HTML
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>排版 - 副标题</title>
<link rel="stylesheet" href="https://cdn.w3cbus.com/library/mdui/1.0.2/css/mdui.min.css"/>
</head>
<body>
<div class="mdui-container">
<div class="mdui-typo">
<h1>h1 标题 heading <small>副标题 Secondary text</small></h1>
<h2>h2 标题 heading <small>副标题 Secondary text</small></h2>
<h3>h3 标题 heading <small>副标题 Secondary text</small></h3>
<h4>h4 标题 heading <small>副标题 Secondary text</small></h4>
<h5>h5 标题 heading <small>副标题 Secondary text</small></h5>
<h6>h6 标题 heading <small>副标题 Secondary text</small></h6>
</div>
</div>
<script src="https://cdn.w3cbus.com/library/mdui/1.0.2/js/mdui.min.js"></script>
</body>
</html>