.about-page {
  position: relative;
  width: 100%;
  overflow: hidden;
}

.page-container {
  width: 100%;
  background: #FFFFFF;
}

.logo-img {
  width: 3.5rem;
  height: 3.5rem;
  margin: 0.8rem 0 0 8%;
}

.logo-group {
  width: auto;
  height: auto;
  margin: 1.875rem 0 0 20%;
}

.company-name {
  width: auto;
  height: auto;
  overflow-wrap: break-word;
  color: rgba(12, 12, 14, 1);
  font-size: 1.3125rem;
  font-family: MicrosoftYaHei-Bold;
  font-weight: 700;
  text-align: left;
  white-space: nowrap;
  line-height: 1.5;
}

.logo-underline {
  width: 9.5rem;
  height: 0.125rem;
  margin: 0.25rem 0 0 0.0625rem;
}

.nav-business,
.nav-media,
.nav-opportunities,
.nav-contact {
  width: auto;
  height: auto;
  overflow-wrap: break-word;
  color: rgba(12, 12, 14, 1);
  font-size: 1.3125rem;
  font-family: MicrosoftYaHei;
  font-weight: NaN;
  text-align: left;
  white-space: nowrap;
  line-height: 1.5;
  margin: 1.875rem 0 0 7%;
}

.main-content {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 80px 20px;
}

.content-group {
  position: relative;
  width: 80%;
  max-width: 1552px;
  min-height: auto;
  margin: 8% auto 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
}

.brand-tiantian,
.brand-laojiefang {
  width: 100%;
  max-width: 200px;
  height: auto;
  margin: 2rem 0;
}

.brand-title-1,
.brand-title-2 {
  width: 100%;
  height: auto;
  overflow-wrap: break-word;
  color: rgba(255, 255, 255, 1);
  font-size: 1.3125rem;
  font-family: MicrosoftYaHei;
  font-weight: NaN;
  text-align: left;
  line-height: 1.6;
  margin: 0 0 0.5rem 0;
}

.brand-subtitle-1,
.brand-subtitle-2 {
  width: 100%;
  height: auto;
  overflow-wrap: break-word;
  color: rgba(255, 255, 255, 1);
  font-size: 1rem;
  font-family: MicrosoftYaHei;
  font-weight: NaN;
  text-align: left;
  line-height: 1.6;
  margin: 0;
}

.brand-icon-1,
.brand-icon-2 {
  width: 2.3125rem;
  height: 2.3125rem;
  margin: 2rem 0;
}

.company-intro {
  position: relative;
  left: auto;
  top: auto;
  width: 100%;
  height: auto;
  margin: 2rem 0;
}

.intro-title {
  width: 100%;
  height: auto;
  overflow-wrap: break-word;
  color: rgba(0, 0, 0, 1);
  font-size: 2.5rem;
  font-family: MicrosoftYaHei-Bold;
  font-weight: 700;
  text-align: left;
  line-height: 1.4;
  margin: 0 0 0.5rem 0;
  padding-bottom: 40px;
  margin-bottom: 40px;
  border-bottom: 1px solid #B5B5B5;
}

.intro-slogan {
  width: 100%;
  height: auto;
  overflow-wrap: break-word;
  color: rgba(70, 69, 69, 1);
  font-size: 2.5rem;
  font-family: MicrosoftYaHei;
  font-weight: NaN;
  text-align: left;
  line-height: 1.4;
  margin: 0 0 3rem 0;
  padding-bottom: 40px;
  border-bottom: 1px solid #B5B5B5;
}

.intro-heading,
.history-heading,
.advantages-heading,
.vision-heading {
  width: 100%;
  height: auto;
  overflow-wrap: break-word;
  color: rgba(61, 157, 61, 1);
  font-size: 2rem;
  font-family: MicrosoftYaHei-Bold;
  font-weight: 700;
  text-align: left;
  line-height: 1.4;
  margin: 3rem 0 1.5rem 0;
}

.intro-description,
.history-content-1,
.history-content-2,
.history-content-3,
.advantages-content,
.vision-content {
  width: 100%;
  height: auto;
  overflow-wrap: break-word;
  color: rgba(70, 69, 69, 1);
  font-size: 1.5rem;
  font-family: MicrosoftYaHei;
  font-weight: NaN;
  text-align: left;
  line-height: 1.8;
  margin: 0 0 1.5rem 0;
}

.history-period-1,
.history-period-2,
.history-period-3 {
  width: 100%;
  height: auto;
  overflow-wrap: break-word;
  color: rgba(70, 69, 69, 1);
  font-size: 1.5rem;
  font-family: MicrosoftYaHei-Bold;
  font-weight: 700;
  text-align: left;
  line-height: 1.4;
  margin: 2.5rem 0 1rem 0;
}

.main-image {
  width: 100%;
  max-width: 1552px;
  height: auto;
  margin: 4rem auto;
  display: block;
}

.divider-line-1,
.divider-line-2 {
  position: relative;
  left: auto;
  top: auto;
  width: 70%;
  height: 0.125rem;
  margin: 2rem auto;
  display: block;
}

@media screen and (max-width: 1200px) {
  .logo-group {
    margin-left: 10%;
  }

  .nav-business,
  .nav-media,
  .nav-opportunities,
  .nav-contact {
    font-size: 1.125rem;
    margin-left: 5%;
  }

  .section-title {
    font-size: 2rem;
  }

  .intro-title,
  .intro-slogan {
    font-size: 2rem;
  }

  .intro-heading,
  .history-heading,
  .advantages-heading,
  .vision-heading {
    font-size: 1.75rem;
  }

  .intro-description,
  .history-period-1,
  .history-period-2,
  .history-period-3,
  .history-content-1,
  .history-content-2,
  .history-content-3,
  .advantages-content,
  .vision-content {
    font-size: 1.25rem;
  }
}

@media screen and (max-width: 768px) {
  .logo-img {
    width: 2.5rem;
    height: 2.5rem;
    margin-left: 5%;
  }

  .logo-group {
    margin-left: 5%;
  }

  .company-name {
    font-size: 1.125rem;
  }

  .nav-business,
  .nav-media,
  .nav-opportunities,
  .nav-contact {
    font-size: 1rem;
    margin-left: 3%;
  }

  .content-group {
    width: 90%;
    margin: 5% auto;
  }

  .brand-tiantian,
  .brand-laojiefang {
    max-width: 150px;
  }

  .brand-title-1,
  .brand-title-2 {
    font-size: 1.125rem;
  }

  .brand-subtitle-1,
  .brand-subtitle-2 {
    font-size: 0.875rem;
  }

  .intro-title,
  .intro-slogan {
    font-size: 1.75rem;
  }

  .intro-heading,
  .history-heading,
  .advantages-heading,
  .vision-heading {
    font-size: 1.5rem;
  }

  .intro-description,
  .history-period-1,
  .history-period-2,
  .history-period-3,
  .history-content-1,
  .history-content-2,
  .history-content-3,
  .advantages-content,
  .vision-content {
    font-size: 1.125rem;
    line-height: 1.7;
  }

  .main-image {
    width: 85%;
  }

  .divider-line-1,
  .divider-line-2 {
    width: 85%;
  }
}

@media screen and (max-width: 480px) {
  .logo-img {
    width: 2rem;
    height: 2rem;
    margin-left: 3%;
  }

  .company-name {
    font-size: 1rem;
  }

  .nav-business,
  .nav-media,
  .nav-opportunities,
  .nav-contact {
    font-size: 0.875rem;
    margin-left: 2%;
  }

  .content-group {
    width: 95%;
    flex-direction: column;
    align-items: center;
  }

  .brand-tiantian,
  .brand-laojiefang {
    max-width: 100%;
    text-align: center;
  }

  .brand-title-1,
  .brand-title-2 {
    font-size: 1rem;
    text-align: center;
  }

  .brand-subtitle-1,
  .brand-subtitle-2 {
    font-size: 0.75rem;
    text-align: center;
  }

  .intro-title,
  .intro-slogan {
    font-size: 1.5rem;
  }

  .intro-heading,
  .history-heading,
  .advantages-heading,
  .vision-heading {
    font-size: 1.25rem;
  }

  .intro-description,
  .history-period-1,
  .history-period-2,
  .history-period-3,
  .history-content-1,
  .history-content-2,
  .history-content-3,
  .advantages-content,
  .vision-content {
    font-size: 1rem;
    line-height: 1.6;
  }

  .main-image {
    width: 95%;
    margin: 2rem auto;
  }

  .divider-line-1,
  .divider-line-2 {
    width: 95%;
    margin: 1rem auto;
  }
}