@media screen and (max-width: 600px) {

    .o-history .slick-prev {
        height: 35px;
        left: -38px;
        width: 35px;
    }

    .o-history .slick-next {
        height: 35px;
        right: -30px;
        width: 35px;
    }

    .o-history .slick-prev:before {
        height: 35px;
        width: 35px;
    }

    .o-history .slick-next:before {
        height: 35px;
        width: 35px;
    }

    .o-history__box {
        margin: 0 8px;
    }
}