.header-top {
    height: 250px;
    overflow: hidden;
    margin-bottom: 110px;
    background-color: #000000;
    background-image: url(../images/headers/thumbnail.png);
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover;
    background-attachment: initial;
    z-index: 1;
}

.header-top h2 {
    color: #fff;
    position: absolute;
    z-index: 2;
    top: 250px;
}

.header-top .container-opacity {
    height: 100%;
    width: 100%;
    opacity: 0.4;
    background-color: #000000;
}

.img-fluid {
    max-width: 100%;
    height: auto;
}