App下載
實(shí)例代碼( Tip: 登錄后體驗(yàn)更佳 )
<!DOCTYPE html>
<html>
<head>
    <title>W3.CSS(w3cschool.cn)</title>
    <meta name="viewport" content="width=device-width, initial-scale=1" charset="UTF-8">
    <link rel="stylesheet" href="https://7npmedia.w3cschool.cn/w3.css">
</head>
<body>
<div class="w3-container">
    <h1>标题1（36像素）</h1>
    <h2>标题2（30像素）</h2>
    <h3>标题3（24像素）</h3>
    <h4>标题4（20像素）</h4>
    <h5>标题5（18像素）</h5>
    <h6>标题6（16像素）</h6>
</div>
</body>
</html>
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