*{margin:0;padding:0}body{width:100%;min-height:100vh}img{display:block}.img img{width:100%;height:100%;object-fit:cover}.show{display:block !important}.page{position:relative;width:7.5rem;margin:0 auto}.page .btn{position:absolute;width:5.6rem;height:.8rem;cursor:pointer;left:.95rem}.page .btn::before{content:'';display:block;position:absolute;top:0;left:0;width:100%;height:100%;background-image:url(../c2.png);background-repeat:no-repeat;background-position:center;background-size:contain}.page .btn::after{content:'';display:none;position:absolute;top:0;left:0;width:100%;height:100%;background-image:url(../c0_iSpt.png);background-repeat:no-repeat;background-position:center;background-size:contain}.page .btn1{top:32.62rem}.page .btn2{top:41.31rem}.page .btn3{top:52.2rem}.page .btn4{top:58.22rem}.page .btn.cur::before{display:none}.page .btn.cur::after{display:block}