.swiper-slide.bg-overlay-500:before {
    background: rgba(30, 34, 40, 0.5);
}

.swiper-slide.bg-overlay-600:before {
    background: rgba(30, 34, 40, 0.6);
}

.swiper-slide.bg-overlay-700:before {
    background: rgba(30, 34, 40, 0.7);
}

.swiper-slide.bg-overlay-800:before {
    background: rgba(30, 34, 40, 0.8);
}

.swiper-slide.bg-overlay-900:before {
    background: rgba(30, 34, 40, 0.9);
}