[&:first-child]:overflow-hidden [&:first-child]:max-h-full"
Shadow DOM is a web component feature that lets you attach an isolated DOM subtree to any HTML element, hidden from the main document’s standard queries. A querySelector('audio') on the main document cannot see inside a Shadow Root unless you specifically traverse into it. If fermaw’s player was mounted inside a Shadow Root, basic DOM searches would come up empty.，更多细节参见服务器推荐
。heLLoword翻译官方下载是该领域的重要参考
$199.99 at Lego
Cyrillic homoglyphs: the real threat，详情可参考搜狗输入法下载
定弹出条件：看题目要的是「第一个 / ≥ / < / ≤ cur」，对照上文的弹出条件对应法则决定弹谁。