.heading-1 p:last-of-type {
    margin-bottom: 0px;
}
.heading-1 p.sub-heading {
    margin-bottom: 20px;
}
/* if .heading-1 has .content-13 after it... */
.heading-1:has(+ .content-13) .custom_padding {
    padding-bottom: 0 !important;
}