diff --git a/public/index.html b/public/index.html
index 8a2ef41..109ddaa 100644
--- a/public/index.html
+++ b/public/index.html
@@ -5,7 +5,6 @@
   <meta http-equiv="X-UA-Compatible" content="IE=edge" />
   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
   <link rel="icon" href="./static/images/favicon.ico" />
-  <link rel="stylesheet" href="https://a.amap.com/jsapi_demos/static/demo-center/css/demo-center.css" />
   <script src="./static/js/is/crypto-js.js"></script>
   <script src="./static/js/is/jsencrypt.min.js"></script>
   <script src="./static/js/is/is.js"></script>