代码示例：（标识：css_ex_images_card）
<!DOCTYPE html>
<html>
<head>
<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>
<h1>响应式宝丽来图像 / 卡片</h1>
<div class="polaroid">
<img src="/static/demo/images/tulip-yellow.jpg" alt="Tulip" style="width:100%">
<div class="container">
<p>黄色郁金香</p>
</div>
</div>
<div class="polaroid">
<img src="/static/demo/images/tulip-red.jpg" alt="Tulip" style="width:100%">
<div class="container">
<p>红色郁金香</p>
</div>
</div>
</body>
</html>
