*{margin: 0;padding: 0;}
.lunbo-body-three{display: flex; height: 250px}
#divl{width: 3%; margin-top: 75px;}
#divl img{height: 80px;width: 25px}
#divc{width: 93.5%;}
#divr{width: 3%; margin-top: 75px;}
#divr img{height: 80px;width: 25px}
#div1{position: relative;border:1px solid white;width:99%; height: 180px;margin:22px auto 0;overflow: hidden;}
#div1 ul{position: absolute;left: 0;top:20px;}
#div1 ul li{list-style: none;width:196px;float: left;height:145px;}
#div ul div{border:1px solid black;width:500px;height: 500px;}
.img-ee{height: 140px;width:174px;}

.mask-box{width: 100%;height: 100%;position: fixed;top: 0;left: 0;background-color: rgba(0,0,0,0.8);display: flex;display: -webkit-flex;-webkit-justify-content: center;justify-content: center;-webkit-align-items: center;align-items: center;display: none;}
.mask-box .img-show-box{width: 680px;height: 460px;display: block;margin: 250px auto;background: white;}
.mask-box .img-show-box .btn-left-box{width:5px;height: 460px;float: left;}
.mask-box .img-show-box .btn-top-box{width:680px;height: 5px;float:top;}
.mask-box .img-show-box .btn-right-box{width:5px;height: 460px;float: right;padding-top: 0;}
.mask-box .img-show-box .img-show-pic{width: 580px;height:460px;}
.mask-box .img-show-box .btn-left-box img{margin-top:215px;width: 30px;height: 30px;position: absolute;z-index: 4;margin-left:  20px;}
.mask-box .img-show-box .btn-top-box img{width: 30px;margin-left: 627px;margin-top: 18px;height: 30px;position: absolute;z-index: 3;}
.mask-box .img-show-box .btn-right-box img{margin-top:215px;margin-left: -45px;width: 30px;height: 30px;position: absolute;z-index: 3;}
.mask-box .img-show-box .img-show-pic img{width:670px;height:450px;position: absolute;z-index: 2;}