.page-about {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--cream);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* ---------- 首屏 ---------- */
.page-about .hero {
  position: relative;
  padding: 0 0 clamp(40px, 7vw, 80px);
  border-bottom: var(--line);
  overflow: hidden;
}

.page-about .breadcrumb {
  padding: 18px 0 26px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--sage);
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--sage);
}

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

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

.page-about .hero-grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-about .hero-main {
  position: relative;
}

.page-about .eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--terra);
}

.page-about .hero-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(38px, 7.8vw, 92px);
  line-height: 1.04;
  letter-spacing: -0.015em;
}

.page-about .hero-title-top {
  display: block;
  color: var(--pine);
}

.page-about .hero-title-bottom {
  display: block;
  color: var(--terra);
  margin-top: 4px;
}

.page-about .hero-tag {
  display: inline-block;
  margin-top: 22px;
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--pine);
  border: 2px solid var(--pine);
  background: var(--gold-lt);
  transform: rotate(-2deg);
}

.page-about .hero-aside {
  border-left: 4px solid var(--terra);
  padding-left: clamp(18px, 2.6vw, 30px);
}

.page-about .hero-lede {
  margin: 0 0 22px;
  font-size: clamp(16px, 1.7vw, 18px);
  color: var(--ink);
}

.page-about .hero-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  border: var(--line);
  background: var(--cream);
}

.page-about .hero-facts li {
  padding: 14px 12px;
  border-right: 1px solid rgba(26, 27, 24, 0.18);
}

.page-about .hero-facts li:last-child {
  border-right: none;
}

.page-about .hero-facts strong {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(20px, 2.6vw, 30px);
  line-height: 1.1;
  color: var(--pine);
}

.page-about .hero-facts span {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  color: var(--sage);
  letter-spacing: 0.04em;
}

.page-about .hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 通用区块 ---------- */
.page-about .block {
  padding: clamp(44px, 7.5vw, 88px) 0;
}

.page-about .block--pine {
  background: var(--pine);
  color: var(--cream);
}

.page-about .block--terra {
  background: var(--terra);
  color: var(--cream);
}

.page-about .block-head {
  max-width: 760px;
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-about .block-head h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 3.4vw, 42px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .block-head--light h2 {
  color: var(--cream);
}

.page-about .block-head--light .eyebrow {
  color: var(--gold-lt);
}

.page-about .block-lede {
  margin: 0;
  font-size: clamp(15px, 1.6vw, 17px);
  color: var(--sage);
}

.page-about .block-head--light .block-lede {
  color: rgba(244, 239, 231, 0.82);
}

.page-about .text-link {
  display: inline-block;
  margin-top: 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--terra);
  text-decoration: none;
  border-bottom: 2px solid var(--terra);
  padding-bottom: 2px;
}

.page-about .text-link:hover {
  color: var(--pine);
  border-color: var(--pine);
}

/* ---------- 起点与规模 ---------- */
.page-about .origin-layout {
  display: grid;
  gap: clamp(24px, 3.4vw, 44px);
  align-items: start;
}

.page-about .origin-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border: var(--line);
  box-shadow: var(--shadow-hard);
  background: var(--cream);
}

.page-about .stat-cell {
  padding: clamp(16px, 2.2vw, 24px);
  border-right: 1px solid rgba(26, 27, 24, 0.18);
  border-bottom: 1px solid rgba(26, 27, 24, 0.18);
}

.page-about .stat-cell:nth-child(2n) {
  border-right: none;
}

.page-about .stat-cell:nth-last-child(-n + 2) {
  border-bottom: none;
}

.page-about .stat-num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(28px, 4.2vw, 46px);
  line-height: 1.06;
  color: var(--terra);
}

.page-about .stat-label {
  display: block;
  margin-top: 6px;
  font-weight: 700;
  font-size: 14px;
  color: var(--ink);
}

.page-about .stat-note {
  display: block;
  margin-top: 2px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--sage);
}

.page-about .origin-body p {
  margin: 0 0 14px;
  font-size: clamp(15px, 1.6vw, 17px);
}

/* ---------- 认证体系 ---------- */
.page-about .cert-layout {
  display: grid;
  gap: clamp(24px, 3.2vw, 40px);
  align-items: start;
}

.page-about .cert-grid {
  display: grid;
  grid-template-columns: 1fr;
  border: 2px solid rgba(244, 239, 231, 0.34);
}

.page-about .stamp {
  position: relative;
  padding: clamp(20px, 2.6vw, 30px);
  border-bottom: 1px solid rgba(244, 239, 231, 0.24);
}

.page-about .stamp:last-child {
  border-bottom: none;
}

.page-about .stamp::after {
  content: "";
  position: absolute;
  top: 18px;
  right: 18px;
  width: 34px;
  height: 34px;
  border: 2px solid var(--gold);
  border-radius: 50%;
  opacity: 0.7;
}

.page-about .stamp-index {
  display: inline-block;
  margin-bottom: 10px;
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--pine);
  background: var(--gold);
}

.page-about .stamp h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(18px, 2vw, 22px);
  color: var(--cream);
}

.page-about .stamp p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(244, 239, 231, 0.8);
}

.page-about .cert-media {
  margin: 0;
  border: var(--line);
  background: var(--cream);
  padding: 14px;
  box-shadow: var(--shadow-gold);
}

.page-about .cert-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .cert-media figcaption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--sage);
}

/* ---------- 赛区网络 ---------- */
.page-about .network-layout {
  display: grid;
  gap: clamp(24px, 3.4vw, 44px);
  align-items: center;
}

.page-about .network-map {
  border: var(--line);
  background: var(--cream);
  padding: clamp(18px, 2.4vw, 28px);
  box-shadow: var(--shadow-hard-sm);
}

.page-about .map-legend {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  margin-bottom: 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--ink);
}

.page-about .legend-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 2px solid var(--ink);
}

.page-about .legend-dot--home {
  background: var(--pine-mid);
}

.page-about .legend-dot--partner {
  background: var(--terra);
}

.page-about .dot-matrix {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(30px, 1fr));
  gap: 10px;
}

.page-about .map-dot {
  display: block;
  aspect-ratio: 1;
  border-radius: 50%;
  border: 2px solid var(--ink);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.page-about .map-dot--home {
  background: var(--pine-mid);
}

.page-about .map-dot--partner {
  background: var(--terra);
  box-shadow: 0 0 0 3px var(--gold-lt);
}

.page-about .map-dot:hover {
  transform: scale(1.14);
}

.page-about .map-note {
  margin: 16px 0 0;
  font-size: 12px;
  color: var(--sage);
}

.page-about .network-media {
  margin: 0;
  border: var(--line);
  box-shadow: var(--shadow-hard);
  background: var(--cream);
  padding: 12px;
}

.page-about .network-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .network-media figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--sage);
}

/* ---------- 时间线 ---------- */
.page-about .timeline-section .block-head {
  max-width: 680px;
}

.page-about .tl-media {
  margin: 0 0 clamp(26px, 3.4vw, 42px);
  border: var(--line);
  overflow: hidden;
  box-shadow: var(--shadow-hard);
}

.page-about .tl-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .tl-track {
  border-top: 2px solid rgba(244, 239, 231, 0.4);
  padding-top: 24px;
}

.page-about .filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 10px;
  margin-bottom: 28px;
}

.page-about .filter-btn {
  padding: 7px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cream);
  background: transparent;
  border: 2px solid rgba(244, 239, 231, 0.5);
  cursor: pointer;
  transition: background 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

.page-about .filter-btn:hover {
  border-color: var(--gold-lt);
}

.page-about .filter-btn.is-active {
  background: var(--cream);
  color: var(--terra);
  border-color: var(--cream);
  font-weight: 700;
}

.page-about .filter-count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: rgba(244, 239, 231, 0.72);
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 10px;
  bottom: 10px;
  width: 4px;
  background: var(--cream);
  opacity: 0.55;
}

.page-about .tl-item {
  position: relative;
  padding: 0 0 26px 42px;
}

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

.page-about .tl-item[hidden] {
  display: none;
}

.page-about .tl-year {
  display: inline-block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 20px;
  color: var(--gold-lt);
}

.page-about .tl-dot {
  position: absolute;
  left: 0;
  top: 6px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--gold);
  border: 3px solid var(--cream);
  box-shadow: 0 0 0 2px var(--ink);
}

.page-about .tl-body {
  border-left: 2px solid rgba(244, 239, 231, 0.32);
  padding-left: 16px;
}

.page-about .tl-body h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(17px, 2vw, 21px);
  color: var(--cream);
}

.page-about .tl-body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(244, 239, 231, 0.84);
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border: var(--line);
  background: var(--cream);
}

.page-about .team-card {
  padding: clamp(20px, 2.6vw, 28px);
  border-bottom: 1px solid rgba(26, 27, 24, 0.18);
  background: var(--cream);
}

.page-about .team-card:last-child {
  border-bottom: none;
}

.page-about .team-index {
  display: inline-block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--terra);
  border-bottom: 2px solid var(--gold);
  padding-bottom: 3px;
}

.page-about .team-card h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(17px, 2vw, 20px);
  color: var(--pine);
}

.page-about .team-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--sage);
}

/* ---------- 合作生态 ---------- */
.page-about .eco-layout {
  display: grid;
  gap: clamp(26px, 3.6vw, 48px);
  align-items: start;
}

.page-about .eco-bars {
  display: grid;
  gap: 14px;
  padding: clamp(18px, 2.4vw, 26px);
  border: 2px solid rgba(244, 239, 231, 0.34);
  background: rgba(244, 239, 231, 0.05);
}

.page-about .eco-bar {
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr) 44px;
  align-items: center;
  gap: 10px;
}

.page-about .eco-label {
  font-size: 12px;
  color: rgba(244, 239, 231, 0.86);
}

.page-about .eco-track {
  display: block;
  height: 12px;
  background: rgba(244, 239, 231, 0.16);
  border: 1px solid rgba(244, 239, 231, 0.28);
}

.page-about .eco-fill {
  display: block;
  height: 100%;
}

.page-about .eco-fill--1 { background: var(--terra-lt); }
.page-about .eco-fill--2 { background: var(--gold); }
.page-about .eco-fill--3 { background: var(--rank-3); }
.page-about .eco-fill--4 { background: var(--pine-mid); }

.page-about .eco-value {
  font-family: var(--font-mono);
  font-size: 13px;
  text-align: right;
  color: var(--gold-lt);
}

.page-about .eco-ways {
  display: grid;
  gap: 18px;
}

.page-about .eco-way {
  padding-left: 16px;
  border-left: 3px solid var(--gold);
}

.page-about .eco-way h3 {
  margin: 0 0 5px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  color: var(--cream);
}

.page-about .eco-way p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(244, 239, 231, 0.82);
}

.page-about .eco-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 24px;
  margin-top: clamp(28px, 4vw, 44px);
  padding-top: clamp(20px, 2.6vw, 28px);
  border-top: 1px solid rgba(244, 239, 231, 0.28);
}

.page-about .eco-cta p {
  margin: 0;
  font-size: clamp(15px, 1.7vw, 17px);
  color: var(--cream);
}

.page-about .eco-cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .cert-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .stamp {
    border-right: 1px solid rgba(244, 239, 231, 0.24);
  }

  .page-about .stamp:nth-child(2n) {
    border-right: none;
  }

  .page-about .stamp:nth-last-child(-n + 2) {
    border-bottom: none;
  }

  .page-about .team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .team-card {
    border-right: 1px solid rgba(26, 27, 24, 0.18);
  }

  .page-about .team-card:nth-child(2n) {
    border-right: none;
  }

  .page-about .team-card:nth-last-child(-n + 2) {
    border-bottom: none;
  }
}

@media (min-width: 780px) {
  .page-about .timeline::before {
    left: 92px;
  }

  .page-about .tl-item {
    padding: 0 0 34px 132px;
  }

  .page-about .tl-year {
    position: absolute;
    left: 0;
    top: 4px;
    width: 76px;
    text-align: right;
    margin-bottom: 0;
    font-size: 24px;
  }

  .page-about .tl-dot {
    left: 81px;
    top: 8px;
  }

  .page-about .tl-body {
    border-left: none;
    padding-left: 0;
  }
}

@media (min-width: 900px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: clamp(28px, 4vw, 64px);
  }

  .page-about .origin-layout {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  }

  .page-about .cert-layout {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  }

  .page-about .network-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
  }

  .page-about .eco-layout {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  }

  .page-about .team-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .team-card {
    border-right: 1px solid rgba(26, 27, 24, 0.18);
  }

  .page-about .team-card:nth-child(2n) {
    border-right: 1px solid rgba(26, 27, 24, 0.18);
  }

  .page-about .team-card:nth-child(3n) {
    border-right: none;
  }

  .page-about .team-card:nth-last-child(-n + 2) {
    border-bottom: 1px solid rgba(26, 27, 24, 0.18);
  }

  .page-about .team-card:nth-last-child(-n + 3) {
    border-bottom: none;
  }

  .page-about .team-card--wide {
    grid-column: span 2;
  }
}

@media (min-width: 1040px) {
  .page-about .cert-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .map-dot,
  .page-about .breadcrumb a,
  .page-about .filter-btn {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>