bindMenu去不掉半透明背景 ，该怎么处理？

@Entry  
@Component  
struct Index {  
  @State select: boolean = true  
  @State menuList: string[] = ["3344 生生世世", "1314 生生世世", "999 生生世世", "520 生生世世", "666 生生世世"]  
  @Builder  
  MenuChild(title:string) {  
    Text(`${title}`).height(32).onClick(() => {  
      // this.currentMenu = item  
    })  
  }  
  @Builder  
  MyMenu() {  
    Menu() {  
      ForEach(this.menuList, (item: string) => {  
        MenuItem(this.MenuChild(item))  
      })  
    }.backgroundColor('#72359b')  
    .borderRadius('5vp')  
  }  
  
  build() {  
    Row() {  
      Column() {  
        Text('click to show menu')  
          .fontSize(20)  
          .fontWeight(FontWeight.Bold)  
      }  
      .bindMenu(this.MyMenu, {  
        placement: Placement.Top,  
      })  
      .width('100%')  
    }  
    .height('100%')  
    .backgroundColor(Color.Pink)  
  }  
}

shadow: {radius: 0},  
mask: false,  
popupColor: Color.Transparent,  
backgroundBlurStyle: BlurStyle.NONE,