body{
    background: #0c8ade;
}
.header{
    width: 7.5rem;
    height: 1.2rem;
    background: url('../img/header.jpg') no-repeat center;
    background-size: 100% 100%;
    position: fixed;
    top: 0rem;
    left: 0rem;
    z-index: 1;
}
.content {
    width: 7.5rem;
    height: 35rem;
    background: url('../img/index.jpg') no-repeat center;
    background-size: 100% 100%;
    position: relative;
    margin-top: 1.2rem;
}
.download1 {
    position: absolute;
    top: .28rem;
    right: .25rem;
    width: 2.12rem;
    height: .6rem;
    /* border: 1px solid red; */
}
.download2 {
    position: absolute;
    top: 6.7rem;
    left: 0.95rem;
    width: 5.7rem;
    height: 1.2rem;
    /* border: 1px solid red; */
}
.download3 {
    position: absolute;
    bottom: 2.1rem;
    left: 1.8rem;
    width: 4.12rem;
    height: .88rem;
    /* border: 1px solid red; */
}