.page-about {
  --about-index-w: 236px;
  --about-measure: 74ch;
  --about-gap: clamp(28px, 4vw, 56px);
  background: var(--c-paper);
  color: var(--c-text);
}

/* ---------- 刊头式首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(38px, 5.5vw, 78px) 0 clamp(32px, 4.5vw, 60px);
  background:
    radial-gradient(760px 320px at 14% -18%, rgba(232, 178, 58, 0.18), transparent 72%),
    radial-gradient(620px 300px at 92% -6%, rgba(240, 122, 42, 0.13), transparent 70%),
    linear-gradient(178deg, var(--c-ink) 0%, var(--c-night) 96%);
  color: var(--c-paper);
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--c-gold) 22%, var(--c-gold) 62%, transparent);
  opacity: 0.7;
}
.page-about .about-hero__inner {
  max-width: 900px;
}
.page-about .about-hero__eyebrow {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--c-gold);
}
.page-about .about-hero__title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(30px, 5.2vw, 52px);
  line-height: 1.22;
  letter-spacing: 0.01em;
}
.page-about .about-hero__lead {
  margin: 0;
  max-width: 66ch;
  font-size: clamp(16px, 1.9vw, 18px);
  line-height: 1.85;
  color: rgba(244, 241, 232, 0.84);
}
.page-about .about-hero__stats {
  list-style: none;
  margin: clamp(26px, 4vw, 46px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--c-line-dark-soft);
  border-top: 1px solid var(--c-line-dark-soft);
  border-bottom: 1px solid var(--c-line-dark-soft);
}
.page-about .about-hero__stats > li {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 16px;
  background: rgba(12, 26, 46, 0.55);
}
.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(26px, 3.6vw, 38px);
  line-height: 1;
  color: var(--c-gold);
  letter-spacing: -0.01em;
}
.page-about .about-stat__label {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: rgba(244, 241, 232, 0.7);
}

/* ---------- 杂志式分栏 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  padding-top: clamp(34px, 5vw, 68px);
  padding-bottom: clamp(46px, 7vw, 96px);
}

/* 左侧粘性章节索引 */
.page-about .about-index {
  border-left: 2px solid var(--c-line);
  padding-left: 0;
}
.page-about .about-index__title {
  margin: 0 0 14px 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--c-muted);
}
.page-about .about-index ol {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .about-index li {
  position: relative;
}
.page-about .about-index a {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
  padding: 8px 0 8px 16px;
  font-size: 14px;
  line-height: 1.45;
  color: var(--c-muted);
  text-decoration: none;
  transition: color 160ms var(--ease);
}
.page-about .about-index a::before {
  content: "";
  position: absolute;
  left: -2px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--c-gold);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform 200ms var(--ease);
}
.page-about .about-index a:hover,
.page-about .about-index a:focus-visible {
  color: var(--c-text);
}
.page-about .about-index a[aria-current="location"] {
  color: var(--c-text);
}
.page-about .about-index a[aria-current="location"]::before {
  transform: scaleY(1);
}
.page-about .about-index__no {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-clay);
}
.page-about .about-index a[aria-current="location"] .about-index__no {
  color: var(--c-orange-deep);
}

/* ---------- 正文 ---------- */
.page-about .about-article {
  max-width: var(--about-measure);
}
.page-about .about-section {
  padding: clamp(28px, 3.6vw, 46px) 0 clamp(20px, 2.6vw, 32px);
  border-top: 1px solid var(--c-line);
}
.page-about .about-section:first-child {
  padding-top: 0;
  border-top: 2px solid var(--c-gold);
}
.page-about .about-section__head {
  margin-bottom: clamp(16px, 2vw, 24px);
}
.page-about .about-section__kicker {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--c-clay);
}
.page-about .about-section h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 3.4vw, 33px);
  line-height: 1.3;
  color: var(--c-ink);
}
.page-about .about-article p {
  margin: 0 0 1.05em;
  font-size: clamp(16px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--c-text);
}
.page-about .about-article p:last-child {
  margin-bottom: 0;
}
.page-about .about-article a {
  color: var(--c-orange-deep);
  text-decoration: none;
  border-bottom: 1px solid rgba(168, 70, 26, 0.35);
  transition: border-color 160ms var(--ease), color 160ms var(--ease);
}
.page-about .about-article a:hover,
.page-about .about-article a:focus-visible {
  color: var(--c-brick);
  border-bottom-color: var(--c-brick);
}

/* 放大引用 */
.page-about .about-pull {
  margin: clamp(24px, 3.2vw, 38px) 0;
  padding: 22px 26px;
  background: linear-gradient(160deg, rgba(247, 227, 176, 0.62), rgba(247, 227, 176, 0.2));
  border-left: 3px solid var(--c-gold);
  font-family: var(--font-display);
  font-size: clamp(19px, 2.4vw, 24px);
  line-height: 1.62;
  color: var(--c-ink);
}

/* 图片容器 */
.page-about .about-figure {
  margin: clamp(24px, 3.4vw, 40px) 0;
}
.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: var(--c-night);
  border: 1px solid var(--c-line);
}
.page-about .about-figure--band img {
  aspect-ratio: 20 / 7;
}
.page-about .about-figure--tall img {
  aspect-ratio: 10 / 7;
}
.page-about .about-figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: var(--c-muted);
}

/* ---------- 四级联赛矩阵 ---------- */
.page-about .about-matrix {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: clamp(20px, 2.8vw, 30px) 0;
  background: var(--c-line);
  border: 1px solid var(--c-line);
}
.page-about .about-matrix__col {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 18px 16px 20px;
  background: var(--c-white);
  transition: transform 140ms var(--ease), box-shadow 140ms var(--ease);
}
.page-about .about-matrix__col:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-1);
}
.page-about .about-matrix__col .league-band {
  display: block;
  width: 100%;
}
.page-about .about-matrix__name {
  margin: 0;
  font-family: var(--font-ui);
  font-weight: 800;
  font-size: 16px;
  letter-spacing: 0.02em;
  color: var(--c-ink);
}
.page-about .about-matrix__count {
  margin: 0;
  font-size: 14px;
  color: var(--c-muted);
}
.page-about .about-matrix__count .num {
  font-family: var(--font-mono);
  font-size: 22px;
  color: var(--c-orange-deep);
}
.page-about .about-matrix__focus {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-muted);
}

/* ---------- 比赛日流程（深色面板） ---------- */
.page-about .about-flow-panel {
  margin: clamp(22px, 3vw, 34px) 0;
  padding: clamp(20px, 3vw, 32px);
  background: linear-gradient(158deg, var(--c-ink) 0%, var(--c-night) 100%);
  border: 1px solid var(--c-line-dark);
  color: var(--c-paper);
}
.page-about .about-flow-panel__lead {
  margin: 0 0 22px;
  font-family: var(--font-display);
  font-size: clamp(17px, 2.1vw, 21px);
  line-height: 1.6;
  color: var(--c-gold-soft);
}
.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}
.page-about .about-flow__step {
  position: relative;
  padding-top: 14px;
  border-top: 1px solid var(--c-line-dark);
}
.page-about .about-flow__step::before {
  content: "";
  position: absolute;
  top: -4px;
  left: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-gold);
}
.page-about .about-flow__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--c-orange);
}
.page-about .about-flow__title {
  margin: 6px 0 6px;
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: 15px;
  color: var(--c-paper);
}
.page-about .about-flow__desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(244, 241, 232, 0.72);
}

/* ---------- 版本时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: clamp(20px, 2.8vw, 30px) 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}
.page-about .about-step {
  background: var(--c-white);
  border: 1px solid var(--c-line);
  border-top: 3px solid var(--c-gold);
  transition: transform 140ms var(--ease), border-color 140ms var(--ease), box-shadow 140ms var(--ease);
}
.page-about .about-step:hover {
  transform: translateY(-2px);
  border-color: var(--c-gold);
  box-shadow: var(--shadow-1);
}
.page-about .about-step:last-child {
  border-top-color: var(--c-orange);
}
.page-about .about-step details {
  margin: 0;
}
.page-about .about-step summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) 16px;
  gap: 4px 12px;
  align-items: baseline;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
}
.page-about .about-step summary::-webkit-details-marker {
  display: none;
}
.page-about .about-step summary:focus-visible {
  outline: 2px solid var(--c-orange);
  outline-offset: -2px;
}
.page-about .about-step__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-clay);
}
.page-about .about-step__name {
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: 15px;
  line-height: 1.5;
  color: var(--c-ink);
}
.page-about .about-step__mark {
  position: relative;
  width: 12px;
  height: 12px;
  align-self: center;
}
.page-about .about-step__mark::before,
.page-about .about-step__mark::after {
  content: "";
  position: absolute;
  background: var(--c-orange-deep);
  transition: transform 180ms var(--ease), opacity 180ms var(--ease);
}
.page-about .about-step__mark::before {
  left: 0;
  top: 5px;
  width: 12px;
  height: 2px;
}
.page-about .about-step__mark::after {
  left: 5px;
  top: 0;
  width: 2px;
  height: 12px;
}
.page-about .about-step details[open] .about-step__mark::after {
  transform: scaleY(0);
  opacity: 0;
}
.page-about .about-step__body {
  margin: 0 16px;
  padding: 12px 0 16px;
  border-top: 1px solid var(--c-line);
}
.page-about .about-step__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--c-muted);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin: clamp(20px, 2.8vw, 30px) 0;
}
.page-about .about-partner {
  padding: 20px 20px 22px;
  background: var(--c-white);
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-grass);
  transition: transform 140ms var(--ease), border-color 140ms var(--ease), box-shadow 140ms var(--ease);
}
.page-about .about-partner:last-child {
  border-left-color: var(--c-clay);
}
.page-about .about-partner:hover {
  transform: translateY(-2px);
  border-color: var(--c-gold);
  box-shadow: var(--shadow-1);
}
.page-about .about-partner__kicker {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--c-orange-deep);
}
.page-about .about-partner h3 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.4;
  color: var(--c-ink);
}
.page-about .about-partner__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 9px;
}
.page-about .about-partner__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--c-muted);
}
.page-about .about-partner__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 2px;
  background: var(--c-gold);
}

/* ---------- 站点信息 ---------- */
.page-about .about-section--info {
  margin-top: clamp(16px, 2.4vw, 28px);
  padding: clamp(24px, 3.4vw, 40px) clamp(18px, 2.6vw, 30px) clamp(22px, 3vw, 34px);
  border-top: none;
  background: linear-gradient(160deg, var(--c-ink) 0%, var(--c-night) 100%);
  color: var(--c-paper);
}
.page-about .about-section--info .about-section__kicker {
  color: var(--c-gold);
}
.page-about .about-section--info h2 {
  color: var(--c-paper);
}
.page-about .about-facts {
  margin: 0 0 20px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  border-top: 1px solid var(--c-line-dark);
}
.page-about .about-facts__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2px;
  padding: 12px 0;
  border-bottom: 1px solid var(--c-line-dark-soft);
}
.page-about .about-facts dt {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: rgba(244, 241, 232, 0.6);
}
.page-about .about-facts dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--c-paper);
}
.page-about .about-facts dd.num {
  font-family: var(--font-mono);
  color: var(--c-gold-soft);
  letter-spacing: 0.02em;
}
.page-about .about-facts__note {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(244, 241, 232, 0.76);
}
.page-about .about-facts__note a {
  color: var(--c-gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(232, 178, 58, 0.45);
}
.page-about .about-facts__note a:hover,
.page-about .about-facts__note a:focus-visible {
  border-bottom-color: var(--c-gold);
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-facts__row {
    grid-template-columns: 150px minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }
}

@media (min-width: 760px) {
  .page-about .about-matrix {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-partners {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-timeline {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-about .about-flow {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0;
  }
  .page-about .about-flow__step {
    padding: 16px 20px 0 0;
  }
}

@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: var(--about-index-w) minmax(0, 1fr);
    align-items: start;
  }
  .page-about .about-index {
    position: sticky;
    top: 28px;
    padding-bottom: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index a::before,
  .page-about .about-matrix__col,
  .page-about .about-step,
  .page-about .about-partner,
  .page-about .about-step__mark::before,
  .page-about .about-step__mark::after {
    transition: none;
  }
  .page-about .about-matrix__col:hover,
  .page-about .about-step:hover,
  .page-about .about-partner:hover {
    transform: none;
  }
}
<<<END>>>