diff --git a/frontend/includes/header.php b/frontend/includes/header.php
index 7d31963..0eb0b6d 100644
--- a/frontend/includes/header.php
+++ b/frontend/includes/header.php
@@ -42,8 +42,8 @@ $page_title = $page_title ?? '首页';
         </div>
     </div>
     <script>
-        const API_BASE_URL = '<?php echo API_BASE_URL; ?>';
-        const JWT_STORAGE_KEY = '<?php echo JWT_STORAGE_KEY; ?>';
-        const USER_STORAGE_KEY = '<?php echo USER_STORAGE_KEY; ?>';
+        window.API_BASE_URL = '<?php echo API_BASE_URL; ?>';
+        window.JWT_STORAGE_KEY = '<?php echo JWT_STORAGE_KEY; ?>';
+        window.USER_STORAGE_KEY = '<?php echo USER_STORAGE_KEY; ?>';
     </script>
     <script src="/assets/js/common.js"></script>
\ No newline at end of file
diff --git a/frontend/index.php b/frontend/index.php
index 0bb7a5f..d8cfd39 100644
--- a/frontend/index.php
+++ b/frontend/index.php
@@ -56,9 +56,9 @@ if (isset($_SESSION['user_id']) && isset($_SESSION['user_type'])) {
     </div>
 
     <script>
-        const API_BASE_URL = '<?php echo API_BASE_URL; ?>';
-        const JWT_STORAGE_KEY = '<?php echo JWT_STORAGE_KEY; ?>';
-        const USER_STORAGE_KEY = '<?php echo USER_STORAGE_KEY; ?>';
+        window.API_BASE_URL = '<?php echo API_BASE_URL; ?>';
+        window.JWT_STORAGE_KEY = '<?php echo JWT_STORAGE_KEY; ?>';
+        window.USER_STORAGE_KEY = '<?php echo USER_STORAGE_KEY; ?>';
 
         document.getElementById('loginForm').addEventListener('submit', async (e) => {
             e.preventDefault();