.header-title {
  width: 100%;
  text-align: center;
  margin-top: 530px;
  margin-left: -234px;
  max-width: 400px;
  color: #fff;
}
.fristcn {
  text-align: right;
  transition-delay: 0.8s !important;
}
.first-image{
  opacity: 0;
}
.header-title img {
  width: 74%;
  margin-bottom: 10px;
}
.header-title .header-dec {
  width: 100%;
  font-size: 33px;
  padding-top: 10px;
  font-weight: bold;
}
.header-title .header-name {
  width: 100%;
  margin-top: 54px;
  font-size: 78px;
}
@media only screen and (max-width: 767px) {
  .fristcn {
    text-align: left;
  }
  .header-title {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin-left: -73px;
    margin-top: 0;
  }
  .header-title img {
    width: 35%;
    margin-bottom: 0;
  }
  .header-title img {
    margin-bottom: 0;
  }
  .header-title .header-dec {
    font-size: 10px;
    padding-top: 0;
  }
  .header-title .header-name {
    font-size: 24px;
    margin-top: 0;
  }
}
.describe {
  width: 100%;
  height: 450px;
  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: 53%;
  text-align: center;
  line-height: 60px;
  font-size: 28px;
}
@media only screen and (max-width: 767px) {
  .describe {
    width: 100%;
    height: 150px;
  }
  .describe p {
    width: 80%;
    line-height: 18px;
    font-size: 10px;
  }
}
.first_content {
  width: 100%;
  height: 900px;
  background: #000;
}
.first_content img {
  width: 100%;
  height: 800px;
}
.first_content .first_desc {
  position: relative;
  width: 100%;
  display: flex;
  align-items: center;
}
.first_content .first_desc p {
  position: absolute;
  right: 130px;
  bottom: 300px;
  width: 50%;
  font-size: 30px;
  /* letter-spacing: 5px; */
}
@media only screen and (max-width: 767px) {
  .first_content {
    height: 200px;
  }
  .first_content .first_desc p {
    width: 100%;
    font-size: 10px;
    bottom: 0;
    right: 0;
    letter-spacing: 0;
    text-align: center;
  }
}
.ten_year{
  width: 100%;
  height: 1823px;
  background: #000;
}
.ten_year .ten_year_title{
  width: 50%;
  height: 150px;
  font-size: 63px;
  font-weight: bold;
  text-align: center;
  display: flex;
  justify-content: center;
  align-items: center;
}
.ten_year .ten_year_desc p{
  width: 100%;
  height: 350px;
  font-size: 32px;
  line-height: 55px;
  /* letter-spacing: 5px; */
  display: flex;
  justify-content: center;
  align-items: center;
}
@media only screen and (max-width: 767px){
  .ten_year{
    height: 545px;
  }
  .ten_year .ten_year_title{
    width: 100%;
  font-size: 18px;
  height: 100px;
  }
  .ten_year .ten_year_desc p{
    height: 180px;
    font-size: 11px;
    letter-spacing: 0;
    line-height: 20px;
  }
}
.popular_writings{
  position: relative;
  width: 100%;
  height: 1305px;
  background: #000;
}
.popular_writings .popular_img{
  width: 80%;
  position: absolute;
  right: 0;
  top: 0;
}
.popular_writings .popular_title{
  font-size: 63px;
  font-weight: bold;
  position: absolute;
  top: 395px;
  left: 48px;
  width: 50%;
  height: 150px;
  display: flex;
  align-items: center;
}
.popular_content{
  width: 40%;
  height: 525px;
  background-color: rgba(0, 0, 0, 0.5);
  position: absolute;
  top: 551px;
  left: 48px;
  display: flex;
  align-items: center;
}

.popular_content .popular_desc{
  font-size: 32px;
  line-height: 55px;
  font-weight: 300;
}
@media only screen and (max-width: 767px){
  .popular_writings{
    height: 282px;
  }
  .popular_writings .popular_title{
    width: 55%;
    text-align: center;
    height: 42px;
    font-size: 20px;
    top: 10px;
    left: 0;
  }
  .popular_content{
    width: 95%;
    height: 175px;
    top: 60px;
    left: 0;
  }
  .popular_content .popular_desc{
    font-size: 10px;
    line-height: 20px;
  }
}
.famous_books{
  width: 100%;
  height: 1425px;
  background: #000;
  
}
.famous_books .famous_title{
  width: 100%;
  height: 150px;
  font-size: 63px;
  font-weight: bold;
  display: flex;
  align-items: center;
  justify-content: center;
}
.famous_content .content_one,.content_two{
display: flex;
align-items: center;
justify-content: center;
}
.famous_content .content_one img , .content_two img{
  width:50% ;
}
.famous_content .content_one .desc_success,.content_two .desc{
  width: 50%;
}
.famous_content .content_one .desc_success p,.content_two .desc p{
  font-size: 26px;
  width: 100%;
  padding-left: 10px;
  line-height: 56px;
}
@media only screen and (max-width: 767px){
  .famous_books{
    height: 450px;
  }
  .famous_books .famous_title{
    font-size: 21px;
  }

  .famous_content .content_one img, .content_two img{
    width: 50%;
  }
  .famous_content .content_one .desc_success p,.content_two .desc p{
    font-size: 14px;
    line-height: 20px;
    line-height: 20px;
    padding-left: 0;
    width: 100%;
    overflow:hidden;
    -webkit-line-clamp:3;
    text-overflow:ellipsis;
     white-space:nowrap;

  }
}
.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%;
  }
}