.fast_navs {
    margin-bottom: 31px;
}

.fast_nav {
    position: relative;
    display: block;
    overflow: hidden;
    margin-bottom: 30px;
}
.fast_nav img {
    width: 100%;
}
.fast_nav h4 {
    position: absolute;
    width: 100%;
    bottom: 33px;
    font-weight: 400;
    font-size: 42px;
    text-align: center;
    color:#FFF;
    text-shadow: 2px 2px 7px #868686;
}
@media (min-width: 991px) {
    .fast_nav:before,
    .fast_nav:after {
        content: '';
        display: block;
        position: absolute;
        width: 100%;
        left: 0;
        background: rgba(0, 0, 0, 0.3);
        -webkit-transition: all 0.7s ease-in-out;
             -o-transition: all 0.7s ease-in-out;
                transition: all 0.7s ease-in-out;
    }
    .fast_nav:before {bottom: 50%; top: 50%;}
    .fast_nav:after {top: 50%; bottom: 50%;}
    .fast_nav:hover:before {
        top: 0;
    }
    .fast_nav:hover:after {
        bottom: 0;
    }
    .fast_nav h4 {
        -webkit-transition: all 0.5s ease-in-out;
             -o-transition: all 0.5s ease-in-out;
                transition: all 0.5s ease-in-out;
    }
    .fast_nav:hover h4 {
        bottom: 50%;
        z-index: 2;
        color: #fff;
        -webkit-transform: translateY(50%);
             -o-transform: translateY(50%);
                transform: translateY(50%);
    }
}

@media (max-width: 991px) and (min-width: 768px) {
    .fast_nav h4 {font-size: 28px;}
    .fast_nav {margin-bottom: 17px;}
}

@media (max-width: 767px) {
    .fast_nav {
        max-width: 480px;
        margin-left: auto;
        margin-right: auto;
    }
}