@media (max-width: 768px) {
    .header-banner {
        width: 100% !important;
        margin: 0 0 10px 0 !important;
        margin-top: 0 !important;
        padding: 0 !important;
        max-width: 100% !important;
        box-sizing: border-box;
    }

    .header-banner img {
        width: 100% !important;
        height: auto !important;
        display: block;
    }
}