perf[Login]: refine css

src/views/login/index.vue

@@ -262,8 +262,10 @@ $light_gray:#eee;
     .set-language {
       color: #fff;
       position: absolute;
-      top: 5px;
+      top: 3px;
+      font-size:18px;
       right: 0px;
+      cursor: pointer;
     }
   }
   .show-pwd {