.side_banner {
    position: sticky;
    top: -40px;
    margin: 0 auto;
    width: 1200px;
    z-index: 2;
}

.side_banner .banner_area {
    position: absolute;
    top: 66px;
    left: -140px;        
}

.side_banner .banner_area .banner_box {
    width: 120px;
    height: 600px;
    display: block;
}

.side_banner .banner_area .banner_box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.side_banner .banner_area.type_right {
    position: absolute;
    top: 66px;
    left: unset;
    right: -140px;
}