@charset "UTF-8";
#USB31 {
    background: url("../images/usb_1920.jpg") center center no-repeat;
    height: 766px;
}

#USB31 div {
    position: absolute;
    left: 182px;
    top: 114px;
    width: 890px;
    height: 247px;
}

@media screen and (max-width: 1366px) {
    #USB31 {
        background: url("../images/usb_1366.jpg") center -10px no-repeat;
        height: 575px;
    }
    #USB31 div {
        left: 56px;
        top: 93px;
        width: 768px;
        height: 156px;
    }
}

@media screen and (max-width: 960px) {
    #USB31 {
        background: url("../images/usb_960.jpg") center center no-repeat;
        height: 700px;
    }
    #USB31 div {
        left: 4px;
        top: 48px;
        width: 614px;
        height: 177px;
    }
}

@media screen and (max-width: 640px) {
    #USB31 {
        background: url(../images/usb_640.jpg) center 100px no-repeat;
        height: 640px;
    }
}