@media screen and (max-width:990px) {
    .bj-OspectraSolutionsBanner .nav-menu {
        height: 33%;
    }    
}

@media screen and (max-width:600px) {
    .bj-OspectraSolutionsBanner .nav-menu {
        height: 30%;
    }    
}

@media screen and (max-width:450px) {
    .bj-OspectraSolutionsBanner .nav-menu {
        height: 20%;
    }
}