HarmonyOS 报错Cannot find name 'backgroundColor'. Did you mean the instance member 'this.backgroundColor'?

自定义的CardView想在调用的地方设置backgroundColor等属性值，无法设置报以上错误。

// 自定的CardView
@Component
export struct CardView {
  @BuilderParam private content: () => void // 控件占位符

  build() {
    Column() {
      this.content()
    }
    .shadow({
      radius: 6,
      color: Color.Grey,
      offsetX: 0,
      offsetY: 0
    })
    .padding({
      left: 30,
      right: 30,
      top: 20,
      bottom: 20
    })
    .borderRadius(6)
    .alignItems(HorizontalAlign.Start)
  }
}

// 调用CardView
CardView() {
  Row() {
  }.width("100%")
}
.backgroundColor(Color.White) // 这里报错：Cannot find name 'backgroundColor'. Did you mean the instance member 'this.backgroundColor'?