演示代码：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<link rel="stylesheet" type="text/css" href="reset.css"/>
<style type="text/css">
#box{
width: 200px;height: 200px;background-color: #000;
margin: 200px auto;
perspective: 500px;
}
.wyzx{
width: 200px;height: 200px;background-color: #f00;
transition: transform 1s;
/* 当元素不面向屏幕是否可见 */
backface-visibility: hidden;
}
.wyzx:hover{
/* 转换简写 */
/* transform: translate(100px,50px) scale(0.5,0.8) rotateZ(45deg) skewX(30deg); */
transform: rotateY(90deg);
}
</style>
</head>
<body>
<div id="box">
<div class="wyzx">我要自学</div>
</div>
</body>
</html>
