Widget _shadowNavbar(BuildContext context) {
    return TDNavBar(
      height: 48,
      titleFontWeight: FontWeight.w600,
      title: titleText,
      screenAdaptation: false,
      useDefaultBack: true,
      boxShadow: [
        BoxShadow(
          blurRadius: 4,
          offset: const Offset(0, 4),
          color: TDTheme.of(context).grayColor5,
        )
      ],
    );
  }