.page-id-2509 .wpb_single_image a {
    background-color: #000000;
}

.page-id-2509 .wpb_single_image a img {
    -webkit-transition: all 500ms ease;
    -moz-transition: all 500ms ease;
    -o-transition: all 500ms ease;
    transition: all 500ms ease;
    opacity: 1;
}

.page-id-2509 .wpb_single_image a:hover img {
    opacity: 0.7;
}