body{height:100%;background:#fff;position:relative;font-size:.24rem;overflow:hidden}body,img{width:100%}.download-app{height:100vh;overflow:auto}.download-step{position:relative}.button-box{display:flex;justify-content:space-between;padding:.16rem;position:absolute;width:3.75rem;margin:-.85rem auto auto;align-items:center;z-index:3}.button-box img{width:1.62rem}