body{background: #f5f5f5}
.bigimg{width:600px;position: fixed;left: 0;top: 0; right: 0;bottom: 0;margin:auto;display: none;z-index:9999;border: 10px solid #fff;cursor: pointer;}
.mask{position: fixed;left: 0;top: 0; right: 0;bottom: 0;background-color: #000;opacity:0.5;filter: Alpha(opacity=50);z-index: 1998;transition:all 1s;display: none}
.bigbox{width:840px;background: #fff;border:1px solid #ededed;margin:0 auto;border-radius: 10px;overflow: hidden;padding:10px;}
.bigbox>.imgbox{width:400px;height:250px;float:left;border-radius:5px;overflow: hidden;margin: 0 10px 10px 10px;}
.bigbox>.imgbox>img{width:100%;}
.imgbox:hover{cursor:zoom-in}
.mask:hover{cursor:zoom-out}
.mask>img{position: fixed;right:10px;top: 10px;width: 60px;}
.mask>img:hover{cursor:pointer}
.smallimg:hover{cursor:zoom-in}