diff --git a/frontend/src/components/AdminLayout.tsx b/frontend/src/components/AdminLayout.tsx
index 59366ad..8b6f70f 100644
--- a/frontend/src/components/AdminLayout.tsx
+++ b/frontend/src/components/AdminLayout.tsx
@@ -28,8 +28,13 @@ const AdminLayout = () => {
   const { message } = App.useApp();
   const { themeMode, toggleTheme } = useThemeStore();
 
+  // 跟踪用户是否手动修改过 openKeys
+  const [userInteracted, setUserInteracted] = useState(false);
+  // 用户手动设置的 openKeys
+  const [userOpenKeys, setUserOpenKeys] = useState<string[]>([]);
+
   // 根据当前路径计算应该展开的菜单
-  const openKeys = useMemo(() => {
+  const defaultOpenKeys = useMemo(() => {
     const path = location.pathname;
     if (path.startsWith('/admin/users')) {
       return ['user'];
@@ -37,6 +42,17 @@ const AdminLayout = () => {
     return [];
   }, [location.pathname]);
 
+  // 最终使用的 openKeys：如果用户手动修改过，使用用户的设置；否则使用默认值
+  const openKeys = useMemo(() => {
+    return userInteracted ? userOpenKeys : defaultOpenKeys;
+  }, [userInteracted, userOpenKeys, defaultOpenKeys]);
+
+  // 处理菜单展开/收起
+  const handleOpenChange = (keys: string[]) => {
+    setUserInteracted(true);
+    setUserOpenKeys(keys);
+  };
+
   const handleLogout = async () => {
     try {
       await adminAuthService.logout();
@@ -97,6 +113,7 @@ const AdminLayout = () => {
           mode="inline"
           selectedKeys={[location.pathname]}
           openKeys={openKeys}
+          onOpenChange={handleOpenChange}
           items={menuItems}
           onClick={({ key }) => navigate(key)}
         />
diff --git a/frontend/src/theme/index.ts b/frontend/src/theme/index.ts
index 64cc9fb..0c37a03 100644
--- a/frontend/src/theme/index.ts
+++ b/frontend/src/theme/index.ts
@@ -82,4 +82,4 @@ export const getThemeByMode = (mode: ThemeMode): ThemeConfig => {
 };
 
 // 默认主题配置（向后兼容）
-export const appTheme: ThemeConfig = darkTheme;
+export const appTheme: ThemeConfig = lightTheme;