#gallery-2 {
    margin: auto;
}

#gallery-2 .gallery-item {
    float: left;
    margin-top: 10px;
    text-align: center;
    width: 33%;
}
@media only screen and (max-width: 767px) {
    #gallery-2 .gallery-item {
        width: 100%;
    }
}
#gallery-2
img {
    border: 2px solid #cfcfcf;
}

#gallery-2 .gallery-caption {
    margin-left: 0;
}