diff --git a/README.md b/README.md
index b5c3d38..2cf139c 100644
--- a/README.md
+++ b/README.md
@@ -37,7 +37,7 @@ npm run dev
 - 站内信已支持订单关键节点自动写入，可通过 `GET /api/notifications` 查看。
 - 申诉仲裁已支持订单双方发起申诉、开发态后台处理，后台页面为 `http://localhost:5173/admin/disputes`。
 - 系统配置已支持默认配置初始化和后台编辑，页面为 `http://localhost:5173/admin/system-configs`，更新会写入审计日志。
-- 后台已使用独立登录，页面为 `http://localhost:5173/admin/login`；开发态默认管理员为 `admin / admin123456`。
+- 后台已使用独立登录和独立管理 UI，页面为 `http://localhost:5173/admin/login`；开发态默认管理员为 `admin / admin123456`。
 - 后台仪表盘已接入真实统计数据，页面为 `http://localhost:5173/admin/dashboard`。
 - 商品审核后台已接入，页面为 `http://localhost:5173/admin/listings/review`。
 
diff --git a/docs/business-rules.md b/docs/business-rules.md
index d353188..a25a4b9 100644
--- a/docs/business-rules.md
+++ b/docs/business-rules.md
@@ -98,6 +98,7 @@
 ## 开发态后台登录
 
 - 后台登录接口为 `/api/admin/auth/login`，前端页面为 `/admin/login`。
+- 后台页面使用独立管理布局，不再混用用户端侧边栏。
 - 后台 JWT 与普通用户 JWT 区分 `admin` 和 `user`，普通用户 Token 不能访问 `/api/admin/*`。
 - 开发态首次后台登录会自动初始化默认管理员：用户名 `admin`，密码 `admin123456`。
 - 默认管理员只用于本地开发；正式部署前必须改为初始化脚本、强密码和管理员密码修改流程。
diff --git a/frontend/src/App.vue b/frontend/src/App.vue
index c51a1ce..098c538 100644
--- a/frontend/src/App.vue
+++ b/frontend/src/App.vue
@@ -1,11 +1,21 @@
 <script setup lang="ts">
 import { RouterView } from 'vue-router'
+import { computed } from 'vue'
+import { useRoute } from 'vue-router'
 
+import AdminLayout from './layouts/AdminLayout.vue'
 import AppLayout from './layouts/AppLayout.vue'
+
+const route = useRoute()
+const layout = computed(() => route.meta.layout || 'app')
 </script>
 
 <template>
-  <AppLayout>
+  <AdminLayout v-if="layout === 'admin'">
+    <RouterView />
+  </AdminLayout>
+  <RouterView v-else-if="layout === 'blank'" />
+  <AppLayout v-else>
     <RouterView />
   </AppLayout>
 </template>
diff --git a/frontend/src/layouts/AdminLayout.vue b/frontend/src/layouts/AdminLayout.vue
new file mode 100644
index 0000000..aa7d1fa
--- /dev/null
+++ b/frontend/src/layouts/AdminLayout.vue
@@ -0,0 +1,63 @@
+<script setup lang="ts">
+import { DataLine, DocumentChecked, Operation, ScaleToOriginal, SwitchButton } from '@element-plus/icons-vue'
+import { ElMessage } from 'element-plus'
+import { computed } from 'vue'
+import { useRouter } from 'vue-router'
+
+import { logoutAdmin } from '@/api/adminAuth'
+import { useAdminSessionStore } from '@/stores/adminSession'
+
+const router = useRouter()
+const adminSession = useAdminSessionStore()
+
+const navItems = [
+  { label: '仪表盘', to: '/admin/dashboard', icon: DataLine },
+  { label: '商品审核', to: '/admin/listings/review', icon: DocumentChecked },
+  { label: '仲裁中心', to: '/admin/disputes', icon: ScaleToOriginal },
+  { label: '系统配置', to: '/admin/system-configs', icon: Operation },
+]
+
+const adminName = computed(() => adminSession.nickname || adminSession.username || '管理员')
+
+async function handleLogout() {
+  try {
+    await logoutAdmin()
+  } catch {
+    // Local logout should still happen if the development API is unavailable.
+  }
+  adminSession.logout()
+  ElMessage.success('已退出后台')
+  await router.push('/admin/login')
+}
+</script>
+
+<template>
+  <div class="admin-shell">
+    <aside class="admin-sidebar">
+      <RouterLink class="admin-brand" to="/admin/dashboard">
+        <span class="brand-mark">H</span>
+        <span>哈夫币后台</span>
+      </RouterLink>
+
+      <nav class="admin-nav">
+        <RouterLink v-for="item in navItems" :key="item.to" class="admin-nav-link" :to="item.to">
+          <el-icon><component :is="item.icon" /></el-icon>
+          <span>{{ item.label }}</span>
+        </RouterLink>
+      </nav>
+    </aside>
+
+    <section class="admin-workspace">
+      <header class="admin-topbar">
+        <div>
+          <span>管理系统</span>
+          <strong>{{ adminName }}</strong>
+        </div>
+        <el-button :icon="SwitchButton" @click="handleLogout">退出</el-button>
+      </header>
+      <main class="admin-main">
+        <slot />
+      </main>
+    </section>
+  </div>
+</template>
diff --git a/frontend/src/layouts/AppLayout.vue b/frontend/src/layouts/AppLayout.vue
index fe40ecc..6e416a2 100644
--- a/frontend/src/layouts/AppLayout.vue
+++ b/frontend/src/layouts/AppLayout.vue
@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { Bell, House, Key, Operation, Phone, ScaleToOriginal, Shop, Tickets, UserFilled, Wallet, View } from '@element-plus/icons-vue'
+import { Bell, House, Key, Phone, Shop, Tickets, UserFilled, Wallet } from '@element-plus/icons-vue'
 
 const navItems = [
   { label: '首页', to: '/', icon: House },
@@ -8,10 +8,7 @@ const navItems = [
   { label: '钱包', to: '/wallet', icon: Wallet },
   { label: '通知', to: '/notifications', icon: Bell },
   { label: '实名', to: '/realname', icon: UserFilled },
-  { label: '后台登录', to: '/admin/login', icon: Key },
-  { label: '审核', to: '/admin/listings/review', icon: View },
-  { label: '仲裁', to: '/admin/disputes', icon: ScaleToOriginal },
-  { label: '配置', to: '/admin/system-configs', icon: Operation },
+  { label: '后台', to: '/admin/login', icon: Key },
   { label: '登录', to: '/login', icon: Phone },
 ]
 </script>
diff --git a/frontend/src/router/index.ts b/frontend/src/router/index.ts
index a56d313..dc5690b 100644
--- a/frontend/src/router/index.ts
+++ b/frontend/src/router/index.ts
@@ -3,6 +3,7 @@ import { createRouter, createWebHistory } from 'vue-router'
 const router = createRouter({
   history: createWebHistory(),
   routes: [
+    { path: '/admin', redirect: '/admin/dashboard' },
     { path: '/', name: 'home', component: () => import('@/views/public/HomeView.vue') },
     { path: '/login', name: 'login', component: () => import('@/views/account/LoginView.vue') },
     { path: '/listings', name: 'listings', component: () => import('@/views/public/ListingsView.vue') },
@@ -17,16 +18,39 @@ const router = createRouter({
     { path: '/seller/listings/create', name: 'seller-listing-create', component: () => import('@/views/seller/SellerListingCreateView.vue') },
     { path: '/seller/handoffs', name: 'seller-handoffs', component: () => import('@/views/seller/SellerHandoffsView.vue') },
     { path: '/seller/earnings', name: 'seller-earnings', component: () => import('@/views/seller/SellerEarningsView.vue') },
-    { path: '/admin/login', name: 'admin-login', component: () => import('@/views/admin/AdminLoginView.vue') },
-    { path: '/admin/dashboard', name: 'admin-dashboard', component: () => import('@/views/admin/AdminDashboardView.vue') },
-    { path: '/admin/listings/review', name: 'admin-listing-review', component: () => import('@/views/admin/AdminListingReviewView.vue') },
-    { path: '/admin/disputes', name: 'admin-disputes', component: () => import('@/views/admin/AdminDisputesView.vue') },
-    { path: '/admin/system-configs', name: 'admin-system-configs', component: () => import('@/views/admin/AdminSystemConfigsView.vue') },
+    { path: '/admin/login', name: 'admin-login', component: () => import('@/views/admin/AdminLoginView.vue'), meta: { layout: 'blank' } },
+    {
+      path: '/admin/dashboard',
+      name: 'admin-dashboard',
+      component: () => import('@/views/admin/AdminDashboardView.vue'),
+      meta: { layout: 'admin', requiresAdmin: true },
+    },
+    {
+      path: '/admin/listings/review',
+      name: 'admin-listing-review',
+      component: () => import('@/views/admin/AdminListingReviewView.vue'),
+      meta: { layout: 'admin', requiresAdmin: true },
+    },
+    {
+      path: '/admin/disputes',
+      name: 'admin-disputes',
+      component: () => import('@/views/admin/AdminDisputesView.vue'),
+      meta: { layout: 'admin', requiresAdmin: true },
+    },
+    {
+      path: '/admin/system-configs',
+      name: 'admin-system-configs',
+      component: () => import('@/views/admin/AdminSystemConfigsView.vue'),
+      meta: { layout: 'admin', requiresAdmin: true },
+    },
   ],
 })
 
 router.beforeEach((to) => {
-  if (to.path.startsWith('/admin') && to.path !== '/admin/login') {
+  if (to.path === '/admin/login' && localStorage.getItem('admin_access_token')) {
+    return '/admin/dashboard'
+  }
+  if (to.meta.requiresAdmin) {
     const token = localStorage.getItem('admin_access_token')
     if (!token) {
       return '/admin/login'
diff --git a/frontend/src/styles/base.css b/frontend/src/styles/base.css
index ad6a1b9..a888fbc 100644
--- a/frontend/src/styles/base.css
+++ b/frontend/src/styles/base.css
@@ -81,6 +81,124 @@ a {
   padding: 32px;
 }
 
+.admin-shell {
+  display: grid;
+  min-height: 100vh;
+  grid-template-columns: 260px 1fr;
+  background: #f5f7fb;
+}
+
+.admin-sidebar {
+  display: flex;
+  flex-direction: column;
+  border-right: 1px solid #dfe5ec;
+  background: #111827;
+  padding: 20px 16px;
+  color: #dbe4ee;
+}
+
+.admin-brand {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  min-height: 44px;
+  color: #ffffff;
+  font-weight: 700;
+}
+
+.admin-nav {
+  display: grid;
+  gap: 6px;
+  margin-top: 28px;
+}
+
+.admin-nav-link {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  min-height: 42px;
+  border-radius: 8px;
+  padding: 0 12px;
+  color: #b7c3d2;
+}
+
+.admin-nav-link.router-link-active {
+  background: #0f766e;
+  color: #ffffff;
+  font-weight: 600;
+}
+
+.admin-workspace {
+  min-width: 0;
+}
+
+.admin-topbar {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  min-height: 64px;
+  border-bottom: 1px solid #e4e7ed;
+  background: #ffffff;
+  padding: 0 28px;
+}
+
+.admin-topbar span {
+  display: block;
+  color: #6b7785;
+  font-size: 12px;
+}
+
+.admin-topbar strong {
+  display: block;
+  margin-top: 3px;
+  color: #111827;
+}
+
+.admin-main {
+  min-width: 0;
+  padding: 28px;
+}
+
+.admin-login-shell {
+  display: grid;
+  min-height: 100vh;
+  place-items: center;
+  background:
+    linear-gradient(135deg, rgba(15, 118, 110, 0.12), rgba(17, 24, 39, 0.08)),
+    #f5f7fb;
+  padding: 24px;
+}
+
+.admin-login-panel {
+  width: min(420px, 100%);
+  border: 1px solid #e4e7ed;
+  border-radius: 8px;
+  background: #ffffff;
+  padding: 28px;
+  box-shadow: 0 20px 60px rgba(17, 24, 39, 0.10);
+}
+
+.admin-login-brand {
+  display: inline-flex;
+  align-items: center;
+  gap: 10px;
+  color: #111827;
+  font-weight: 700;
+}
+
+.admin-login-header {
+  margin: 28px 0 22px;
+}
+
+.admin-login-header h1 {
+  font-size: 30px;
+}
+
+.admin-login-header p:last-child {
+  margin: 10px 0 0;
+  color: #52616f;
+}
+
 .page {
   max-width: 1120px;
 }
@@ -407,6 +525,10 @@ h1 {
     grid-template-columns: 1fr;
   }
 
+  .admin-shell {
+    grid-template-columns: 1fr;
+  }
+
   .sidebar {
     position: sticky;
     top: 0;
@@ -421,10 +543,32 @@ h1 {
     overflow-x: auto;
   }
 
+  .admin-sidebar {
+    position: sticky;
+    top: 0;
+    z-index: 10;
+    border-right: 0;
+    border-bottom: 1px solid #1f2937;
+  }
+
+  .admin-nav {
+    grid-auto-flow: column;
+    grid-auto-columns: max-content;
+    overflow-x: auto;
+  }
+
+  .admin-topbar {
+    padding: 0 16px;
+  }
+
   .main {
     padding: 24px 16px;
   }
 
+  .admin-main {
+    padding: 24px 16px;
+  }
+
   .metric-grid {
     grid-template-columns: 1fr;
   }
diff --git a/frontend/src/views/admin/AdminLoginView.vue b/frontend/src/views/admin/AdminLoginView.vue
index bd2a036..8fdf41c 100644
--- a/frontend/src/views/admin/AdminLoginView.vue
+++ b/frontend/src/views/admin/AdminLoginView.vue
@@ -36,21 +36,28 @@ function readError(error: unknown, fallback: string) {
 </script>
 
 <template>
-  <section class="page">
-    <div class="page-header">
-      <p class="eyebrow">Admin Login</p>
-      <h1>后台登录</h1>
-      <p>开发态首次登录会初始化默认管理员，后续可接入角色权限和密码修改。</p>
-    </div>
+  <section class="admin-login-shell">
+    <div class="admin-login-panel">
+      <RouterLink class="admin-login-brand" to="/">
+        <span class="brand-mark">H</span>
+        <span>哈夫币后台</span>
+      </RouterLink>
 
-    <el-form class="login-form" label-position="top">
-      <el-form-item label="用户名">
-        <el-input v-model="form.username" placeholder="请输入管理员用户名" />
-      </el-form-item>
-      <el-form-item label="密码">
-        <el-input v-model="form.password" type="password" show-password placeholder="请输入管理员密码" />
-      </el-form-item>
-      <el-button type="primary" :loading="loading" @click="handleLogin">登录后台</el-button>
-    </el-form>
+      <div class="admin-login-header">
+        <p class="eyebrow">Admin Login</p>
+        <h1>后台登录</h1>
+        <p>管理员登录后进入后台管理系统。</p>
+      </div>
+
+      <el-form label-position="top">
+        <el-form-item label="用户名">
+          <el-input v-model="form.username" placeholder="请输入管理员用户名" />
+        </el-form-item>
+        <el-form-item label="密码">
+          <el-input v-model="form.password" type="password" show-password placeholder="请输入管理员密码" @keyup.enter="handleLogin" />
+        </el-form-item>
+        <el-button class="full-control" type="primary" :loading="loading" @click="handleLogin">登录后台</el-button>
+      </el-form>
+    </div>
   </section>
 </template>