.title_area {
  display: flex;
  align-items: center;
  justify-content: center;
}

.title_area h1 {
  color: #FFFFFF;
}

#about_contents h2 {
  text-align: center;
}

@media screen and (min-width: 768px) {
  h1 {
    font-weight: bold;
  }
  .title_area {
    font-size: 30px;
    background: url(../image/company_mv_pc.jpg) no-repeat;
    height: 17.86vw;
    min-height: 250px;
    background-size: cover;
  }
  #about_contents {
    padding: 85px 0 100px;
    width: 800px;
    margin: 0 auto;
    text-align: center;
  }
  #about_contents h2 {
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 40px;
  }
  #about_contents h2#relatedcompany {
    margin-top: 100px;
  }
  #about_contents .description {
    margin-top: 35px;
    display: inline-block;
    line-height: 1.53;
    text-align: center;
  }
  #about_contents .greeting {
    padding: 45px 50px;
    background: url(../image/top_intro_bg.png);
    background-size: 32px 32px;
  }
  #about_contents .greeting h3 {
    font-size: 19px;
    font-weight: bold;
    margin-top: 30px;
  }
  #about_contents .greeting p {
    text-align: left;
    margin-top: 20px;
    line-height: 1.6;
  }
  #about_contents .greeting p.greeting_sign {
    text-align: right;
    margin-top: 30px;
  }
  #about_contents table {
    width: 100%;
    margin: 50px auto 0;
    border-top: 2px solid #b09d9d;
  }
  #about_contents table th {
    border-bottom: 1px solid #b09d9d;
    text-align: left;
    padding: 15px 25px 13px 40px;
    width: 120px;
    line-height: 1.5;
    font-weight: bold;
  }
  #about_contents table td {
    text-align: left;
    border-bottom: 1px solid #b09d9d;
    padding: 15px 25px 13px 25px;
    line-height: 1.5;
    font-weight: normal;
  }
}

@media screen and (max-width: 767.999px) {
  .title_area {
    font-size: 20px;
    background: url(../image/company_mv_sp.jpg) no-repeat;
    height: 33.33vw;
    min-height: 125px;
    background-size: cover;
  }
  #about_contents {
    padding: 50px 27px 60px;
  }
  #about_contents h2 {
    font-size: 17px;
    line-height: 1.25;
    font-weight: bold;
    margin-bottom: 20px;
  }
  #about_contents h2#relatedcompany {
    margin-top: 50px;
  }
  #about_contents .description {
    margin-top: 18px;
    padding: 0 10px;
    text-align: center;
    line-height: 1.43;
  }
  #about_contents .greeting {
    padding: 35px 30px;
    background: url(../image/top_intro_bg.png);
    background-size: 16px 16px;
  }
  #about_contents .greeting h3 {
    font-size: 15px;
    font-weight: bold;
    text-align: center;
    margin-top: 15px;
  }
  #about_contents .greeting p {
    text-align: left;
    margin-top: 15px;
    line-height: 1.7;
  }
  #about_contents .greeting p.greeting_sign {
    text-align: right;
    margin-top: 25px;
  }
  #about_contents table {
    margin-top: 27px;
    width: 100%;
    display: block;
    border-top: 2px solid #b09d9d;
  }
  #about_contents table tr, #about_contents table th, #about_contents table td, #about_contents table tbody {
    display: block;
    width: 100%;
    text-align: left;
    box-sizing: border-box;
    font-weight: normal;
  }
  #about_contents table th {
    padding: 12px 8px 0;
    font-weight: bold;
  }
  #about_contents table td {
    margin-top: 9px;
    padding: 0 8px 8px;
    border-bottom: 1px solid #b09d9d;
    line-height: 1.5;
    font-weight: normal;
  }
}