<!DOCTYPE html> <html lang="en"> <head> <title>Bootstrap 实例</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link href="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/5.1.2/css/bootstrap.min.css" rel="stylesheet"> <script src="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/5.1.2/js/bootstrap.min.js"></script> </head> <body> <div class="container mt-3"> <h1>突出显示文本</h1> <p>使用 mark 元素(或 .mark 类)来 <mark>突出显示</mark> 文本。</p> </div> </body> </html>