.affix {
    top: 80px;
    position: static;
    width: 100%;
    z-index: 1;
}

@media (min-width: 992px) {
    .affix {
        position: fixed;
        width: 213px;
    }
}

@media (min-width: 1200px) {
    .affix {
        position: fixed;
        width: 263px;
    }
}