<!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 mt-3">
<h1>键盘输入</h1>
<p>如需表示通常通过键盘键入的输入内容，请使用 kbd 元素：</p>
<p>请使用 <kbd>ctrl + p</kbd> 打开打印对话框。</p>
</div>
</body>
</html>