实例代码:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>伪类的使用</title>
<style>
.box {
width: 500px;
height: 200px;
background: lightblue;
font: 43px/200px "microsoft yahei";
color: darkblue;
text-align: center;
margin: 0 auto;
text-shadow: 0 1px 1px #fff;
position: relative;
}
.box:before,
.box:after {
content: ' ';
position: absolute;
bottom: 8px;
left: 5px;
width: 50%;
height: 20%;
box-shadow: 0 10px 20px #ccc;
transform: rotate(-3deg);
z-index: -1;
}
.box:after {
left: auto;
right: 5px;
transform: rotate(3deg);
}
</style>
</head>
<body>
<div class="box">
Hello World By CSS3
</div>
</body>
</html>
运行效果:
