#certify {
    position: relative;
    width: 800px;
    margin: 0 auto;
}

#certify .swiper-slide {
    width: 400px;
    height: 865px;
    text-align: center;
    background: transparent;
}

#certify .swiper-slide img {
    display: block;
    width: 340px;
    height: 735px;
}

#certify .swiper-slide-next {
    background: #fff;
}

#certify .swiper-slide-prev {
    background: #fff;
}

#certify .swiper-slide-next img {
    opacity: 0.3 !important;
}

#certify .swiper-slide-prev img {
    opacity: 0.3 !important;
}

#certify .swiper-slide img {
    opacity: 0.3;
}

#certify .swiper-slide-active img {
    opacity: 1 !important;
}