#Download {
    width: 821px;
    height: 81px;
    text-align: center;
    position: absolute;
    top: 860px;
    left: 50.5%;
    transform: translateX(-50%);
    z-index: 51;
    border-radius: 5px;
}
#Download .btn_down_s1 {
    float: left;
    width: 341px;
    height: 81px;
    text-indent: -999em;
    margin-right: 0px;
    background: url(../image/btn_down_1.png) no-repeat left top;
}
#Download .btn_down_s2 {
    float: left;
    width: 341px;
    height: 81px;
    text-indent: -999em;
    margin-left: 121px;
    background: url(../image/btn_down_2.png) no-repeat left top;
}
#Download .btn_down_s1:hover {
    background: url(../image/btn_down_1_hover.png) no-repeat left top;
}
#Download .btn_down_s2:hover {
    background: url(../image/btn_down_2_hover.png) no-repeat left top;
}