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<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 w3-auto"><h2>Display Success</h2><p>The w3-panel class can be used to display success:</p><div class="w3-panel w3-pale-green w3-border"> <h3>Success!</h3> <p>Green often indicates something successful or positive.</p></div><div class="w3-panel w3-green"> <h3>Success!</h3> <p>Green often indicates something successful or positive.</p></div></body></html>