@media screen and (max-width: 390px) {
  h1, h2, .heading {
    font-size: 2.2rem !important;
  }
  
  #shopify-section-sections--26626845671716__footer h1,
  #shopify-section-sections--26626845671716__footer h2,
  #shopify-section-sections--26626845671716__footer .heading {
    font-size: unset !important;
  }
}