diff --git a/src/components/RouterViewPlaceholder.vue b/src/components/RouterViewPlaceholder.vue
new file mode 100644
index 0000000..f1d95e6
--- /dev/null
+++ b/src/components/RouterViewPlaceholder.vue
@@ -0,0 +1,7 @@
+<template>
+  <router-view></router-view>
+</template>
+
+<script setup lang="ts">
+// 这是一个占位组件，用于嵌套路由
+</script>
\ No newline at end of file
diff --git a/src/components/SidebarItem.vue b/src/components/SidebarItem.vue
index 0f623a2..69eb54d 100644
--- a/src/components/SidebarItem.vue
+++ b/src/components/SidebarItem.vue
@@ -3,7 +3,7 @@
     <!-- 有子路由 -->
     <el-sub-menu
       v-if="hasChildren(item)"
-      :index="item.path"
+      :index="getFullPath(item)"
     >
       <template #title>
         <el-icon v-if="item.meta?.icon">
@@ -12,7 +12,7 @@
         <span>{{ item.meta?.title }}</span>
       </template>
 
-      <SidebarItem :routes="item.children!" :parent-path="item.path" />
+      <SidebarItem :routes="item.children!" :parent-path="getFullPath(item)" />
     </el-sub-menu>
 
     <!-- 普通菜单 -->
@@ -38,7 +38,7 @@ interface Props {
 }
 
 const props = withDefaults(defineProps<Props>(), {
-  parentPath: ''
+  parentPath: '/dashboard'
 })
 
 const hasChildren = (route: RouteRecordRaw) =>
@@ -50,6 +50,7 @@ const getFullPath = (route: RouteRecordRaw) => {
     return route.path
   }
   // 否则拼接父级路径
-  return props.parentPath ? `/${props.parentPath}/${route.path}` : `/${route.path}`
+  const basePath = props.parentPath || ''
+  return basePath ? `${basePath}/${route.path}` : `/${route.path}`
 }
 </script>
diff --git a/src/layouts/DefaultLayout.vue b/src/layouts/DefaultLayout.vue
index 4837518..320bdc2 100644
--- a/src/layouts/DefaultLayout.vue
+++ b/src/layouts/DefaultLayout.vue
@@ -95,9 +95,9 @@ const activeMenu = computed(() => route.path)
  * 获取菜单路由，直接使用配置的路由结构
  */
 const menuRoutes = computed(() => {
-  // 直接返回路由配置中的子路由
-  const mainRoute = router.options.routes.find(r => r.path === '/')
-  return mainRoute?.children || []
+  // 查找 /dashboard 路由的子路由
+  const dashboardRoute = router.options.routes.find(r => r.path === '/dashboard')
+  return dashboardRoute?.children || []
 })
 </script>
 
diff --git a/src/router/index.ts b/src/router/index.ts
index fd45c33..b60a1eb 100644
--- a/src/router/index.ts
+++ b/src/router/index.ts
@@ -29,6 +29,7 @@ const routes = [
       },
       {
         path: 'system',
+        component: () => import('@/components/RouterViewPlaceholder.vue'),
         meta: { title: '系统管理', icon: 'Setting' },
         children: [
           {
diff --git a/src/views/login/index.vue b/src/views/login/index.vue
index 082733f..8f52ba0 100644
--- a/src/views/login/index.vue
+++ b/src/views/login/index.vue
@@ -101,7 +101,7 @@ const handleLogin = async () => {
       await userStore.fetchUserInfo()
 
       ElMessage.success('登录成功')
-      router.push({ path: '/' })
+      router.push({ path: '/dashboard' })
     } catch (error: any) {
       ElMessage.error(error.message || '登录失败，请重试')
     } finally {