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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="../assets/mdui-v0.4.3/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>
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