#twenty-anniv-introduction {
  margin-bottom: 12rem;
}
#twenty-anniv-introduction .introduction-title {
  font-weight: 700;
  font-style: Bold;
  font-size: 4rem;
  line-height: 4.5rem;
  text-align: center;
  margin-bottom: 4.2rem;
}
#twenty-anniv-introduction p {
  font-weight: 500;
  font-size: 1.8rem;
  line-height: 3.6rem;
}

/* =========================
SP
========================= */
@media (max-width: 768px) {
  #twenty-anniv-introduction {
    margin-bottom: 6rem;
  }
  #twenty-anniv-introduction .introduction-title {
    font-size: 2.2rem;
    line-height: 4rem;
    margin-bottom: 2.2rem;
  }
  #twenty-anniv-introduction p {
    font-size: 1.4rem;
    line-height: 2.8rem;
  }
}