style: 头部颜色

src/global.less

@@ -17,6 +17,9 @@ body,
 //   background: #595284;
 //   border-left: 3px solid #886ab5;
 // }
+.ant-layout-header{
+  background: linear-gradient(to right, #584475 0%, #7c62a4 50%, #7c62a4 50%, #584475 100%);
+}
 .ant-menu-dark .ant-menu-inline.ant-menu-sub {
   background: #ffffff;
 }