diff --git a/application/views/mobile_first/ch.php b/application/views/mobile_first/ch.php
index 840c2866..69020485 100644
--- a/application/views/mobile_first/ch.php
+++ b/application/views/mobile_first/ch.php
@@ -44,7 +44,7 @@
   <!--头部导航-->
   <header class="headerbar" id="header">
     <div role="button" class="topnavibutton">
-      <img src="https://data.chinahighlights.com/image/tour-detail/icon/top-navigation-menu-button.jpg" class="navimenu topnaviarrowdown action--open" width="26px" height="25px" style="position: relative; left: 10px; top: 12px;">
+      <img src="https://data.chinahighlights.com/image/tour-detail/icon/top-navigation-menu-button.jpg" class="navimenu topnaviarrowdown action--open" width="26px" height="25px" style="position: relative; left: 10px; top: 12px; z-index: 9;">
       <a href="/" style="width: 100%;
     display: inline-block;
     position: relative;