.service-block .link-block h4{
  font-size: 32px;
}
@media (max-width:991px) {
  .service-block .link-block h4{
    font-size: 24px;
  }
}
@media (max-width:767px) {
  .service-block .link-block h4{
    font-size: 20px;
  }
}