.aboutPage4 {
  overflow: hidden;
  background: #ffffff;
}
.sectionTitle {
  text-align: center;
}

.sectionTitle h2 {
  position: relative;
  font-family:
    Source Han Sans CN,
    Source Han Sans CN;
  font-weight: 500;
  font-size: 0.5rem;
  color: #000000;
  line-height: 1;
}

.sectionTitle p {
  width: 9.35rem;
  max-width: 100%;
  margin: 0.36rem auto 0;
  font-family:
    Source Han Sans CN,
    Source Han Sans CN;
  font-weight: 400;
  font-size: 0.16rem;
  color: #727272;
  line-height: 0.34rem;
}

.companyIntro {
  padding: 0.65rem 0 1rem;
  background-image: url(../images/about/bg2.png);
  background-color: #fff;
  background-size: cover;
  background-repeat: no-repeat;
}

.introVideo {
  position: relative;
  width: 9.55rem;
  height: 5.37rem;
  margin: 0.71rem auto 0;
  overflow: hidden;
  border-radius: 0.6rem 0 0.6rem 0;
  cursor: pointer;
}

.introVideo video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.introVideo__play {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  z-index: 10;
}

.introVideo__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;

  left: 0;
  top: 0;
}

.videoLine {
  width: 9.51rem;
  height: 0.4rem;
  margin: 0.2rem auto 0;
  display: block;
}

.introStats {
  display: flex;
  gap: 0.23rem;
}

.aboutStats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.23rem;
  margin-top: 0.3rem;
}

.aboutStat {
  height: 2.25rem;
  padding-top: 0.38rem;
  text-align: center;
  border-radius: 0.14rem;
}

.aboutStat strong {
  display: block;
  font-family: Oswald, Oswald;
  font-weight: 600;
  font-size: 0.8rem;
  color: var(--color);
}

.aboutStat strong em {
  font-style: normal;
  font-size: 0.41rem;
  vertical-align: 0.3rem;
}

.statFlex {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.12rem;
}

.statFlex > img {
  width: 0.25rem;
  height: 0.25rem;
}

.aboutStat .statFlex span {
  display: block;
  font-family:
    Source Han Sans CN,
    Source Han Sans CN;
  font-weight: 400;
  font-size: 0.2rem;
  color: #000000;
}

.historySection {
  position: relative;
  padding: 1.13rem 0 0.73rem;
  overflow: hidden;
  background: url("../images/about/bg1.png") center center / cover no-repeat;
}

.historySwiper {
  width: 100%;
  margin-top: 2.15rem;
  margin-left: 0;
  overflow: visible;
}

.historyCard {
  width: 5.08rem;
  height: 2.68rem;
  padding: 0.4rem 0.56rem 0;
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(0.1rem);
  border: 0.01rem solid #c8cfd5;
  border-radius: 0.12rem;
  box-shadow: none;
}

.historyCard.swiper-slide-active,
.historyCard:hover {
  background: url(../images/about/bg3.png);
  background-color: #fff;
  background-size: cover;
  background-repeat: no-repeat;
  backdrop-filter: blur(0rem);
  border-color: transparent;
  box-shadow: 0 0.12rem 0.28rem rgba(55, 76, 98, 0.14);
}

.historyCard strong {
  display: block;
  margin-bottom: 0.23rem;
  font-family:
    Source Han Sans CN,
    Source Han Sans CN;
  font-weight: 500;
  font-size: 0.4rem;
  color: #e50011;
}

.historyCard p {
  max-width: 3.7rem;
  font-family:
    Source Han Sans CN,
    Source Han Sans CN;
  font-weight: 500;
  font-size: 0.16rem;
  color: #727272;
  line-height: 0.22rem;
}

.historyThumbSwiper {
  position: relative;
  width: 17.2rem;
  max-width: calc(100% - 1.6rem);
  height: 1.16rem;
  margin: 0.52rem auto 0;
  padding: 0;
  overflow: hidden;
}

.historyThumbSwiper::before {
  display: none;
}

.historyThumb {
  position: relative;
  height: 1.16rem;
  margin: 0 !important;
  background: none;
  opacity: 1;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  cursor: pointer;
}

.historyThumb i {
  position: absolute;
  top: 0.67rem;
  width: calc(50% - 0.28rem);
  height: 0.2rem;
  background: repeating-linear-gradient(
    90deg,
    #9fa8b1 0 0.02rem,
    transparent 0.02rem 0.16rem
  );
  pointer-events: none;
}

.historyThumb i:first-child {
  left: 0;
}

.historyThumb i:last-child {
  right: 0;
}

.historyThumb b {
  content: "";
  position: absolute;
  left: 50%;
  top: 0.66rem;
  z-index: 3;
  width: 0.12rem;
  height: 0.12rem;
  border: 0.02rem solid #ed0012;
  background: #ffffff;
  border-radius: 50%;
  transform: translateX(-50%);
}

.historyThumb.swiper-slide-thumb-active::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0.32rem;
  z-index: 2;
  width: 0.02rem;
  height: 0.76rem;
  background: #ed0012;
  transform: translateX(-50%);
}

.historyThumb.swiper-slide-thumb-active b {
  width: 0.18rem;
  height: 0.18rem;
  border-color: #ed0012;
  background: #ed0012;
} 

.historyThumb em {
  position: relative;
  display: block;
  font-style: normal;
  font-family:
    Source Han Sans CN,
    Source Han Sans CN;
  font-weight: 500;
  font-size: 0.2rem;
  color: #000000;
  transform: none;
}

.historyThumb.swiper-slide-thumb-active em::before,
.historyThumb.swiper-slide-thumb-active em::after {
  content: "";
  position: absolute;
  top: 0.05rem;
  width: 0;
  height: 0;
  border-top: 0.07rem solid transparent;
  border-bottom: 0.07rem solid transparent;
}

.historyThumb.swiper-slide-thumb-active em::before {
  left: -0.28rem;
  border-right: 0.09rem solid #ed0012;
}

.historyThumb.swiper-slide-thumb-active em::after {
  right: -0.28rem;
  border-left: 0.09rem solid #ed0012;
}

.strengthSection {
  padding: 0.87rem 0 2.02rem;
  background: #ffffff;
}

.strengthSection .sectionTitle h2 {
  font-size: 0.4rem;
}

.strengthSection .sectionTitle p {
  width: 7.3rem;
  margin-top: 0.33rem;
}

.strengthWrap {
  position: relative;
  width: 100%;
  max-width: 100%;
  margin: 1rem auto 0;
  padding: 0 0;
}

.strengthVisual {
  display: block;
  width: 100%;
  height: 6.97rem;
  object-fit: cover;
  border-radius: 0.92rem 0 0.92rem 0;
}

.strengthCard {
  position: absolute;
  left: 1.03rem;
  top: 2.55rem;
  z-index: 2;
  width: 5.88rem;
  height: 5.44rem;
  background: rgba(255, 255, 255, 0.93);
  box-shadow: 0rem 0rem 0.3rem 0.01rem rgba(0, 0, 0, 0.16);
  border-radius: 0rem 0.5rem 0rem 0.5rem;
  padding: 0.92rem 0;
}

.strengthSwiper {
  overflow: hidden;
}

.strengthSwiper .swiper-slide {
  padding: 0 0.77rem;
}

.strengthText h3 {
  margin-bottom: 0.53rem;
  font-family:
    Source Han Sans CN,
    Source Han Sans CN;
  font-weight: 500;
  font-size: 0.4rem;
  color: #000000;
  line-height: 1;
}

.strengthText p {
  width: 4.15rem;
  font-size: 0.14rem;
  color: #666666;
  line-height: 0.28rem;
}

.strengthControls {
  position: absolute;
  left: 0.78rem;
  bottom: 0.72rem;
  z-index: 5;
  display: flex;
  gap: 0.16rem;
}

.strengthArrow {
  position: relative;
  width: 0.45rem;
  height: 0.45rem;
  background: #ffffff;
  border: 0.01rem solid #e20b20;
  border-radius: 50%;
  background: #ffffff;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: all 0.6s;
}

.strengthArrow img {
  width: 0.08rem;
  height: 0.14rem;
}

.strengthArrow:hover {
  background: var(--color);
}
.strengthNext img {
  transform: rotate(180deg);
}

.strengthArrow:hover img {
  filter: brightness(0) invert(1);
}

.strengthPage {
  position: absolute;
  left: 10.71rem !important;
  bottom: -0.68rem !important;
  width: fit-content !important;
  display: flex;
  justify-content: center;
  gap: 0.13rem;
}

.strengthPage .swiper-pagination-bullet {
  width: 0.12rem;
  height: 0.12rem;
  margin: 0 !important;
  background: #ffffff;
  border: 0.01rem solid #ed0012;
  opacity: 1;
}

.strengthPage .swiper-pagination-bullet-active {
  background: #ed0012;
}

.factoryGallery {
  padding: 1.4rem 0 1.31rem;
  background: #f5f5f5;
}

.factoryGallery__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.13rem;
}

.factoryItem {
  display: block;
  text-align: center;
}

.factoryItem__imgWrap {
  width: 100%;
  height: 2.63rem;
  overflow: hidden;
  border-radius: 0.14rem;
}

.factoryItem__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: all 0.3s;
}

.factoryItem:hover .factoryItem__img {
  transform: scale(1.05);
}

.factoryItem span {
  display: block;
  font-family:
    Source Han Sans CN,
    Source Han Sans CN;
  font-weight: 500;
  font-size: 0.16rem;
  color: #727272;
  margin-top: 0.26rem;
}

@media (max-width: 1024px) {
  .insideBanner__inner {
    max-width: calc(100% - 0.48rem);
  }

  .introStats,
  .factoryGallery__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.4rem;
  }

  .introVideo {
    width: 100%;
  }

  .strengthVisual {
    width: 100%;
    height: 4.2rem;
    border-radius: 0.32rem;
  }

  .strengthCard {
    position: relative;
    left: auto;
    top: auto;
    width: calc(100% - 0.72rem);
    margin: -0.8rem auto 0;
  }
}

@media (max-width: 560px) {
  .insideBanner {
    height: 3.8rem;
  }

  .innerBread {
    height: auto;
  }

  .innerBread__inner {
    align-items: flex-start;
    flex-direction: column;
    padding: 0.2rem 0;
    gap: 0.18rem;
  }

  .introStats,
  .factoryGallery__grid {
    grid-template-columns: 1fr;
  }

  .introVideo {
    height: 3.9rem;
    border-radius: 0.24rem 0 0.24rem 0;
  }
}

/* responsive refinement */
@media (max-width: 1024px) {
  .companyIntro,
  .historySection,
  .strengthSection,
  .factoryGallery {
    padding-top: 0.72rem;
    padding-bottom: 0.82rem;
  }

  .sectionTitle h2,
  .strengthSection .sectionTitle h2 {
    font-size: 0.44rem;
  }

  .sectionTitle p,
  .strengthSection .sectionTitle p {
    width: 100%;
    margin-top: 0.24rem;
    font-size: 0.22rem;
    line-height: 1.75;
  }

  .introVideo {
    width: 100%;
    height: 4.6rem;
    margin-top: 0.48rem;
    border-radius: 0.36rem 0 0.36rem 0;
  }

  .videoLine {
    width: 100%;
    height: auto;
  }

  .aboutStats {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.18rem;
  }

  .aboutStat {
    height: auto;
    min-height: 1.85rem;
    padding: 0.28rem 0.12rem;
  }

  .aboutStat strong {
    font-size: 0.64rem;
  }

  .aboutStat .statFlex span {
    font-size: 0.22rem;
  }

  .historySwiper {
    margin-top: 0.72rem;
  }

  .historyCard {
    width: 4.8rem;
    height: auto;
    min-height: 2.35rem;
    padding: 0.34rem 0.38rem;
  }

  .historyCard strong {
    font-size: 0.36rem;
  }

  .historyCard p {
    max-width: none;
    font-size: 0.22rem;
    line-height: 1.6;
  }

  .historyThumbSwiper {
    width: calc(100% - 0.48rem);
    max-width: none;
  }

  .strengthWrap {
    margin-top: 0.62rem;
  }

  .strengthVisual {
    height: 4.5rem;
  }

  .strengthCard {
    width: calc(100% - 0.48rem);
    height: auto;
    min-height: 4.2rem;
    padding: 0.6rem 0 1rem;
  }

  .strengthSwiper .swiper-slide {
    padding: 0 0.48rem;
  }

  .strengthText h3 {
    margin-bottom: 0.28rem;
    font-size: 0.36rem;
  }

  .strengthText p {
    width: 100%;
    font-size: 0.22rem;
    line-height: 1.75;
  }

  .strengthControls {
    left: 0.48rem;
    bottom: 0.44rem;
  }

  .strengthPage {
    position: static;
    width: 100% !important;
    margin-top: 0.32rem;
  }

  .factoryGallery__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.24rem;
  }

  .factoryItem__imgWrap {
    height: 2.5rem;
  }

  .factoryItem span {
    margin-top: 0.18rem;
    font-size: 0.22rem;
  }
}

@media (max-width: 560px) {
  .companyIntro,
  .historySection,
  .strengthSection,
  .factoryGallery {
    padding-top: 0.56rem;
    padding-bottom: 0.64rem;
  }

  .sectionTitle h2,
  .strengthSection .sectionTitle h2 {
    font-size: 0.4rem;
  }

  .sectionTitle p,
  .strengthSection .sectionTitle p {
    font-size: 0.24rem;
    line-height: 1.7;
  }

  .introVideo {
    height: 3.6rem;
    margin-top: 0.36rem;
  }

  .introVideo__play {
    width: 0.6rem;
    height: 0.6rem;
  }

  .videoLine {
    margin-top: 0.14rem;
  }

  .aboutStats {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.16rem;
  }

  .aboutStat {
    min-height: 1.7rem;
    padding-top: 0.22rem;
  }

  .aboutStat strong {
    font-size: 0.52rem;
  }

  .aboutStat strong em {
    font-size: 0.28rem;
    vertical-align: 0.18rem;
  }

  .statFlex > img {
    width: 0.22rem;
    height: 0.22rem;
  }

  .aboutStat .statFlex span {
    font-size: 0.22rem;
  }

  .historySwiper {
    margin-top: 0.48rem;
  }

  .historyCard {
    width: 5.3rem;
    min-height: 2.28rem;
    padding: 0.3rem;
  }

  .historyCard strong {
    margin-bottom: 0.16rem;
    font-size: 0.34rem;
  }

  .historyCard p {
    font-size: 0.24rem;
  }

  .historyThumbSwiper {
    width: calc(100% - 0.32rem);
    height: 1rem;
    margin-top: 0.34rem;
  }

  .historyThumb {
    height: 1rem;
  }

  .historyThumb em {
    font-size: 0.22rem;
  }

  .strengthVisual {
    height: 3.2rem;
    border-radius: 0.22rem;
  }

  .strengthCard {
    width: calc(100% - 0.28rem);
    min-height: 3.9rem;
    margin-top: -0.48rem;
    border-radius: 0 0.28rem 0 0.28rem;
    padding: 0.46rem 0 0.92rem;
  }

  .strengthSwiper .swiper-slide {
    padding: 0 0.3rem;
  }

  .strengthText h3 {
    font-size: 0.32rem;
  }

  .strengthText p {
    font-size: 0.24rem;
  }

  .strengthControls {
    left: 0.3rem;
    bottom: 0.34rem;
  }

  .factoryGallery__grid {
    grid-template-columns: 1fr;
    gap: 0.26rem;
  }

  .factoryItem__imgWrap {
    height: 3.2rem;
  }

  .factoryItem span {
    font-size: 0.24rem;
  }
}

@media (max-width: 560px) {
  .sectionTitle p,
  .aboutStat .statFlex span,
  .historyCard p,
  .historyThumb em,
  .strengthText p,
  .factoryItem span {
    font-size: 0.24rem;
  }
}