CSS3 box-shadow

<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>CSS3 box-shadow</title>
<style>
body{margin: 0;padding: 100px;background-color: #eee;}
.example{
    width: 150px;
    height: 80px;
    margin: 10px;
    float: left;
    background-color: #ffffff;
}
.example1{
    -webkit-box-shadow: 3px 3px 5px 0px #ccc;
    -moz-box-shadow: 3px 3px 5px 0px #ccc;
    box-shadow: 3px 3px 5px 0px #ccc;
}
.example2{
    -webkit-box-shadow: -2px 0 0 green,0 -2px 0 blue, 0 2px 0 red, 2px 0 0 yellow;
    -moz-box-shadow: -2px 0 0 green,0 -2px 0 blue, 0 2px 0 red, 2px 0 0 yellow;
    box-shadow: -2px 0 0 green,0 -2px 0 blue, 0 2px 0 red, 2px 0 0 yellow;
}
.example3{
    -webkit-box-shadow: inset 0 0 10px red;
    -moz-box-shadow: inset 0 0 10px red;
    box-shadow: inset 0 0 10px red;
}
.example4{
    position: relative;
    width: 300px;
    height: 150px;
}
.example4:before,.example4:after{
    content: "";
    position: absolute;
    z-index: -1;
    bottom: 15px;
    left: 10px;
    width: 50%;
    height: 30%;
    /*add box-shadow*/
    -webkit-box-shadow: 0 15px 10px rgba(125,125,125,0.8);
    -moz-box-shadow: 0 15px 10px rgba(125,125,125,0.8);
    box-shadow: 0 15px 10px rgba(125,125,125,0.8);
    /*add css3 transform*/
    -webkit-transform: rotate(-3deg);
    -moz-transform: rotate(-3deg);
    -o-transform: rotate(-3deg);
    transform: rotate(-3deg);
}
.example4:after {
    right:10px;
    left: auto;
    -webkit-transform:rotate(3deg);
    -moz-transform:rotate(3deg);
    -o-transform:rotate(3deg);
    transform:rotate(3deg);
}
</style>
</head>
<body>
    <div class="example example1"></div>
    <div class="example example2"></div>
    <div class="example example3"></div>
    <div class="example example4"></div>
</body>
</html>
如下所示：
高否？富否？帅否？否？滚去学习！