.page-about {
  --about-lead: clamp(48px, 7vw, 88px);
  --about-gap: clamp(18px, 2.4vw, 28px);
  background: var(--ink);
  color: var(--on-dark);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + var(--track-h) + 40px) 0 clamp(46px, 6vw, 78px);
  background:
    linear-gradient(160deg, var(--ink) 0%, var(--ink-2) 62%, var(--ink-3) 100%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: auto auto -34% 34%;
  width: 74%;
  height: 78%;
  background: radial-gradient(closest-side, rgba(182, 255, 60, .16), transparent 72%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0 0 0 auto;
  width: 22%;
  background: linear-gradient(180deg, rgba(182, 255, 60, .1), transparent 65%);
  clip-path: polygon(38% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 5vw, 56px);
  align-items: start;
}

.page-about .about-hero__copy .breadcrumbs {
  margin-bottom: 18px;
}

.page-about .about-hero__copy .eyebrow {
  color: var(--neon);
}

.page-about .about-hero h1 {
  margin: 10px 0 0;
  font-size: clamp(32px, 6.4vw, 58px);
  line-height: 1.1;
  letter-spacing: -.02em;
  font-weight: 900;
  transform: skewX(-2deg);
}

.page-about .about-hero .lead {
  margin: 18px 0 0;
  max-width: 60ch;
  font-size: 17px;
  line-height: 1.75;
  color: var(--on-dark-dim);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-hero__facts li {
  background: var(--ink-2);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-about .about-hero__num {
  font-size: 30px;
  line-height: 1;
  font-weight: 900;
  color: var(--neon);
}

.page-about .about-hero__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--on-dark-dim);
}

.page-about .about-hero__actions {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 记分牌视觉 ---------- */
.page-about .board {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(20, 26, 21, .96), rgba(11, 15, 12, .96));
  box-shadow: var(--shadow-1);
  padding: clamp(20px, 3vw, 30px);
}

.page-about .board__frame {
  position: relative;
  padding-top: 6px;
}

.page-about .board__ticks {
  display: flex;
  justify-content: space-between;
  gap: 4px;
  margin-bottom: 14px;
}

.page-about .board__ticks span {
  flex: 1;
  height: 8px;
  background: var(--line);
  border-radius: 1px;
}

.page-about .board__ticks span:nth-child(-n+6) {
  background: var(--neon-deep);
}

.page-about .board__ring {
  position: relative;
  width: min(240px, 62vw);
  aspect-ratio: 1;
  margin: 0 auto;
  border-radius: 50%;
  background: conic-gradient(from -90deg, var(--neon) 0 62%, rgba(182, 255, 60, .14) 62% 100%);
  display: grid;
  place-items: center;
}

.page-about .board__ring::before {
  content: "";
  position: absolute;
  inset: 14px;
  border-radius: 50%;
  background: var(--ink);
  border: 1px solid var(--line);
}

.page-about .board__ring::after {
  content: "";
  position: absolute;
  inset: 26px;
  border-radius: 50%;
  border: 1px dashed rgba(182, 255, 60, .22);
}

.page-about .board__center {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: baseline;
  gap: 6px;
  color: var(--on-dark);
}

.page-about .board__value {
  font-size: clamp(52px, 12vw, 76px);
  line-height: 1;
  font-weight: 900;
  color: var(--neon);
  letter-spacing: -.02em;
}

.page-about .board__unit {
  font-size: 18px;
  font-weight: 700;
  color: var(--amber);
}

.page-about .board__caption {
  margin: 18px 0 0;
  text-align: center;
  font-size: 13px;
  color: var(--on-dark-dim);
}

.page-about .board__legend {
  list-style: none;
  margin: 22px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 10px;
  font-size: 13px;
  color: var(--on-dark-dim);
}

.page-about .board__legend li {
  display: flex;
  align-items: center;
  gap: 9px;
}

.page-about .dot {
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  border-radius: 50%;
}

.page-about .dot--neon { background: var(--neon); }
.page-about .dot--amber { background: var(--amber); }
.page-about .dot--paper { background: var(--on-dark); }
.page-about .dot--red { background: var(--red); }

/* ---------- 由来与时间线 ---------- */
.page-about .about-origin {
  background: var(--ink);
}

.page-about .origin__body {
  display: grid;
  gap: 16px;
  max-width: 78ch;
  margin-bottom: clamp(30px, 4vw, 46px);
}

.page-about .origin__body .prose {
  color: var(--on-dark-dim);
}

.page-about .tl {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .tl__item {
  position: relative;
  padding-left: 22px;
  border-left: 1px solid var(--line);
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 20px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--neon-deep);
}

.page-about .tl__node {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-2);
  transition: border-color var(--t), transform var(--t);
}

.page-about .tl__node[open] {
  border-color: var(--line-soft);
  background: var(--ink-3);
}

.page-about .tl__node > summary {
  list-style: none;
  cursor: pointer;
  padding: 16px 18px;
  display: grid;
  gap: 4px;
}

.page-about .tl__node > summary::-webkit-details-marker {
  display: none;
}

.page-about .tl__node > summary:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}

.page-about .tl__dot {
  display: none;
}

.page-about .tl__phase {
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--amber);
  font-weight: 700;
}

.page-about .tl__title {
  font-size: 17px;
  font-weight: 800;
  color: var(--on-dark);
  line-height: 1.4;
}

.page-about .tl__body {
  margin: 0;
  padding: 0 18px 18px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--on-dark-dim);
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: var(--ink-2);
}

.page-about .section__lead {
  margin: 12px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--on-dark-dim);
}

.page-about .team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3vw, 36px);
  margin-top: clamp(28px, 4vw, 44px);
}

.page-about .team__roles {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .role {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink);
  padding: 18px 20px;
  transition: transform var(--t), border-color var(--t), background var(--t);
}

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

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

.page-about .role__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.page-about .role__name {
  margin: 0;
  font-size: 18px;
  font-weight: 800;
  color: var(--on-dark);
}

.page-about .role__count {
  font-size: 24px;
  font-weight: 900;
  color: var(--amber);
  line-height: 1;
}

.page-about .role__duty {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--on-dark-dim);
}

.page-about .role__shift {
  margin: 12px 0 0;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
  color: var(--neon);
}

@media (hover: hover) {
  .page-about .role__shift {
    max-height: 0;
    margin-top: 0;
    padding-top: 0;
    border-top-color: transparent;
    opacity: 0;
    overflow: hidden;
    transition: opacity var(--t), max-height var(--t), margin var(--t);
  }

  .page-about .role:hover .role__shift,
  .page-about .role:focus-within .role__shift,
  .page-about .role:focus-visible .role__shift {
    max-height: 80px;
    margin-top: 12px;
    padding-top: 10px;
    border-top-color: var(--line);
    opacity: 1;
  }
}

.page-about .team__media {
  margin: 0;
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink);
}

.page-about .team__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.85) contrast(1.05);
}

.page-about .team__media figcaption {
  padding: 14px 18px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--on-dark-dim);
  border-top: 1px solid var(--line);
}

/* ---------- 流程轨道 ---------- */
.page-about .about-flow {
  position: relative;
  background: linear-gradient(180deg, var(--ink-2) 0%, var(--ink) 100%);
  padding-bottom: clamp(58px, 7vw, 96px);
}

.page-about .flow {
  list-style: none;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .flow__step {
  background: var(--ink-2);
  padding: 22px 20px 24px;
  display: grid;
  gap: 10px;
  align-content: start;
  position: relative;
  transition: background var(--t);
}

.page-about .flow__step:hover {
  background: var(--ink-3);
}

.page-about .flow__index {
  display: inline-block;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: .1em;
  color: var(--ink);
  background: var(--neon);
  border-radius: 2px;
  padding: 3px 8px;
  width: max-content;
}

.page-about .flow__title {
  margin: 0;
  font-size: 20px;
  font-weight: 800;
  color: var(--on-dark);
}

.page-about .flow__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--on-dark-dim);
}

/* ---------- 资料覆盖（暖纸区） ---------- */
.page-about .section--paper.about-archive {
  background: var(--paper);
  color: var(--ink);
}

.page-about .about-archive .eyebrow {
  color: var(--neon-deep);
}

.page-about .about-archive h2 {
  color: var(--ink);
}

.page-about .about-archive .prose {
  color: var(--muted);
}

.page-about .archive__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 3.4vw, 44px);
  align-items: start;
}

.page-about .archive__figure {
  margin: 24px 0 0;
  border: 1px solid rgba(36, 48, 42, .18);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--card);
}

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

.page-about .archive__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .archive__item {
  background: var(--card);
  border: 1px solid rgba(36, 48, 42, .16);
  border-left: 3px solid var(--neon-deep);
  border-radius: var(--radius);
  padding: 16px 18px;
  transition: transform var(--t), border-color var(--t);
}

.page-about .archive__item:hover {
  transform: translateY(-2px);
  border-left-color: var(--amber);
}

.page-about .archive__item h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 800;
  color: var(--ink);
}

.page-about .archive__item p {
  margin: 0 0 10px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 场馆 ---------- */
.page-about .about-venues {
  background:
    linear-gradient(200deg, var(--ink-3) 0%, var(--ink) 55%);
}

.page-about .venues__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 3.4vw, 46px);
  align-items: start;
}

.page-about .about-venues .prose {
  color: var(--on-dark-dim);
}

.page-about .venues__fields {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .venues__fields li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--on-dark-dim);
}

.page-about .turf {
  margin-top: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
  background: rgba(20, 26, 21, .7);
}

.page-about .turf__title {
  margin: 0 0 14px;
  font-size: 13px;
  letter-spacing: .12em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--amber);
}

.page-about .turf__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .turf__item {
  display: grid;
  grid-template-columns: 26px 1fr;
  grid-template-rows: auto auto;
  column-gap: 12px;
  align-items: center;
}

.page-about .turf__icon {
  grid-row: 1 / span 2;
  width: 26px;
  height: 26px;
  border: 1px solid var(--neon);
  transform: rotate(45deg) skewY(-8deg);
  border-radius: 2px;
}

.page-about .turf__icon--natural {
  background: repeating-linear-gradient(90deg, rgba(182, 255, 60, .5) 0 2px, transparent 2px 5px);
}

.page-about .turf__icon--hybrid {
  background: repeating-linear-gradient(90deg, rgba(143, 212, 0, .5) 0 2px, transparent 2px 5px),
              repeating-linear-gradient(0deg, rgba(255, 185, 46, .35) 0 2px, transparent 2px 6px);
}

.page-about .turf__icon--artificial {
  background: repeating-linear-gradient(90deg, rgba(90, 99, 91, .8) 0 2px, transparent 2px 4px);
  border-color: var(--on-dark-dim);
}

.page-about .turf__name {
  font-size: 15px;
  font-weight: 700;
  color: var(--on-dark);
}

.page-about .turf__desc {
  font-size: 13px;
  line-height: 1.6;
  color: var(--on-dark-dim);
}

.page-about .venues__media {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-2);
}

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

.page-about .venues__media figcaption {
  padding: 14px 18px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--on-dark-dim);
  border-top: 1px solid var(--line);
}

/* ---------- 合作与纠错 ---------- */
.page-about .section--paper.about-partners {
  background: var(--paper);
  color: var(--ink);
}

.page-about .about-partners .eyebrow {
  color: var(--neon-deep);
}

.page-about .about-partners h2 {
  color: var(--ink);
}

.page-about .about-partners .prose {
  color: var(--muted);
}

.page-about .partners__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.2vw, 40px);
  align-items: start;
}

.page-about .partners__stats {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 14px;
}

.page-about .partners__stats li {
  background: var(--card);
  border: 1px solid rgba(36, 48, 42, .16);
  border-top: 3px solid var(--amber);
  border-radius: var(--radius);
  padding: 16px;
  display: grid;
  gap: 4px;
}

.page-about .partners__num {
  font-size: 34px;
  line-height: 1;
  font-weight: 900;
  color: var(--ink);
}

.page-about .partners__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--muted);
}

.page-about .partners__callout {
  background: var(--ink);
  color: var(--on-dark);
  border-radius: var(--radius);
  padding: clamp(22px, 3vw, 32px);
  border: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}

.page-about .partners__callout::after {
  content: "";
  position: absolute;
  top: -40px;
  right: -50px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(closest-side, rgba(255, 185, 46, .22), transparent 72%);
  pointer-events: none;
}

.page-about .partners__callout h3 {
  margin: 0 0 12px;
  font-size: 22px;
  font-weight: 800;
  color: var(--neon);
  position: relative;
  z-index: 1;
}

.page-about .partners__callout p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--on-dark-dim);
  position: relative;
  z-index: 1;
}

.page-about .partners__actions {
  margin: 22px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  position: relative;
  z-index: 1;
}

.page-about .partners__note {
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--on-dark-dim);
  position: relative;
  z-index: 1;
}

.page-about .partners__note a {
  color: var(--neon);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .partners__note a:hover {
  color: var(--amber);
}

/* ---------- 焦点态 ---------- */
.page-about a:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}

/* ---------- 桌面布局 ---------- */
@media (min-width: 760px) {
  .page-about .flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

  .page-about .tl {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 1000px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: clamp(38px, 4.4vw, 68px);
    align-items: center;
  }

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

  .page-about .tl {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .tl__item {
    padding-left: 0;
    padding-top: 22px;
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .page-about .tl__item::before {
    left: 0;
    top: -4px;
  }

  .page-about .team__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: start;
  }

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

  .page-about .venues__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: center;
  }

  .page-about .partners__grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .role,
  .page-about .archive__item,
  .page-about .tl__node,
  .page-about .flow__step {
    transition: none;
  }
}
</final>