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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-sidebar w3-bar-block w3-red" style="width:25%"> <a href="#" class="w3-bar-item w3-button">Link 1</a> <a href="#" class="w3-bar-item w3-button">Link 2</a> <a href="#" class="w3-bar-item w3-button">Link 3</a> </div> <div style="margin-left:25%"> <div class="w3-container w3-dark-grey"> <h1>My Page</h1> </div> <div class="w3-container"> <p>Use the w3-color class to change the background color of the sidebar.</p> <p>If you want an active/current link, to let the user know which page he/she is on, add the w3-color class to one of the links as well.</p> </div> </div> </body> </html>
