ul{list-style: none;}

.banner{position: relative;overflow: hidden;z-index: 1;}

.img{position: absolute;top: 0;left: 0;display: flex;margin: 0;}

.des{position: absolute;bottom: 0;left: 0;z-index: -2;background: #ccc}

.des li{float: left;width: 600px;}

.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: 40px;color: #fff;font-size: 40px;line-height: 100px;text-align: center;cursor:pointer;}

.btn .prev{position: absolute;left: .2rem;top: 50%;margin-top: -0.2rem;}

.btn .next{position: absolute;right: .2rem;top: 50%;margin-top: -0.2rem;}

.num .active{background-color: #fff;}

.hide{display: none;}

.banner .btn img{width: .2rem;height: .3rem;opacity: 0.6;}