.page-about {
  --about-orange: #FF6A00;
  --about-gold: #FFC53D;
  --about-lime: #A3D84B;
  --about-navy: #1B2A4A;
  --about-navy-deep: #0D1B2A;
  --about-muted: #4A5568;
  --about-line: #E2E8F0;
  --about-bg: #F5F7FA;
  --about-ink: #1A202C;
  --about-font-head: "Montserrat", "PingFang SC", "Microsoft YaHei", sans-serif;
  --about-font-body: "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
  --about-font-mono: "JetBrains Mono", "Courier New", monospace;
}

.page-about .about-hero {
  position: relative;
  background: var(--about-navy-deep);
  padding: 48px 20px 72px;
  overflow: hidden;
}

.page-about .about-hero__grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  position: relative;
  z-index: 2;
}

.page-about .about-hero__content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.page-about .about-hero__kicker {
  font-family: var(--about-font-mono);
  font-size: 13px;
  letter-spacing: 0.15em;
  color: var(--about-lime);
  margin: 0 0 20px;
  text-transform: uppercase;
  border-left: 2px solid var(--about-orange);
  padding-left: 12px;
}

.page-about .about-hero__title {
  font-family: var(--about-font-head);
  font-size: 38px;
  line-height: 1.15;
  font-weight: 800;
  color: #ffffff;
  margin: 0 0 18px;
  letter-spacing: -0.01em;
}

.page-about .about-hero__title-mark {
  display: block;
  margin-top: 10px;
  color: var(--about-gold);
  font-size: 22px;
  font-weight: 700;
  padding-left: 14px;
  border-left: 4px solid var(--about-orange);
}

.page-about .about-hero__lead {
  font-size: 16px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.85);
  max-width: 520px;
  margin: 0 0 28px;
  font-family: var(--about-font-body);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-hero__figure {
  margin: 0;
  position: relative;
}

.page-about .about-hero__figure img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  border-radius: 2px;
  border: 1px solid rgba(255, 255, 255, 0.16);
}

.page-about .about-hero__figure figcaption {
  margin-top: 10px;
  color: rgba(255, 255, 255, 0.6);
  font-size: 13px;
  font-family: var(--about-font-mono);
}

.page-about .about-hero__field {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1;
  background:
    linear-gradient(115deg, transparent 0 60%, rgba(255, 106, 0, 0.12) 60% 63%, transparent 63%),
    linear-gradient(0deg, transparent 0 88%, rgba(255, 255, 255, 0.07) 88% 89%, transparent 89%),
    radial-gradient(circle at 85% 25%, rgba(255, 197, 61, 0.1), transparent 220px),
    var(--about-navy-deep);
}

.page-about .about-breadcrumb {
  padding: 20px 20px 4px;
}

.page-about .about-breadcrumb .breadcrumb {
  font-size: 14px;
  color: var(--about-muted);
  font-family: var(--about-font-body);
}

.page-about .about-breadcrumb .breadcrumb a {
  color: var(--about-navy);
  text-decoration: none;
  border-bottom: 1px solid var(--about-line);
  transition: border-color 0.2s ease;
}

.page-about .about-breadcrumb .breadcrumb a:hover {
  border-bottom-color: var(--about-orange);
}

.page-about .about-origin {
  padding: 60px 20px 30px;
}

.page-about .about-origin__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .about-origin__side {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.page-about .about-origin__side .section-kicker {
  font-family: var(--about-font-mono);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--about-orange);
  margin: 0 0 12px;
}

.page-about .about-origin__side .section-title {
  font-family: var(--about-font-head);
  font-size: 30px;
  font-weight: 800;
  color: var(--about-navy);
  margin: 0;
  line-height: 1.25;
  max-width: 300px;
}

.page-about .about-origin__side .section-title::after {
  content: "";
  display: block;
  width: 40px;
  height: 4px;
  background: var(--about-orange);
  margin-top: 16px;
}

.page-about .about-origin__content {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.page-about .about-origin__text {
  font-family: var(--about-font-body);
  font-size: 16px;
  line-height: 1.85;
  color: var(--about-ink);
}

.page-about .about-origin__text p {
  margin: 0 0 16px;
}

.page-about .about-origin__principle {
  background: var(--about-bg);
  border-left: 3px solid var(--about-gold);
  padding: 22px 20px;
  border-radius: 0 2px 2px 0;
}

.page-about .about-origin__principle-label {
  font-family: var(--about-font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--about-muted);
  margin: 0 0 8px;
}

.page-about .about-origin__principle-text {
  font-family: var(--about-font-head);
  font-size: 19px;
  font-weight: 700;
  color: var(--about-navy);
  margin: 0 0 14px;
  line-height: 1.4;
}

.page-about .about-origin__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .about-origin__list li {
  font-family: var(--about-font-body);
  font-size: 14px;
  color: var(--about-muted);
  position: relative;
  padding-left: 18px;
  line-height: 1.6;
}

.page-about .about-origin__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 6px;
  height: 6px;
  background: var(--about-orange);
  border-radius: 1px;
  transform: rotate(45deg);
}

.page-about .about-origin__figure {
  margin: 28px 0 0;
}

.page-about .about-origin__figure img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  border-radius: 2px;
  border: 1px solid var(--about-line);
}

.page-about .about-origin__figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  font-family: var(--about-font-mono);
  color: var(--about-muted);
}

.page-about .about-milestones {
  background: var(--about-bg);
  padding-top: 60px;
  padding-bottom: 60px;
  position: relative;
}

.page-about .about-milestones::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0.5;
  background: repeating-linear-gradient(
    -55deg,
    transparent 0 18px,
    rgba(27, 42, 74, 0.02) 18px 20px
  );
  pointer-events: none;
}

.page-about .about-milestones .container {
  position: relative;
  z-index: 1;
}

.page-about .about-milestones__head {
  padding: 0 20px;
  margin-bottom: 44px;
}

.page-about .about-milestones__head .section-kicker {
  font-family: var(--about-font-mono);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--about-orange);
  margin: 0 0 12px;
}

.page-about .about-milestones__head .section-title {
  font-family: var(--about-font-head);
  font-size: 30px;
  font-weight: 800;
  color: var(--about-navy);
  margin: 0 0 10px;
}

.page-about .about-milestones__head .section-lead {
  font-size: 15px;
  line-height: 1.7;
  color: var(--about-muted);
  max-width: 560px;
  margin: 0;
  font-family: var(--about-font-body);
}

.page-about .about-timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  margin: 0 20px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 76px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(
    180deg,
    var(--about-orange) 0%,
    var(--about-gold) 55%,
    var(--about-lime) 100%
  );
  opacity: 0.35;
}

.page-about .about-timeline__item {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 0;
  position: relative;
  padding-bottom: 36px;
}

.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}

.page-about .about-timeline__index {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  padding-top: 6px;
}

.page-about .about-timeline__year {
  font-family: var(--about-font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--about-navy);
  background: var(--about-bg);
  padding: 2px 0;
  white-space: nowrap;
}

.page-about .about-timeline__dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--about-orange);
  border: 3px solid var(--about-bg);
  box-shadow: 0 0 0 2px var(--about-orange);
  margin-top: 8px;
  flex-shrink: 0;
  position: absolute;
  top: 34px;
  right: -5px;
}

.page-about .about-timeline__panel {
  background: #ffffff;
  border: 1px solid var(--about-line);
  border-left: 0;
  border-radius: 0 2px 2px 0;
  padding: 22px 18px;
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.25s ease;
}

.page-about .about-timeline__panel:hover {
  box-shadow: var(--shadow-float);
}

.page-about .about-timeline__title {
  font-family: var(--about-font-head);
  font-size: 18px;
  font-weight: 700;
  color: var(--about-navy);
  margin: 0 0 8px;
}

.page-about .about-timeline__desc {
  font-family: var(--about-font-body);
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-muted);
  margin: 0 0 12px;
}

.page-about .about-timeline__more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: none;
  padding: 0;
  font-family: var(--about-font-body);
  font-size: 14px;
  font-weight: 600;
  color: var(--about-orange);
  cursor: pointer;
  transition: color 0.2s ease;
}

.page-about .about-timeline__more svg {
  transition: transform 0.25s ease;
}

.page-about .about-timeline__item[data-open] .about-timeline__more svg {
  transform: rotate(45deg);
}

.page-about .about-timeline__detail {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.page-about .about-timeline__detail p {
  font-family: var(--about-font-body);
  font-size: 14px;
  line-height: 1.8;
  color: var(--about-ink);
  border-top: 1px solid var(--about-bg);
  padding-top: 14px;
  margin: 10px 0 0;
}

.page-about .about-timeline__item[data-open] .about-timeline__detail {
  max-height: 800px;
}

.page-about .about-mission {
  background: var(--about-navy);
  padding: 72px 20px;
  position: relative;
  overflow: hidden;
}

.page-about .about-mission::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    120deg,
    transparent 0 65%,
    rgba(255, 106, 0, 0.14) 65% 68%,
    transparent 68%
  );
}

.page-about .about-mission::after {
  content: "";
  position: absolute;
  right: -60px;
  bottom: -60px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: rgba(255, 197, 61, 0.08);
}

.page-about .about-mission__inner {
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.page-about .about-mission .section-kicker {
  font-family: var(--about-font-mono);
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--about-lime);
  margin: 0 0 18px;
}

.page-about .about-mission__title {
  font-family: var(--about-font-head);
  font-size: 38px;
  font-weight: 800;
  line-height: 1.2;
  color: #ffffff;
  margin: 0 0 28px;
  letter-spacing: -0.01em;
}

.page-about .about-mission__note {
  border-left: 3px solid var(--about-gold);
  padding-left: 20px;
  max-width: 420px;
}

.page-about .about-mission__note p {
  font-family: var(--about-font-body);
  font-size: 16px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.8);
  margin: 0;
}

.page-about .about-stats {
  padding: 60px 20px;
  background: var(--about-navy-deep);
}

.page-about .about-stats .section-head {
  margin-bottom: 40px;
}

.page-about .about-stats .section-kicker {
  font-family: var(--about-font-mono);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--about-orange);
  margin: 0 0 12px;
}

.page-about .about-stats .section-title {
  font-family: var(--about-font-head);
  font-size: 30px;
  font-weight: 800;
  color: #ffffff;
  margin: 0;
}

.page-about .about-stats__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-stats__card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 26px 22px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  position: relative;
  transition: background-color 0.25s ease;
}

.page-about .about-stats__card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--about-orange);
  opacity: 0;
  transition: opacity 0.25s ease;
}

.page-about .about-stats__card:hover::before {
  opacity: 1;
}

.page-about .about-stats__card:hover {
  background: rgba(255, 255, 255, 0.07);
}

.page-about .about-stats__num {
  font-family: var(--about-font-head);
  font-size: 36px;
  font-weight: 800;
  color: var(--about-gold);
  line-height: 1.1;
}

.page-about .about-stats__label {
  font-family: var(--about-font-head);
  font-size: 16px;
  font-weight: 700;
  color: #ffffff;
}

.page-about .about-stats__note {
  font-family: var(--about-font-body);
  font-size: 13px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.5);
}

.page-about .about-partners {
  padding: 60px 20px;
}

.page-about .about-partners__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}

.page-about .about-partners__content .section-kicker {
  font-family: var(--about-font-mono);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--about-orange);
  margin: 0 0 12px;
}

.page-about .about-partners__content .section-title {
  font-family: var(--about-font-head);
  font-size: 30px;
  font-weight: 800;
  color: var(--about-navy);
  margin: 0 0 18px;
  line-height: 1.25;
}

.page-about .about-partners__lead {
  font-family: var(--about-font-body);
  font-size: 16px;
  line-height: 1.85;
  color: var(--about-ink);
  margin: 0 0 24px;
}

.page-about .about-partners__list {
  list-style: none;
  padding: 0;
  margin: 0 0 30px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-about .about-partners__list li {
  font-family: var(--about-font-body);
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-muted);
  position: relative;
  padding-left: 26px;
}

.page-about .about-partners__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 12px;
  height: 12px;
  background: var(--about-lime);
  border-radius: 2px;
  transform: rotate(45deg);
}

.page-about .about-partners__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-partners__figure {
  margin: 0;
  position: relative;
}

.page-about .about-partners__figure img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  border-radius: 2px;
  border: 1px solid var(--about-line);
}

.page-about .about-partners__figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  font-family: var(--about-font-mono);
  color: var(--about-muted);
}

@media (min-width: 640px) {
  .page-about .about-hero {
    padding: 64px 32px 80px;
  }

  .page-about .about-stats__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .page-about .about-mission__title {
    font-size: 46px;
  }

  .page-about .about-origin__layout {
    grid-template-columns: 0.8fr 1.2fr;
    gap: 40px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: center;
  }

  .page-about .about-hero__title {
    font-size: 52px;
  }

  .page-about .about-hero__title-mark {
    font-size: 24px;
  }

  .page-about .about-origin {
    padding: 100px 32px 50px;
  }

  .page-about .about-origin__side .section-title {
    font-size: 38px;
  }

  .page-about .about-origin__content {
    gap: 32px;
  }

  .page-about .about-origin__text {
    font-size: 17px;
    column-count: 2;
    column-gap: 40px;
  }

  .page-about .about-origin__figure {
    margin-top: 50px;
  }

  .page-about .about-milestones {
    padding-top: 100px;
    padding-bottom: 100px;
  }

  .page-about .about-milestones__head .section-title {
    font-size: 38px;
  }

  .page-about .about-timeline {
    margin: 0 32px;
    padding-left: 60px;
  }

  .page-about .about-timeline::before {
    left: 0;
  }

  .page-about .about-timeline__item {
    grid-template-columns: 140px 1fr;
    gap: 28px;
  }

  .page-about .about-timeline__year {
    font-size: 15px;
    text-align: right;
    padding-right: 24px;
    background: transparent;
    position: absolute;
    left: 0;
    top: 20px;
    width: 140px;
  }

  .page-about .about-timeline__dot {
    right: auto;
    left: -7px;
    top: 28px;
  }

  .page-about .about-timeline__panel {
    margin-left: 0;
  }

  .page-about .about-mission {
    padding: 104px 32px;
  }

  .page-about .about-mission__title {
    font-size: 54px;
    max-width: 700px;
  }

  .page-about .about-mission__note {
    max-width: 500px;
  }

  .page-about .about-stats {
    padding: 100px 32px;
  }

  .page-about .about-stats .section-title {
    font-size: 38px;
  }

  .page-about .about-stats__grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
  }

  .page-about .about-stats__card {
    padding: 36px 28px;
  }

  .page-about .about-stats__num {
    font-size: 44px;
  }

  .page-about .about-partners {
    padding: 100px 32px;
  }

  .page-about .about-partners__layout {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 56px;
    align-items: center;
  }

  .page-about .about-partners__content .section-title {
    font-size: 38px;
  }
}

.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 26px;
  font-family: var(--about-font-head);
  font-size: 14px;
  font-weight: 700;
  border-radius: 2px;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
  border: 1px solid transparent;
  cursor: pointer;
}

.page-about .btn-primary {
  background: var(--about-orange);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(255, 106, 0, 0.35);
}

.page-about .btn-primary:hover {
  background: #e85f00;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(255, 106, 0, 0.3);
}

.page-about .btn-outline {
  background: transparent;
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.5);
}

.page-about .btn-outline:hover {
  border-color: #ffffff;
  background: rgba(255, 255, 255, 0.06);
  transform: translateY(-2px);
}

.page-about .about-partners .btn-outline {
  color: var(--about-navy);
  border-color: var(--about-navy);
}

.page-about .about-partners .btn-outline:hover {
  background: rgba(27, 42, 74, 0.06);
}