.introduce {
  width: 100%;
  box-sizing: border-box;
  background: #fff;
  padding: 4.16666vw 6.77083vw 5.20833vw 8.33333vw;
}
.introduce-bot {
  display: flex;
}
.video-title {
  font-family: Roboto, Roboto;
  font-weight: 500;
  font-size: 1.66666vw;
  color: #1d1d1d;
  margin-bottom: 2.60416vw;
}
.video-div {
  position: relative;
  width: 41.66666vw;
  height: 23.4375vw;
  margin-right: 4.16666vw;
}
.video-box {
  display: flex;
  flex-direction: column;
  cursor: pointer;
}
.video {
  width: 100%;
  height: 100%;
}

.custom-play-img {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 3.38541vw; /* 根据你的图调整大小 */
  height: 3.38541vw;
  transform: translate(-50%, -50%);
  z-index: 10;
}
.introduce-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: 37.5vw;
  height: 23.4375vw;
}
.introduce-title {
  font-family: Roboto, Roboto;
  font-weight: 500;
  font-size: 1.875vw;
  color: #1d1d1d;
  margin-bottom: 1.66666vw;
}
.introduce-text {
  max-width: 37.5vw;
  font-family: Manrope, Manrope;
  font-weight: 400;
  font-size: 1.25vw;
  color: #1d1d1d;
  line-height: 1.875vw;
}
.statistics {
  width: 100%;
  height: 33.33333vw;
  box-sizing: border-box;
  padding: 9.32291vw 8.33333vw 0;
  display: flex;
  justify-content: space-between;
  background-image: url("../img/aboutUs/statisticsBack.png");
  background-size: 100% 100%;
}
.statistics-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.statistics-img {
  width: 2.5vw;
  height: 2.5vw;
  margin-bottom: 0.41666vw;
}
.statistics-text {
  font-family: Roboto, Roboto;
  font-weight: bold;
  font-size: 0.83333vw;
  color: #ffffff;
  margin-bottom: 2.13541vw;
}
.statistics-num {
  font-family: Roboto, Roboto;
  font-weight: normal;
  font-size: 3.75vw;
  color: #ffffff;
  font-style: italic;
}
.statistics-value {
  max-width: 13.95833vw;
  text-align: center;
  font-family: Roboto, Roboto;
  font-weight: 400;
  font-size: 0.83333vw;
  color: #ffffff;
  line-height: 1.25vw;
}
.statistics-value-other {
  max-width: 9.27083vw;
  text-align: center;
  font-family: Roboto, Roboto;
  font-weight: 400;
  font-size: 0.83333vw;
  color: #ffffff;
  line-height: 1.25vw;
}
.company {
  position: relative;
  width: 100%;
  height: 40.41666vw;
  box-sizing: border-box;
  padding: 5.20833vw 8.33333vw;
  background: #fff;
  display: flex;
}
.company-img {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 28.125vw;
  z-index: 5 !important;
}
.company-item {
  position: relative;
  width: 19.89583vw;
  height: 30vw;
  box-sizing: border-box;
  padding: 2.08333vw 1.66666vw;
  background: #f5f5f5;
  margin-right: 1.25vw;
  display: flex;
  flex-direction: column;
  z-index: 10 !important;
  transition: all 0.5s ease;
}
.company-item:last-child {
  margin-right: 0;
}
.company-icon {
  width: 2.5vw;
  height: 2.5vw;
  margin-bottom: 2.08333vw;
}
.company-title {
  font-family: Roboto, Roboto;
  font-weight: 400;
  font-size: 1.25vw;
  color: #1d1d1d;
  margin-bottom: 1.25vw;
}
.company-text {
  font-family: Roboto, Roboto;
  font-weight: 400;
  font-size: 0.83333vw;
  color: #1d1d1d;
  line-height: 1.25vw;
  transition: color 0.5s ease;
}
.company-item:hover .company-title {
  color: #ffffff;
}
.company-item:hover {
  background: #8d222e;
}

.company-item:hover .company-text {
  color: #ffffff;
}

.milestones {
  width: 100%;
  min-height: 44.21875vw;
  box-sizing: border-box;
  padding-bottom: 5.20833vw;
  background-image: url("../img/aboutUs/milestones-back.png");
  background-size: 100% 100%;
}
.milestones-top {
  padding: 4.16666vw 8.33333vw 2.60416vw;
}
.milestones-title {
  font-family: Roboto, Roboto;
  font-weight: 500;
  font-size: 1.66666vw;
  color: #ffffff;
  margin-bottom: 1.25vw;
}
.milestones-text {
  font-family: Roboto, Roboto;
  font-weight: 400;
  font-size: 1.25vw;
  color: #e3d2d4;
}
.milestones-line {
  width: 100%;
  height: 0.10416vw;
  background: rgba(255, 255, 255, 0.4);
}
.milestones-scroll-box {
  width: 100%;
  box-sizing: border-box;
  padding-left: 8.33333vw;
}
.milestones-scroll {
  display: flex;
  width: 100%;
  overflow-x: auto;
  -ms-overflow-style: none;
}
.milestones-scroll::-webkit-scrollbar {
  display: none;
}
.milestones-item {
  display: flex;
  flex-direction: column;
  padding-top: 3.64583vw;
  margin-right: 2.60416vw;
}
.milestones-item-title {
  font-family: Roboto, Roboto;
  font-weight: normal;
  font-size: 48px;
  color: #ffffff;
  font-style: italic;
  margin-bottom: 2.08333vw;
}
.milestones-item-content {
  position: relative;
  width: 20.83333vw;
  box-sizing: border-box;
  padding: 1.5625vw;
  background: rgba(255, 255, 255, 0.1);
}
.line-box {
  position: absolute;
  top: -8.75vw;
  right: 1.35416vw;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.column-line {
  width: 0.10416vw;
  height: 9.89583vw;
  background: rgba(255, 255, 255, 0.4);
}
.clock-img {
  width: 1.5625vw;
  height: 1.5625vw;
}
.milestones-item-text {
  font-family: Roboto, Roboto;
  font-weight: 400;
  font-size: 1.04166vw;
  color: #fff;
  margin-bottom: 0.83333vw;
}
.milestones-item-value {
  font-family: Roboto, Roboto;
  font-weight: 400;
  font-size: 0.83333vw;
  color: #e3d2d4;
  line-height: 1.25vw;
}
.but-list {
  margin: 4.16666vw auto 0;
  display: flex;
  width: 6.25vw;
  height: 2.70833vw;
  box-sizing: border-box;
  justify-content: space-between;
  align-items: center;
  padding: 0 0.83333vw;
  background: #ffffff;
  border-radius: 0.3125vw;
}
.but-img {
  display: block;
  width: 1.25vw;
  height: 1.25vw;
  cursor: pointer;
}
.certification {
  padding: 5.20833vw 8.33333vw;
}
.certification-title {
  font-family: Roboto, Roboto;
  font-weight: 500;
  font-size: 1.25vw;
  color: #1d1d1d;
  margin-bottom: 1.66666vw;
}
.certification-box {
  display: flex;
  justify-content: space-between;
}
.certification-item {
  width: 26.92708vw;
  box-sizing: border-box;
  padding: 2.5vw 1.45833vw;
  border: 1px solid #d8d8d8;
}
.certification-img {
  width: 5.20833vw;
  height: 3.33333vw;
  margin-bottom: 3.33333vw;
}
.certification-content {
  width: 100%;
  box-sizing: border-box;
  padding-left: 0.625vw;
}
.certification-card-title {
  font-family: Roboto, Roboto;
  font-weight: 500;
  font-size: 1.25vw;
  color: #1d1d1d;
  margin-bottom: 0.83333vw;
}
.certification-text {
  max-width: 23.76041vw;
  font-family: Roboto, Roboto;
  font-weight: 400;
  font-size: 0.83333vw;
  color: #1d1d1d;
  line-height: 1.25vw;
  margin-bottom: 3.33333vw;
}
.certification-link {
  display: flex;
  align-items: center;
}
.link-img {
  width: 1.25vw;
  height: 1.25vw;
  margin-right: 0.625vw;
  background-image: url("../img/aboutUs/link.png");
  background-size: 100% 100%;
  transition: all 0.3s ease;
}
.certification-link:hover .link-img {
  background-image: url("../img/aboutUs/link-hover.png");
}

.certification-link a {
  cursor: pointer;
  font-family: Roboto, Roboto;
  font-weight: 400;
  font-size: 0.83333vw;
  color: #1d1d1d;
}
.certification-link:hover a {
  color: #8d222e;
}