.indexPage{
    background: url(./images/index.jpg) top center no-repeat;
    background-size: cover;
    width: 100%;
    height:113.64rem;
    position: relative;
}

.header {
    width: 94%;
    text-align: left;
    margin: 0 auto;
    padding-top: 3%;
}

.header img {
    width:3.13rem;
    height:1.1rem;
}

.main {
    position: absolute;
    bottom: 5%;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    text-align: center;
    z-index: 1;
}

.main a{
    display: inline-block;
    width: 3.16rem;
    height: 0.85rem;
    background: url(./images/back-btn.png) top center no-repeat;
    background-size: cover;
}


.medium .indexPage{
    height:94.7rem;
}
.medium .header img{
    width:2.6rem;
    height:0.92rem;
}

.medium .main a{
    width:2.63rem;
    height:0.7rem;
}

.small .indexPage{
    height:68.45rem;
}
.small .header img{
    width:1.88rem;
    height:0.66rem;
}

.small .main a{
    width:1.9rem;
    height:0.51rem;
}