diff --git a/public/stylesheets/educoder/edu-all.css b/public/stylesheets/educoder/edu-all.css
index db1a8de5..24d992c9 100644
--- a/public/stylesheets/educoder/edu-all.css
+++ b/public/stylesheets/educoder/edu-all.css
@@ -103,7 +103,8 @@ em.vertical-line{display: inline-block;width: 2px;background: #999;height: 10px}
 /*门户左侧导航栏*/
 .user_navlist{position: absolute;left: 0px;width: 160px;top:0px;height: 100%;}
 .user_navlist_black{position: relative;width: 100%;height: 100%;border-radius: 8px 0px 0px 8px;background: rgba(0,0,0,0.8);}
-.user_navlist_white{position: absolute;left: 160px;background: #FFFFff;width: 622px;min-height: 345px;top: 0px;z-index: 1;display: none;padding:0px 30px;box-sizing: border-box;box-shadow: 0px 0px 10px rgba(76,76,76,0.2);z-index: 99}
+.user_navlist_white{position: absolute;left: 160px;background: #FFFFff;width: 622px;min-height: 345px;top: 0px;z-index: 1;display: none;padding:0px 30px;
+    box-sizing: border-box;box-shadow: 0px 0px 10px rgba(76,76,76,0.2);z-index: 99;max-height: 345px;overflow-y: auto;}
 .user_navlist_white a{color: #989898;margin-right: 15px;font-size: 14px;display: block;float: left;height: 30px;line-height: 30px;}
 .user_navlist_white a:hover{color: #4cacff}
 .headIcon{height: 100%;box-sizing: border-box;margin: 0px!important;}