#structure h1 {
    font-weight: bold!important;
    letter-spacing: 0.4rem;
    margin-bottom: 10rem;
}
#structure h1 span {
    font-size: 1.2rem;
    letter-spacing: 0rem;
}

#structure .head1 {
    font-size: 1.4rem;
    font-weight: bold!important;
    letter-spacing: 0.4rem;
    line-height: 2.4rem;
}

#structure .structure_catch {
    font-size: 2.2rem;
    font-weight: bold;
    text-align: center;
    letter-spacing: 0.6rem;
    margin: 10rem 0;
}

  @media only screen and (max-width: 599px) {

    #structure h1 span {
        display: block;
        font-size: 1rem;
    }
    #structure .structure_catch {
        font-size: 1.8rem;
        letter-spacing: 0.2rem;
    }
  }