#sub_contents .gallery02.add-img2510 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-areas:
        "A B"
        "C D";
    gap: 10px;
}
@media screen and (min-width: 1024px) {
    #sub_contents .gallery02.add-img2510 {
        display: grid;
        grid-template-columns: 1fr 1fr 1fr 1fr 1fr;
        grid-template-areas: "A B C D E";
        gap: 15px;
    }