.page-about {
  --about-line: var(--ray-line);
  background: var(--ray-ink);
  color: var(--ray-silver);
  overflow-x: clip;
}

.page-about .section {
  padding-block: clamp(52px, 8vw, 112px);
}

.page-about .section-head {
  max-width: 62ch;
}

.page-about .section-head .h2 {
  margin-top: 10px;
}

.page-about .eyebrow {
  color: var(--ray-mid);
}

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-top: calc(var(--header-h) + clamp(22px, 5vw, 56px));
  padding-bottom: clamp(40px, 7vw, 88px);
  background:
    radial-gradient(120% 100% at 92% -20%, rgba(31, 240, 196, 0.18), transparent 62%),
    radial-gradient(90% 80% at -10% 110%, rgba(255, 61, 138, 0.12), transparent 66%),
    var(--ray-ink);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  right: -14%;
  bottom: 6%;
  width: 66%;
  height: 44%;
  background: linear-gradient(115deg, rgba(31, 240, 196, 0.16), rgba(11, 168, 139, 0.02) 70%);
  border-top: 1px solid rgba(31, 240, 196, 0.4);
  transform: skewY(-8deg);
  pointer-events: none;
}

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

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(20px, 4vw, 40px);
}

.page-about .about-hero__layout {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
}

.page-about .about-hero .display-title {
  margin: 8px 0 clamp(16px, 3vw, 26px);
  color: var(--ray-paper);
}

.page-about .about-hero__lede {
  max-width: 38em;
  font-size: clamp(1rem, 1.6vw, 1.125rem);
  line-height: 1.8;
  color: var(--ray-silver);
}

.page-about .about-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 32px);
}

.page-about .about-hero__stats {
  list-style: none;
  margin: 0;
  padding: 0 0 0 18px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 18px;
  border-left: 2px solid var(--ray-cyan-deep);
}

.page-about .about-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-hero__num {
  font-size: clamp(1.7rem, 3.6vw, 2.5rem);
  font-weight: 700;
  line-height: 1;
  color: var(--ray-cyan);
}

.page-about .about-hero__unit {
  font-size: 0.55em;
  margin-left: 2px;
  color: var(--ray-cyan-deep);
}

.page-about .about-hero__cap {
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--ray-mid);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline__intro {
  margin-top: 14px;
  max-width: 40em;
  line-height: 1.8;
  color: var(--ray-mid);
}

.page-about .tl {
  list-style: none;
  margin: clamp(32px, 5vw, 56px) 0 0;
  padding: 0;
}

.page-about .tl-item {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  grid-template-areas:
    "spine year"
    "spine body";
  gap: 6px 14px;
  padding-bottom: clamp(30px, 5vw, 56px);
}

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

.page-about .tl-item__spine {
  grid-area: spine;
  position: relative;
}

.page-about .tl-item__spine::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 8px;
  bottom: -8px;
  width: 1px;
  background: linear-gradient(180deg, var(--ray-cyan-deep), var(--ray-line));
}

.page-about .tl-item:last-child .tl-item__spine::before {
  background: linear-gradient(180deg, var(--ray-cyan), rgba(31, 240, 196, 0));
}

.page-about .tl-item__spine::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 3px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ray-ink);
  border: 2px solid var(--ray-cyan);
  transform: translateX(-50%);
  transition: background 0.24s var(--ease), box-shadow 0.24s var(--ease);
}

.page-about .tl-item:hover .tl-item__spine::after,
.page-about .tl-item:focus-within .tl-item__spine::after {
  background: var(--ray-cyan);
  box-shadow: 0 0 0 6px rgba(31, 240, 196, 0.14);
}

.page-about .tl-item__year {
  grid-area: year;
  margin: 0;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--ray-cyan);
}

.page-about .tl-item__body {
  grid-area: body;
  min-width: 0;
}

.page-about .tl-item__kicker {
  margin: 0;
  font-size: 0.6875rem;
  letter-spacing: 0.22em;
  color: var(--ray-magenta);
}

.page-about .tl-item__body .h3 {
  margin: 8px 0 10px;
  color: var(--ray-paper);
}

.page-about .tl-item__text {
  max-width: 36em;
  line-height: 1.8;
  color: var(--ray-silver);
}

.page-about .tl-item__peek {
  margin-top: 12px;
  padding-left: 12px;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--ray-mid);
  border-left: 2px solid var(--ray-line);
  opacity: 0.75;
  transition: opacity 0.24s var(--ease), border-color 0.24s var(--ease), transform 0.24s var(--ease);
}

.page-about .tl-item:hover .tl-item__peek,
.page-about .tl-item:focus-within .tl-item__peek {
  opacity: 1;
  color: var(--ray-cyan);
  border-color: var(--ray-cyan);
  transform: translateX(3px);
}

.page-about .tl-item__figure {
  margin: clamp(16px, 3vw, 24px) 0 0;
}

/* ---------- 赛区 ---------- */
.page-about .about-zones {
  position: relative;
  background:
    radial-gradient(70% 60% at 100% 0%, rgba(255, 61, 138, 0.1), transparent 65%),
    var(--ray-ink);
}

.page-about .about-zones__intro {
  margin-top: 14px;
  max-width: 44em;
  line-height: 1.8;
  color: var(--ray-mid);
}

.page-about .about-zones__figure {
  margin: clamp(26px, 4vw, 44px) 0 clamp(24px, 4vw, 40px);
}

.page-about .zones {
  position: relative;
}

.page-about .zones__radio {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

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

.page-about .zones__tab {
  display: inline-block;
  padding: 9px 16px;
  font-size: 0.875rem;
  letter-spacing: 0.04em;
  color: var(--ray-mid);
  background: var(--ray-deep);
  border: 1px solid var(--ray-line);
  border-radius: 999px;
  cursor: pointer;
  transition: color 0.2s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .zones__tab:hover {
  color: var(--ray-paper);
  border-color: var(--ray-magenta);
  transform: translateY(-2px);
}

.page-about #zone-east:checked ~ .zones__tabs [for="zone-east"],
.page-about #zone-north:checked ~ .zones__tabs [for="zone-north"],
.page-about #zone-south:checked ~ .zones__tabs [for="zone-south"],
.page-about #zone-west:checked ~ .zones__tabs [for="zone-west"] {
  background: var(--ray-magenta);
  border-color: var(--ray-magenta);
  color: var(--ray-ink);
  font-weight: 700;
}

.page-about #zone-east:focus-visible ~ .zones__tabs [for="zone-east"],
.page-about #zone-north:focus-visible ~ .zones__tabs [for="zone-north"],
.page-about #zone-south:focus-visible ~ .zones__tabs [for="zone-south"],
.page-about #zone-west:focus-visible ~ .zones__tabs [for="zone-west"] {
  outline: 2px solid var(--ray-cyan);
  outline-offset: 3px;
}

.page-about .zones__panels {
  margin-top: clamp(18px, 3vw, 28px);
}

.page-about .zone-panel {
  display: none;
  padding: clamp(20px, 4vw, 40px);
  background: var(--ray-deep);
  border: 1px solid var(--ray-line);
  border-left: 3px solid var(--ray-magenta);
  border-radius: 4px 26px 4px 26px;
}

.page-about #zone-east:checked ~ .zones__panels .zone-panel--east,
.page-about #zone-north:checked ~ .zones__panels .zone-panel--north,
.page-about #zone-south:checked ~ .zones__panels .zone-panel--south,
.page-about #zone-west:checked ~ .zones__panels .zone-panel--west {
  display: block;
}

.page-about .zone-panel .h3 {
  margin: 0 0 16px;
  color: var(--ray-paper);
}

.page-about .zone-panel__list {
  margin: 0;
  display: grid;
  gap: 14px;
}

.page-about .zone-panel__list > div {
  display: grid;
  gap: 4px;
}

.page-about .zone-panel__list dt {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  color: var(--ray-cyan);
}

.page-about .zone-panel__list dd {
  margin: 0;
  max-width: 40em;
  line-height: 1.8;
  color: var(--ray-silver);
}

.page-about .zones__link {
  display: inline-block;
  margin-top: 20px;
  padding-bottom: 2px;
  font-size: 0.875rem;
  color: var(--ray-cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--ray-cyan-deep);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .zones__link:hover,
.page-about .zones__link:focus-visible {
  color: var(--ray-paper);
  border-color: var(--ray-cyan);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
}

.page-about .about-team__p {
  margin-top: 16px;
  max-width: 36em;
  line-height: 1.85;
  color: var(--ray-silver);
}

.page-about .about-team__stats {
  display: flex;
  gap: 16px;
  padding: clamp(18px, 3vw, 26px);
  background: linear-gradient(140deg, rgba(31, 240, 196, 0.08), rgba(14, 20, 24, 0.9));
  border: 1px solid var(--ray-line);
  border-radius: var(--radius);
  writing-mode: horizontal-tb;
}

.page-about .about-team__note {
  flex: 0 0 auto;
  align-self: center;
  color: var(--ray-cyan);
}

.page-about .about-team__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  flex: 1 1 auto;
}

.page-about .about-team__list li {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-team__num {
  font-size: clamp(1.8rem, 4.4vw, 2.8rem);
  font-weight: 700;
  line-height: 1;
  color: var(--ray-paper);
}

.page-about .about-team__label {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--ray-mid);
}

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

/* ---------- 赛事与青训 ---------- */
.page-about .program-list {
  list-style: none;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  border-top: 1px solid var(--ray-line);
}

.page-about .program-item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  grid-template-areas:
    "index title"
    "index text";
  gap: 6px 14px;
  padding: clamp(18px, 3vw, 28px) 0;
  border-bottom: 1px solid var(--ray-line);
  transition: background 0.24s var(--ease), padding-left 0.24s var(--ease);
}

.page-about .program-item:hover {
  background: linear-gradient(90deg, rgba(31, 240, 196, 0.07), transparent 70%);
  padding-left: 8px;
}

.page-about .program-item__index {
  grid-area: index;
  font-size: 0.8125rem;
  letter-spacing: 0.14em;
  color: var(--ray-magenta);
  padding-top: 4px;
}

.page-about .program-item .h3 {
  grid-area: title;
  margin: 0;
  color: var(--ray-paper);
}

.page-about .program-item__text {
  grid-area: text;
  max-width: 44em;
  line-height: 1.8;
  color: var(--ray-mid);
}

/* ---------- 运营标准 ---------- */
.page-about .about-standards {
  background: linear-gradient(180deg, var(--ray-ink), var(--ray-deep) 40%, var(--ray-ink));
}

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

.page-about .about-standards__p {
  margin: 16px 0 22px;
  max-width: 32em;
  line-height: 1.85;
  color: var(--ray-mid);
}

.page-about .spec-list {
  margin: 0;
  display: grid;
}

.page-about .spec-row {
  display: grid;
  gap: 6px;
  padding: 18px 0;
  border-top: 1px solid var(--ray-line);
}

.page-about .spec-row:last-child {
  border-bottom: 1px solid var(--ray-line);
}

.page-about .spec-row dt {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--ray-cyan);
}

.page-about .spec-row dd {
  margin: 0;
  max-width: 42em;
  line-height: 1.85;
  color: var(--ray-silver);
}

/* ---------- 归档 ---------- */
.page-about .about-archive__panel {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  padding: clamp(24px, 4vw, 48px);
}

.page-about .about-archive__p {
  margin: 16px 0 22px;
  max-width: 38em;
  line-height: 1.85;
  color: var(--ray-silver);
}

.page-about .about-archive__figure {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: flex-start;
  padding-top: 8px;
  border-top: 1px solid var(--ray-line);
}

.page-about .about-archive__num {
  font-size: clamp(2.7rem, 9vw, 4.6rem);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.02em;
  color: var(--ray-amber);
}

.page-about .about-archive__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--ray-mid);
}

.page-about .about-archive__facts .mono {
  color: var(--ray-cyan);
  font-weight: 700;
  margin-right: 4px;
}

/* ---------- 合作邀请 ---------- */
.page-about .about-cta__inner {
  position: relative;
  padding: clamp(26px, 5vw, 56px);
  background:
    linear-gradient(120deg, rgba(31, 240, 196, 0.14), rgba(255, 61, 138, 0.08) 60%, transparent),
    var(--ray-deep);
  border: 1px solid var(--ray-line);
  border-radius: 4px 40px 4px 40px;
  overflow: hidden;
}

.page-about .about-cta__note {
  position: absolute;
  top: clamp(20px, 4vw, 40px);
  right: clamp(12px, 3vw, 28px);
  color: var(--ray-magenta);
}

.page-about .about-cta__inner .h2 {
  max-width: 20em;
  color: var(--ray-paper);
}

.page-about .about-cta__p {
  margin: 16px 0 24px;
  max-width: 40em;
  line-height: 1.85;
  color: var(--ray-silver);
}

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

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero__layout {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.85fr);
    align-items: end;
  }

  .page-about .about-hero__stats {
    grid-template-columns: minmax(0, 1fr);
    gap: 22px;
    padding-left: 24px;
  }

  .page-about .tl-item {
    grid-template-columns: 92px 22px minmax(0, 1fr);
    grid-template-areas: "year spine body";
    gap: 0 26px;
  }

  .page-about .tl-item__year {
    justify-self: center;
    align-self: start;
    padding-top: 4px;
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    letter-spacing: 0.3em;
    font-size: 0.8125rem;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    grid-template-areas:
      "text figure"
      "stats figure";
    align-items: start;
    column-gap: clamp(32px, 5vw, 64px);
  }

  .page-about .about-team__text {
    grid-area: text;
  }

  .page-about .about-team__stats {
    grid-area: stats;
    margin-top: 8px;
  }

  .page-about .about-team__figure {
    grid-area: figure;
    align-self: stretch;
  }

  .page-about .program-item {
    grid-template-columns: 56px 260px minmax(0, 1fr);
    grid-template-areas: "index title text";
    align-items: baseline;
    gap: 0 24px;
  }

  .page-about .about-standards__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    column-gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }

  .page-about .about-standards__head {
    position: sticky;
    top: calc(var(--header-h) + 32px);
  }

  .page-about .spec-row {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
  }

  .page-about .about-archive__panel {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    align-items: start;
  }

  .page-about .about-archive__figure {
    border-top: 0;
    border-left: 1px solid var(--ray-line);
    padding-top: 0;
    padding-left: clamp(20px, 3vw, 36px);
    align-items: flex-end;
    text-align: right;
  }

  .page-about .about-archive__facts {
    justify-items: end;
  }

  .page-about .about-zones__figure {
    margin-top: 36px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-cta__inner {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.9fr);
    grid-template-areas:
      "title actions"
      "text actions";
    align-items: end;
    column-gap: clamp(32px, 5vw, 64px);
  }

  .page-about .about-cta__inner .h2 {
    grid-area: title;
  }

  .page-about .about-cta__p {
    grid-area: text;
    margin-bottom: 0;
  }

  .page-about .about-cta__actions {
    grid-area: actions;
    justify-content: flex-end;
    padding-bottom: 6px;
  }

  .page-about .about-cta__note {
    top: 24px;
    right: 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl-item__peek,
  .page-about .zones__tab,
  .page-about .program-item {
    transition: none;
  }
}