.main-big-banner {
    width: 100%;
    height: 432px;
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
    border-radius: 8px;
    float: left;
}

@media (max-width: 576.5px) {
    .main-big-banner {
        height: 154px;
        border-radius: 4px;
    }
}