#Download {
    width: 764px;
    height: 172px;
    text-align: center;
    position: absolute;
    top: 770px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 51;
    border-radius: 5px;
    background: url(../image/g-down.png) no-repeat left top;
}
#Download .btn_down_s1 {
    float: left;
    width: 317px;
    height: 89px;
    text-indent: -999em;
    margin-left: 123px;
    margin-top: 43px;
}
#Download .btn_down_s2 {
    float: left;
    width: 155px;
    height: 91px;
    text-indent: -999em;
    margin-left: 3px;
    margin-top: 39px;
}
#Download .btn_down_s3 {
    float: left;
    width: 99px;
    height: 101px;
    text-indent: -999em;
    margin-left: 18px;
    margin-top: 35px;
}
#Download .btn_down_s4 {
    float: left;
    width: 131px;
    height: 89px;
    text-indent: -999em;
    overflow: hidden;
    margin-left: 13px;
    margin-top: 42px;
}