@charset "UTF-8";
#USB31 {
    background: url("../images/usb_1920.jpg") center 0 no-repeat;
    height: 1023px;
    padding-top: 150px;
}

#USB31 .frame,
#USB31 .hdmi {
    width: 1020px;
    margin: 0 auto;
}

#USB31 .hdmi {
    margin-top: 100px;
}

#USB31 h2,
#USB31 h3,
#USB31 h4 {
    text-align: center;
}

@media screen and (max-width: 1366px) {
    #USB31 {
        background-image: url("../images/usb_1366.jpg");
        height: 807px;
        padding-top: 160px;
    }
    #USB31 .frame,
    #USB31 .hdmi {
        width: 770px;
    }
}

@media screen and (max-width: 960px) {
    #USB31 {
        background-image: url("../images/usb_960.jpg");
        height: auto;
        padding-top: 210px;
        padding-bottom: 80px;
    }
    #USB31 .frame,
    #USB31 .hdmi {
        width: 372px;
    }
    #USB31 .hdmi {
        margin-top: 80px;
    }
    #USB31 h2,
    #USB31 h3,
    #USB31 h4 {
        text-align: left;
    }
}

@media screen and (max-width: 640px) {
    #USB31 {
        background-image: url(../images/usb_640.jpg);
        padding-top: 10px;
        padding-bottom: 60px;
    }
    #USB31 .frame,
    #USB31 .hdmi {}
    #USB31 .hdmi {
        margin-top: 60px;
    }
}