.index-first_screen {
  position: relative;
  overflow: hidden;
  background: rgba(0,0,0,.5);
}

.index-first_screen video {
  position: absolute;
  left: 0;
  top: 0;
  z-index: -1;
}

.wrapper {
  display: flex;
  margin: auto;
}

.index-first_screen .wrapper {
  flex-direction: column;
  align-items: center;
  min-height: 100vh;
}

.index-first_screen .logo_text {
  margin: auto;
}

.index-first_screen .phrase {
  font-size: 30px;
  color: rgba(255, 255, 255, 0.9);
  line-height: 42px;
  letter-spacing: 7px;
}

.index-first_screen .btn_next {
  width: 44px;
  height: 66px;
  margin: 62px auto 53px;
}

.index-section1 {
  background-color: rgba(0, 0, 0, 0.3);
}

.index-section1 .wrapper {
  position: absolute;
  top: 50%;
  right: 0;
  left: 0;
  transform: translateY(-50%);
  justify-content: space-between;
  max-width: 1500px;
}

.index-section1 .ipfs_container {
  display: flex;
  align-items: center;
  width: 708px;
}

.index-section1 .ipfs_container1 {
  margin-bottom: 15px;
}

.index-section1 .ipfs_container .ipfs_img {
  width: 130px;
  height: 221px;
  min-width: 130px;
  min-height: 221px;
}

.index-section1 .ipfs_container .ipfs {
  padding: 0 0 13px 32px;
  font-size: 20px;
  color: rgba(255, 255, 255, 0.9);
  line-height: 32px;
  letter-spacing: 2px;
}

.index-section1 .ipfs_container .ipfs .title {
  margin-bottom: 17px;
  font-size: 64px;
  font-family: "DINCond-BlackAlternate";
  font-weight: normal;
  color: #ffffff;
  line-height: 64px;
}

.index-section1 .ipfs .ipfs-conetnt {
  letter-spacing: 2px;
  font-size: 20px;
  opacity: 0.9;
  font-weight: 300;
}

.filecoin-content {
  letter-spacing: 2px;
  font-size: 20px;
  opacity: 0.9;
  font-weight: 300;
}

.index-section1 .filecoin_container {
  display: flex;
  align-items: flex-end;
  width: 708px;
}

.index-section1 .filecoin_container .filecoin_img {
  width: 130px;
  height: 183px;
  min-width: 130px;
  min-height: 183px;
}

.index-section1 .filecoin_container .ipfs .title {
  margin-bottom: 17px;
  font-size: 64px;
  font-family: "DINCond-BlackAlternate";
  font-weight: normal;
  color: #ffffff;
  line-height: 64px;
}

.index-section1 .filecoin_container .ipfs {
  padding: 0 0 13px 32px;
  font-size: 20px;
  color: rgba(255, 255, 255, 0.9);
  line-height: 32px;
  letter-spacing: 2px;
}

.index-section2 {
  background-color: rgba(0, 0, 0, 0.51);
}

.index-section2 .wrapper {
  font-size: 33px;
  line-height: 53px;
  color: rgba(255, 255, 255, 0.9);
  letter-spacing: 2px;
}

.brand-introduction {
  font-size: 44px;
  font-weight: 300;
  line-height: 65px;
  padding-top: 10px;
}

.index-section3 {
  background-color: rgba(0, 0, 0, 0.72);
}

.index-section3 .wrapper {
  flex-direction: column;
  align-items: center;
  font-size: 30px;
  color: rgba(255, 255, 255, 0.9);
  letter-spacing: 3px;
  line-height: 44px;
  text-align: center;
  font-weight: 300;
}

.index-section3 .wrapper h1 {
  font-size: 69px;
  font-family: "ZaoZiGongFangLangChangGuiTi";
  font-weight: bold;
  color: #f7f7f7;
  line-height: 86px;
  letter-spacing: 2px;
  background-image: -webkit-linear-gradient(
    right,
    #ffffff,
    #a5a5a5,
    #ffffff,
    #dcdcdc,
    #ffffff
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.index-section3 .wrapper img {
  width: 396px;
  height: 583px;
  margin: 27px 13px;
  padding: 25px 15px;
  background: rgba(255,255,255,.6);
  border-radius: 5px;
  box-sizing: border-box;
}

.index-section3 .wrapper .content {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}

.index-section4 {
  flex-direction: column;
  background-color: rgba(0, 0, 0, 0.5);
}

.index-section4::after {
  position: absolute;
  right: 0;
  bottom: 100px;
  left: 0;
  content: "";
  width: 100%;
  height: 1px;
  background-color: #7c4043;
}

.index-section4 .wrapper {
  display: block;
  font-size: 40px;
  color: rgba(255, 255, 255, 0.9);
  letter-spacing: 3px;
  line-height: 70px;
  text-align: center;
}

.index-section4 .wrapper img {
  margin-bottom: 15px;
}

@media (max-width: 767px) {
  .wrapper {
    flex-direction: column;
    padding: 0 20px;
  }

  .index-first_screen .wrapper .logo_text {
    width: 209px;
    height: 156px;
    margin: auto;
  }

  .index-first_screen .phrase {
    bottom: 94px;
    font-size: 16px;
    line-height: 18px;
    letter-spacing: 4px;
    font-weight: 300;
  }
  .index-section1 .ipfs .filecoin-content,.index-section1 .ipfs .ipfs-conetnt {
    font-size: 16px;
    letter-spacing: 1px;
  }

  .index-first_screen .btn_next {
    bottom: 28px;
    width: 21px;
    height: 31px;
  }

  .index-section1 header {
    display: none;
  }

  .index-section1 .wrapper {
    flex-direction: column;
    padding: 0 10px;
  }

  .index-section1 .ipfs_container {
    /*width: 355px;*/
    width: auto;
  }

  .index-section1 .ipfs_container .ipfs_img {
    width: 100px;
    height: 180px;
    min-width: 100px;
    min-height: 180px;
  }

  .index-section1 .ipfs_container .ipfs {
    padding: 19px 0 6px 16px;
    font-size: 14px;
    line-height: 21px;
    letter-spacing: 1px;
  }

  .index-section1 .ipfs_container .ipfs img {
    width: 48px;
    height: 23px;
    margin-bottom: 9px;
  }

  .index-section1 .filecoin_container {
    /*width: 355px;*/
    width: auto;
    margin-top: 50px;
  }

  .index-section1 .filecoin_container .filecoin_img {
    min-width: 100px;
    min-height: 149px;
    width: 100px;
    height: 149px;
  }

  .index-section1 .filecoin_container .ipfs img {
    width: 95px;
    height: 23px;
    margin-bottom: 9px;
  }

  .index-section1 .filecoin_container .ipfs {
    padding: 0 0 6px 16px;
    font-size: 14px;
    line-height: 24px;
  }

  .index-section1 .ipfs_container .ipfs .title,
  .index-section1 .filecoin_container .ipfs .title {
    margin-bottom: 9px;
    font-size: 30px;
    line-height: 38px;
  }

  .index-section2 .wrapper {
    font-size: 18px;
    line-height: 35px;
  }

  .index-section2 .wrapper img {
    width: 250px;
    height: 145px;
    margin-left: 43.5px;
  }
  .brand-introduction {
    font-size: 16px;
    text-align: center;
    line-height: 30px;
    padding-top: 0px;
    font-weight: 500;
    margin-top: -30px;
  }

  .index-section3 .wrapper {
    padding: 20px;
    font-size: 22px;
    line-height: 30px;
  }

  .index-section3 .wrapper h1 {
    margin-bottom: 0;
    font-size: 24px;
    font-family: "ZaoZiGongFangLangChangGuiTi";
    font-weight: bold;
    color: #f7f7f7;
    line-height: 38px;
    letter-spacing: 2px;
  }

  .index-section3 .wrapper img {
    width: 300px;
    height: 443px;
    /*margin: 15px 0;*/
    margin: 15px 1px;
    margin-bottom: 5px;
  }
  .index-section3 .wrapper .content_item {
    font-size: 14px;
    line-height: 18px;
  }

  .index-section3  .content_item p{
    letter-spacing: 1px;
    font-weight: 400;
    font-size: 14px;
    line-height: 20px;
  }

  .index-section4 {
    flex-direction: column;
  }

  .index-section4 .wrapper {
    padding-top: 20px;
    font-size: 17px;
    line-height: 27px;
    padding-bottom: 50px;
    letter-spacing: 1px;
  }

  .index-section4 .wrapper img {
    width: 209px;
    height: 156px;
  }
}
.cop_tit{
  display:none;
}

.cop_list{
  display: flex;
  flex-direction: row;
  margin: 30px auto;
  margin-top: 40px;
  min-width: 1150px;
  justify-content: space-between;
}
.cop_list img{height: 30px;}
@media (max-width: 1150px) {
  .cop_list{
    flex-direction: column;
    width: 100%;
    min-width: auto;
    text-align: center;
  }
  .cop_tit{
    display: block;
    margin-bottom: 0;
    font-size: 24px;
    font-family: "ZaoZiGongFangLangChangGuiTi";
    font-weight: bold;
    color: #f7f7f7;
    line-height: 38px;
    letter-spacing: 2px;
    text-align: center;

  }
  .cop_list li{
    margin-bottom: 20px;
  }
}