.img-rang {
    width: 100%
    margin: auto;
    overflow-x: auto;
}

.img-rang img {
    max-width: 780px;
    height: auto;
}

@media only screen and (min-width: 993px) {
    .img-rang img {
        max-width: 100%;
        height: auto;
    }
}

.tabs .tab {
    text-transform: none;
}