.related-products {
  display: block;
}

.related-products__heading,.product_page_heading {
  margin: 0 0 2.4rem;
  font-size:clamp(3rem, 1.5rem + 2vw, 3.5rem) ;
}
@media(max-width:749px){
  .related-products__heading,.product_page_heading {
    margin: 0 0 1.5rem;
  }  
}