#Download {
    width: 764px;
    height: 268px;
    text-align: center;
    position: absolute;
    top: 397px;
    left: 50%;
    margin-left: -390px;
    z-index: 51;
    border-radius: 5px;
}
#Download .btn_down_s1 {
    float: left;
    width: 88px;
    height: 265px;
    text-indent: -999em;
    margin-left: 119px;
    margin-top: 0;
}
#Download .btn_down_s2 {
    float: left;
    width: 88px;
    height: 265px;
    text-indent: -999em;
    margin-left: 56px;
    margin-top: 0;
}
#Download .btn_down_s3 {
    float: left;
    width: 88px;
    height: 265px;
    text-indent: -999em;
    margin-left: 74px;
    margin-top: 0;
}
#Download .btn_down_s4 {
    float: left;
    width: 88px;
    height: 265px;
    text-indent: -999em;
    overflow: hidden;
    margin-left: 60px;
    margin-top: 0;
}