HarmonyOS bindMenu使用如何移除白色背景？

@Entry  
@Component  
struct DirectiveMenuExample {  
  @Builder MenuBuilder() {  
    Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {  
      Text('Options')  
      Divider().strokeWidth(2).margin(5).color('#F0F0F0')  
      Text('Hide')  
      Divider().strokeWidth(2).margin(5).color('#F0F0F0')  
      Text('Exit')  
    }.backgroundColor(Color.Orange).width(200)  
  }  
  build() {  
    Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {  
      Column() {  
        Text("MenuExample").fontSize(20).width('100%').height("25%").backgroundColor('#F0F0F0').textAlign(TextAlign.Center)  
          .bindMenu(this.MenuBuilder, { placement: Placement.Bottom, backgroundColor: Color.Orange, backgroundBlurStyle: BlurStyle.NONE })  
      }  
    }  
    .backgroundColor(Color.Pink).width('100%') .height('100%')  
  }  
}