<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://libs.baidu.com/bootstrap/3.2.0/css/bootstrap.min.css">
</head>
<body>
<div class="container">
<h2>排版</h2>
<p>这是一个普通的段落。</p>
<p class="small">这是个文字更小。</p>
<p>这是一个普通的段落。</p>
</div>
<script src="https://libs.baidu.com/jquery/2.1.1/jquery.min.js"></script>
<script src="https://libs.baidu.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
</body>
</html>