img.lazy {
    opacity: 0;
    transition: 0.5s;
}
img.lazy.loaded {
    opacity: 1;
}
.main-banner .owl-carousel .owl-item {
    background-color: rgba(0,0,0,0.1);
}

.main-banner .owl-carousel .banner-image-desktop {
    display: block;
}
.main-banner .owl-carousel .banner-image-mobile {
    display: none;
}

@media(max-width: 600px) {
    .main-banner .owl-carousel .banner-image-desktop {
        display: none;
    }
    .main-banner .owl-carousel .banner-image-mobile {
        display: block;
    }
}