#timeline
{
    background-color: rgba(227,228,229,.4);
}
#timeline .timeline-item img
{
    display: block;
    width: 250px;
    max-width: 50%;
    height: auto;
    border-radius: 100%;
}
@media(max-width: 768px)
{
    #timeline .timeline-item img
    {
        margin: 20px auto 10px;
    }
}