diff --git a/app/templates/base.html b/app/templates/base.html
index f62767b..f1c269a 100644
--- a/app/templates/base.html
+++ b/app/templates/base.html
@@ -1,11 +1,21 @@
 {# 基础模板 #}
 <!DOCTYPE html>
-<html lang="zh-CN" data-theme="light">
+<html lang="zh-CN">
 <head>
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>{% block title %}智队中枢{% endblock %}</title>
     
+    {# 立即应用主题 - 防止闪烁 #}
+    <script>
+        // 立即应用保存的主题，阻塞渲染防止闪烁
+        (function() {
+            const theme = localStorage.getItem('theme') || 'light';
+            document.documentElement.classList.add(theme === 'dark' ? 'dark' : '');
+            document.documentElement.setAttribute('data-theme', theme);
+        })();
+    </script>
+    
     {# Tailwind CSS #}
     <script src="https://cdn.tailwindcss.com"></script>
     <script>
