.page-about {
  --about-hair: rgba(11, 42, 74, .12);
  --about-hair-light: rgba(143, 243, 255, .22);
  --about-ink-soft: rgba(10, 22, 34, .72);
}

/* ============ 首屏 ============ */
.page-about .about-hero {
  position: relative;
  background:
    radial-gradient(130% 130% at 88% -18%, rgba(0, 229, 255, .20), transparent 58%),
    radial-gradient(85% 120% at 2% 112%, rgba(255, 107, 74, .16), transparent 62%),
    var(--deep-sea-800);
  color: var(--foam-050);
  padding: clamp(26px, 3.6vw, 48px) 0 clamp(44px, 5.6vw, 84px);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--aurora-400), var(--coral-500) 46%, rgba(0, 229, 255, 0) 92%);
}

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

.page-about .about-hero .breadcrumbs__link,
.page-about .about-hero .breadcrumbs__current,
.page-about .about-hero .breadcrumbs__sep {
  color: rgba(244, 248, 251, .68);
}

.page-about .about-hero .breadcrumbs__link:hover {
  color: var(--aurora-400);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-3);
  margin-top: clamp(26px, 4vw, 54px);
}

.page-about .about-hero__eyebrow {
  color: var(--aurora-150);
  margin-bottom: var(--sp-1);
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(40px, 8.4vw, 88px);
  line-height: 1.04;
  letter-spacing: .02em;
  margin: 0;
  color: #fff;
  text-wrap: balance;
}

.page-about .about-hero__lede {
  color: rgba(244, 248, 251, .86);
  margin: 0 0 var(--sp-2);
}

.page-about .about-hero__ticks {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  font-size: 15px;
  color: rgba(244, 248, 251, .74);
}

.page-about .about-hero__ticks li {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-about .tick-dot {
  flex: none;
  width: 7px;
  height: 7px;
  margin-top: 6px;
  background: var(--coral-500);
  transform: rotate(45deg);
}

/* ============ 章节序号 ============ */
.page-about .chapter-mark {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(48px, 8vw, 84px);
  line-height: .82;
  letter-spacing: .02em;
  color: transparent;
  -webkit-text-stroke: 1.4px var(--aurora-400);
  text-stroke: 1.4px var(--aurora-400);
}

/* ============ 中心简介 ============ */
.page-about .about-intro {
  background: var(--foam-050);
}

.page-about .about-intro__head {
  display: grid;
  gap: var(--sp-2);
  margin-bottom: var(--sp-3);
}

.page-about .about-intro__head .section-title,
.page-about .about-team__head .section-title {
  margin-top: 6px;
}

.page-about .about-intro__head .lede {
  margin-top: var(--sp-2);
  color: var(--about-ink-soft);
}

.page-about .about-intro__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-3);
}

.page-about .about-intro__text p {
  margin: 0 0 var(--sp-2);
  color: var(--about-ink-soft);
  max-width: var(--text-w);
}

.page-about .about-intro__text p:last-child {
  margin-bottom: 0;
}

.page-about .fact-cap {
  margin: 0 0 var(--sp-2);
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 14px;
  letter-spacing: .12em;
  color: var(--current-600);
}

.page-about .fact-list {
  margin: 0;
  display: grid;
  gap: 12px;
}

.page-about .fact-row {
  display: flex;
  justify-content: space-between;
  gap: var(--sp-1);
  padding-bottom: 11px;
  border-bottom: 1px solid var(--about-hair);
}

.page-about .fact-row:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .fact-row dt {
  font-size: 15px;
  color: var(--slate-500);
}

.page-about .fact-row dd {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 16px;
  color: var(--ink-900);
  text-align: right;
}

.page-about .fact-row .data-num {
  font-family: var(--font-data);
  font-weight: 500;
  color: var(--coral-500);
  margin-right: 2px;
}

.page-about .about-intro__figure {
  margin: var(--sp-4) 0 0;
}

/* ============ 发展历程 ============ */
.page-about .about-timeline {
  background: var(--foam-050);
  border-top: 1px solid var(--about-hair);
}

.page-about .about-timeline__head {
  margin-bottom: var(--sp-3);
}

.page-about .about-timeline__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-3);
}

.page-about .year-rail__label {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--slate-500);
}

.page-about .year-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 20px;
  border-left: 2px solid rgba(27, 122, 150, .28);
  display: grid;
  gap: 18px;
}

.page-about .year-rail__item {
  position: relative;
}

.page-about .year-rail__link {
  position: relative;
  display: inline-block;
  font-family: var(--font-data);
  font-weight: 500;
  font-size: 17px;
  letter-spacing: .04em;
  color: var(--slate-500);
  text-decoration: none;
  transition: color .25s var(--ease);
}

.page-about .year-rail__link::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--foam-050);
  border: 2px solid var(--aurora-400);
  transition: background .25s var(--ease), transform .25s var(--ease);
}

.page-about .year-rail__link:hover,
.page-about .year-rail__link:focus-visible {
  color: var(--deep-sea-800);
}

.page-about .year-rail__link:hover::before,
.page-about .year-rail__link:focus-visible::before {
  background: var(--coral-500);
  border-color: var(--coral-500);
  transform: scale(1.25);
}

.page-about .year-stream {
  display: grid;
  gap: var(--sp-2);
}

.page-about .year-entry {
  position: relative;
  padding: var(--sp-2) var(--sp-2) var(--sp-2) calc(var(--sp-2) + 8px);
  background: #fff;
  border-left: 3px solid var(--aurora-400);
  box-shadow: 0 20px 44px -34px rgba(6, 26, 46, .55);
}

.page-about .year-entry:nth-child(even) {
  border-left-color: var(--coral-500);
}

.page-about .year-entry__year {
  margin: 0 0 6px;
  font-family: var(--font-data);
  font-weight: 500;
  font-size: 15px;
  letter-spacing: .12em;
  color: var(--current-600);
}

.page-about .year-entry__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(19px, 2vw, 23px);
  letter-spacing: .01em;
  color: var(--ink-900);
}

.page-about .year-entry__body {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--about-ink-soft);
  max-width: 42em;
}

/* ============ 教练履历 ============ */
.page-about .about-coaches {
  background: var(--mist-100);
}

.page-about .about-coaches__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-3);
}

.page-about .about-coaches .lede {
  color: var(--about-ink-soft);
  margin-bottom: var(--sp-2);
}

.page-about .about-coaches__tabs {
  margin-bottom: var(--sp-2);
}

.page-about .coach-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--sp-2);
}

.page-about .coach-card {
  position: relative;
  padding: var(--sp-2);
  background: #fff;
  border-top: 1px solid rgba(0, 229, 255, .5);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease);
}

.page-about .coach-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 26px 48px -36px rgba(6, 26, 46, .7);
}

.page-about .coach-card__meta {
  margin: 0 0 8px;
  font-family: var(--font-data);
  font-weight: 500;
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--current-600);
}

.page-about .coach-card__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 18px;
  color: var(--ink-900);
}

.page-about .coach-card__body {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--about-ink-soft);
}

.page-about .coach-years {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .coach-years__row {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: var(--sp-1);
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px solid var(--about-hair);
}

.page-about .coach-years__year {
  font-family: var(--font-data);
  font-weight: 500;
  font-size: 15px;
  letter-spacing: .04em;
  color: var(--coral-500);
}

.page-about .coach-years__desc {
  font-size: 15px;
  line-height: 1.7;
  color: var(--about-ink-soft);
}

.page-about .about-coaches__visual {
  margin: 0;
  align-self: start;
}

/* ============ 赛区协作 ============ */
.page-about .about-network {
  position: relative;
  overflow: hidden;
}

.page-about .about-network::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(70% 80% at 84% 12%, rgba(0, 229, 255, .14), transparent 62%),
    radial-gradient(60% 80% at 8% 92%, rgba(255, 107, 74, .12), transparent 66%);
  pointer-events: none;
}

.page-about .about-network__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-3);
}

.page-about .about-network__eyebrow {
  color: var(--aurora-150);
}

.page-about .about-network__title {
  color: var(--foam-050);
}

.page-about .about-network__lede {
  color: rgba(244, 248, 251, .82);
  margin-bottom: var(--sp-3);
}

.page-about .network-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--sp-2);
}

.page-about .network-stat {
  padding-top: 14px;
  border-top: 2px solid var(--aurora-400);
}

.page-about .network-stat__num {
  display: block;
  font-family: var(--font-data);
  font-weight: 500;
  font-size: clamp(30px, 4.2vw, 42px);
  line-height: 1;
  color: var(--aurora-400);
}

.page-about .network-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 14px;
  letter-spacing: .04em;
  color: rgba(244, 248, 251, .72);
}

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

.page-about .about-network__visual img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.92) contrast(1.06);
}

.page-about .about-network__caption {
  margin-top: 10px;
  font-size: 13px;
  letter-spacing: .04em;
  color: rgba(244, 248, 251, .56);
}

.page-about .network-note {
  position: relative;
  margin-top: var(--sp-4);
  padding-top: var(--sp-3);
  border-top: 1px solid var(--about-hair-light);
}

.page-about .network-note__title {
  margin: 0 0 var(--sp-2);
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(20px, 2.4vw, 26px);
  color: var(--foam-050);
}

.page-about .network-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--sp-2);
}

.page-about .network-flow__item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(244, 248, 251, .78);
}

.page-about .network-flow__idx {
  flex: none;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--deep-sea-800);
  background: var(--aurora-400);
}

/* ============ 内容团队 ============ */
.page-about .about-team {
  background: var(--foam-050);
}

.page-about .about-team__head {
  display: grid;
  gap: var(--sp-2);
  margin-bottom: var(--sp-3);
}

.page-about .about-team__head .lede {
  margin-top: var(--sp-2);
  color: var(--about-ink-soft);
}

.page-about .team-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-2);
  margin-bottom: var(--sp-4);
}

.page-about .team-split__item {
  padding: var(--sp-2);
  background: #fff;
  border-bottom: 3px solid var(--mist-100);
  transition: border-color .25s var(--ease);
}

.page-about .team-split__item:hover {
  border-bottom-color: var(--aurora-400);
}

.page-about .team-split__num {
  display: block;
  font-family: var(--font-data);
  font-weight: 500;
  font-size: clamp(38px, 5.4vw, 54px);
  line-height: 1;
  color: var(--deep-sea-800);
}

.page-about .team-split__role {
  margin: 12px 0 8px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: .02em;
  color: var(--coral-500);
}

.page-about .team-split__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--about-ink-soft);
}

.page-about .team-flow__title {
  margin: 0 0 var(--sp-2);
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 20px;
  color: var(--ink-900);
}

.page-about .team-flow__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .team-flow__step {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: var(--sp-2);
  align-items: baseline;
  padding: 16px 0;
  border-bottom: 1px solid var(--about-hair);
}

.page-about .team-flow__step-no {
  font-family: var(--font-data);
  font-weight: 500;
  font-size: 15px;
  color: var(--aurora-400);
}

.page-about .team-flow__step-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--about-ink-soft);
}

/* ============ 认可与伙伴 ============ */
.page-about .about-recognition {
  background: var(--mist-100);
}

.page-about .about-recognition__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-3);
}

.page-about .about-recognition__main .lede {
  color: var(--about-ink-soft);
  margin-bottom: var(--sp-2);
}

.page-about .about-recognition__main p {
  color: var(--about-ink-soft);
  max-width: var(--text-w);
}

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

.page-about .badge-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: #fff;
  border-left: 3px solid var(--coral-500);
  font-size: 15px;
  color: var(--ink-900);
}

.page-about .badge-item__mark {
  color: var(--coral-500);
  font-size: 12px;
}

.page-about .partner-line {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-2);
  margin-top: var(--sp-4);
  padding-top: var(--sp-3);
  border-top: 1px solid var(--about-hair);
}

.page-about .partner-line__cell {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-about .partner-line__num {
  font-family: var(--font-data);
  font-weight: 500;
  font-size: clamp(28px, 3.6vw, 38px);
  line-height: 1;
  color: var(--deep-sea-800);
}

.page-about .partner-line__label {
  font-size: 15px;
  color: var(--slate-500);
}

/* ============ 合作方式 ============ */
.page-about .about-partner {
  position: relative;
  overflow: hidden;
}

.page-about .about-partner::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 3px;
  background: linear-gradient(90deg, rgba(0, 229, 255, 0) 8%, var(--aurora-400) 50%, var(--coral-500));
}

.page-about .about-partner__head {
  margin-bottom: var(--sp-3);
}

.page-about .about-partner__eyebrow {
  color: var(--coral-200);
}

.page-about .about-partner__title {
  color: var(--foam-050);
}

.page-about .about-partner__lede {
  color: rgba(244, 248, 251, .82);
  margin-top: var(--sp-2);
}

.page-about .partner-ways {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-2);
}

.page-about .way-card {
  position: relative;
  padding: var(--sp-2);
  background: linear-gradient(150deg, rgba(20, 61, 99, .92), rgba(6, 26, 46, .92));
  border: 1px solid rgba(143, 243, 255, .18);
  transition: border-color .25s var(--ease), transform .25s var(--ease);
}

.page-about .way-card:hover {
  border-color: var(--aurora-400);
  transform: translateY(-4px);
}

.page-about .way-card__no {
  display: block;
  font-family: var(--font-data);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: .14em;
  color: var(--aurora-400);
  margin-bottom: 14px;
}

.page-about .way-card__title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: .01em;
  color: #fff;
}

.page-about .way-card__body {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(244, 248, 251, .78);
}

.page-about .about-partner__cta {
  margin-top: var(--sp-3);
  padding-top: var(--sp-3);
  border-top: 1px solid var(--about-hair-light);
  display: grid;
  gap: var(--sp-2);
}

.page-about .about-partner__cta-text {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(244, 248, 251, .8);
  max-width: var(--text-w);
}

.page-about .about-partner__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-1);
}

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

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

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

  .page-about .about-partner__cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    align-items: end;
    gap: var(--sp-4);
  }

  .page-about .about-intro__head {
    grid-template-columns: 140px minmax(0, 1fr);
    align-items: start;
    gap: var(--sp-3);
  }

  .page-about .about-intro__body {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-timeline__grid {
    grid-template-columns: 180px minmax(0, 1fr);
    gap: var(--sp-4);
  }

  .page-about .year-rail {
    position: sticky;
    top: calc(var(--sp-3) + 84px);
    align-self: start;
  }

  .page-about .about-coaches__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: start;
    gap: var(--sp-4);
  }

  .page-about .about-network__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    align-items: center;
    gap: var(--sp-4);
  }

  .page-about .network-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--sp-2) var(--sp-3);
  }

  .page-about .about-team__head {
    grid-template-columns: 140px minmax(0, 1fr);
    align-items: start;
    gap: var(--sp-3);
  }

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

  .page-about .about-recognition__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: start;
    gap: var(--sp-4);
  }

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

@media (min-width: 1100px) {
  .page-about .about-hero__lede {
    font-size: 18px;
  }

  .page-about .year-entry {
    padding: var(--sp-3) var(--sp-3) var(--sp-3) calc(var(--sp-3) + 8px);
  }
}
<<<END>>>