.page-about {
  --about-pad: clamp(18px, 3vw, 34px);
  --about-track: 2px;
  background: var(--pitch-800);
  color: var(--paper);
}

.page-about .breadcrumb {
  padding-block: 18px 0;
}

.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--sand);
}

.page-about .breadcrumb__list li + li::before {
  content: "/";
  margin-right: 6px;
  color: rgba(216, 205, 187, 0.45);
}

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

.page-about .breadcrumb__list a:hover,
.page-about .breadcrumb__list a:focus-visible {
  border-bottom-color: var(--cyan);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(26px, 4vw, 44px) clamp(42px, 6vw, 80px);
  border-bottom: 1px solid var(--line);
  background-image: repeating-linear-gradient(
    112deg,
    rgba(45, 225, 194, 0.05) 0 1px,
    transparent 1px 11px
  );
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 52px);
  align-items: end;
}

.page-about .about-hero__copy h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(38px, 7.4vw, 84px);
  line-height: 0.96;
  letter-spacing: -0.012em;
  color: var(--paper);
}

.page-about .about-hero__copy .lede {
  max-width: 60ch;
  color: var(--sand);
  font-size: clamp(15px, 1.55vw, 17px);
  line-height: 1.8;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), calc(100% - 30px) 100%, 0 100%);
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 12px;
  background: var(--pitch-700);
}

.page-about .about-stat__num {
  font-family: var(--font-num);
  font-size: clamp(26px, 4.6vw, 44px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stat__label {
  font-size: 12px;
  line-height: 1.45;
  color: var(--sand);
}

/* ---------- 品牌起点 ---------- */
.page-about .about-origin {
  position: relative;
  isolation: isolate;
  padding-block: clamp(48px, 7vw, 96px);
  background: var(--ink-950);
  border-block: 1px solid var(--line);
}

.page-about .about-origin__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: cover;
  opacity: 0.42;
  filter: saturate(0.85);
}

.page-about .about-origin::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(100deg, rgba(7, 23, 19, 0.94) 12%, rgba(7, 23, 19, 0.6) 62%, rgba(7, 23, 19, 0.9) 100%);
}

.page-about .about-origin__inner h2 {
  max-width: 20ch;
  margin: 0 0 24px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 4.4vw, 54px);
  line-height: 1.02;
  letter-spacing: -0.01em;
}

.page-about .about-origin__cols {
  display: grid;
  gap: 18px;
  grid-template-columns: minmax(0, 1fr);
  max-width: 96ch;
}

.page-about .about-origin__cols p {
  margin: 0;
  color: var(--sand);
  font-size: clamp(15px, 1.5vw, 16.5px);
  line-height: 1.85;
}

.page-about .about-origin__cols p::first-letter {
  color: var(--paper);
}

/* ---------- 赛事覆盖 ---------- */
.page-about .about-coverage__head {
  display: grid;
  gap: 16px;
  grid-template-columns: minmax(0, 1fr);
  margin-bottom: clamp(24px, 3.4vw, 40px);
}

.page-about .about-coverage__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 4.2vw, 52px);
  line-height: 1.03;
  letter-spacing: -0.01em;
}

.page-about .about-coverage__head .lede {
  color: var(--sand);
  max-width: 56ch;
}

.page-about .about-sports {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 clamp(24px, 3.4vw, 38px);
  padding: 0;
  list-style: none;
}

.page-about .about-sport {
  padding: 7px 14px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--paper);
  background: rgba(18, 58, 49, 0.7);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .about-sport:hover,
.page-about .about-sport:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
  transform: translateY(-2px);
}

.page-about .about-sport--more {
  border-style: dashed;
  color: var(--cyan);
  border-color: rgba(45, 225, 194, 0.5);
}

.page-about .about-coverage__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-metric {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: var(--about-pad);
  background: var(--pitch-700);
  transition: background 0.25s var(--ease);
}

.page-about .about-metric:hover {
  background: #16463b;
}

.page-about .about-metric__num {
  font-family: var(--font-num);
  font-size: clamp(34px, 5.4vw, 58px);
  font-weight: 700;
  line-height: 1;
  color: var(--paper);
  font-variant-numeric: tabular-nums;
}

.page-about .about-metric__num small {
  font-size: 0.42em;
  margin-left: 2px;
  color: var(--cyan);
}

.page-about .about-metric__label {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-about .about-metric__note {
  margin: 4px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--sand);
}

/* ---------- 数据值守流程 ---------- */
.page-about .about-flow {
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(18, 58, 49, 0) 0%, rgba(18, 58, 49, 0.55) 100%);
}

.page-about .about-flow__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}

.page-about .about-flow__main h2 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 4.2vw, 52px);
  line-height: 1.03;
  letter-spacing: -0.01em;
}

.page-about .about-flow__main .lede {
  color: var(--sand);
  max-width: 58ch;
}

.page-about .about-flow__steps {
  display: grid;
  gap: 14px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-step {
  position: relative;
  padding: 18px 20px 18px 24px;
  background: rgba(14, 42, 36, 0.92);
  border-left: 3px solid var(--orange);
  transition: transform 0.25s var(--ease), background 0.25s var(--ease);
}

.page-about .about-step:hover {
  transform: translateX(4px);
  background: rgba(22, 70, 59, 0.95);
}

.page-about .about-step__num {
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-about .about-step h3 {
  margin: 6px 0 8px;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-about .about-step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--sand);
}

.page-about .about-flow__media {
  margin: 0;
}

.page-about .about-flow__media .media-frame {
  border: 1px solid var(--line-strong);
  overflow: hidden;
}

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

.page-about .about-flow__media .media-caption {
  margin-top: 12px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--sand);
  border-left: 2px solid var(--cyan);
  padding-left: 10px;
}

/* ---------- 版本演进 ---------- */
.page-about .about-versions {
  border-top: 1px solid var(--line);
}

.page-about .about-versions__head {
  margin-bottom: clamp(26px, 3.6vw, 44px);
}

.page-about .about-versions__head h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 4.2vw, 52px);
  line-height: 1.03;
  letter-spacing: -0.01em;
  max-width: 22ch;
}

.page-about .about-versions__head .lede {
  color: var(--sand);
  max-width: 56ch;
}

.page-about .about-rail__list {
  position: relative;
  display: grid;
  gap: clamp(16px, 2.4vw, 26px);
  margin: 0;
  padding: 0 0 0 46px;
  list-style: none;
}

.page-about .about-rail__list::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 14px;
  bottom: 14px;
  width: var(--about-track);
  background: linear-gradient(180deg, var(--orange) 0%, var(--cyan) 55%, rgba(167, 243, 228, 0.12) 100%);
}

.page-about .about-rail__item {
  position: relative;
  outline: none;
}

.page-about .about-rail__item:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 6px;
}

.page-about .about-rail__marker {
  position: absolute;
  left: -46px;
  top: 2px;
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  background: var(--ink-950);
  border: 2px solid var(--orange);
  color: var(--orange);
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease);
}

.page-about .about-rail__item:hover .about-rail__marker,
.page-about .about-rail__item:focus-visible .about-rail__marker {
  border-color: var(--cyan);
  color: var(--cyan);
}

.page-about .about-rail__panel {
  padding: 20px var(--about-pad);
  border: 1px solid var(--line);
  background: var(--pitch-700);
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-about .about-rail__item:hover .about-rail__panel,
.page-about .about-rail__item:focus-visible .about-rail__panel {
  border-color: var(--cyan);
  transform: translateX(4px);
  box-shadow: var(--shadow-lift);
}

.page-about .about-rail__panel h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(21px, 2.6vw, 30px);
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-about .about-rail__panel p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--sand);
}

.page-about .about-rail__item--narrow .about-rail__panel {
  border-left: 3px solid var(--cyan);
}

/* ---------- 团队（暖纸色插页） ---------- */
.page-about .about-team {
  background: var(--pitch-800);
}

.page-about .about-team__panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.6vw, 48px);
  padding: clamp(24px, 4vw, 52px);
  background: var(--paper);
  color: var(--pitch-800);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 36px), calc(100% - 36px) 100%, 0 100%);
}

.page-about .about-team__lead h2 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 4.2vw, 50px);
  line-height: 1.02;
  letter-spacing: -0.01em;
  color: var(--pitch-800);
}

.page-about .about-team__lead .eyebrow {
  color: #8a3d12;
}

.page-about .about-team__lead p {
  margin: 0 0 22px;
  font-size: 15px;
  line-height: 1.85;
  color: #23423a;
  max-width: 52ch;
}

.page-about .about-team__roles {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
  align-content: start;
}

.page-about .about-role {
  padding-left: 16px;
  border-left: 3px solid var(--orange);
}

.page-about .about-role h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 700;
  color: var(--pitch-800);
}

.page-about .about-role p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: #2d4c43;
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  padding-block: clamp(40px, 6vw, 88px);
  background: var(--ink-900);
  border-block: 1px solid var(--line);
}

.page-about .about-partners__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  align-items: center;
}

.page-about .about-partners__copy h2 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 4.2vw, 50px);
  line-height: 1.03;
  letter-spacing: -0.01em;
  max-width: 24ch;
}

.page-about .about-partners__copy p {
  margin: 0 0 14px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--sand);
  max-width: 56ch;
}

.page-about .about-partners__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-about .about-partners__map {
  position: relative;
  border: 1px solid var(--line-strong);
  background: var(--pitch-800);
  overflow: hidden;
}

.page-about .about-partners__map img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  opacity: 0.3;
}

.page-about .about-net {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.page-about .about-net__core {
  text-anchor: middle;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 700;
  fill: var(--ink-950);
}

.page-about .about-net__label {
  text-anchor: middle;
  font-family: var(--font-body);
  font-size: 12px;
  fill: var(--paper);
  paint-order: stroke;
  stroke: rgba(7, 23, 19, 0.85);
  stroke-width: 3px;
}

.page-about .about-net__node {
  transition: r 0.25s var(--ease), opacity 0.25s var(--ease);
  opacity: 0.9;
}

.page-about .about-net__node:hover {
  opacity: 1;
}

/* ---------- 收尾导航 ---------- */
.page-about .about-cta {
  padding-block: clamp(36px, 5vw, 72px);
}

.page-about .about-cta h2 {
  margin: 0 0 clamp(20px, 2.8vw, 32px);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.4vw, 40px);
  line-height: 1.06;
  letter-spacing: -0.01em;
}

.page-about .about-cta__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-cta__link {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px var(--about-pad);
  background: var(--pitch-700);
  text-decoration: none;
  color: var(--paper);
  transition: background 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .about-cta__link:hover,
.page-about .about-cta__link:focus-visible {
  background: #16463b;
  transform: translateY(-3px);
}

.page-about .about-cta__link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-about .about-cta__kicker {
  font-family: var(--font-num);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-about .about-cta__text {
  font-size: 14px;
  line-height: 1.7;
  color: var(--sand);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-coverage__head {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: end;
    gap: 32px;
  }

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

  .page-about .about-origin__cols {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px;
  }

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

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, 0.82fr);
  }

  .page-about .about-hero__stats {
    align-self: end;
  }

  .page-about .about-flow__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    align-items: start;
  }

  .page-about .about-team__panel {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
    align-items: start;
  }

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  }

  .page-about .about-rail__list {
    padding-left: 60px;
  }

  .page-about .about-rail__list::before {
    left: 21px;
  }

  .page-about .about-rail__marker {
    left: -60px;
    width: 44px;
    height: 44px;
    font-size: 15px;
  }

  .page-about .about-rail__item--narrow {
    padding-left: clamp(24px, 5vw, 96px);
  }

  .page-about .about-coverage__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-cta__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.01ms !important;
  }

  .page-about .about-step:hover,
  .page-about .about-rail__item:hover .about-rail__panel,
  .page-about .about-rail__item:focus-visible .about-rail__panel,
  .page-about .about-cta__link:hover,
  .page-about .about-cta__link:focus-visible {
    transform: none;
  }
}
<<<END>>>