.group-big li a {
            display: block;
        }

        .group-big li a .pic {
            padding-top: 66%;
            display: block;
            position: relative;
            overflow: hidden;
        }

        .group-big li a .pic img {
            position: absolute;
            left: 0;
            top: 0;
            width: 100%;
            height: 100%;
            transition: all 0.3s;
        }

        .group-big li a img {
            display: block;
            width: 100%;
        }

        .group-big .slick-prev,
        .group-big .slick-next {
            width: 55px;
            height: 55px;
        }

        .group-big .slick-prev {
            background: url(../images/group-l.png) no-repeat;
            background-size: 100% 100%;
            left: 10px;
        }

        .group-big .slick-next {
            background: url(../images/group-r.png) no-repeat;
            background-size: 100% 100%;
            right: 10px;
        }

        .group-sml {
            margin-top: 20px;
        }

        .group-sml li.slick-current.slick-active a {
            border: 3px solid #115db0;
            padding: 2px;
        }

        .group-sml li a {
            display: block;
            border: 3px solid transparent;
            padding: 2px;
        }

        .group-sml li a .pic {
            padding-top: 66%;
            display: block;
            position: relative;
            overflow: hidden;
        }

        .group-sml li a img {
            position: absolute;
            left: 0;
            top: 0;
            width: 100%;
            height: 100%;
            transition: all 0.3s;
        }



        @media (max-width:1024px) {

            .group-big .slick-prev,
            .group-big .slick-next {
                width: 30px;
                height: 30px;
            }
        }