Flutter开发中如何实现Container容器内文本顶部对齐

需要实现支持多行内容的有序列表排版，序号始终与对应条目的首行文本顶部对齐，目标效果如下：

1. ahjskdgad
2. asdhadada
3. asdhasuidhad
4. adhauishda
   saidjajiasdasd
5. asodhasdhasid
   isdoaoisdhas
   asodhasodh

现有代码使用Row横向排列序号和文本内容时，左侧序号会随着右侧多行文本的高度增加向下偏移，无法保持顶部对齐，原有实现代码：

Container(
      width: 300,
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Row(
            children: [
              Container(
                width: 10,
                child: Text(
                  '4.',
                  style: TextStyle(
                      color: Colors.white,
                      fontSize: 10,
                      fontWeight: FontWeight.w500),
                  textAlign: TextAlign.justify,
                ),
              ),
              Container(
                width: 290,
                child: Text(
                  'I hereby acknowledge and consent that company shall provide me with the information only through a durable medium, (i.e., any instrument which enables a client to store information for future reference and adequate period, and allows the unchanged reproduction of the information stored.',
                  style: TextStyle(
                      color: Colors.white,
                      fontSize: 10,
                      fontWeight: FontWeight.w500),
                  textAlign: TextAlign.justify,
                ),
              )
            ],
          ),
          Row(
            children: [
              Container(
                width: 10,
                child: Text(
                  '5.',
                  style: TextStyle(
                      color: Colors.white,
                      fontSize: 10,
                      fontWeight: FontWeight.w500),
                  textAlign: TextAlign.justify,
                ),
              ),
              Container(
                width: 290,
                child: Text(
                  'You agree that company may collect, use and disclose your personal data which you have provided in this form, for providing marketing material that you have agreed to receive, in accordance with Privacy Policy.',
                  style: TextStyle(
                      color: Colors.white,
                      fontSize: 10,
                      fontWeight: FontWeight.w500),
                  textAlign: TextAlign.justify,
                ),
              )
            ],
          ),
        ],
      ),
    ),

问题根源是Row组件默认的垂直对齐规则为居中对齐，当右侧文本高度超过单行时，左侧的序号组件会自动向垂直居中位置偏移。
修复只需要做两处核心调整：

• 给每个Row添加属性crossAxisAlignment: CrossAxisAlignment.start，强制行内所有子组件沿顶部对齐
• 移除右侧文本容器硬编码的290宽度，改用Expanded组件包裹右侧文本，自动适配父容器剩余宽度，避免硬编码宽度导致的内容溢出、边距异常问题
• 原序号容器10的宽度偏窄，容易挤压序号文本，适当调宽到20显示更合理

修改后的可运行代码：

Container(
      width: 300,
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Row(
            // 核心配置：行内组件顶部对齐
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Container(
                width: 20,
                child: Text(
                  '4.',
                  style: TextStyle(
                      color: Colors.white,
                      fontSize: 10,
                      fontWeight: FontWeight.w500),
                ),
              ),
              // 自动占满剩余宽度，无需硬编码宽度值
              Expanded(
                child: Text(
                  'I hereby acknowledge and consent that company shall provide me with the information only through a durable medium, (i.e., any instrument which enables a client to store information for future reference and adequate period, and allows the unchanged reproduction of the information stored.',
                  style: TextStyle(
                      color: Colors.white,
                      fontSize: 10,
                      fontWeight: FontWeight.w500),
                  textAlign: TextAlign.justify,
                ),
              )
            ],
          ),
          Row(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Container(
                width: 20,
                child: Text(
                  '5.',
                  style: TextStyle(
                      color: Colors.white,
                      fontSize: 10,
                      fontWeight: FontWeight.w500),
                ),
              ),
              Expanded(
                child: Text(
                  'You agree that company may collect, use and disclose your personal data which you have provided in this form, for providing marketing material that you have agreed to receive, in accordance with Privacy Policy.',
                  style: TextStyle(
                      color: Colors.white,
                      fontSize: 10,
                      fontWeight: FontWeight.w500),
                  textAlign: TextAlign.justify,
                ),
              )
            ],
          ),
        ],
      ),
    )

如果需要更精细的对齐效果，可以给左右两侧的Text组件设置相同的strutStyle，统一行高基准，彻底消除字体本身行高带来的细微对齐偏差。

内容的提问来源于stack exchange，提问作者Bernard