diff --git a/backend/server.js b/backend/server.js
index ccec88c..c817d3c 100644
--- a/backend/server.js
+++ b/backend/server.js
@@ -1652,13 +1652,23 @@ app.post('/api/login',
 
       // 增强Cookie安全设置
       const isSecureEnv = process.env.COOKIE_SECURE === 'true';
-      res.cookie('token', token, {
+      const cookieOptions = {
         httpOnly: true,
         secure: isSecureEnv,
-        // HTTPS环境使用strict，HTTP环境使用lax（开发环境兼容）
         sameSite: isSecureEnv ? 'strict' : 'lax',
-        maxAge: 2 * 60 * 60 * 1000, // 2小时（与access token有效期一致）
-        path: '/'  // 限制Cookie作用域
+        path: '/'
+      };
+
+      // 设置 access token Cookie（2小时有效）
+      res.cookie('token', token, {
+        ...cookieOptions,
+        maxAge: 2 * 60 * 60 * 1000
+      });
+
+      // 设置 refresh token Cookie（7天有效）
+      res.cookie('refreshToken', refreshToken, {
+        ...cookieOptions,
+        maxAge: 7 * 24 * 60 * 60 * 1000
       });
 
       // 记录登录成功日志
@@ -1667,8 +1677,6 @@ app.post('/api/login',
       res.json({
         success: true,
         message: '登录成功',
-        token,
-        refreshToken,  // 返回refresh token
         expiresIn: 2 * 60 * 60 * 1000,  // 告知前端access token有效期（毫秒）
         user: {
           id: user.id,
@@ -1694,9 +1702,10 @@ app.post('/api/login',
   }
 );
 
-// 刷新Access Token
+// 刷新Access Token（从 HttpOnly Cookie 读取 refreshToken）
 app.post('/api/refresh-token', (req, res) => {
-  const { refreshToken } = req.body;
+  // 优先从 Cookie 读取，兼容从请求体读取（向后兼容）
+  const refreshToken = req.cookies?.refreshToken || req.body?.refreshToken;
 
   if (!refreshToken) {
     return res.status(400).json({
@@ -1720,21 +1729,21 @@ app.post('/api/refresh-token', (req, res) => {
     httpOnly: true,
     secure: isSecureEnv,
     sameSite: isSecureEnv ? 'strict' : 'lax',
-    maxAge: 2 * 60 * 60 * 1000, // 2小时
+    maxAge: 2 * 60 * 60 * 1000,
     path: '/'
   });
 
   res.json({
     success: true,
-    token: result.token,
     expiresIn: 2 * 60 * 60 * 1000
   });
 });
 
 // 登出（清除Cookie）
 app.post('/api/logout', (req, res) => {
-  // 清除认证Cookie
+  // 清除所有认证Cookie
   res.clearCookie('token', { path: '/' });
+  res.clearCookie('refreshToken', { path: '/' });
   res.json({ success: true, message: '已登出' });
 });
 
diff --git a/frontend/app.js b/frontend/app.js
index ef16b86..e7a78f4 100644
--- a/frontend/app.js
+++ b/frontend/app.js
@@ -10,8 +10,7 @@ createApp({
       // 用户状态
       isLoggedIn: false,
       user: null,
-      token: null,
-      refreshToken: null,
+      token: null,  // 仅用于内部状态跟踪，实际认证通过 HttpOnly Cookie
       tokenRefreshTimer: null,
 
       // 视图状态
@@ -527,8 +526,7 @@ handleDragLeave(e) {
         const response = await axios.post(`${this.apiBase}/api/login`, this.loginForm);
 
         if (response.data.success) {
-          this.token = response.data.token;
-          this.refreshToken = response.data.refreshToken;
+          // token 和 refreshToken 都通过 HttpOnly Cookie 自动管理
           this.user = response.data.user;
           this.isLoggedIn = true;
           this.showResendVerify = false;
@@ -1002,7 +1000,6 @@ handleDragLeave(e) {
       this.isLoggedIn = false;
       this.user = null;
       this.token = null;
-      this.refreshToken = null;
       this.stopTokenRefresh();
       localStorage.removeItem('user');
       localStorage.removeItem('lastView');
@@ -1086,12 +1083,11 @@ handleDragLeave(e) {
 
     // 尝试刷新token，失败则登出
     async tryRefreshOrLogout() {
-      if (this.refreshToken) {
-        const refreshed = await this.doRefreshToken();
-        if (refreshed) {
-          await this.checkLoginStatus();
-          return;
-        }
+      // refreshToken 通过 Cookie 自动管理，直接尝试刷新
+      const refreshed = await this.doRefreshToken();
+      if (refreshed) {
+        await this.checkLoginStatus();
+        return;
       }
       this.handleTokenExpired();
     },
@@ -1102,7 +1098,6 @@ handleDragLeave(e) {
       this.isLoggedIn = false;
       this.user = null;
       this.token = null;
-      this.refreshToken = null;
       this.stopTokenRefresh();
       localStorage.removeItem('user');
       localStorage.removeItem('lastView');
@@ -1130,18 +1125,12 @@ handleDragLeave(e) {
       }
     },
 
-    // 执行token刷新（通过 refreshToken 刷新 HttpOnly Cookie 中的 access token）
+    // 执行token刷新（refreshToken 通过 HttpOnly Cookie 自动发送）
     async doRefreshToken() {
-      if (!this.refreshToken) {
-        console.log('[认证] 无refresh token，无法刷新');
-        return false;
-      }
-
       try {
         console.log('[认证] 正在刷新access token...');
-        const response = await axios.post(`${this.apiBase}/api/refresh-token`, {
-          refreshToken: this.refreshToken
-        });
+        // refreshToken 通过 Cookie 自动携带，无需手动传递
+        const response = await axios.post(`${this.apiBase}/api/refresh-token`);
 
         if (response.data.success) {
           // 后端已自动更新 HttpOnly Cookie 中的 token