main div.jumbotron {
    padding-top: 100px !important;
    margin-bottom: 0 !important;
}

.mainjumbotron {
    background: url("../images/background/index_bg.jpg") top center;
}

@media only screen and (max-width: 990px) {
    main div.jumbotron {
        padding-top: 80px !important;
        margin-bottom: 0 !important;
    }
}