修改样式

src/views/layout/components/Sidebar/SidebarItem.vue

     }
   }
 }
-.el-menu-item{
+.menu-wrapper{
+  .el-menu-item{
    background-color:#1F2D3D !important;
+  }
+  .el-menu{
+    background-color:#1F2D3D !important;
+  }
+  .el-submenu__title{
+    background-color:#1F2D3D !important;
+  }
 }
-.el-menu{
-  background-color:#1F2D3D !important;
-}
-.el-submenu__title{
-  background-color:#1F2D3D !important;
-}
+
 </style>