#ssd {
    background-image: url(../images/ssd_1920.jpg);
    height: 810px;
    background-position: center -81px;
}

@media screen and (max-width: 1366px) {
    #ssd {
        background-image: url(../images/ssd_1366.jpg);
        height: 604px;
    }
}

@media screen and (max-width: 960px) {
    #ssd {
        background-image: url(../images/ssd_960.jpg);
        height: 510px;
    }
}

@media screen and (max-width: 640px) {
    #ssd {
        background-image: url(../images/ssd_640.jpg);
        height: 827px;
        background-position: center -93px;
    }
}