.download{width:100vw;height:100vh;overflow:hidden}.download img.bg{width:100%;height:110%}.download .btn-box{width:100%;height:300px;position:fixed;bottom:-300px;left:0;background:#fff;padding:5vw;font-size:5vw;display:-webkit-box;display:-ms-flexbox;display:flex;-webkit-box-orient:vertical;-webkit-box-direction:normal;-ms-flex-direction:column;flex-direction:column;-webkit-box-align:center;-ms-flex-align:center;align-items:center;border-radius:10vw 10vw 0 0;-webkit-box-shadow:0 -1vw 10vw rgba(0,0,0,.2);box-shadow:0 -1vw 10vw rgba(0,0,0,.2);-webkit-transition:all .12s linear;transition:all .12s linear}.download .btn-box.on{bottom:0}.download .btn-box .btn-download{border:2px solid #ffe7a1;background:-webkit-gradient(linear,left top,left bottom,from(#fad155),to(#f17e23));background:linear-gradient(180deg,#fad155 0,#f17e23);width:68vw;height:14vw;border-radius:7vw;color:#fff;margin-top:6vw}.download .btn-box .btn-download:active{opacity:.8}.download .btn-rongyizn{position:absolute;top:46%;left:50%;-webkit-transform:translateX(-50%);transform:translateX(-50%)}.download .btn-rongyizn .title{text-align:center;font-size:5.595vw}.download .btn-rongyizn .btn-download{width:68vw;height:14vw;border-radius:7vw;color:#fff;margin-bottom:3vw}.download .open-mask{position:fixed;top:0;right:0;z-index:100;width:100vw;height:100vh;background:rgba(0,0,0,.5)}.download .open-mask img{width:100%}