.carousel-inner .item {
    opacity: 0;
    transition-property: opacity;
    -webkit-transition: 0.75s ease-in-out opacity;
    -moz-transition: 0.75s ease-in-out opacity;
    -ms-transition: 0.75s ease-in-out opacity;
    -o-transition: 0.75s ease-in-out opacity;
    transition: 0.75s ease-in-out opacity;
    left: 0 !important;
}

.carousel-inner .active {
    opacity: 1;
}

.carousel-inner .active.left,
.carousel-inner .active.right {
    opacity: 0;
    z-index: 2;
}

.carousel-inner .next.left,
.carousel-inner .prev.right {
    opacity: 1;
    z-index: 1;
}