.page-about {
  background: #fafafc;
}
.page-about .site-footer {
  background: #ffffff;
}

/* banner 文字：与解决方案一致 */
.about-hero .page-hero-title {
  font-family: "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: max(32px, calc(60 * var(--px)));
  font-weight: 500; /* HarmonyOS_Sans_SC_Medium */
  font-style: normal;
  text-transform: none;
  text-align: left;
  color: #ffffff;
  line-height: 1.2;
  margin: 0;
  position: relative;
  z-index: 2;
}
.about-hero .page-hero-en {
  font-family: "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: max(28px, calc(50 * var(--px)));
  font-weight: 900; /* HarmonyOS_Sans_SC_Black */
  font-style: normal;
  text-transform: none;
  text-align: left;
  color: #ffffff;
  -webkit-text-stroke: calc(1 * var(--px)) #ffffff;
  text-stroke: calc(1 * var(--px)) #ffffff;
  letter-spacing: 0;
  line-height: normal;
  height: calc(45 * var(--px));
  display: flex;
  align-items: center;
  opacity: 0.3;
  position: relative;
  z-index: 1;
  margin: calc(-20 * var(--px)) 0 calc(48 * var(--px));
}
.about-hero .page-hero-desc {
  font-family: "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: max(14px, calc(16 * var(--px)));
  font-weight: 400; /* HarmonyOS_Sans_SC */
  font-style: normal;
  text-transform: none;
  text-align: left;
  color: #ffffff;
  line-height: calc(30 * var(--px));
  max-width: calc(900 * var(--px));
  margin: 0;
}

.about-intro {
  width: 100%;
  height: calc(820 * var(--px));
  background: #fafafc; /* #FFFAFAFC */
  padding: calc(154 * var(--px)) 0 calc(128 * var(--px)) 0;
  box-sizing: border-box;
}
.about-intro .container {
  height: 100%;
}
.about-intro-grid {
  display: grid;
  grid-template-columns: calc(620 * var(--px)) 1fr;
  gap: calc(80 * var(--px));
  align-items: stretch;
  height: 100%;
}
.about-intro-left {
  height: 100%;
}
.about-intro-right {
  min-width: 0;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.about-label {
  font-family: "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: max(14px, calc(18 * var(--px)));
  font-weight: 500; /* HarmonyOS_Sans_SC_Medium */
  font-style: normal;
  text-transform: none;
  text-align: left;
  color: #000F9E;
  margin-bottom: calc(24 * var(--px));
  line-height: 1;
}
.about-intro-left h2,
.about-history-head h2,
.about-certs-head h2,
.about-strength-head h2 {
  font-family: "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: max(28px, calc(40 * var(--px)));
  font-weight: 500; /* HarmonyOS_Sans_SC_Medium */
  font-style: normal;
  text-transform: none;
  text-align: left;
  color: #111111;
  line-height: calc(56 * var(--px));
  margin: 0;
}
.about-intro-copy p {
  font-family: "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: max(14px, calc(16 * var(--px)));
  font-weight: 400; /* HarmonyOS_Sans_SC */
  font-style: normal;
  text-transform: none;
  color: #333333;
  line-height: calc(30 * var(--px));
  margin: 0 0 calc(20 * var(--px));
  text-align: left;
}
.about-intro-copy p:last-child,
.about-intro-slogan {
  margin-bottom: 0;
}
.about-intro-slogan {
  margin-top: calc(28 * var(--px));
  color: #333333;
  font-weight: 500;
}
.about-stats {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: calc(24 * var(--px));
  width: 100%;
  border-top: none;
  padding-top: 0;
  margin-top: calc(40 * var(--px));
}
.about-stat {
  flex: 1;
  min-width: 0;
}
.about-stat strong {
  display: block;
  font-family: "Gotham Bold", "Gotham", "Barlow", "HarmonyOS Sans SC", sans-serif;
  font-size: max(40px, calc(60 * var(--px)));
  font-weight: 700; /* GothamBold */
  font-style: normal;
  text-transform: none;
  text-align: left;
  color: #000F9E;
  line-height: 1.1;
  margin-bottom: calc(12 * var(--px));
}
.about-stat span {
  display: block;
  font-family: "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: max(14px, calc(16 * var(--px)));
  font-weight: 400; /* HarmonyOS_Sans_SC */
  font-style: normal;
  text-transform: none;
  text-align: left;
  color: #333333;
  line-height: 1.4;
}

.about-history {
  width: 100%;
  min-height: calc(920 * var(--px));
  background: #FFFFFFFF;
  padding: calc(100 * var(--px)) 0 calc(80 * var(--px));
  box-sizing: border-box;
  overflow: hidden;
}
.about-history-head {
  margin-bottom: calc(48 * var(--px));
}
.history-slider {
  position: relative;
  height: calc(640 * var(--px));
  padding: 0 calc(56 * var(--px));
  box-sizing: border-box;
}
.history-axis {
  position: absolute;
  left: calc(56 * var(--px));
  right: calc(56 * var(--px));
  top: 50%;
  height: 1px;
  background: #DDDDDD;
  transform: translateY(-50%);
  z-index: 1;
  pointer-events: none;
}
.history-viewport {
  height: 100%;
  overflow: hidden;
  position: relative;
  z-index: 2;
}
.history-track {
  display: flex;
  align-items: stretch;
  height: 100%;
  gap: calc(36 * var(--px));
  transition: transform 0.5s ease;
  will-change: transform;
}
.history-item {
  position: relative;
  flex: 0 0 calc(240 * var(--px));
  width: calc(240 * var(--px));
  height: 100%;
  display: grid;
  grid-template-rows: 1fr 1fr;
  background: transparent;
  border: none;
  border-radius: 0;
  overflow: visible;
}
.history-half {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  width: 100%;
  box-sizing: border-box;
  min-height: 0;
}
.history-half-top {
  grid-row: 1;
  justify-content: flex-end;
  padding-bottom: calc(24 * var(--px));
}
.history-half-bottom {
  grid-row: 2;
  justify-content: flex-start;
  padding-top: calc(24 * var(--px));
}
.history-year {
  font-family: "Gotham Bold", "Gotham", "Barlow", "HarmonyOS Sans SC", sans-serif;
  font-size: max(28px, calc(40 * var(--px)));
  font-weight: 700;
  font-style: normal;
  text-transform: none;
  text-align: center;
  color: #000F9E;
  line-height: 1.2;
  margin-bottom: calc(12 * var(--px));
}
.history-half p {
  font-family: "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: max(13px, calc(15 * var(--px)));
  font-weight: 400;
  color: #333333;
  line-height: 1.7;
  margin: 0;
  text-align: center;
  max-width: 100%;
}
.history-half img {
  width: 100%;
  height: calc(160 * var(--px));
  object-fit: cover;
  border-radius: calc(10 * var(--px));
  display: block;
}
.history-dot {
  position: absolute;
  left: 50%;
  top: 50%;
  width: calc(12 * var(--px));
  height: calc(12 * var(--px));
  border-radius: 50%;
  background: #000F9E;
  transform: translate(-50%, -50%);
  z-index: 3;
  pointer-events: none;
}
.history-nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 4;
  width: calc(48 * var(--px));
  height: calc(48 * var(--px));
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-sizing: border-box;
  transition: background var(--transition), color var(--transition), opacity var(--transition), box-shadow var(--transition);
  padding: 0;
}
.history-nav-btn svg {
  width: calc(18 * var(--px));
  height: calc(18 * var(--px));
}
.history-nav-prev {
  left: 0;
  background: #FFFFFF;
  box-shadow: 10px 0px 20px 0px rgba(0, 15, 158, 0.1);
  border: 1px solid #EEEEEE;
  color: #000f9e;
}
.history-nav-next {
  right: 0;
  background: #000f9e;
  border: 1px solid #000f9e;
  box-shadow: none;
  color: #ffffff;
}
.history-nav-btn:hover {
  opacity: 0.85;
}

.about-certs {
  padding: calc(129 * var(--px)) 0;
}
.about-certs-head {
  margin-bottom: calc(40 * var(--px));
}
.certs-track {
  display: flex;
  gap: calc(24 * var(--px));
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  /* 上下留白，避免 hover 上浮被裁切 */
  padding: calc(12 * var(--px)) 0 calc(20 * var(--px));
}
.certs-track::-webkit-scrollbar {
  display: none;
}
.cert-card {
  width: calc(270 * var(--px));
  min-width: calc(270 * var(--px));
  flex: 0 0 calc(270 * var(--px));
  height: calc(450 * var(--px));
  background: #FFFFFF;
  border: 1px solid #EEEEEE;
  border-radius: calc(16 * var(--px));
  box-shadow: 0 calc(8 * var(--px)) calc(24 * var(--px)) rgba(0, 15, 158, 0.06);
  padding: calc(28 * var(--px)) calc(24 * var(--px)) calc(24 * var(--px));
  display: flex;
  flex-direction: column;
  align-items: center;
  scroll-snap-align: start;
  box-sizing: border-box;
  transition: transform 0.35s ease, box-shadow 0.35s ease;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
}
.cert-card:hover {
  transform: translateY(calc(-8 * var(--px)));
  box-shadow: 0 calc(16 * var(--px)) calc(36 * var(--px)) rgba(0, 15, 158, 0.12);
}
.cert-card-img {
  flex: 1;
  width: 100%;
  min-height: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.cert-card-img img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  display: block;
  transition: transform 0.35s ease;
}
.cert-card:hover .cert-card-img img {
  transform: scale(1.04);
}
.cert-card-foot {
  width: 100%;
  margin-top: auto;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.cert-card-line {
  width: 100%;
  height: 1px;
  margin-bottom: calc(12 * var(--px));
  background: #DDDDDD;
  border: 1px solid #EEEEEE;
  box-sizing: border-box;
  flex-shrink: 0;
}
.cert-card-name {
  font-family: "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: max(13px, calc(16 * var(--px)));
  font-weight: 400; /* HarmonyOS_Sans_SC */
  font-style: normal;
  text-transform: none;
  text-align: center;
  color: #666666;
  line-height: calc(20 * var(--px));
  width: 100%;
  height: calc(40 * var(--px)); /* 固定两行高，保证各卡文字顶线对齐 */
  margin: 0;
  display: flex;
  align-items: flex-start;
  justify-content: center;
}
.certs-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: calc(28 * var(--px));
  gap: calc(32 * var(--px));
}
.about-certs .home-progress {
  position: relative;
  flex: 1;
  height: calc(2 * var(--px));
  background: #e8eaef;
  border-radius: calc(2 * var(--px));
  overflow: hidden;
}
.about-certs .home-progress i {
  position: absolute;
  left: 0;
  top: 0;
  display: block;
  width: 28%;
  height: 100%;
  background: #000f9e;
  border-radius: calc(2 * var(--px));
  transition: left 0.35s ease;
}
.about-certs .home-sol-arrows {
  display: flex;
  align-items: center;
  gap: calc(16 * var(--px));
  flex-shrink: 0;
}
.about-certs .home-sol-arrow {
  width: calc(52 * var(--px));
  height: calc(52 * var(--px));
  min-width: 40px;
  min-height: 40px;
  border-radius: 50%;
  border: none;
  background: #f5f5f5;
  color: #000f9e;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.25s ease, color 0.25s ease, opacity 0.25s ease;
  padding: 0;
}
.about-certs .home-sol-arrow svg {
  width: calc(18 * var(--px));
  height: calc(18 * var(--px));
  display: block;
  pointer-events: none;
}
.about-certs .home-sol-arrow:hover:not(:disabled) {
  background: #000f9e;
  color: #ffffff;
}
.about-certs .home-sol-arrow:disabled {
  background: #f5f5f5;
  color: #000f9e;
  opacity: 0.4;
  cursor: default;
}

.about-strength {
  background: #ffffff;
  padding: calc(80 * var(--px)) 0;
}
.about-strength-head {
  margin-bottom: calc(40 * var(--px));
}
.strength-grid {
  display: flex;
  align-items: stretch;
  gap: calc(30 * var(--px));
}
.strength-card {
  position: relative;
  width: calc(570 * var(--px));
  flex: 0 0 calc(570 * var(--px));
  height: calc(400 * var(--px));
  border-radius: calc(16 * var(--px));
  overflow: hidden;
  display: block;
  box-sizing: border-box;
}
.strength-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.strength-card:hover img {
  transform: scale(1.05);
}
.strength-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 20, 60, 0.85) 0%, transparent 55%);
}
.strength-card-body {
  position: absolute;
  left: calc(28 * var(--px));
  right: calc(28 * var(--px));
  bottom: calc(32 * var(--px));
  z-index: 1;
}
.strength-card-title {
  font-family: "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: max(18px, calc(24 * var(--px)));
  font-weight: 500; /* HarmonyOS_Sans_SC_Medium */
  font-style: normal;
  text-transform: none;
  text-align: left;
  color: #FFFFFF;
  line-height: 1.35;
  margin: 0 0 calc(10 * var(--px));
}
.strength-card-desc {
  font-family: "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: max(13px, calc(16 * var(--px)));
  font-weight: 400;
  font-style: normal;
  text-transform: none;
  text-align: left;
  color: #FFFFFF;
  line-height: calc(20 * var(--px));
  margin: 0;
}

@media (max-width: 1100px) {
  .about-intro {
    height: auto;
    padding: calc(72 * var(--px)) 0;
  }
  .about-intro .container,
  .about-intro-grid,
  .about-intro-left,
  .about-intro-right {
    height: auto;
  }
  .about-intro-grid {
    grid-template-columns: 1fr;
    gap: calc(32 * var(--px));
  }
  .about-stats {
    flex-wrap: wrap;
  }
  .about-stat {
    flex: 1 1 40%;
  }
  .strength-grid {
    flex-direction: column;
  }
  .strength-card {
    width: 100%;
    flex: 1 1 auto;
    max-width: 100%;
  }
  .about-history {
    min-height: 0;
  }
  .history-slider {
    height: calc(560 * var(--px));
  }
  .history-item {
    flex-basis: calc(200 * var(--px));
    width: calc(200 * var(--px));
  }
  .history-half img {
    height: calc(130 * var(--px));
  }
  .cert-card {
    width: calc(240 * var(--px));
    min-width: calc(240 * var(--px));
    flex-basis: calc(240 * var(--px));
    height: calc(400 * var(--px));
  }
}
@media (max-width: 768px) {
  .about-hero .page-hero-title {
    font-size: 28px;
  }
  .about-hero .page-hero-en {
    height: auto;
    margin: 8px 0 20px;
    font-size: 18px;
    -webkit-text-stroke: 0;
    text-stroke: 0;
  }
  .about-hero .page-hero-desc {
    font-size: 14px;
    line-height: 1.65;
  }
  .about-intro {
    padding: 48px 0;
  }
  .about-intro-left h2,
  .about-history-head h2,
  .about-certs-head h2,
  .about-why-head h2 {
    font-size: 24px;
    line-height: 1.35;
  }
  .about-intro-copy p,
  .about-intro-slogan {
    font-size: 14px;
    line-height: 1.7;
  }
  .about-stats {
    gap: 12px 8px;
  }
  .about-stat {
    flex: 1 1 calc(50% - 8px);
    min-width: 140px;
  }
  .about-stat strong {
    font-size: 28px;
    line-height: 1.15;
  }
  .about-stat span {
    font-size: 13px;
    line-height: 1.4;
  }
  .history-slider {
    height: auto;
    min-height: 360px;
    padding: 0 36px;
  }
  .history-item {
    flex-basis: calc(160 * var(--px));
    width: calc(160 * var(--px));
  }
  .history-half img {
    height: calc(110 * var(--px));
  }
  .cert-card {
    width: calc(200 * var(--px));
    min-width: calc(200 * var(--px));
    flex-basis: calc(200 * var(--px));
    height: calc(340 * var(--px));
  }
  .strength-card {
    padding: 20px 16px;
  }
}