.divSobre{
    justify-content: space-between;
}
.btn-sobre{
    background:#a6a6a6;
    border-radius: 0px;
    width: 280px;
}
@media screen and (max-width: 991px) {
    .divSobre{
        flex-direction: column;
        justify-content: center;
        align-items: center;
    }
}