.nb-cart-voucher-box-list {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.nb-cart-voucher-box-list > * {
    flex: 0 0 calc(50% - 10px);
}

@media screen and (max-width: 1699px) {
    .nb-cart-voucher-box-list > * {
        flex: 0 0 100%;
    }
}