/*default*/
.banner {
    background-image: url(https://cdn.lmcu.org/images/lmcu-top-level-business-banner-2017-04-25_22-05-13_979826.jpg);
}
/*large*/
@media(max-width: 1280px) {
    .banner {
        background-image: url(https://cdn.lmcu.org/images/lmcu-top-level-business-banner-2017-04-25_22-05-13_979826-1278x627.jpg);
    }
}
/*medium*/
@media(max-width: 991px) {
    .banner {
        background-image: url(https://cdn.lmcu.org/images/lmcu-top-level-business-banner-2017-04-25_22-05-13_979826-989x485.jpg);
    }
}
/*small*/
@media(max-width: 767px) {
    .banner {
        background-image: url(https://cdn.lmcu.org/images/lmcu-top-level-business-banner-2017-04-25_22-05-13_979826-764x375.jpg);
    }
}
/*tiny*/
@media(max-width: 480px) {
    .banner {
        background-image: url(https://cdn.lmcu.org/images/lmcu-top-level-business-banner-2017-04-25_22-05-13_979826-480x236.jpg);
    }
}