<!DOCTYPE html>
<html>
<head>
<style>
#myDIV {
background-color: lightblue;
border: 1px solid black;
animation: mymove 5s infinite;
}
@keyframes mymove {
50% {padding-top: 50px;}
}
</style>
</head>
<body>
<h1>padding-top 的动画</h1>
<p>逐渐将 padding-top 从 0px 更改为 50px,然后再更改回 0px:<p>
<div id="myDIV">
Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat...
</div>
<p><strong>注意:</strong>CSS 动画在 Internet Explorer 9 及更早版本中不起作用。</p>
</body>
</html>