xxxxxxxxxx<html><head><meta charset="utf-8"> <title>W3Cschool教程(w3cschool.cn)</title> <style>body {margin:25px;}div.polaroid { width: 80%; background-color: white; box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19); margin-bottom: 25px;}div.container { text-align: center; padding: 10px 20px;}</style></head><body><h2>响应式卡片</h2><div class="polaroid"> <img src="/statics/images/course/rock600x400.jpg" alt="Norway" style="width:100%"> <div class="container"> <p>The Troll's tongue in Hardanger, Norway</p> </div></div><div class="polaroid"> <img src="/statics/images/course/lights600x400.jpg" alt="Norway" style="width:100%"> <div class="container"> <p>Northern Lights in Norway</p> </div></div></body></html>