Widget _buildCard(BuildContext context) {
  return const TDCellGroup(
    theme: TDCellGroupTheme.cardTheme,
    cells: [
      TDCell(arrow: true, title: '单行标题'),
      TDCell(arrow: true, title: '单行标题', required: true),
      TDCell(arrow: true, title: '单行标题'),
    ],
  );
}