@media(max-width: 540px) {
  section.faq .col-12.col-md-12.col-sm-4{
   padding:0; 
  }
  section.faq .accordion-flush .accordion-item .accordion-button, section.faq .accordion-flush .accordion-item .accordion-button.collapsed{
    font-size: 16px;
    padding-right: 40px;
  }
  section.faq .list-faq{
    font-size: 20px;
  }
}