@charset "utf-8";body{max-width:750px;margin:0 auto}.main{font-size:0;line-height:0}.main .bottom,.main .top,.middle .bg{width:100%}.middle{position:relative}.middle .btn-group{position:absolute;top:0;left:0;width:100%;display:flex;justify-content:center}.middle .btn-group .btn{height:.89rem;-webkit-animation:breathe 1s infinite;animation:breathe 1s infinite}.middle .btn-group .btn img{height:100%}.btn-gohome{cursor:pointer}.aside-service{position:fixed;top:1.44rem;right:0;width:.56rem;height:2.61rem;background:url(../images/service.png) no-repeat;background-size:cover}@media (min-width:750px){.aside-service{right:50%;margin-right:-375px}}@-webkit-keyframes breathe{from{transform:scale(1)}50%{transform:scale(.9)}to{transform:scale(1)}}@keyframes breathe{from{transform:scale(1)}50%{transform:scale(.9)}to{transform:scale(1)}}