@media (max-width: 750px) {
  html {
    font-size: 16px;
  }

  .page1 {
    width: 100%;
    height: 24.8125rem;
    background-image: url('../img/phone/about.png');
    background-size: 100% 100%;
  }

  .txt1 {
    font-size: 1.875rem;
    font-weight: bold;
    color: #333333;
    line-height: 2.8125rem;
    text-align: center;
    margin-top: 6.8125rem;
  }

  .txt2 {
    font-size: 0.8125rem;
    font-weight: 400;
    color: #666666;
    line-height: 1.25rem;
    text-align: center;
    margin-top: 0.375rem;
  }

  .title-10 {
    width: 10.125rem;
    display: block;
    margin: 1.5625rem auto 0.9375rem;
  }

  .about-card {
    display: flex;
    padding-left: 1.4375rem;
    align-items: center;
    padding: 1rem 0;
    margin: 0 1rem;
    border-bottom: 1px solid #DEDEDE;
  }

  .about-card img {
    width: 2.5rem;
    height: 2.5rem;
    margin-right: 0.5625rem;
  }

  .about-card-title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: #333333;
    line-height: 1.4375rem;
  }

  .about-card-title.about-phone-card-title {
    font-size: 0.8125rem !important;
    font-weight: 400 !important;
    color: #666666 !important;
    line-height: 0.75rem !important;
    margin-bottom: 0.25rem;
  }

  .w1197h419 {
    width: 21.875rem;
    display: block;
    margin: 1.25rem auto 1.5625rem;
  }
}

@media (min-width: 750px) {
  .page1 {
    width: 100%;
    height: 700px;
    background-image: url('../img/image/about.png');
    background-size: 100% 100%;
  }

  .title-10 {
    width: 213px;
    display: block;
    margin: 106px auto 0;
  }

  .about-box {
    margin-top: 46px;
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  .about-card {
    text-align: center;
    flex: 1;
  }

  .about-card img {
    width: 64px;
    height: 64px;
    margin-bottom: 20px;
  }

  .about-card-title {
    font-size: 16px;
    margin-bottom: 7px;
    font-weight: 600;
    color: #333333;
    line-height: 22px;
    width: 380px;
  }

  .w1197h419 {
    width: 1197px;
    display: block;
    margin: 43px auto 70px;
  }

  #wrap .tagline {
    position: absolute;
    top: 371px;
    left: 439px;
  }

  .txt1 {
    font-size: 40px;
    font-weight: bold;
    color: #333333;
    line-height: 60px;
    margin-top: 273px;
  }

  .txt2 {
    font-size: 20px;
    font-weight: 400;
    color: #666666;
    line-height: 40px;
    margin-top: 18px;
    width: 420px;
  }
}