.page-header {
    background-image: url('/files_upload/huong_dan_su_dung.jpg');
}

@media (max-width: 992px) {
    /*.page-header {*/
    /*    background-image: url('/files_upload/huong_dan_su_dung_992.jpg');*/
    /*}*/
}

@media (max-width: 575px) {
    .page-header {
        background-image: url('/files_upload/huong_dan_su_dung_425.jpg');
    }
}
.bp_news_info {display:none;}