diff --git a/frontend/src/router/index.ts b/frontend/src/router/index.ts
index 0dfefb8..33fca33 100644
--- a/frontend/src/router/index.ts
+++ b/frontend/src/router/index.ts
@@ -1,5 +1,9 @@
 import { createRouter, createWebHistory, type RouteRecordRaw } from 'vue-router'
 
+// 部署在/admin/子路径下时，base必须是/admin/
+// 本地开发(npm run dev)时base是/
+const routerBase = import.meta.env.BASE_URL
+
 // 管理后台Layout
 const AdminLayout = () => import('@/layouts/AdminLayout.vue')
 // 大屏Layout
@@ -92,7 +96,7 @@ function generateMockRoutes(routes: RouteRecordRaw[]): RouteRecordRaw[] {
 }
 
 const router = createRouter({
-  history: createWebHistory(),
+  history: createWebHistory(routerBase),
   routes: [...normalRoutes, ...generateMockRoutes(normalRoutes)],
 })
 
diff --git a/frontend/src/utils/request.ts b/frontend/src/utils/request.ts
index c957fec..bf765a2 100644
--- a/frontend/src/utils/request.ts
+++ b/frontend/src/utils/request.ts
@@ -3,6 +3,9 @@ import { ElMessage } from 'element-plus'
 import router from '@/router'
 import type { ApiResponse } from '@/types'
 
+// 部署base路径，用于token过期时跳转登录页
+const routerBase = import.meta.env.BASE_URL
+
 // 创建axios实例
 const service = axios.create({
   timeout: 30000,
@@ -36,8 +39,8 @@ service.interceptors.response.use(
     // Token无效/过期
     if (res.code === 40101) {
       localStorage.removeItem('token')
-      const isMock = window.location.pathname.startsWith('/mock')
-      router.push(isMock ? '/mock/login' : '/login')
+      const loginPath = routerBase + 'login'
+      router.push(loginPath)
       ElMessage.warning('登录已过期')
       return Promise.reject(new Error(res.message))
     }
@@ -48,10 +51,15 @@ service.interceptors.response.use(
     return Promise.reject(new Error(msg))
   },
   (error) => {
+    // HTTP 错误（4xx/5xx）：尝试解析后端返回的错误信息
     if (error.response) {
-      ElMessage.error('网络异常')
+      const data = error.response.data as ApiResponse | undefined
+      const msg = data?.message || `请求失败 (${error.response.status})`
+      ElMessage.error(msg)
     } else if (error.code === 'ECONNABORTED') {
       ElMessage.error('请求超时')
+    } else {
+      ElMessage.error('网络异常，请检查网络连接')
     }
     return Promise.reject(error)
   }
diff --git a/frontend/vite.config.ts b/frontend/vite.config.ts
index 3c075f1..73b3d9d 100644
--- a/frontend/vite.config.ts
+++ b/frontend/vite.config.ts
@@ -4,9 +4,9 @@ import { viteMockPlugin } from './mock/plugin'
 import path from 'path'
 
 // https://vite.dev/config/
-export default defineConfig({
-  // 部署到 /admin/ 子路径，静态资源路径前缀
-  base: '/admin/',
+export default defineConfig(({ command }) => ({
+  // build时部署到/admin/子路径，dev时用根路径
+  base: command === 'build' ? '/admin/' : '/',
   plugins: [
     vue(),
     viteMockPlugin({
@@ -35,4 +35,4 @@ export default defineConfig({
       }
     }
   },
-})
+}))