nav::after {
  opacity: 1;
}

.banner {
  position: relative;
  z-index: 9;
  top: 0;
  overflow: hidden;
  width: 100%;
  height: 0;
  padding-bottom: 49.48%;
  background-size: 100% auto;
}

.banner-animate {
  position: absolute;
  top: 140px;
  left: 48.96%;
}

@media (min-width: 1280px) {
  .banner-animate {
    left: 41%;
  }
}

@media (min-width: 1281px) {
  .banner-animate {
    left: 48.96%;
  }
}

.banner-section {
  width: 100vw;
  max-width: 1180px;
  padding: 0;
}

.banner-introduce {
  margin-top: 11.46vw;
}

.banner-title {
  width: 60.83vw;
  max-width: 1180px;
  height: 4.43vw;
  max-height: 116px;
  margin: 0 auto;
  background: url('https://cloudpnrcdn.oss-cn-shanghai.aliyuncs.com/hfwebsite/new-public/images/developer-conference/banner-developer-title.png') no-repeat center/contain;
}

.banner-title2 {
  width: 35.78vw;
  max-width: 691px;
  height: 2.24vw;
  max-height: 63px;
  margin: 0 auto;
  margin-top: 24px;
  background: url('https://cloudpnrcdn.oss-cn-shanghai.aliyuncs.com/hfwebsite/new-public/images/developer-conference/banner-developer-title2.png') no-repeat center/contain;
}

.banner .mask {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 10.94vw;
  background: url(https://cloudpnrcdn.oss-cn-shanghai.aliyuncs.com/hfwebsite/new-public/images/engineering-platform/mask.png) no-repeat center;
  background-size: 100% 100%;
}

@media (max-width: 900px) {
  .banner .mask {
    height: 218px;
  }
}

/* main内容 */
.main {
  position: relative;
  z-index: 10;
  margin: 0 auto;
}

.main-section-1 {
  width: 1160px;
  margin: 0 auto;
}

.main-section-1::before {
  position: absolute;
  top: -80px;
  left: 124px;
  width: 300px;
  height: 300px;
  background-image: linear-gradient(212deg, #ff633533 0%, #ff9e1833 89%);
  content: '';
  filter: blur(50px);
  opacity: 0.54;
}

.main-section-1 .section-title {
  color: #333;
  font-size: 36px;
  font-weight: 600;
  text-align: center;
}

.main-section-1 .section-desc {
  margin-top: 8px;
  color: #666;
  font-size: 16px;
  font-weight: 300;
  text-align: center;
}

.main-section-1 .section-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 64px;
}

.main-section-1 .section-container .section-left {
  position: relative;
  width: 630px;
  height: 630px;
  background: url('https://cloudpnrcdn.oss-cn-shanghai.aliyuncs.com/hfwebsite/new-public/images/developer-conference/section-1-left.png') no-repeat center;
  background-size: 100% 100%;
}

.main-section-1 .section-container .section-left::before {
  position: absolute;
  top: 120px;
  left: -142px;
  width: 439px;
  height: 439px;
  background-image: linear-gradient(212deg, #35b9ff33 0%, #184cff33 89%);
  content: '';
  filter: blur(50px);
  opacity: 0.54;
}

.main-section-1 .section-container .section-right {
  width: 456px;
}

.main-section-1 .section-container .section-right .section-logo {
  width: 100px;
  height: 29px;
}

.main-section-1 .section-container .section-right .section-desc {
  margin-top: 16px;
  color: #666;
  font-size: 16px;
  font-weight: 400;
  letter-spacing: 0;
  line-height: 30px;
  text-align: left;
}

.main-section-2 {
  height: 880px;
  margin-top: 92px;
}

.main-section-2 .section-head {
  width: 1160px;
  padding-left: 30px;
  margin: 0 auto;
  color: #333;
}

.main-section-2 .section-head .section-title {
  padding-top: 108px;
  font-size: 36px;
  font-weight: 600;
}

.main-section-2 .section-head .section-desc {
  margin-top: 8px;
  color: #666;
  font-size: 16px;
  font-weight: 300;
  letter-spacing: 2px;
}

.main-section-2 .section-guide {
  display: flex;
  width: 1160px;
  margin: 0 auto;
}

.main-section-2 .section-guide .section-guide-img {
  width: 385px;
  padding-top: 65px;
  margin: 0 auto;
}

.main-section-3 {
  height: 0;
  padding-bottom: 60.78%;
  background: url() no-repeat;
  background-size: 100% auto;
}

.main-section-3 .section-box {
  left: 0;
  width: 60.42vw;
  max-width: 1160px;
  margin: 0 auto;
}

.main-section-3 .section-title {
  width: 100%;
  padding-top: 10.94vw;
  color: #fff;
  font-size: 1.875vw;
  font-weight: 600;
  text-align: center;
}

.main-section-3 .section-bg {
  position: relative;
  top: 4.17vw;
  width: 100%;
  height: 36.77vw;
  max-height: 706px;
  background: url('https://cloudpnrcdn.oss-cn-shanghai.aliyuncs.com/hfwebsite/new-public/images/developer-conference/section-3-base-bg.png') no-repeat center;
  background-size: calc(100% + 7.81vw) calc(100% + 4.43vw);
}

.main-section-3 .section-bg::before {
  position: absolute;
  top: 5.78vw;
  left: 0;
  width: 63.125vw;
  max-width: 1212px;
  height: 24.64vw;
  max-height: 473px;
  background: url('https://cloudpnrcdn.oss-cn-shanghai.aliyuncs.com/hfwebsite/new-public/images/developer-conference/section-3-adorn-bg.png') no-repeat center;
  background-size: 100% 100%;
  content: '';
}

.main-section-3 .section-bg::after {
  position: absolute;
  top: 15.36vw;
  left: 26.56vw;
  width: 7.14vw;
  height: 3.39vw;
  background: url('https://cloudpnrcdn.oss-cn-shanghai.aliyuncs.com/hfwebsite/new-public/images/developer-conference/dougong.png') no-repeat center;
  background-size: 100% 100%;
  content: '';
}

.main-section-3 .section-item {
  position: absolute;
  width: 6.15vw;
  height: 6.15vw;
}

.main-section-3 .section-item::after {
  position: absolute;
  top: -1.3vw;
  right: -2.34vw;
  width: 4.69vw;
  height: 4.74vw;
  content: '';
}

.main-section-3 .section-item::before {
  position: absolute;
  top: 0;
  right: 0;
  width: 100%;
  height: 100%;
  content: "";
  opacity: 0;
  transition: opacity 0.3s ease-in-out;
}

.main-section-3 .section-item.item1 {
  top: 11.51vw;
  left: 6.46vw;
  width: 5.52vw;
  height: 5.52vw;
  background: url('https://cloudpnrcdn.oss-cn-shanghai.aliyuncs.com/hfwebsite/new-public/images/developer-conference/section-3-item1.png') no-repeat center;
  background-size: 100% 100%;
}

.main-section-3 .section-item.item1::after {
  background: url('https://cloudpnrcdn.oss-cn-shanghai.aliyuncs.com/hfwebsite/new-public/images/developer-conference/section-3-item1-icon.png') no-repeat center;
  background-size: 100% 100%;
}

.main-section-3 .section-item.item1::before {
  background: url('https://cloudpnrcdn.oss-cn-shanghai.aliyuncs.com/hfwebsite/new-public/images/developer-conference/section-3-item1-highlight.png') no-repeat center;
  background-size: 100% 100%;
}

.main-section-3 .section-item.item1:hover::before {
  opacity: 1;
}

.main-section-3 .section-item.item2 {
  top: 22.66vw;
  left: 12.5vw;
  background: url('https://cloudpnrcdn.oss-cn-shanghai.aliyuncs.com/hfwebsite/new-public/images/developer-conference/section-3-item2.png') no-repeat center;
  background-size: 100% 100%;
}

.main-section-3 .section-item.item2::after {
  background: url('https://cloudpnrcdn.oss-cn-shanghai.aliyuncs.com/hfwebsite/new-public/images/developer-conference/section-3-item2-icon.png') no-repeat center;
  background-size: 100% 100%;
}

.main-section-3 .section-item.item2::before {
  background: url('https://cloudpnrcdn.oss-cn-shanghai.aliyuncs.com/hfwebsite/new-public/images/developer-conference/section-3-item2-highlight.png') no-repeat center;
  background-size: 100% 100%;
}

.main-section-3 .section-item.item2:hover::before {
  opacity: 1;
}

.main-section-3 .section-item.item3 {
  top: 22.65vw;
  left: 40vw;
  background: url('https://cloudpnrcdn.oss-cn-shanghai.aliyuncs.com/hfwebsite/new-public/images/developer-conference/section-3-item3.png') no-repeat center;
  background-size: 100% 100%;
}

.main-section-3 .section-item.item3::after {
  background: url('https://cloudpnrcdn.oss-cn-shanghai.aliyuncs.com/hfwebsite/new-public/images/developer-conference/section-3-item3-icon.png') no-repeat center;
  background-size: 100% 100%;
}

.main-section-3 .section-item.item3::before {
  background: url('https://cloudpnrcdn.oss-cn-shanghai.aliyuncs.com/hfwebsite/new-public/images/developer-conference/section-3-item3-highlight.png') no-repeat center;
  background-size: 100% 100%;
}

.main-section-3 .section-item.item3:hover::before {
  opacity: 1;
}

.main-section-3 .section-item.item4 {
  top: 17.24vw;
  left: 51.82vw;
  width: 5vw;
  height: 5vw;
  background: url('https://cloudpnrcdn.oss-cn-shanghai.aliyuncs.com/hfwebsite/new-public/images/developer-conference/section-3-item4.png') no-repeat center;
  background-size: 100% 100%;
}

.main-section-3 .section-item.item4::after {
  background: url('https://cloudpnrcdn.oss-cn-shanghai.aliyuncs.com/hfwebsite/new-public/images/developer-conference/section-3-item4-icon.png') no-repeat center;
  background-size: 100% 100%;
}

.main-section-3 .section-item.item4::before {
  background: url('https://cloudpnrcdn.oss-cn-shanghai.aliyuncs.com/hfwebsite/new-public/images/developer-conference/section-3-item4-highlight.png') no-repeat center;
  background-size: 100% 100%;
}

.main-section-3 .section-item.item4:hover::before {
  opacity: 1;
}

.main-section-3 .section-item.item5 {
  top: 7.19vw;
  left: 39.43vw;
  background: url('https://cloudpnrcdn.oss-cn-shanghai.aliyuncs.com/hfwebsite/new-public/images/developer-conference/section-3-item5.png') no-repeat center;
  background-size: 100% 100%;
}

.main-section-3 .section-item.item5::after {
  background: url('https://cloudpnrcdn.oss-cn-shanghai.aliyuncs.com/hfwebsite/new-public/images/developer-conference/section-3-item5-icon.png') no-repeat center;
  background-size: 100% 100%;
}

.main-section-3 .section-item.item5::before {
  background: url('https://cloudpnrcdn.oss-cn-shanghai.aliyuncs.com/hfwebsite/new-public/images/developer-conference/section-3-item5-highlight.png') no-repeat center;
  background-size: 100% 100%;
}

.main-section-3 .section-item.item5:hover::before {
  opacity: 1;
}

.main-section-3 .section-item .section-item-title {
  position: absolute;
  bottom: -2.08vw;
  left: 50%;
  color: #fff;
  font-size: 1.15vw;
  font-weight: 600;
  transform: translateX(-50%);
  white-space: nowrap;
}

@media (min-width: 1920px) {
  .main-section-3 .section-title {
    padding-top: 210px;
    font-size: 36px;
  }

  .main-section-3 .section-bg {
    top: 80px;
    background-size: calc(100% + 150px) calc(100% + 85px);
  }

  .main-section-3 .section-item.item1 {
    top: 220px;
    left: 130px;
    width: 106px;
    height: 106px;
  }

  .main-section-3 .section-item.item2 {
    top: 435px;
    left: 240px;
    width: 118px;
    height: 118px;
  }

  .main-section-3 .section-item.item3 {
    top: 435px;
    left: 768px;
    width: 118px;
    height: 118px;
  }

  .main-section-3 .section-item.item4 {
    top: 330px;
    left: 1010px;
    width: 96px;
    height: 96px;
  }

  .main-section-3 .section-item.item5 {
    top: 145px;
    left: 770px;
    width: 118px;
    height: 118px;
  }

  .main-section-3 .section-bg::after {
    top: 295px;
    left: 507px;
    width: 137px;
    height: 65px;
  }

  .main-section-3 .section-item .section-item-title {
    bottom: -40px;
    font-size: 22px;
  }

  .main-section-3 .section-item::after {
    top: -28px;
    right: -50px;
    width: 90px;
    height: 91px;
  }

  .main-section-3 .section-bg::before {
    top: 110px;
  }

  .banner-introduce {
    margin-top: 220px;
  }

  .banner .mask {
    top: 735px;
    height: 218px;
  }
}

.free-service {
  margin-top: -64px;
}