.col-3 img {
    height: 25vh;
}
.mo .col-3 img {
    height: 30vh;
}
.col-4 img {
    height: 35vh;
}
.col-6 img {
    height: 65vh;
}
@media screen and (max-width: 600px) {
    .col-3 img {
    height: 15vh;
    }
    .mo .col-3 img {
        height: 16vh;
    }
    .col-4 img {
        height: 18vh;
    }
    .col-6 img {
        height: 38vh;
    }
}