.mb-startseite-partner .swiper-wrapper img {
    width: 150px;
    height: auto!important;
    -webkit-filter: grayscale(1);
    filter: grayscale(1);
    opacity: 0.3;
}

.mb-startseite-partner .swiper-wrapper img:hover {
    -webkit-filter: grayscale(0);
    filter: grayscale(0);
    opacity: 1;
    transition: opacity 0.5s ease;
}