@media (max-width: 767px) {
  .sp_only {
    display: block;
  }
  .pc_only {
    display: none;
  }
  body h2 {
    font-size: 2rem;
  }
  body p {
    font-size: 1.6rem;
    line-height: 1.6;
  }
  .cdSec .redArea {
    margin: 0 4.6%;
  }
  .cdSec .redArea .arrow {
    width: 90%;
  }
  .cdSec .redArea .redBtn {
    width: 90%;
  }
  .cdSec .btnHaikei .firstBtn {
    top: 70%;
    left: 8%;
    width: 85%;
  }
  .sec11 .window .YouTube {
    width: 80%;
  }
  .sec11 .window .comment {
    width: 90%;
  }
}