<!DOCTYPE html>
<html>
<head>
<style>
#main { width: 400px;
height: 150px;
border: 1px solid #000000;
display: flex;
}
#main div { width: 70px;
height: 70px;
}
#myGreenDIV { animation: mymove 5s infinite;
}
@keyframes mymove { 50% {order: 6;}}
</style>
</head>
<body>
<h1>order 的动画效果：</h1>
<p>将绿色 div 元素的顺序从 1 更改为 6，然后改回 1：<p>
<div id="main">
<div style="background-color:lightgreen;order:1;" id="myGreenDIV"></div>
<div style="background-color:coral;order:2;"></div>
<div style="background-color:lightblue;order:3;"></div>
<div style="background-color:pink;order:4;"></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>