fix ie bug

assets/stylesheets/template/layout/content.scss

@@ -379,7 +379,8 @@
     }
     li{
       padding: 0.5em;
-      flex: 0 0 25%;
+      //flex: 0 0 25%;
+      width: 25%;
       position: relative;
       @media screen and (min-width:$screen-xs) and (max-width:990px){
         flex: 0 0 50%;