diff --git a/static/admin/app.js b/static/admin/app.js
index 4ee043d..befc2c9 100644
--- a/static/admin/app.js
+++ b/static/admin/app.js
@@ -34,6 +34,15 @@ document.addEventListener('DOMContentLoaded', () => {
         });
     });
 
+    document.querySelectorAll('.menu-group-header').forEach(button => {
+        button.addEventListener('click', () => {
+            const group = button.closest('.menu-group');
+            if (group) {
+                group.classList.toggle('collapsed');
+            }
+        });
+    });
+
     // 登录表单
     document.getElementById('login-form').addEventListener('submit', handleLogin);
     
diff --git a/static/admin/index.html b/static/admin/index.html
index 5631b1a..7943b42 100644
--- a/static/admin/index.html
+++ b/static/admin/index.html
@@ -16,15 +16,27 @@
             </div>
             <nav class="menu">
                 <a href="#dashboard" class="menu-item active" data-page="dashboard">仪表盘</a>
-                <a href="#posts" class="menu-item" data-page="posts">文章管理</a>
-                <a href="#categories" class="menu-item" data-page="categories">分类管理</a>
-                <a href="#tags" class="menu-item" data-page="tags">标签管理</a>
-                <a href="#pages" class="menu-item" data-page="pages">页面管理</a>
-                <a href="#comments" class="menu-item" data-page="comments">评论管理</a>
-                <a href="#users" class="menu-item" data-page="users">用户管理</a>
-                <a href="#files" class="menu-item" data-page="files">文件管理</a>
-                <a href="#themes" class="menu-item" data-page="themes">主题管理</a>
-                <a href="#settings" class="menu-item" data-page="settings">基础设置</a>
+
+                <div class="menu-group open">
+                    <button class="menu-group-header" type="button">内容管理</button>
+                    <div class="menu-sub">
+                        <a href="#posts" class="menu-item" data-page="posts">文章管理</a>
+                        <a href="#categories" class="menu-item" data-page="categories">分类管理</a>
+                        <a href="#tags" class="menu-item" data-page="tags">标签管理</a>
+                        <a href="#pages" class="menu-item" data-page="pages">页面管理</a>
+                        <a href="#comments" class="menu-item" data-page="comments">评论管理</a>
+                    </div>
+                </div>
+
+                <div class="menu-group open">
+                    <button class="menu-group-header" type="button">系统管理</button>
+                    <div class="menu-sub">
+                        <a href="#users" class="menu-item" data-page="users">用户管理</a>
+                        <a href="#files" class="menu-item" data-page="files">文件管理</a>
+                        <a href="#themes" class="menu-item" data-page="themes">主题管理</a>
+                        <a href="#settings" class="menu-item" data-page="settings">基础设置</a>
+                    </div>
+                </div>
             </nav>
             <div class="user-info">
                 <span id="username">Admin</span>
diff --git a/static/admin/style.css b/static/admin/style.css
index 2e278ea..3f9e8b0 100644
--- a/static/admin/style.css
+++ b/static/admin/style.css
@@ -43,12 +43,52 @@ body {
     padding: 10px 0;
 }
 
+.menu-group {
+    margin: 4px 12px 8px;
+    border-radius: 6px;
+    overflow: hidden;
+    background: rgba(255,255,255,0.04);
+}
+
+.menu-group-header {
+    width: 100%;
+    border: none;
+    background: transparent;
+    color: #fff;
+    text-align: left;
+    padding: 12px 16px;
+    font-size: 13px;
+    font-weight: 600;
+    cursor: pointer;
+    letter-spacing: 0.5px;
+}
+
+.menu-group-header::after {
+    content: '▾';
+    float: right;
+    color: rgba(255,255,255,0.6);
+}
+
+.menu-group.collapsed .menu-group-header::after {
+    content: '▸';
+}
+
+.menu-sub {
+    display: block;
+    padding-bottom: 4px;
+}
+
+.menu-group.collapsed .menu-sub {
+    display: none;
+}
+
 .menu-item {
     display: block;
-    padding: 12px 20px;
-    color: rgba(255,255,255,0.7);
+    padding: 10px 20px 10px 32px;
+    color: rgba(255,255,255,0.75);
     text-decoration: none;
     transition: all 0.3s;
+    font-size: 14px;
 }
 
 .menu-item:hover,