<html><title>W3.CSS</title><meta name="viewport" content="width=device-width, initial-scale=1"><link rel="stylesheet" href="https://www.w3schools.cn/w3css/4/w3.css"><body><div class="w3-container w3-xlarge"> <h1>悬停文本</h1> <a href="#" class="w3-hover-text-yellow">悬停</a> <p class="w3-hover-text-yellow">悬停</p> <div class="w3-panel w3-border w3-black w3-hover-text-yellow"> <p><b>悬停</b></p> </div> <button class="w3-btn w3-border w3-hover-text-yellow">悬停</button></div></body></html>