUPS.find((group) =>
+    group.items.some((item) => item.value === activeTab)
+  );
+}
+
+function getActiveItem(activeTab: string) {
+  return ADMIN_SETTINGS_NAV_GROUPS.flatMap((group) => group.items).find(
+    (item) => item.value === activeTab
+  );
+}
+
+function SettingsGroupDropdown({
+  activeTab,
+  group,
+  onTabChange,
+}: {
+  activeTab: string;
+  group: AdminSettingsNavGroup;
+  onTabChange: (value: string) => void;
+}) {
+  const hasActiveTab = group.items.some((item) => item.value === activeTab);
+
   return (
-    <div className="rounded-xl border bg-background">
-      <div className="border-b bg-muted/20 px-5 py-4">
-        <div className="flex flex-col gap-1">
+    <DropdownMenu>
+      <DropdownMenuTrigger asChild>
+        <Button
+          className="h-10 rounded-full px-4"
+          size="sm"
+          variant={hasActiveTab ? "default" : "outline"}
+        >
+          <span>{group.title}</span>
+          <ChevronDown className="h-4 w-4" />
+        </Button>
+      </DropdownMenuTrigger>
+      <DropdownMenuContent align="start" className="w-80">
+        <DropdownMenuLabel>{group.title}</DropdownMenuLabel>
+        <DropdownMenuSeparator />
+        {group.items.map((item) => {
+          const Icon = item.icon;
+          const itemContent = (
+            <>
+              <Icon className="h-4 w-4 text-muted-foreground" />
+              <div className="min-w-0 flex-1">
+                <div className="font-medium text-sm">{item.label}</div>
+                <div className="truncate text-muted-foreground text-xs">
+                  {item.description}
+                </div>
+              </div>
+              {item.value === activeTab ? (
+                <SettingStatusBadge tone="enabled">当前</SettingStatusBadge>
+              ) : null}
+            </>
+          );
+
+          if (item.href) {
+            return (
+              <DropdownMenuItem asChild key={item.value}>
+                <Link href={item.href}>{itemContent}</Link>
+              </DropdownMenuItem>
+            );
+          }
+
+          return (
+            <DropdownMenuItem
+              key={item.value}
+              onSelect={() => onTabChange(item.value)}
+            >
+              {itemContent}
+            </DropdownMenuItem>
+          );
+        })}
+      </DropdownMenuContent>
+    </DropdownMenu>
+  );
+}
+
+function SettingsQuickAction({
+  activeTab,
+  item,
+  onTabChange,
+}: {
+  activeTab: string;
+  item: AdminSettingsNavItem;
+  onTabChange: (value: string) => void;
+}) {
+  const Icon = item.icon;
+  const className =
+    item.value === activeTab
+      ? "border-primary bg-primary text-primary-foreground hover:bg-primary/90"
+      : "border-border bg-background text-foreground hover:bg-accent hover:text-accent-foreground";
+
+  if (item.href) {
+    return (
+      <Button
+        asChild
+        className={`h-10 shrink-0 gap-2 rounded-full border px-4 ${className}`}
+        size="sm"
+        variant="ghost"
+      >
+        <Link href={item.href}>
+          <Icon className="h-4 w-4" />
+          <span>{item.label}</span>
+        </Link>
+      </Button>
+    );
+  }
+
+  return (
+    <Button
+      className={`h-10 shrink-0 gap-2 rounded-full border px-4 ${className}`}
+      onClick={() => onTabChange(item.value)}
+      size="sm"
+      variant="ghost"
+    >
+      <Icon className="h-4 w-4" />
+      <span>{item.label}</span>
+    </Button>
+  );
+}
+
+export function AdminSettingsNavigation({
+  activeTab,
+  onTabChange,
+}: {
+  activeTab: string;
+  onTabChange: (value: string) => void;
+}) {
+  const activeGroup = getActiveGroup(activeTab);
+  const activeItem = getActiveItem(activeTab);
+  const ActiveIcon = activeItem?.icon;
+
+  return (
+    <div className="space-y-4 rounded-2xl border bg-background px-5 py-4 shadow-sm">
+      <div className="flex flex-col gap-4 xl:flex-row xl:items-start xl:justify-between">
+        <div className="space-y-2">
           <div className="font-semibold text-muted-foreground text-xs uppercase tracking-[0.16em]">
             Admin Console
           </div>
-          <h1 className="font-semibold text-2xl tracking-tight">
-            系统设置中心
-          </h1>
+          <div className="flex flex-wrap items-center gap-3">
+            <h1 className="font-semibold text-2xl tracking-tight">
+              系统设置中心
+            </h1>
+            {activeGroup ? (
+              <SettingStatusBadge tone="enabled">{activeGroup.title}</SettingStatusBadge>
+            ) : null}
+          </div>
           <p className="max-w-4xl text-muted-foreground text-sm leading-6">
-            按后台人员的操作路径重新组织入口：先处理运营数据，再调整站点体验，最后管理模型与基础设施能力。
+            页面已改成横向工作区：顶部收拢分类入口，正文区域尽量留给配置表单和数据内容。
           </p>
         </div>
+        <Button asChild className="h-10 rounded-full px-4" size="sm" variant="outline">
+          <Link href="/">
+            <ArrowLeft className="h-4 w-4" />
+            返回工作台
+          </Link>
+        </Button>
       </div>
-      <div className="grid gap-px bg-border lg:grid-cols-3">
-        {ADMIN_SETTINGS_NAV_GROUPS.map((group) => {
-          const hasActiveTab = group.items.some(
-            (item) => item.value === activeTab
-          );
-          return (
-            <section className="bg-background p-4" key={group.title}>
-              <div className="mb-3 flex items-start justify-between gap-3">
-                <div className="space-y-1">
-                  <h2 className="font-semibold text-sm">{group.title}</h2>
-                  <p className="text-muted-foreground text-xs leading-5">
-                    {group.description}
-                  </p>
-                </div>
-                {hasActiveTab ? (
-                  <SettingStatusBadge tone="enabled">当前</SettingStatusBadge>
-                ) : null}
-              </div>
-              <TabsList className="grid h-auto w-full grid-cols-1 gap-1 bg-transparent p-0">
-                {group.items.map((item) => {
-                  const Icon = item.icon;
-                  const triggerClassName =
-                    "h-auto justify-start gap-2 rounded-md border border-transparent px-3 py-2 text-left data-[state=active]:border-border data-[state=active]:bg-muted/50";
-                  const content = (
-                    <>
-                      <Icon className="h-4 w-4 shrink-0 text-muted-foreground" />
-                      <span className="min-w-0">
-                        <span className="block truncate font-medium text-sm">
-                          {item.label}
-                        </span>
-                        <span className="block truncate font-normal text-[11px] text-muted-foreground">
-                          {item.description}
-                        </span>
-                      </span>
-                    </>
-                  );
 
-                  if (item.href) {
-                    return (
-                      <TabsTrigger
-                        asChild
-                        className={triggerClassName}
-                        key={item.value}
-                        value={item.value}
-                      >
-                        <Link href={item.href}>{content}</Link>
-                      </TabsTrigger>
-                    );
-                  }
+      <div className="rounded-2xl border bg-muted/20 p-2">
+        <div className="flex flex-col gap-3 md:hidden">
+          <Select onValueChange={onTabChange} value={activeTab}>
+            <SelectTrigger className="h-11 border-0 bg-background shadow-sm">
+              <SelectValue placeholder="选择设置项" />
+            </SelectTrigger>
+            <SelectContent>
+              {ADMIN_SETTINGS_NAV_GROUPS.map((group, groupIndex) => (
+                <SelectGroup key={group.title}>
+                  <SelectLabel>{group.title}</SelectLabel>
+                  {group.items
+                    .filter((item) => !item.href)
+                    .map((item) => (
+                      <SelectItem key={item.value} value={item.value}>
+                        {item.label}
+                      </SelectItem>
+                    ))}
+                  {groupIndex < ADMIN_SETTINGS_NAV_GROUPS.length - 1 ? (
+                    <SelectSeparator />
+                  ) : null}
+                </SelectGroup>
+              ))}
+            </SelectContent>
+          </Select>
 
-                  return (
-                    <TabsTrigger
-                      className={triggerClassName}
-                      key={item.value}
-                      value={item.value}
-                    >
-                      {content}
-                    </TabsTrigger>
-                  );
-                })}
-              </TabsList>
-            </section>
-          );
-        })}
+          <div className="flex flex-wrap gap-2">
+            {(activeGroup?.items ?? []).map((item) => (
+              <SettingsQuickAction
+                activeTab={activeTab}
+                item={item}
+                key={item.value}
+                onTabChange={onTabChange}
+              />
+            ))}
+          </div>
+        </div>
+
+        <div className="hidden items-center gap-2 md:flex">
+          {ADMIN_SETTINGS_NAV_GROUPS.map((group) => (
+            <SettingsGroupDropdown
+              activeTab={activeTab}
+              group={group}
+              key={group.title}
+              onTabChange={onTabChange}
+            />
+          ))}
+
+          <Separator className="mx-1 h-7" orientation="vertical" />
+
+          <div className="flex min-w-0 flex-1 items-center gap-2 overflow-x-auto pb-1">
+            {(activeGroup?.items ?? []).map((item) => (
+              <SettingsQuickAction
+                activeTab={activeTab}
+                item={item}
+                key={item.value}
+                onTabChange={onTabChange}
+              />
+            ))}
+          </div>
+        </div>
       </div>
+
+      {activeItem && ActiveIcon ? (
+        <div className="flex items-start gap-3 rounded-2xl border bg-muted/10 px-4 py-3">
+          <div className="flex h-11 w-11 shrink-0 items-center justify-center rounded-2xl bg-background shadow-sm">
+            <ActiveIcon className="h-5 w-5 text-muted-foreground" />
+          </div>
+          <div className="min-w-0 flex-1">
+            <div className="flex flex-wrap items-center gap-2">
+              <h2 className="font-semibold text-base">{activeItem.label}</h2>
+              {activeGroup ? (
+                <span className="text-muted-foreground text-xs">
+                  {activeGroup.title}
+                </span>
+              ) : null}
+            </div>
+            <p className="mt-1 text-muted-foreground text-sm">
+              {activeItem.description}
+            </p>
+          </div>
+        </div>
+      ) : null}
     </div>
   );
 }
diff --git a/app/(admin)/settings/admin-settings-client.tsx b/app/(admin)/settings/admin-settings-client.tsx
index 38a2e25ff..ec7e1762e 100644
--- a/app/(admin)/settings/admin-settings-client.tsx
+++ b/app/(admin)/settings/admin-settings-client.tsx
@@ -126,7 +126,7 @@ import {
 } from "@/components/ui/select";
 import { Separator } from "@/components/ui/separator";
 import { Switch } from "@/components/ui/switch";
-import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs";
+import { Tabs, TabsContent } from "@/components/ui/tabs";
 import { Textarea } from "@/components/ui/textarea";
 import {
   defaultAgentWorkflowUiConfig,
@@ -7996,9 +7996,12 @@ export function AdminSettingsClient() {
   }, [expandedLocalAiSections]);
 
   return (
-    <div className="container mx-auto p-6">
+    <div className="w-full px-4 py-6 sm:px-6 xl:px-8 2xl:px-10">
       <Tabs onValueChange={setActiveTab} value={activeTab}>
-        <AdminSettingsNavigation activeTab={activeTab} />
+        <AdminSettingsNavigation
+          activeTab={activeTab}
+          onTabChange={setActiveTab}
+        />
 
         {/* 用户管理 */}
         <TabsContent className="mt-6" value="users">