diff --git a/frontend/index.html b/frontend/index.html
index d4fac6b..e642704 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -6,6 +6,14 @@
     <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
     <title>企迹 - 政企周报管理系统</title>
 
+    <!-- Apply saved theme before page render to prevent flash -->
+    <script>
+      (function() {
+        var theme = localStorage.getItem('theme') || 'editorial';
+        document.documentElement.setAttribute('data-theme', theme);
+      })();
+    </script>
+
     <!-- Preconnect to Google Fonts origins for faster font loading -->
     <link rel="preconnect" href="https://fonts.googleapis.com">
     <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>