Widget _buildRadiusRound(BuildContext context) {
    // 胶囊型，数值设置较大
    return Container(
      width: 100,
      height: 50,
      decoration: BoxDecoration(
          color: TDTheme.of(context).brandNormalColor,
          borderRadius: BorderRadius.circular(TDTheme.of(context).radiusRound)),
    );
  }