@tab-hover-background :rgba (0,0,0,.1);.btn-totop{position:fixed;width:50px;height:50px;bottom:20px;border-radius:100%;right:40px;z-index:10;display:none;opacity:0;background:#7f7f7f80;transition:ease .3s background;cursor:pointer}.btn-totop svg{fill:#fff}.btn-totop:hover{background:#cccccc80}.btn-totop:active{background:#7f7f7f40}.btn-totop.show{opacity:1}@media only screen and (max-width:1024px){.btn-totop{right:32px}}@media only screen and (max-width:768px){.btn-totop{display:none!important}}body{background:url(/img/bg.jpg) top center no-repeat #f4f8fc}.item-wrapper{width:25%;padding:0 10px 20px;box-sizing:border-box}.download-title{font-size:40px;text-align:center;color:#09090a;font-weight:700;margin-bottom:16px;padding-top:144px}.download-title--bg{background:url(/img/bg_title4.png) bottom 3px center no-repeat;background-size:auto 48px}.download-tips{margin-bottom:80px;font-size:20px;text-align:center;color:#2f2f30bf}.download-list{width:100%;max-width:1200px;margin:0 auto;flex-wrap:wrap;padding:0 40px 120px;box-sizing:border-box}.download-item{padding:50px 10px 30px;box-sizing:border-box;box-shadow:0 4px 12px #0000000f;background:#fff;border-radius:12px;flex-direction:column;color:#2f2f30bf;text-align:center;font-size:16px}.download-item:hover .download-item__icon,.download-item:hover .download-item__desc{opacity:0}.download-item:hover .download-item__icon{transform:scale(0)}.download-item:hover .download-item__icon--hover{transform:scale(1)}.download-item:hover .download-item__icon--hover,.download-item:hover .download-item__desc--hover{opacity:1}.download-item:active .download-item__icon--hover svg{fill:#2f2f3040}.download-item.open-beta{position:relative}.download-item.open-beta:after{content:"";width:72px;height:30px;background-size:auto 100%;background-repeat:no-repeat;background-image:url(/img/open_beta.png);position:absolute;top:0;left:0}.download-item__img{width:100%;height:100px;margin-bottom:28px;position:relative}.download-item__icon{width:80px;height:80px;transition:ease all .2s}.download-item__icon--hover{position:absolute;left:50%;top:50%;margin-top:-50px;margin-left:-50px;width:100px;height:100px;opacity:0;aspect-ratio:1;transition:ease all .2s;transform:scale(0)}.download-item__icon--hover svg{width:80px;height:80px;fill:#292929}.download-item__icon--qrcode{width:100px;height:100px;position:relative}.download-item__icon--qrcode:after{content:"";position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);background:url(/img/ico.png) no-repeat center;background-size:100% auto;width:22px;height:22px}.download-item__icon--qrcode img{width:100%;aspect-ratio:1}.download-item__title{font-size:20px;color:#09090a;font-weight:500}.download-item__content{height:102px;flex-direction:column;position:relative}.download-item__os{margin-bottom:12px}.download-item__desc{transition:ease opacity .3s}.download-item__desc--hover{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);opacity:0;transition:ease opacity .3s}.download-item__tips{white-space:nowrap;margin-bottom:8px}.download-item__date{margin-top:24px;font-size:12px;color:#2f2f3080;white-space:nowrap}@media only screen and (max-width:1280px){.download-item{padding-top:30px;padding-bottom:20px}}@media only screen and (max-width:1024px){.item-wrapper{width:33.333%;padding:0 7px 14px}.download-list{padding-left:32px;padding-right:32px}}@media only screen and (max-width:768px){.item-wrapper{width:50%;padding:0 6px 12px}.download-title{font-size:28px}.download-title--bg{background-position:bottom 8px center;background-size:auto 28px}.download-tips{font-size:16px}.download-list{padding-left:10px;padding-right:10px;justify-content:flex-start}.download-item__img{margin-bottom:20px;height:80px}.download-item__icon{width:60px;height:60px}.download-item__icon--hover{width:80px;height:80px;margin-top:-40px;margin-left:-40px}.download-item__icon--qrcode{width:80px;height:80px}.download-item__title{font-size:16px}.download-item__content{height:80px}.download-item__os{margin-bottom:12px}.download-item__tips{margin-bottom:4px}.download-item__date{margin-top:12px}.download-item.open-beta{position:relative}.download-item.open-beta:after{height:24px}}