body {
    background-color: #fff;
  }
  .banner_section {
    position: relative;
    width: 100%;
    height: 50rem;
    background: url('../images/aboutBanner.jpg') no-repeat center center;
    background-size: cover;
  }
  .banner_section .banner_mask {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.2);
  }
  .banner_section .banner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 50rem;
    position: relative;
    z-index: 4;
  }
  .banner_section .banner .banner_title {
    font-size: 4.8rem;
    color: #fff;
    font-weight: 700;
    text-align: center;
  }
  .banner_section .banner .banner_title_en {
    color: #fff;
    text-transform: uppercase;
    font-weight: 500;
    margin-top: 10px;
    font-size: 1.8rem;
    text-align: center;
  }
  .brief_section {
    padding: 4rem 0;
  }
  .brief_section .brief_title {
    display: flex;
    align-items: flex-end;
  }
  .brief_section .brief_title h4 {
    color: #333;
    font-size: 3rem;
  }
  .brief_section .brief_title p {
    color: #f1f1f1;
    font-size: 3rem;
    margin-left: 1rem;
    text-transform: uppercase;
  }
  .brief_section .brief_content {
    margin-top: 3rem;
  }
  .brief_section .brief_content h5 {
    color: #333;
    font-size: 1.6rem;
    font-weight: 600;
  }
  .brief_section .brief_content p {
    color: #666;
    font-size: 1.6rem;
    margin: 2rem 0;
    line-height: 1.6;
    text-align: justify;
  }
  .brief_section .team {
    margin-top: 8rem;
  }
  .brief_section .team .team_list {
    display: flex;
    justify-content: center;
  }
  .brief_section .team .team_list .team_item {
    position: relative;
    width: 25%;
    height: 25rem;
    padding: 5rem 3rem 0;
    cursor: pointer;
    transition: all 0.2s linear;
  }
  .brief_section .team .team_list .team_item:hover {
    background-color: #0c328b !important;
  }
  .brief_section .team .team_list .team_item:hover .team_item_num {
    color: rgba(255, 255, 255, 0.3);
  }
  .brief_section .team .team_list .team_item:hover .team_item_title {
    color: #fff;
  }
  .brief_section .team .team_list .team_item:hover p {
    color: #fff;
  }
  .brief_section .team .team_list .team_item.team_item1 {
    background-color: #f5f5f5;
  }
  .brief_section .team .team_list .team_item .team_item_num {
    position: absolute;
    top: 0;
    right: 1.8rem;
    font-size: 10rem;
    color: rgba(153, 153, 153, 0.1);
    font-weight: 700;
  }
  .brief_section .team .team_list .team_item .team_item_title {
    font-size: 2.8rem;
    font-weight: 700;
    color: #333;
    transition: all 0.2s linear;
  }
  .brief_section .team .team_list .team_item p {
    color: #666;
    line-height: 1.8;
    font-size: 1.6rem;
    margin-top: 3rem;
    transition: all 0.2s linear;
  }
  .brief_section .team .team_list .team_img {
    width: 50%;
    height: 25rem;
    overflow: hidden;
    cursor: pointer;
  }
  .brief_section .team .team_list .team_img:hover img {
    transform: scale(1.05);
  }
  .brief_section .team .team_list .team_img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: all 0.2s linear;
  }
  .advantage_section {
    padding: 4rem 0;
  }
  .advantage_section .advantage .advantage_title {
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  .advantage_section .advantage .advantage_title h4 {
    color: #333;
    font-size: 4rem;
    font-weight: 700;
  }
  .advantage_section .advantage .advantage_title p {
    color: #666;
    font-size: 2rem;
    margin-top: 1rem;
    font-weight: 500;
  }
  .advantage_section .advantage .advantage_title .advantage_line {
    width: 8rem;
    height: 0.5rem;
    background-color: #0c328b;
    margin-top: 2rem;
  }
  .advantage_section .advantage .advantage_list {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    margin-top: 5rem;
  }
  .advantage_section .advantage .advantage_list .advantage_item {
    width: 32%;
    height: 14rem;
    border: 1px solid #ccc;
    padding: 2rem;
    margin-bottom: 3rem;
    transition: all 0.2s linear;
    cursor: pointer;
  }
  .advantage_section .advantage .advantage_list .advantage_item:hover {
    box-shadow: 0 0 30px #eee;
    background-color: #fff;
  }
  .advantage_section .advantage .advantage_list .advantage_item:hover .advantage_item_title {
    color: #0c328b;
  }
  .advantage_section .advantage .advantage_list .advantage_item:hover p {
    color: #0c328b;
  }
  .advantage_section .advantage .advantage_list .advantage_item .advantage_item_title {
    color: #333;
    font-weight: 500;
    font-size: 2.6rem;
  }
  .advantage_section .advantage .advantage_list .advantage_item p {
    color: #666;
    font-size: 1.4rem;
    margin-top: 2rem;
  }
  @media screen and (max-width: 1200px) {
    .brief {
      padding: 0 2rem;
    }
    .brief_section .team {
      margin-top: 3rem;
    }
  }
  @media screen and (max-width: 900px) {
    .brief_section .team .team_list {
      display: flex;
      flex-wrap: wrap;
    }
    .brief_section .team .team_list .team_item {
      width: 50%;
    }
    .brief_section .team .team_list .team_img {
      width: 100%;
    }
    .advantage_section .advantage .advantage_list {
      margin-top: 2rem;
      padding: 0 1rem;
    }
    .advantage_section .advantage .advantage_list .advantage_item {
      width: 49%;
    }
  }
  @media screen and (max-width: 600px) {
    .advantage_section .advantage .advantage_list .advantage_item .advantage_item_title {
      font-size: 2.2rem;
    }
  }
  @media screen and (max-width: 500px) {
    .banner_section .banner .banner_title {
      padding: 0 12rem;
    }
    .banner_section .banner .banner_title_en {
      padding: 0 12rem;
    }
  }
  @media screen and (max-width: 450px) {
    .banner_section .banner .banner_title {
      padding: 0 4rem;
    }
    .banner_section .banner .banner_title_en {
      padding: 0 4rem;
    }
  }