.onair_catch {
  margin: 50px auto 60px;
  text-align: center;
  font-size: 1.7rem;
  font-feature-settings: 'palt';
  font-weight: 600;
  line-height: 1.4;
  position: relative;
}

.onair_catch::first-line {
  font-size: 2.1rem;
}

@media screen and (min-width: 900px){
  .onair_catch {
    max-width: 250px;
  }
}