.instagram {
    width: 760px;
    margin: 0;
    padding: 0;
}

    .instagram li {
        margin: 0;
        float: left;
        width: 380px;
        height: 380px;
        overflow: hidden;
        position: relative;
    }

        .instagram li img {
            width: 380px;
            height: 380px;
            object-fit: cover;
        }
@media screen and (max-width: 760px) {

}