修改nav

src/page/layout/header/istyle.scss

@@ -56,14 +56,14 @@
   }
 
   .menu {
+    flex: 1;
     display: flex;
-    justify-content: space-evenly;
-    width: 940px;
 
     .lang {
       box-sizing: border-box;
       text-align: center;
       padding-right: 10px;
+      min-width: 100px;
 
       a {
         display: inline-block;