<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title>box-shadow</title>
<style>
    body {
    font-family: Arial;
    font-size: 23px;
}
 
.wrap h3 {
    text-align: center;
    position: relative;
    top: 80px;
}
 
.wrap {
    width: 70%;
    height: 200px;
    background: #FFF;
    margin: 40px auto;
}
 
.effect {
    position: relative;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3), 0 0 40px rgba(0, 0, 0, 0.1) inset;/*inset内阴影*/
}
 
.effect:before, .effect:after {/*两个 阴影效果更好*/
    content: "";
    position: absolute;
    z-index: -1;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.8);
    top: 50%;/*top/bottom/left/right 相当于设置宽高*/
    bottom: 0;
    left: 10px;
    right: 10px;
    border-radius: 100px / 10px;/*水平半径100 垂直10*/
}
 
ul.box {
    width: 980px;
    height: auto;
    margin: 20px auto;
    padding: 0;
    clear: both;
    overflow: hidden;
}
 
ul.box li {
    list-style-type: none;
    margin: 20px 10px;
    padding: 0;
    width: 300px;
    height: 220px;
    border: 2px solid #efefef;
    position: relative;
    float: left;
    background: #ffffff;
    line-height: 220px;
    font-size: 32px;
    text-align: center;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.27), 0 0 60px rgba(0, 0, 0, 0.1) inset;
}
 
ul.box li:before {
    z-index: -2;
    position: absolute;
    background: transparent;
    width: 90%;
    height: 80%;
    content: '';
    left: 20px;
    bottom: 8px;
    transform: skew(-12deg) rotate(-4deg);/*skew图形转换(变形) 负值向左*/
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.6);
}
 
ul.box li:after {
    z-index: -1;
    position: absolute;
    background: transparent;
    width: 90%;
    height: 80%;
    content: '';
    right: 20px;
    bottom: 8px;
    transform: skew(12deg) rotate(4deg);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.6);
}
 
.box li img {
    width: 290px;
    height: 210px;
    padding: 5px;
}
    
    </style>
</head>
<body>
  <div class="wrap effect">
     <h3>Shadow Effect</h3>
  </div>
  <ul class="box">
      <li><img src="images/photo1.jpg"/></li>
      <li><img src="images/photo2.jpg"/></li>
      <li><img src="images/photo3.jpg"/></li>
  </ul>
</body>
</html>

 

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