效果预览
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style type="text/css">
.box{
width: 100%;
height: 200px;
background-color: #1BBBC3;
position: relative;
}
.box .line{
cursor: pointer;
position: absolute;
left: -100%;
top: 0;
width: 100%;
height: 100%;
background-image: -webkit-linear-gradient(0deg,hsla(0,0%,100%,0),hsla(0,0%,100%,.5),hsla(0,0%,100%,0));
transform: skewx(-25deg);
-o-transform: skewx(-25deg);
-moz-transform: skewx(-25deg);
-webkit-transform: skewx(-25deg)
}
.box:hover .line{
-webkit-transition: all .5s ease;
transition: all .5s ease;
left: 100%
}
</style>
</head>
<body>
<div class="box">
<div class="line"></div>
</div>
</body>
</html>
原文：http://www.cnblogs.com/htzan/p/6920305.html