/* CSS Document */

 *{margin: 0;padding:0; }
 ul{list-style: none;}
 .banner{
 width: 1370px;
 height: 530px;
 position: relative;
 overflow: hidden;
 z-index: 1;
 margin-right: auto;
 margin-left: auto;
}
 .img{position: absolute;top: 0;left: 0;}
 .des{position: absolute;bottom: 0;left: 0;z-index: -2;background: #ccc}
 .des li{float: left;width: 1370px;}
 .img li{float: left;}
 .num{position: absolute;bottom: 10px;width: 100%;text-align: center;font-size: 0;}
 .num li{width: 10px;height: 10px;background:rgba(0,0,0,0.5);display: block;border-radius: 100%;display: inline-block;margin: 0 5px;cursor: pointer;}
 .btn{display: none;}
 .btn span{display: block;width: 50px;height: 100px;background: rgba(0,0,0,0.6);color: #fff;font-size: 40px;line-height: 100px;text-align: center;cursor:pointer;}
 .btn .prev{position: absolute;left: 0;top: 50%;margin-top: -50px;}
 .btn .next{position: absolute;right: 0;top: 50%;margin-top: -50px;}
 .num .active{background-color: #fff;}
 .hide{display: none;}