ul.product_promotion_list li.item .content-left-side {
    font-size: 14px;
}

@media (max-width: 767px) {
    ul.product_promotion_list li.item .content-left-side {
        width: 100% !important;
        display: block !important;
    }

    ul.product_promotion_list li.item .content-right-side {
        width: 100% !important;
        display: block !important;
        text-align: center !important;
    }
}