html,
body{margin:0;padding:0;background-color: #000000;}
button{outline:none}
ul{margin:0;padding:0}ul 
li{list-style:none}
.img-content{position:relative;height:100vh;line-height:0}
.img-box{position:relative;height:calc(100vh - 180px);padding-top:50px}
.img-box .main{position:absolute;left:50%;transform:translateX(-50%);width:90%;margin:0 auto;display:flex;align-items:center;justify-content:center}
.img-box .main>div{max-width:50%}.img-box .main>div 
.til{font-size:48px;font-weight:500;color:#ffffff;margin:0;line-height:1}.img-box .main>div .desc{font-size:20px;margin:20px 0;font-weight:300;color:#dfdef3;line-height:1}
.img-box .img{max-width:50%;max-height:700px}.img-box#nav1{background:url(/image/1.png) no-repeat;background-size:auto 100%;background-position:center;background-color:#000}
.img-box#nav2{background:url(/image/2.png) no-repeat;background-size:auto 100%;background-position:center;background-color:#000}
.img-box#nav3{background:url(/image/b3-c2ca4.min.png) no-repeat;background-size:auto 100%;background-position:center;background-color:#000}.google-btn{z-index:2}.google-btn4{position:absolute;z-index:2;bottom:1.8rem;left:44%}.btn-wrap{width:100%;background-color:#000;box-sizing:border-box;padding:0 0.5rem 0.2rem 0;position:fixed;z-index:99;left:0;line-height:0.5rem;text-align:left;top:0}.btn-wrap .item{text-decoration:none;opacity:0.9;padding:0.06rem 0.2rem;font-size:0.3rem;display:inline-block;font-family:Arial;font-weight:400;color:#fff;cursor:pointer;border-radius:4px}.btn-wrap .item.border{border:1px solid #fff}.btn-wrap .item:hover{opacity:1}.img-content{width:100%;box-sizing:border-box}.img-content .img-cell{width:100%;height:100%}.nav{display:none;background:#fff;position:absolute;padding:0.1rem;width:100%;left:0;top:0.64rem;font-size:0.18rem;border-radius:0.1rem;box-sizing:border-box}.nav li{text-align:left;text-decoration:none;color:#000;cursor:pointer;line-height:0.4rem}.nav .active{color:#ffc925}.border{position:relative}.border:hover .nav{display:block}@media screen and (max-width: 1141px){.btn-wrap .item{font-size:0.2rem;line-height:0.3rem}.img-box{height:auto;padding-top:112px}.img-box .main{position:relative;flex-direction:column;margin:0}.img-box .main>div{max-width:100%;text-align:center;margin:20px 0}.img-box .main>div .til{font-size:30px;font-weight:500;color:#ffffff;margin:0;line-height:1}.img-box .main>div .desc{font-size:20px;margin:20px 0;font-weight:300;color:#dfdef3;line-height:1}.img-box .main>div .google-btn{position:absolute;bottom:10px;left:50%;transform:translateX(-50%)}.img-box .img{max-width:50%;max-height:none}}@media screen and (max-width: 768px){.btn-wrap{padding-right:0;justify-content:space-around;text-align:center}.btn-wrap .item{padding:0.06rem 0.05rem;font-size:0.2rem;line-height:0.3rem}.img-box{height:auto;padding-top:112px}.img-box .main{position:relative;flex-direction:column}.img-box .main>div{text-align:center;margin:20px 0}.img-box .main>div .til{font-size:24px;font-weight:500;color:#ffffff;margin:0;line-height:1}.img-box .main>div .desc{font-size:16px;margin:20px 0;font-weight:300;color:#dfdef3;line-height:1}.img-box .img{max-width:100%;max-height:none}}

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