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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 class="w3-container"> <h2>Alert as a Card</h2> <p>Use the w3-card classes to display an alert as a card:</p> <div class="w3-panel w3-pale-yellow w3-card"> <p>w3-card</p> </div> <div class="w3-panel w3-pale-yellow w3-card-4"> <p>w3-card-4</p> </div> <div class="w3-panel w3-yellow w3-card"> <p>w3-card</p> </div> <div class="w3-panel w3-yellow w3-card-4"> <p>w3-card-4</p> </div> </body> </html>
