更新

src/assets/css/layout.scss

@@ -98,7 +98,7 @@ header {
   height: calc(100vh - 137px);
   overflow: auto;
   border: 1px solid #ccc;
-  top: 10px;
+  top: 4px;
   right: 10px;
   left: 10px;
   background-color: #fff;
@@ -262,6 +262,7 @@ header {
       position: absolute;
       right: 0px;
       left: 0px;
+      background: #fff;
     }
   }
 }