.promo-product-image {
    margin: 30px auto;
    max-width: 300px;
}

.promo-product-image img {
    width: 100%;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.4);
    background: #fff;
}

@media (max-width: 480px) {
    .promo-product-image {
        max-width: 260px;
    }
}