.topB{font-size:20px;font-family:PingFang SC;font-weight:400;line-height:50px;color:#fff;opacity:1;width:860px;height:50px;background:rgba(0,0,0,.39);box-shadow:0 5px 10px rgba(0,0,0,.1);position:absolute;z-index:10;margin-left:30px}li,ul{list-style-type:none;padding:0;margin:0}.span{float:right;margin-right:20px}.check-container:hover .btn-left{left:50px;opacity:1}.check-container:hover .btn-right{right:-875px;opacity:1}.check-container{width:880px;box-sizing:border-box;position:relative}.check-container ul{width:860px;overflow:hidden;margin-left:30px;height:500px;position:relative}.check-container ul li{height:100%;width:100%;position:absolute}.check-container ul li img{width:100%;height:auto;margin:0 auto}.sBtn{position:absolute;right:20px;bottom:50px}.sBtn div{width:40px;height:40px;background-color:#00b694;box-shadow:0 0 6px rgba(0,0,0,.1);border-radius:5px;margin-bottom:10px;line-height:40px;font-size:24px;color:#fff;text-align:center;font-weight:700;cursor:pointer}.yBtn{top:calc(50% - 18px)}.yBtn,.yBtn div{position:absolute}.yBtn div{width:36px;height:36px;background:rgba(0,0,0,.5);border-radius:50%;font-size:12px;color:#fff;font-weight:700;text-align:center;cursor:pointer;line-height:36px;transition:all .5s}.btn-left{left:0;opacity:0}.btn-right{right:-925px;opacity:0}