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<!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">
    <h2>响应式导航栏</h2>
    <p><strong>w3-mobile</strong>类定义响应元件。</p>
    <p>在中型和大型屏幕（平板电脑和台式机）上，条形项目将水平并排出现。在小屏幕（智能手机）上，项目垂直且居中：</p>
    <p><strong>调整浏览器窗口的大小以查看效果。</strong></p>
    <p>默认导航栏：</p>
    <div class="w3-bar w3-black">
        <a href="#" class="w3-bar-item w3-button">主页</a>
        <a href="#" class="w3-bar-item w3-button">链接 1</a>
        <a href="#" class="w3-bar-item w3-button">链接 2</a>
        <a href="#" class="w3-bar-item w3-button">链接 3</a>
    </div>
    <p>响应式导航栏：</p>
    <div class="w3-bar w3-black">
        <a href="#" class="w3-bar-item w3-button w3-mobile">主页</a>
        <a href="#" class="w3-bar-item w3-button w3-mobile">链接 1</a>
        <a href="#" class="w3-bar-item w3-button w3-mobile">链接 2</a>
        <a href="#" class="w3-bar-item w3-button w3-mobile">链接 3</a>
    </div>
</div>
</body>
</html>
 
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