.img-hover {
    opacity: 0;
    transition: opacity .3s ease;
}

.img-hover:hover {
    opacity: 1;
}

.t1186__gallery{
    z-index:1;
}

.back-image{
    z-index:0 !important;
}

.hover-z{
    z-index:9 !important;
}

.hover-z-u{
    z-index:10 !important;
}