.syncer-custom-product-fields > div + div {
    margin-bottom: var(--syncer-custom-field-spacing, 0);
}
.syncer-custom-product-fields > div + div .check:last-of-type {
    margin-bottom: 0;
}
.syncer-custom-product-fields > div + div .check:not(:last-of-type) {
    margin-bottom: 10px;
}