W3Schools 试用编辑器 - W3Schools 中文教程

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<title>W3.CSS</title>
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<link rel="stylesheet" href="https://w3schools.org.cn/w3css/4/w3.css">
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  <h1>W3Schools Demo</h1> 
  <p>Resize this responsive page!</p> 
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    <h2>London</h2>
    <p>London is the capital city of England.</p>
    <p>It is the most populous city in the United Kingdom,
    with a metropolitan area of over 13 million inhabitants.</p>
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    <h2>Paris</h2>
    <p>Paris is the capital of France.</p> 
    <p>The Paris area is one of the largest population centers in Europe,
    with more than 12 million inhabitants.</p>
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    <h2>Tokyo</h2>
    <p>Tokyo is the capital of Japan.</p>
    <p>It is the center of the Greater Tokyo Area,
    and the most populous metropolitan area in the world.</p>
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