.about_banner {
  max-width: 256rem;
  margin: 0 auto;
  background-image: linear-gradient(to bottom, #edf4f7, var(--bg));
}
.about_banner .flex {
  height: 100vh;
  max-height: 73.9rem;
  min-height: max-content;
  padding: 8rem 0;
}
.about_banner .head {
  width: 50%;
  max-width: 64rem;
  padding-bottom: 0.8%;
}
.about_banner .head p {
  color: rgba(0, 0, 0, 0.54);
}
.about_banner h1 {
  max-width: 53rem;
  padding-top: 1px;
}
.about_banner .line {
  margin-top: 2rem;
}
.about_banner p {
  max-width: 56.5rem;
  margin-top: 2.9rem;
}
.about_banner .btn {
  min-width: 23.6rem;
  margin-top: 3.8rem;
}
.about_intro {
  padding: 13.2rem 0 15.9rem;
}
.about_intro .head {
  display: grid;
  grid-template-columns: 1fr 55.28985507%;
  align-items: start;
  gap: 0 3rem;
}
.about_intro .head h2 {
  max-width: 48.3rem;
  grid-row: span 2;
}
.about_intro .head p {
  grid-column: 2;
}
.about_intro p {
  margin-top: 1rem;
}
.about_intro p + p {
  margin-top: 2.8rem;
}
.about_intro .items {
  margin-top: 5.2rem;
}
.about_intro .items ul {
  display: flex;
  gap: 1.52173913%;
}
.about_intro .items li {
  position: relative;
  flex: 1;
  transition: flex 0.5s;
  overflow: hidden;
  border-radius: 1.5rem;
  padding-bottom: 34.05797101%;
}
.about_intro .items li.active {
  flex: 2.04484305;
}
.about_intro .items li:hover img {
  transform: scale(1.03);
}
.about_intro .items li .img {
  position: absolute;
  width: 100%;
  height: 100%;
  left: 0;
  top: 0;
}
.about_intro .items li .img::after {
  position: absolute;
  width: 100%;
  height: 46.2%;
  left: 0;
  bottom: 0;
  background-image: linear-gradient(to top, #213644 8.76%, transparent 75.6%);
  content: '';
  pointer-events: none;
}
.about_intro .items li .title {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  color: #fff;
  font-size: 2.2rem;
  padding: 2.4rem 3.1rem;
  font-weight: 500;
  letter-spacing: 0.0082em;
}
.about_intro .nums {
  margin-top: 2.9rem;
}
.about_history {
  background-color: var(--bg);
  padding: 14.1rem 0 16.1rem;
}
.about_history .nav {
  margin-top: 3.2rem;
}
.about_history .nav .nav_list {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}
.about_history .nav .nav_item {
  display: block;
  cursor: pointer;
  text-align: center;
  transition: all 0.3s;
  font-size: 2rem;
  font-weight: 600;
  color: #1a2d38;
  border: 1px solid #c1c1c1;
  line-height: 1.2;
  border-radius: 1.2em;
  padding: 0.575em 1em;
  min-width: 6.05em;
}
.about_history .nav .nav_item.active,
.about_history .nav .nav_item:hover {
  background-color: var(--primary);
  border-color: var(--primary);
  color: #Fff;
}
.about_history .grid {
  display: grid;
  grid-template-columns: 1fr 45.14492754%;
  margin-top: 6rem;
}
.about_history .grid > div {
  position: relative;
  overflow: hidden;
}
.about_history .about_history_img_swiper {
  overflow: hidden;
  border-radius: 2.2rem;
}
.about_history .about_history_img_swiper .img {
  padding-bottom: 100%;
}
.about_history .about_history_swiper {
  position: absolute;
  left: 0;
  right: 0;
  top: -0.3rem;
  bottom: 1px;
  max-width: 53.6rem;
  overflow: hidden;
  font-size: 1.5rem;
}
.about_history .about_history_swiper::before {
  position: absolute;
  width: 2px;
  left: 0.7em;
  top: 0.4667em;
  bottom: 0;
  transform: translateX(-50%);
  content: '';
  background-color: #e2e6ea;
}
.about_history .about_history_swiper .swiper-slide {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: start;
  max-height: max-content;
  gap: 3rem;
}
.about_history .about_history_swiper .swiper-slide::before {
  position: relative;
  z-index: 2;
  display: block;
  content: '';
  width: 1em;
  height: 1em;
  border-radius: 50%;
  border: 0.2em solid var(--primary);
  background-color: #fff;
  margin-top: 0.4667em;
}
.about_history .about_history_swiper .swiper-slide.active .info h3 {
  color: var(--primary);
}
.about_history .about_history_swiper .info h3 {
  font-size: 2.8rem;
  font-weight: 600;
  transition: all 0.3s;
}
.about_history .about_history_swiper .info p {
  line-height: 1.6;
  color: var(--text);
  max-width: 48.3rem;
  margin-top: 1.3rem;
}
.about_facility {
  background-color: var(--secondary);
  padding: 14rem 0 15.9rem;
}
.about_facility .items {
  margin-top: 4.9rem;
}
.about_facility .items ul {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.9rem 1.63043478%;
}
.about_facility .items .active .item {
  background-color: #fff;
  border-color: #fff;
}
.about_facility .items .active .item .info h3 {
  color: #1a2d38;
  font-weight: 500;
  letter-spacing: normal;
}
.about_facility .items .active .item .info p {
  color: var(--text);
  font-weight: 400;
  letter-spacing: normal;
}
.about_facility .item {
  display: block;
  height: 100%;
  align-items: flex-start;
  border-radius: 2.6rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background-color: rgba(255, 255, 255, 0.08);
  transition: all 0.3s;
  padding: 8.5393258% 6.5168539% 11.011236%;
}
.about_facility .item .icon {
  width: 5.7rem;
  height: 5.7rem;
  border-radius: 1.2rem;
  background-color: var(--primary);
}
.about_facility .item .icon img {
  transform: scale(0.61403509);
}
.about_facility .item .info {
  margin-top: 4.5rem;
}
.about_facility .item .info h3 {
  font-size: 2.2rem;
  line-height: 1.22;
  color: #fff;
  max-width: 36rem;
  transition: all 0.3s;
  font-weight: 400;
  letter-spacing: 0.0045em;
}
.about_facility .item .info p {
  max-width: 37.6rem;
  transition: all 0.3s;
  margin-top: 1.5rem;
}
.about_certified {
  padding: 6.9rem 0 14.6rem;
}
.about_certified p {
  margin-top: 1.5rem;
}
.about_certified .about_certified_swiper {
  margin-top: 3.7rem;
}
.about_certified .about_certified_swiper .active .pic::after {
  opacity: 1;
}
.about_certified .about_certified_swiper .pic {
  position: relative;
  border-radius: var(--rd);
  border: 1px solid #e2e9f1;
  --rd: 1.8rem;
  padding-bottom: 126.07003891%;
}
.about_certified .about_certified_swiper .pic::after {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  top: 0;
  margin: -0.5px;
  content: '';
  border-radius: var(--rd);
  border: 2px solid var(--primary);
  transition: all 0.3s;
  opacity: 0;
  pointer-events: none;
  box-shadow: var(--shadow);
}
.about_certified .about_certified_swiper .pic .img {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  --h: 143.52941176%;
}
.about_certified .about_certified_swiper .pic .img_ct {
  width: 66.6666667%;
}
.about_certified .about_certified_swiper .pic .img_cv {
  width: 64.31372549%;
  box-shadow: 0 1rem 1rem rgba(188, 188, 188, 0.14);
}
.about_certified .about_certified_swiper .info {
  text-align: center;
  margin-top: 2.1rem;
}
.about_certified .about_certified_swiper .info h3 {
  font-size: 1.8rem;
  font-weight: 500;
  color: #1a2d38;
}
.about_certified .about_certified_swiper .info p {
  font-size: 1.4rem;
  color: var(--text);
  margin-top: 0.6rem;
}
.about_certified .swiper_btns.middle {
  top: 46.4%;
}
.page_production {
  padding: 15.6rem 0 16rem;
}
@media screen and (max-width: 768px) {
  .about_banner .flex {
    height: auto;
    padding: 50px 0;
  }
  .about_banner .head {
    padding: 0;
  }
  .about_intro {
    padding: 50px 0;
  }
  .about_intro .head {
    gap: 0 20px;
  }
  .about_intro .items {
    margin-top: 30px;
  }
  .about_intro .items li {
    border-radius: 10px;
  }
  .about_intro .items li .title {
    font-size: 16px;
    padding: 14px;
  }
  .about_intro .nums {
    margin-top: 30px;
  }
  .about_history {
    padding: 50px 0;
  }
  .about_history .nav {
    margin-top: 20px;
  }
  .about_history .nav .nav_list {
    width: calc(100% + 40px);
    padding: 0 20px;
    margin: 0 -20px;
    flex-wrap: nowrap;
    gap: 14px;
    overflow-x: auto;
  }
  .about_history .nav .nav_list::-webkit-scrollbar {
    display: none;
  }
  .about_history .nav .nav_list li {
    flex-shrink: 0;
  }
  .about_history .nav .nav_item {
    font-size: 14px;
    white-space: nowrap;
  }
  .about_history .grid {
    margin-top: 30px;
  }
  .about_history .about_history_img_swiper {
    border-radius: 10px;
  }
  .about_history .about_history_swiper {
    top: 0;
    bottom: 0;
    font-size: 14px;
    padding-right: 20px;
  }
  .about_history .about_history_swiper .swiper-slide {
    gap: 20px;
  }
  .about_history .about_history_swiper .swiper-slide::before {
    margin-top: 4px;
  }
  .about_history .about_history_swiper .info h3 {
    font-size: 20px;
  }
  .about_history .about_history_swiper .info p {
    line-height: 1.5;
    margin-top: 5px;
  }
  .about_facility {
    padding: 50px 0;
  }
  .about_facility .items {
    margin-top: 30px;
  }
  .about_facility .items ul {
    grid-template-columns: repeat(auto-fill, minmax(min(230px, 100%), 1fr));
    gap: 16px;
  }
  .about_facility .item {
    border-radius: 10px;
    padding: 20px;
  }
  .about_facility .item .icon {
    border-radius: 6px;
    width: 50px;
    height: 50px;
  }
  .about_facility .item .info {
    margin-top: 20px;
  }
  .about_facility .item .info h3 {
    font-size: 20px;
  }
  .about_facility .item .info p {
    margin-top: 10px;
  }
  .about_certified {
    padding: 50px 0;
    overflow: hidden;
  }
  .about_certified .swiper_content {
    overflow: unset;
    padding: 0 20px;
  }
  .about_certified .about_certified_swiper {
    margin-top: 30px;
  }
  .about_certified .about_certified_swiper .pic {
    --rd: 10px;
  }
  .about_certified .about_certified_swiper .info {
    margin-top: 16px;
  }
  .about_certified .about_certified_swiper .info h3 {
    font-size: 16px;
  }
  .about_certified .about_certified_swiper .info p {
    font-size: 13px;
    margin-top: 5px;
  }
  .page_production {
    padding: 50px 0;
  }
}
@media screen and (max-width: 576px) {
  .about_banner.img_bg > picture {
    opacity: 0.4;
  }
  .about_banner .head {
    width: 100%;
  }
  .about_intro .head {
    display: block;
  }
  .about_intro .items ul {
    display: grid;
    gap: 16px;
  }
  .about_intro .items ul li {
    padding-bottom: 51.4254386%;
  }
  .about_history {
    overflow: hidden;
  }
  .about_history .grid {
    display: flex;
    flex-direction: column-reverse;
  }
  .about_history .grid > div {
    overflow: unset;
  }
  .about_history .about_history_swiper {
    position: relative;
    left: unset;
    top: unset;
    bottom: unset;
    right: unset;
    padding: 0;
    overflow: unset;
    margin-top: 30px;
  }
  .about_history .about_history_swiper::before {
    top: 0.7em;
    left: -20px;
    right: -20px;
    width: unset;
    height: 2px;
    transform: translateY(-50%);
  }
  .about_history .about_history_swiper .swiper-slide {
    display: block;
    max-width: 240px;
  }
  .about_history .about_history_swiper .swiper-slide::before {
    margin: 0;
  }
  .about_history .about_history_swiper .info {
    margin-top: 20px;
  }
  .about_facility .items ul {
    margin: 0 -20px;
    padding: 0 20px;
    overflow-x: auto;
    grid-auto-flow: column;
    grid-template-columns: none;
  }
  .about_facility .items ul::-webkit-scrollbar {
    display: none;
  }
  .about_facility .items ul li {
    min-width: 250px;
  }
}