#CSS 本文深入解析了 CSS position: sticky 的常见“坑”：粘性元素不能大于滚动容器，也不能被尺寸过小的祖先块限制，尤其在 Flex/Grid 布局中默认的 stretch 对齐会让粘性失效；解决办法是给相关元素设置 align-self: flex-start 或限制高度并内部滚动，确保粘性元素在规范允许的包含块内自由“粘贴”。 https://frontendmasters.com/blog/the-weird-parts-of-position-sticky/

Frontend Masters

The Weird Parts of position: sticky;

Using position: sticky; is one of those CSS features that’s incredibly useful, seemingly simple, and also, frequently frustrating.