@charset "UTF-8";
#USB31 {
    background: url("../images/usb_1920.jpg") center center no-repeat;
    height: 776px;
}

#USB31 .frame {
    position: absolute;
    left: 182px;
    top: 164px;
    width: 890px;
    height: 247px;
}

@media screen and (max-width: 1366px) {
    #USB31 {
        background: url("../images/usb_1366.jpg") center 0 no-repeat;
        height: 575px;
    }
    #USB31 .frame {
        left: 96px;
        top: 93px;
        width: 768px;
        height: 156px;
    }
}

@media screen and (max-width: 960px) {
    #USB31 {
        background: url("../images/usb_960.jpg") center bottom no-repeat;
        height: 660px;
    }
    #USB31 .frame {
        left: 40px;
        top: 67px;
        width: 540px;
    }
}

@media screen and (max-width: 640px) {
    #USB31 {
        background: url("../images/usb_640.jpg") center 220px no-repeat;
        height: 720px;
    }
    #USB31 .frame {
        padding-top: 60px;
    }
}