.add-bnr-3clm{
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    margin-top: 50px;
    gap: 10px;
}

.add-bnr-3clm > img{
    display: block;
    width: 100%;
}

@media screen and (width < 767px) {
    .add-bnr-3clm{
        grid-template-columns: 1fr 1fr;
    }

}