<!DOCTYPE html>
<html>
<head>
<style>
#div1 { position: relative;
margin: auto;
height: 150px;
width: 250px;
padding: 10px;
border: 1px solid black;
animation: mymove 5s infinite;
perspective: 200px;
}
@keyframes mymove { 50% {perspective: 100px;}}
#div2 { padding: 50px;
position: absolute;
border: 1px solid black;
background-color: red;
transform: rotateX(45deg);
}
</style>
</head>
<body>
<h1>perspective 的动画效果：</h1>
<div id="div1">DIV1
<div id="div2">请想象您正在墙上向下看。看看逐渐改变视角会发生什么！</div>
</div>
<p><b>注释：</b>CSS 动画在 Internet Explorer 9 以及更早版本中不起作用。</p>
</body>
</html>