<!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.jsdelivr.net/npm/bootstrap@5.1.2/dist/css/bootstrap.min.css" rel="stylesheet">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/js/bootstrap.bundle.min.js"></script>
</head>
<body>
<div class="container">
<h1>我的第一张 Bootstrap 页面</h1>
<p>这部分在 .container 类中。</p>
<p>.container 类提供了响应式固定宽度的容器。</p>
<p>调整浏览器窗口的大小，可查看容器宽度将在不同断点处发生变化。</p>
</div>
</body>
</html>