HarmonyOS Button 无法添加margin left right

@Entry  
@Component  
struct TextInputExample {  
  build() {  
    NavDestination(){  
      Column() {  
        Text('注册成功').margin({top:35}).fontSize(16)  
        Button('确认')  
          .borderRadius(8)  
          .backgroundColor(0x317aff)  
          .margin({top:30,left:50,right:50})  
          .width('100%')  
          .constraintSize({ maxWidth: '100%' })  
  
        Text('您还可以通过该通信证的注册手机号和密码直接登录重庆客户端')  
          .width('100%')  
          .fontSize(16)  
          .margin({top:30,left:20,right:20})  
          .constraintSize({ maxWidth: '100%' })  
      }.backgroundColor('#eeeeee').height('100%')  
    }  
  }  
}