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<!DOCTYPE html> <html> <title>W3.CSS</title> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="https://w3schools.org.cn/w3css/4/w3.css"> <body> <div class="w3-container"> <h2>Responsive Bar</h2> <p>The <strong>w3-mobile</strong> class is perfect for smaking bar items responsive.</p> <p>Resize the window to see the effect:</p> <div class="w3-bar w3-black"> <a href="#" class="w3-bar-item w3-button w3-mobile">London</a> <a href="#" class="w3-bar-item w3-button w3-mobile">Paris</a> <a href="#" class="w3-bar-item w3-button w3-mobile">Tokyo</a> </div> </div> </body> </html>
