.intro-right {
    position: relative;
    width: 100%;
    height: 584px;
    overflow: hidden;
}

.intro-right img {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    opacity: 0;
    transition: opacity 1s ease-in-out;
    z-index: 1;
}

.intro-right img.active {
    opacity: 1;
    z-index: 2;
}

.no-js .intro-right img {
    opacity: 1;
}