.cooperation-case{
    height: 450px;
    /* height: 200px; */
    margin-top: 40px;
    text-align:center
}
.cooperation-case .swiper-pagination-bullet {
    width: 55px;
    height: 10px;
    background-color: #BBBBBB;
    border-radius: 0;
}
.cooperation-case .swiper-pagination-bullet-active {
    background-color: #FF0000;
}