style：导航样式

resource/staticres/css/common/header-nav-mini.css

@@ -208,7 +208,7 @@ a.j-s-button:hover {
 }
 
 .header-nav-content .nav-tip {
-  margin: 0 20px;
+  margin: 0 12px;
   color: #686868;
 }