diff --git a/webht/views/n-header.php b/webht/views/n-header.php
index 2881dc99..6421d1b4 100644
--- a/webht/views/n-header.php
+++ b/webht/views/n-header.php
@@ -6,7 +6,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1">
     <title>中华游在线</title>
     <link href="/css/webht/bootstrap.min.css" rel="stylesheet">
-    <link href="/css/nav/nav.css?v=20150723" rel="stylesheet">
+    <link href="/css/nav/nav.css?v=20200316" rel="stylesheet">
     <link href="/css/webht/jquery-ui-1.10.0.custom.css" rel="stylesheet">
     <script src="http://www.mycht.cn/min?f=/js/jquery.js,/js/bootstrap.min.js,/js/navigation.js,/js/jquery.form.min.js"></script>
     <script src="http://www.mycht.cn/js/jquery-ui.min.js?v=1"></script>