.header-title {
    width: 100%;
    display: inline-block;
    text-align: left;
    margin-top: 130px;
    max-width: 400px;
    color: #fff;
  }
  .fristcn {
    text-align: right;
    transition-delay: 0.8s !important;
  }
  .first-image{
    opacity: 0;
  }
  .header-title img {
    width: 45%;
    margin-bottom: 10px;
  }
  .header-title .header-dec {
    width: 100%;
    font-size: 25px;
    margin-bottom: 20px;
  }
  .header-title .header-name {
    width: 100%;
    margin-top: 40px;
    font-size: 60px;
    letter-spacing: 5px;
  }
  @media only screen and (max-width: 767px) {
    .fristcn {
      text-align: left;
    }
    .header-title {
      text-align: right;
      margin-top: 0;
    }
    .header-title img {
      width: 35%;
      margin-bottom: 0;
    }
    .header-title img {
      margin-bottom: 0;
    }
    .header-title .header-dec {
      font-size: 10px;
      margin-bottom: 0;
    }
    .header-title .header-name {
      font-size: 14px;
      margin-top: 0;
      letter-spacing: 2px;
    }
  }
  .describe {
    width: 100%;
    height: 400px;
    background: #000;
    color: #fff;
    display: flex;
    align-items: center; /*定义body的元素垂直居中*/
    justify-content: center;
  }
  .describe p {
    width: 64%;
    text-align: center;
    line-height: 60px;
    font-size: 28px;
  }
  @media only screen and (max-width: 767px) {
    .describe {
      width: 100%;
      height: 240px;
    }
    .describe p {
      width: 90%;
      line-height: 18px;
      font-size: 10px;
    }
  }
  .content-frist {
    position: relative;
    width: 100%;
    height: 750px;
    background: #000;
    color: #fff;
  }
  .frist-icon img {
    position: absolute;
    top: 80px;
    right: 30px;
    width: 6%;
  }
  .content-frist .frist-desc {
    position: absolute;
    top: 253px;
    left: 30px;
    width: 100%;
    font-size: 25px;
    line-height: 45px;
  }
  @media only screen and (max-width: 767px) {
    .content-frist {
      height: 150px;
    }
    .content-frist .frist-desc {
      width: 100%;
      font-size: 10px;
      top: 30px;
      left: 5px;
      line-height: 20px;
    }
  }
  .second-title {
    width: 100%;
    height: 50px;
    padding-top: 30px;
  }
  .second-title img {
    width: 465px;
    height: 62px;
    display: block;
    margin: 0 auto;
  }
  .second-desc {
    color: #fff;
    text-align: center;
    padding: 20px 0 20px 0;
  }
  .second-img {
    max-width: 1105px;
    width: 1105px;
    display: block;
    margin: 0 auto;
  }
  .second-img img {
    width: 30%;
    height: 20%;
    float: left;
    padding-left: 5px;
    padding-bottom: 5px;
  }
  @media only screen and (max-width: 767px) {
    .second-title {
      height:30px;
    }
    .second-img {
      width: 100%;
 
    }
    .second-desc {
      font-size: 12px;
      
    }
    .second-title img {
      width: 246px;
      height: 50px;
    }
  }
  .four{
    background: #000;
  }
  .four img {
    width: 50%;
    padding-top: 50px;
  }
  .four .one {
    padding-left: 132px;
    padding-bottom: 60px;
  }
  .four .two {
    width: 40%;
    padding-left: 750px;
    padding-bottom: 60px;
  }
  .four .three {
    padding-left: 132px;
    padding-bottom: 60px;
  }
  .four .fours {
    width: 65%;
    padding-left: 290px;
    padding-bottom: 60px;
  }
  .four .five {
    /* width: 50%; */
    padding-left: 150px;
    padding-bottom: 60px;
  }
  .four .sex {
    width: 52%;
    padding-left: 612px;
  }
  .four .seven {
    width: 62%;
    padding-left: 144px;
    padding-bottom: 60px;
  }
  @media only screen and (max-width: 767px) {
    .four .one {
      padding-left: 20px;
      padding-bottom: 0;
      width: 80%;
    }
    .four .two {
      padding-left: 20px;
      padding-bottom: 0;
      width: 80%;
    }
    .four .three {
      padding-left: 20px;
      padding-bottom: 0;
      width: 80%;
    }
    .four .fours {
      padding-left: 20px;
      padding-bottom: 0;
      width: 80%;
    }
    .four .five {
      padding-left: 20px;
      padding-bottom: 0;
      width: 80%;
    }
    .four .sex {
      padding-left: 20px;
      padding-bottom: 0;
      width: 80%;
    }
    .four .seven {
      padding-left: 20px;
      padding-bottom: 0;
      width: 80%;
    }
  }
  .five {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #000;
  }
  .five img {
    width: 38%;
    background: #000;
  }
  @media only screen and (max-width: 767px){
    .five{
      height: 115px;
    }
    .five img{
        width: 55%;
    }
  }
  .sex {
    width: 100%;
    height: 900px;
    padding-top: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    background: #000;
  }
  .sex img {
    width: 100%;
    height: 740px;
  }
  .sex .sex_desc {
    position: absolute;
    width: 100%;
    font-size: 22px;
    padding-left: 290px;
    line-height: 40px;
  }
  @media only screen and (max-width: 767px) {
    .sex {
      width: 100%;
      height: 175px;
    }
    .sex img {
      width: 100%;
      height: 250px;
    }
    .sex .sex_desc {
      font-size: 10px;
      line-height: 16px;
      letter-spacing: 0;
      padding-left: 20px;
    }
  }
  .content_sex {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 100px;
    background: #000;
  }

  .content_sex img {
    width: 25%;
    height: 20%;
    padding-left: 8px;
  }
  .content_sex .one {
    transition-delay: 1.8s;
  }
  .content_sex .two {
    width: 19.1%;
    transition-delay: 1.3s;
  }
  .content_sex .three {
    width: 22.5%;
    transition-delay: 0.8s;
  }
  .content_sex .four {
    transition-delay: 0.3s;
  }
  @media only screen and (max-width: 767px){
    .content_sex{
        padding-top: 50px;
    }
  }
  .sevent {
    padding-top: 150px;
    height: 800px;
    background: #000;
  }
  .sevent .sevent_title {
    font-size: 63px;
    font-weight: bold;
    padding-bottom: 80px;
    padding-left: 50px;
  }

  .sevent .sevent_desc {
    width: 55%;
    font-size: 29px;
    line-height: 53px;
    position: absolute;
    padding-left: 90px;
  }
  .sevent .sevent_img {
    width: 43%;
    padding-left: 910px;
  }
  @media only screen and (max-width: 767px) {
    .sevent {
      padding-top: 50px;
      height: 550px;
    }
    .sevent .sevent_title {
      font-size: 30px;
      padding-bottom: 0;
      padding-left: 0;
    }
    .sevent .sevent_desc {
      width: 100%;
      font-size: 10px;
      line-height: 20px;
      padding-left: 0;
    }
    .sevent .sevent_img {
      width: 60%;
      padding-left: 50px;
      padding-top: 300px;
    }
  }
  /* 背景图有问题 */
  .nine {
    width: 100%;
    height: 747px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-evenly;
    background: #000;

  }
  .nine .nine_img {
    width: 33%;
  }
  .nine .nine_desc{
    width: 66%;
  }
  .nine .nine_desc p {
    width: 100%;
    font-size: 33px;
    text-align: center;
  }
  @media only screen and (max-width: 767px) {
    .nine {
      height: 300px;
    }
    .nine .nine_desc{
      width: 80%;
    }
    .nine .nine_desc p {
      font-size: 14px;
    }
  }
  .ten{
    background: #000;
  }
  .ten img{
    margin-top: 50px;
    background: #000;
  }
  .footer {
    background: #000;
    width: 100%;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .footer  img{
      width: 15%;
  }
  @media only screen and (max-width: 767px){
 
    .footer{
        height: 200px;
    }
    .footer  img{
        width: 35%;
    }
  }