.promotion-banner{
    background-image: url('../images/event_promo.jpg');
    background-size: contain;
    background-position: bottom;
    background-repeat: no-repeat;
    width: 100%;
    height: 100%;
}

.promotion-detail-img{
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    width: 100%;
    height: 100%;
}