article.homepage-announcement {
    flex: 0 0 25% !important;
    max-width: 25% !important;
}

section.row.homepage-announcements {
    margin-bottom: 40px !important;
}

@media (max-width: 768px) {
    article.homepage-announcement {
        flex: 0 0 50% !important;
        max-width: 50% !important;
    }
}

@media (max-width: 480px) {
    article.homepage-announcement {
        flex: 0 0 100% !important;
        max-width: 100% !important;
    }
}