.about {
  padding-top: 30px;
  position: relative;
}

.about .top-wrap {
  color: #fff;
  padding-top: 30px;
  padding-bottom: 120px;
  min-height: 31.25vw;
}

.about .title {
  margin-bottom: 20px;
}

.about .sub-info {
  line-height: 1.8;
}

.about>.container {
  margin-top: -80px;
  position: relative;
  z-index: 1;
}

.about .item-list li {
  color: #fff;
  padding: 30px 15px 20px;
  position: relative;
}

.about .item-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: rgba(68, 68, 68, .75);
}

.about .item-list li>* {
  position: relative;
  z-index: 1;
}

.about .num {
  font-size: 18px;
  line-height: 1;
  position: relative;
  text-align: left;
}

.about .counter {
  font-size: 45px;
}

.about .num::after {
  content: '';
  display: block;
  width: 50px;
  height: 5px;
  margin-top: 15px;
  background: #fff;
}

.about .tit {
  margin-top: 12px;
  margin-bottom: 20px;
  font-size: 18px;
}

.about .icon {
  display: block;
  text-align: right;
  font-size: 45px;
  line-height: 1;
}

@media (min-width: 600px) {
  .about .top-wrap {
    padding-bottom: 140px;
  }

  .about>.container {
    margin-top: -100px;
  }

  .about .item-list {
    display: flex;
    flex-wrap: wrap;
  }

  .about .item-list li {
    flex: 0 0 50%;
    max-width: 50%;
    padding-left: 30px;
    padding-right: 30px;
  }
}

@media (min-width: 1200px) {
  .about {
    padding-top: 60px;
  }

  .about .top-wrap {
    padding-top: 55px;
    padding-bottom: 180px;
  }

  .about .title {
    margin-bottom: 40px;
  }

  .about>.container {
    margin-top: -140px;
  }

  .about .item-list li {
    flex: 1;
    padding-top: 45px;
    padding-left: 36px;
  }

  .about .item-list li:hover::before {
    background: rgba(33, 164, 71, .8);
  }

  .about .icon {
    font-size: 54px;
  }

  .about .num,
  .about .tit {
    font-size: 20px;
  }

  .about .counter {
    font-size: 55px;
  }

  .about .num::after {
    margin-top: 28px;
  }

  .about .tit {
    margin-top: 22px;
    margin-bottom: 36px;
  }
}

@media (min-width: 1440px) {
  .about {
    padding-top: 74px;
  }

  .about .top-wrap {
    padding-bottom: 210px;
  }

  .about .title {
    margin-bottom: 51px;
  }

  .about>.container {
    margin-top: -173px;
  }

  .about .item-list li {
    padding: 60px 40px 36px;
  }

  .about .num,
  .about .tit {
    font-size: 26px;
  }

  .about .counter {
    font-size: 70px;
  }
}


/* target */
.target {
  padding: 30px 0;
}

.target .lt {
  margin-bottom: 20px;
}

.target .title {
  text-align: left;
  margin-bottom: 15px;
}

.target .info {
  line-height: 1.8;
}

@media (min-width: 992px) {
  .target .container {
    display: flex;
    align-items: center;
  }

  .target .lt {
    flex: 0 0 50%;
    max-width: 50%;
    margin-bottom: 0;
  }

  .target .rt {
    flex: 0 0 50%;
    max-width: 50%;
    padding-left: 30px;
  }
}

@media (min-width: 1200px) {
  .target {
    padding: 70px 0;
  }

  .target .rt {
    padding-left: 50px;
  }

  .target .title {
    margin-bottom: 35px;
  }
}

@media (min-width: 1440px) {
  .target .rt {
    padding-left: 70px;
  }
}


/* certificate */
.certificate {
  padding: 30px 0;
  background: #333;
}

.certificate .title {
  color: #fff;
  margin-bottom: 20px;
}

.certificate .sub-info {
  color: #fff;
  line-height: 1.8;
  margin-bottom: 20px;
}

.certificate .swiper-slide {
  text-align: center;
}

.certificate .swiper-pagination {
  width: 100px !important;
  height: 20px;
  display: flex;
  margin-left: auto;
  margin-right: auto;
}

.certificate .swiper-pagination-bullet {
  flex-shrink: 0;
  transition: all .3s;
}

.certificate .swiper-pagination-bullet:not(.swiper-pagination-bullet-active-main) {
  background: #fff;
}

@media (min-width: 768px) {
  .certificate .swiper-wrap {
    position: relative;
  }

  .certificate .prev-btn, .certificate .next-btn {
    width: 50px;
    height: 50px;
    font-size: 50px;
    line-height: 1;
    color: var(--style-color);
  }

  .certificate .prev-btn {
    transform: translate(-50%, -50%);
  }

  .certificate .next-btn {
    transform: translate(50%, -50%);
  }

  .certificate .prev-btn.swiper-button-disabled, .certificate .next-btn.swiper-button-disabled {
    color: #fff;
  }

  .certificate .prev-btn::before, .certificate .next-btn::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 50%;
    width: 60%;
    height: 60%;
    transform: translate(-50%, -50%);
    background-color: #fff;
  }

  .certificate .swiper-button-disabled::before {
    background-color: #333;
  }

  .certificate .prev-btn i, .certificate .next-btn i {
    position: relative;
    z-index: 1;
  }

  .certificate .swiper-pagination {
    display: none;
  }
}

@media (min-width: 1200px) {
  .certificate {
    padding: 41px 0 68px;
  }

  .certificate .title {
    margin-bottom: 40px;
  }

  .certificate .sub-info {
    margin-bottom: 37px;
  }
}

@media (min-width: 1640px) {
  .certificate .title {
    margin-bottom: 50px;
  }
}


/* milestone */
.milestone {
  padding-top: 30px;
  padding-bottom: 30px;
  position: relative;
}

.milestone .title {
  text-align: left;
  padding-left: 15px;
  margin-bottom: 20px;
}

.milestone .swiper-gallery .swiper-slide {
  display: flex;
  align-items: center;
}

.milestone .lt {
  padding: 0 15px;
}

.milestone .lt-title {
  font-family: 'SourceHanSansCN-B';
  margin-bottom: 15px;
}

.milestone .info {
  height: 87px;
  line-height: 1.8;
}

.milestone .rt {
  width: 100%;
  display: none;
}

.milestone .rt {
  position: relative;
  text-align: center;
}

.milestone img:first-child {
  width: 99.8%;
  height: 99.8%;
  object-fit: cover;
}

.milestone .zhezhao {
  position: absolute;
  width: 100%;
  height: 100%;
  left: 0;
  top: 0;
}

/* 底部轮播 */
.milestone .swiper-thumbs {
  position: relative;
  width: 100%;
  margin-top: 20px;
}

.milestone .swiper-thumbs::before {
  display: block;
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  content: '';
  width: 100%;
  height: 2px;
  background: #989898;
  z-index: 1;
}

.milestone .back {
  color: #fff;
  padding: 7px 15px;
  text-align: center;
  background: #333;
  border-radius: 50px;
  cursor: pointer;
}

.milestone .swiper-slide-thumb-active .back {
  background: var(--style-color);
  box-shadow: inset 5px 10px 10px 1px rgba(255, 255, 255, 0.3);
}

@media (min-width: 720px) {
  .milestone .title, .milestone .lt {
    padding-left: calc((100vw - 5px - 720px) / 2 + 15px);
  }
}

@media (min-width: 768px) {
  .milestone {
    padding-top: 0;
  }

  .milestone .title {
    position: absolute;
    left: 0;
    top: 20px;
    z-index: 2;
  }

  .milestone .lt {
    flex: 0 0 42%;
    max-width: 42%;
    padding-top: 30px;
  }

  .milestone .info {
    max-width: 420px;
  }

  .milestone .rt {
    display: block;
    flex: 0 0 58%;
    max-width: 58%;
  }

  .milestone .swiper-thumbs {
    margin-top: 10px;
  }
}

@media (min-width: 992px) {
  .milestone .title, .milestone .lt {
    padding-left: calc((100vw - 5px - 960px) / 2 + 15px);
  }
}

@media (min-width: 1200px) {
  .milestone {
    padding-bottom: 60px;
  }

  .milestone .title {
    top: 70px;
    padding-left: calc((100vw - 5px - 1140px) / 2 + 15px);
  }

  .milestone .lt {
    padding-top: 0;
    padding-left: calc((100vw - 5px - 1140px) / 2 + 15px);
  }

  .milestone .lt-title {
    margin-bottom: 39px;
  }

  .milestone .info {
    height: auto;
    max-width: 470px;
    max-height: 116px;
  }

  .milestone .back {
    padding-top: 12px;
    padding-bottom: 12px;
  }
}

@media (min-width: 1440px) {
  .milestone .title, .milestone .lt {
    padding-left: calc((100vw - 5px - 1400px) / 2 + 15px);
  }
}

@media (min-width: 1640px) {
  .milestone .swiper-thumbs .container {
    max-width: 1512px;
  }

  .milestone .back {
    padding-top: 18px;
    padding-bottom: 18px;
  }
}