@media (max-width: 900px) {
  .hero-section {
    display: none;
  }

  .content-1400 {
    width: 100%;
    margin: 0;
    padding: 0.5rem 0.5rem;
    background-color: #fff;
    min-height: auto;
  }

  .about-us-content-video video {
    width: 6rem;
    height: 4rem;
  }
  .about-us-content-img img {
    width: 6rem;
    height: 4rem;
  }
  .about-us-content {
    font-size: 0.35rem;
  }
  .product_topBox_left {
    display: none;
  }
  .product_topBox_right {
    width: 100%;
    margin-left: 0px !important;
  }
  .ptr_title {
    width: 100%;
  }
  .ptr_list {
    width: 100% !important;
  }
  .ptr_btn {
    margin-top: 0.2rem !important;
  }
  .xauc_title {
    font-size: 0.48rem;
  }
  .xauc_line {
    margin-top: 0.2rem;
    margin-bottom: 0.2rem;
  }
  .xauc_ftit {
    margin-bottom: 0.2rem;
  }
  .xauc_box {
    width: 6rem;
    flex-direction: column;
  }
  .xauc_box_li {
    width: 6rem;
    height: 0.9rem;
    box-sizing: border-box;
  }
}