#Download {
    width: 795px;
    height: 172px;
    text-align: center;
    position: absolute;
    top: 869px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 51;
    border-radius: 5px;
    background: url(../images/down.png) no-repeat left top !important;
}
#Download .btn_down_s1 {
    float: left;
    width: 259px;
    height: 89px;
    text-indent: -999em;
    margin-left: 106px;
    margin-top: 43px;
}

#Download .btn_down_s2 {
    float: left;
    width: 181px;
    height: 91px;
    text-indent: -999em;
    margin-left: 4px;
    margin-top: 39px;
}

#Download .btn_down_s3 {
    float: left;
    width: 181px;
    height: 101px;
    text-indent: -999em;
    margin-left: 4px;
    margin-top: 35px;
}