diff --git a/web/eslint.config.js b/web/eslint.config.js
index 0d2d561..5d1addf 100644
--- a/web/eslint.config.js
+++ b/web/eslint.config.js
@@ -52,6 +52,7 @@ export default [
       "vue/multiline-html-element-content-newline": "off",
       "vue/html-indent": ["error", 2],
       "vue/script-indent": ["error", 2],
+      "vue/component-tags-order": ["error", { order: ["script", "template", "style"] }],
 
       // Vue 3 Composition API 规则
       "vue/no-setup-props-destructure": "error",
diff --git a/web/src/App.vue b/web/src/App.vue
index e5b936c..fd635fa 100644
--- a/web/src/App.vue
+++ b/web/src/App.vue
@@ -1,12 +1,18 @@
 <script setup lang="ts">
 import Layout from "@/components/Layout.vue";
+import { useAuthKey } from "@/services/auth";
 import { NDialogProvider, NMessageProvider } from "naive-ui";
+import { computed } from "vue";
+
+const authKey = useAuthKey();
+const isLoggedIn = computed(() => !!authKey.value);
 </script>
 
 <template>
   <n-message-provider>
     <n-dialog-provider>
-      <layout />
+      <layout v-if="isLoggedIn" />
+      <router-view v-else />
     </n-dialog-provider>
   </n-message-provider>
 </template>
diff --git a/web/src/style.css b/web/src/assets/style.css
similarity index 86%
rename from web/src/style.css
rename to web/src/assets/style.css
index c038d7e..e6b05cf 100644
--- a/web/src/style.css
+++ b/web/src/assets/style.css
@@ -9,20 +9,17 @@
   -moz-osx-font-smoothing: grayscale;
 }
 
-body {
-  margin: 0;
-  display: flex;
-  place-items: center;
-  min-width: 320px;
-  min-height: 100vh;
+html, body {
+  height: 100%;
 }
 
 #app {
   max-width: 1280px;
   width: 100%;
+  padding: 20px;
   margin: 0 auto;
-  padding: 2rem;
-  min-height: 100vh;
+  height: 100%;
+  box-sizing: border-box;
 }
 
 .flex {
diff --git a/web/src/components/Layout.vue b/web/src/components/Layout.vue
index f92d791..78cce92 100644
--- a/web/src/components/Layout.vue
+++ b/web/src/components/Layout.vue
@@ -1,5 +1,10 @@
+<script setup lang="ts">
+import Logout from "@/components/Logout.vue";
+import NavBar from "@/components/NavBar.vue";
+</script>
+
 <template>
-  <n-layout v-if="authService.isLoggedIn()">
+  <n-layout>
     <n-layout-header class="flex items-center">
       <h1 class="layout-header-title">T.COM</h1>
       <nav-bar />
@@ -9,15 +14,8 @@
       <router-view />
     </n-layout-content>
   </n-layout>
-  <router-view v-else />
 </template>
 
-<script setup lang="ts">
-import NavBar from "@/components/NavBar.vue";
-import Logout from "@/components/Logout.vue";
-import { authService } from "@/services/auth";
-</script>
-
 <style scoped>
 .layout-header-title {
   margin-top: 0;
diff --git a/web/src/components/Logout.vue b/web/src/components/Logout.vue
index ab1d992..d5bf1a1 100644
--- a/web/src/components/Logout.vue
+++ b/web/src/components/Logout.vue
@@ -1,15 +1,16 @@
-<template>
-  <n-button quaternary round @click="handleLogout">退出</n-button>
-</template>
-
 <script setup lang="ts">
-import { authService } from "@/services/auth";
+import { useAuthService } from "@/services/auth";
 import { useRouter } from "vue-router";
 
 const router = useRouter();
+const { logout } = useAuthService();
 
 const handleLogout = () => {
-  authService.logout();
-  router.push("/login");
+  logout();
+  router.replace("/login");
 };
 </script>
+
+<template>
+  <n-button quaternary round @click="handleLogout">退出</n-button>
+</template>
diff --git a/web/src/components/NavBar.vue b/web/src/components/NavBar.vue
index 0390f19..a653238 100644
--- a/web/src/components/NavBar.vue
+++ b/web/src/components/NavBar.vue
@@ -1,10 +1,6 @@
-<template>
-  <n-menu mode="horizontal" :options="menuOptions" :value="activeMenu" responsive />
-</template>
-
 <script setup lang="ts">
 import type { MenuOption } from "naive-ui";
-import { h, computed } from "vue";
+import { computed, h } from "vue";
 import { RouterLink, useRoute } from "vue-router";
 
 const menuOptions: MenuOption[] = [
@@ -33,3 +29,7 @@ function renderMenuItem(key: string, label: string): MenuOption {
   };
 }
 </script>
+
+<template>
+  <n-menu mode="horizontal" :options="menuOptions" :value="activeMenu" responsive />
+</template>
diff --git a/web/src/main.ts b/web/src/main.ts
index 8aacc86..9a8d434 100644
--- a/web/src/main.ts
+++ b/web/src/main.ts
@@ -2,6 +2,6 @@ import App from "@/App.vue";
 import router from "@/router";
 import naive from "naive-ui";
 import { createApp } from "vue";
-import "./style.css";
+import "./assets/style.css";
 
 createApp(App).use(router).use(naive).mount("#app");
diff --git a/web/src/router/index.ts b/web/src/router/index.ts
index 9988010..1dbd9eb 100644
--- a/web/src/router/index.ts
+++ b/web/src/router/index.ts
@@ -1,4 +1,4 @@
-import { authService } from "@/services/auth";
+import { useAuthService } from "@/services/auth";
 import { createRouter, createWebHistory, type RouteRecordRaw } from "vue-router";
 
 const routes: Array<RouteRecordRaw> = [
@@ -34,8 +34,10 @@ const router = createRouter({
   routes,
 });
 
+const { checkLogin } = useAuthService();
+
 router.beforeEach((to, _from, next) => {
-  const loggedIn = authService.isLoggedIn();
+  const loggedIn = checkLogin();
   if (to.path !== "/login" && !loggedIn) {
     return next({ path: "/login" });
   }
diff --git a/web/src/services/auth.ts b/web/src/services/auth.ts
index 08724b2..56ae039 100644
--- a/web/src/services/auth.ts
+++ b/web/src/services/auth.ts
@@ -1,33 +1,47 @@
 import http from "@/utils/http";
+import { useState } from "@/utils/state";
 
 const AUTH_KEY = "authKey";
 
-const login = async (authKey: string): Promise<boolean> => {
-  try {
-    await http.post("/auth/login", { auth_key: authKey });
-    localStorage.setItem(AUTH_KEY, authKey);
-    return true;
-  } catch (error) {
-    console.error("Login failed:", error);
-    return false;
-  }
+export const useAuthKey = () => {
+  return useState<string | null>(AUTH_KEY, () => null);
 };
 
-const logout = (): void => {
-  localStorage.removeItem(AUTH_KEY);
-};
+export function useAuthService() {
+  const authKey = useAuthKey();
 
-const getAuthKey = (): string | null => {
-  return localStorage.getItem(AUTH_KEY);
-};
+  const login = async (key: string): Promise<boolean> => {
+    try {
+      await http.post("/auth/login", { auth_key: key });
+      localStorage.setItem(AUTH_KEY, key);
+      authKey.value = key;
+      return true;
+    } catch (error) {
+      console.error("Login failed:", error);
+      return false;
+    }
+  };
 
-const isLoggedIn = (): boolean => {
-  return !!localStorage.getItem(AUTH_KEY);
-};
+  const logout = (): void => {
+    localStorage.removeItem(AUTH_KEY);
+    authKey.value = null;
+  };
 
-export const authService = {
-  login,
-  logout,
-  getAuthKey,
-  isLoggedIn,
-};
+  const checkLogin = (): boolean => {
+    if (authKey.value) {
+      return true;
+    }
+
+    const key = localStorage.getItem(AUTH_KEY);
+    if (key) {
+      authKey.value = key;
+    }
+    return !!authKey.value;
+  };
+
+  return {
+    login,
+    logout,
+    checkLogin,
+  };
+}
diff --git a/web/src/utils/http.ts b/web/src/utils/http.ts
index 9e73f9a..bc2760e 100644
--- a/web/src/utils/http.ts
+++ b/web/src/utils/http.ts
@@ -1,6 +1,5 @@
-import { authService } from "@/services/auth";
+import { useAuthService } from "@/services/auth";
 import axios from "axios";
-import { useRouter } from "vue-router";
 
 const http = axios.create({
   baseURL: "/api",
@@ -10,7 +9,7 @@ const http = axios.create({
 
 // 请求拦截器
 http.interceptors.request.use(config => {
-  const authKey = authService.getAuthKey();
+  const authKey = localStorage.getItem("authKey");
   if (authKey) {
     config.headers.Authorization = `Bearer ${authKey}`;
   }
@@ -22,8 +21,9 @@ http.interceptors.response.use(
   response => response.data,
   error => {
     if (error.response && error.response.status === 401) {
-      authService.logout();
-      useRouter().push("/login");
+      const { logout } = useAuthService();
+      logout();
+      window.location.href = "/login";
     }
     console.error("API Error:", error);
     return Promise.reject(error);
diff --git a/web/src/views/Dashboard.vue b/web/src/views/Dashboard.vue
index 814677e..3ca9e95 100644
--- a/web/src/views/Dashboard.vue
+++ b/web/src/views/Dashboard.vue
@@ -1,13 +1,13 @@
-<template>
-  <base-info-card />
-  <line-chart class="chart" />
-</template>
-
 <script setup lang="ts">
 import BaseInfoCard from "@/components/BaseInfoCard.vue";
 import LineChart from "@/components/LineChart.vue";
 </script>
 
+<template>
+  <base-info-card />
+  <line-chart class="chart" />
+</template>
+
 <style scoped>
 .chart {
   margin-top: 20px;
diff --git a/web/src/views/Login.vue b/web/src/views/Login.vue
index 9606bbc..eb17977 100644
--- a/web/src/views/Login.vue
+++ b/web/src/views/Login.vue
@@ -1,21 +1,5 @@
-<template>
-  <div class="login-container">
-    <n-card class="login-card" title="Login">
-      <n-space vertical>
-        <n-input
-          v-model:value="authKey"
-          type="password"
-          placeholder="Auth Key"
-          @keyup.enter="handleLogin"
-        />
-        <n-button type="primary" block @click="handleLogin" :loading="loading">Login</n-button>
-      </n-space>
-    </n-card>
-  </div>
-</template>
-
 <script setup lang="ts">
-import { authService } from "@/services/auth";
+import { useAuthService } from "@/services/auth";
 import { NButton, NCard, NInput, NSpace, useMessage } from "naive-ui";
 import { ref } from "vue";
 import { useRouter } from "vue-router";
@@ -24,6 +8,7 @@ const authKey = ref("");
 const loading = ref(false);
 const router = useRouter();
 const message = useMessage();
+const { login } = useAuthService();
 
 const handleLogin = async () => {
   if (!authKey.value) {
@@ -31,7 +16,7 @@ const handleLogin = async () => {
     return;
   }
   loading.value = true;
-  const success = await authService.login(authKey.value);
+  const success = await login(authKey.value);
   loading.value = false;
   if (success) {
     router.push("/");
@@ -41,16 +26,38 @@ const handleLogin = async () => {
 };
 </script>
 
+<template>
+  <div class="login-container">
+    <n-card class="login-card" title="登录">
+      <div>auth: {{ authKey }}</div>
+      <n-space vertical>
+        <n-input
+          v-model:value="authKey"
+          type="password"
+          placeholder="Auth Key"
+          @keyup.enter="handleLogin"
+        />
+        <n-button class="login-btn" type="primary" block @click="handleLogin" :loading="loading">
+          Login
+        </n-button>
+      </n-space>
+    </n-card>
+  </div>
+</template>
+
 <style scoped>
 .login-container {
+  height: 100%;
   display: flex;
   justify-content: center;
   align-items: center;
-  height: 100vh;
-  background-color: #f0f2f5;
 }
 
 .login-card {
-  width: 400px;
+  max-width: 400px;
+}
+
+.login-btn {
+  margin-top: 10px;
 }
 </style>