body{bottom:0;left:0;position:absolute;right:0;top:0}.header{padding:.5rem}.swiper-slide{position:relative}.btn-con{bottom:3.125rem}.btn-con,#app{position:absolute;width:100%}.swiper-slide .txt{left:0;position:absolute;top:50%}#app{background:url(https://p3.ssl.qhimg.com/t01c52a47401280d291.png);background-size:contain;background-repeat:no-repeat;background-position:0;height:100%}