div.promotional-banner {
    display: block;
}

#q_skinny_banner img,
#q_skinny_banner_mobile img {
    width: 100%;
    margin: 6px 0;
}

/* ===== mobile ===== */

@media (max-width: 767px) {
    #q_skinny_banner {
        display: none;
    }
}

/* ===== desktop ===== */

@media (min-width: 768px) {
    #q_skinny_banner_mobile {
        display: none;
    }
}