.page-about {
  --about-rule: 1px solid var(--hairline);
  --about-rule-strong: 1px solid var(--hairline-strong);
  --about-section-gap: clamp(56px, 8vw, 112px);
}

.page-about :where(a) {
  color: var(--cyan);
  text-decoration: none;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs {
  padding-top: clamp(20px, 3vw, 32px);
}

.page-about .crumbs {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--rock);
  display: flex;
  align-items: center;
  gap: 8px;
}

.page-about .crumbs a {
  color: var(--warm);
  border-bottom: 1px solid transparent;
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}

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

.page-about .crumbs [aria-current="page"] {
  color: var(--cyan);
}

/* ---------- 首屏 ---------- */
.page-about .about-intro {
  padding-top: clamp(28px, 5vw, 56px);
  padding-bottom: clamp(24px, 4vw, 40px);
}

.page-about .about-kicker {
  margin: 0 0 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 10px;
  border: 1px solid var(--hairline-cyan);
  background: var(--tint-cyan);
}

.page-about .about-h1 {
  margin: 0 0 24px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(26px, 4.4vw, 52px);
  line-height: 1.24;
  letter-spacing: 0.01em;
  color: var(--cream);
  max-width: 22em;
}

.page-about .about-lede {
  margin: 0;
  max-width: 40em;
  font-family: var(--font-serif);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: var(--warm);
}

.page-about .about-stats {
  list-style: none;
  margin: clamp(32px, 5vw, 52px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: var(--about-rule-strong);
  border-left: var(--about-rule);
}

.page-about .about-stat {
  padding: 18px 16px 20px;
  border-right: var(--about-rule);
  border-bottom: var(--about-rule);
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(30px, 4.6vw, 46px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-about .about-stat__unit {
  font-size: 0.5em;
  margin-left: 2px;
  letter-spacing: 0;
  color: var(--cyan-dim);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--rock);
}

/* ---------- 首图 ---------- */
.page-about .about-hero {
  margin: 0;
  padding-top: clamp(8px, 2vw, 16px);
}

.page-about .about-hero__media {
  position: relative;
  border: var(--about-rule);
  background: var(--ink-800);
}

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

.page-about .about-hero__cap {
  display: block;
  padding: 10px 12px;
  border-top: var(--about-rule);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--rock);
}

/* ---------- 章节通用 ---------- */
.page-about .about-section {
  padding-top: var(--about-section-gap);
}

.page-about .about-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 16px;
  padding-bottom: 14px;
  margin-bottom: clamp(24px, 3.5vw, 40px);
  border-bottom: var(--about-rule-strong);
}

.page-about .about-head__index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  padding: 3px 7px;
  border: 1px solid var(--hairline-cyan);
  background: var(--tint-cyan);
}

.page-about .about-head__title {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(19px, 2.6vw, 30px);
  line-height: 1.35;
  letter-spacing: 0.01em;
  color: var(--cream);
  flex: 1 1 18em;
}

.page-about .about-head__note {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--rock);
  white-space: nowrap;
}

/* ---------- 01 业务四条 ---------- */
.page-about .about-wide-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
}

.page-about .about-text p {
  margin: 0 0 18px;
  font-family: var(--font-serif);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.9;
  color: var(--warm);
}

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

.page-about .about-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--about-rule);
}

.page-about .about-list__item {
  padding: 16px 0;
  border-bottom: var(--about-rule);
}

.page-about .about-list__term {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 16px;
  color: var(--cream);
}

.page-about .about-list__desc {
  display: block;
  font-family: var(--font-serif);
  font-size: 14px;
  line-height: 1.8;
  color: var(--warm);
}

/* ---------- 02 团队三分带 ---------- */
.page-about .about-crew {
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--hairline);
  border: var(--about-rule);
}

.page-about .about-crew__band {
  background: var(--ink-800);
  padding: clamp(20px, 3vw, 32px);
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 8px 16px;
  transition: background var(--dur-fast) var(--ease);
}

.page-about .about-crew__band:hover {
  background: var(--ink-700);
}

.page-about .about-crew__band--a {
  border-left: 4px solid var(--cyan);
}

.page-about .about-crew__band--b {
  border-left: 4px solid var(--cyan-dim);
}

.page-about .about-crew__band--c {
  border-left: 4px solid var(--moss);
}

.page-about .about-crew__num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-about .about-crew__band--c .about-crew__num {
  color: var(--warm);
}

.page-about .about-crew__role {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 18px;
  color: var(--cream);
}

.page-about .about-crew__desc {
  grid-column: 1 / -1;
  margin: 0;
  font-family: var(--font-serif);
  font-size: 14px;
  line-height: 1.85;
  color: var(--warm);
  max-width: 46em;
}

/* ---------- 03 流程 ---------- */
.page-about .about-flow-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 44px);
}

.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: 20px;
  border-top: var(--about-rule-strong);
}

.page-about .about-flow__dot {
  position: absolute;
  top: -4px;
  left: 0;
  width: 7px;
  height: 7px;
  background: var(--cyan);
}

.page-about .about-flow__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--cyan);
  margin-bottom: 10px;
}

.page-about .about-flow__title {
  margin: 0 0 10px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.4;
  color: var(--cream);
}

.page-about .about-flow__text {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 14px;
  line-height: 1.85;
  color: var(--warm);
}

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

.page-about .about-flow__media {
  border: var(--about-rule);
  background: var(--ink-800);
}

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

.page-about .about-flow__figure figcaption {
  padding: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--rock);
}

/* ---------- 04 覆盖 ---------- */
.page-about .about-coverage {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
}

.page-about .about-coverage__intro {
  margin: 0 0 16px;
  font-family: var(--font-serif);
  font-size: 15px;
  line-height: 1.85;
  color: var(--warm);
}

.page-about .about-leagues {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--about-rule);
}

.page-about .about-league {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 12px 10px;
  border-bottom: var(--about-rule);
  transition: background var(--dur-fast) var(--ease);
}

.page-about .about-league:hover {
  background: var(--moss);
}

.page-about .about-league__name {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 15px;
  color: var(--cream);
}

.page-about .about-league__meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--rock);
}

.page-about .about-league:hover .about-league__meta {
  color: var(--cream);
}

.page-about .about-coverage__notes p {
  margin: 0 0 18px;
  font-family: var(--font-serif);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.9;
  color: var(--warm);
}

.page-about .about-coverage__links {
  padding-top: 14px;
  border-top: var(--about-rule);
  font-size: 14px !important;
}

.page-about .about-coverage__links a {
  color: var(--cyan);
  border-bottom: 1px solid var(--hairline-cyan);
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}

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

/* ---------- 05 时间线 ---------- */
.page-about .about-section--narrow {
  width: 100%;
  max-width: min(100% - 2 * var(--pad), 860px);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--pad);
  padding-right: var(--pad);
}

.page-about .about-section--narrow .about-head {
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 0 0 clamp(26px, 4vw, 40px) clamp(20px, 3vw, 28px);
  border-left: 1px solid var(--hairline);
  transition: background var(--dur-mid) var(--ease);
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  top: 10px;
  left: -4px;
  width: 7px;
  height: 7px;
  background: var(--rock);
  transition: background var(--dur-fast) var(--ease);
}

.page-about .about-timeline__item:target {
  background: var(--tint-cyan);
}

.page-about .about-timeline__item:target::before {
  background: var(--cyan);
}

.page-about .about-timeline__year {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(26px, 4vw, 40px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--warm);
  border-bottom: 1px solid transparent;
  justify-self: start;
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}

.page-about .about-timeline__year:hover,
.page-about .about-timeline__year:focus-visible,
.page-about .about-timeline__item:target .about-timeline__year {
  color: var(--cyan);
  border-bottom-color: var(--hairline-cyan);
}

.page-about .about-timeline__title {
  margin: 6px 0 8px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 17px;
  color: var(--cream);
}

.page-about .about-timeline__text {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 14px;
  line-height: 1.85;
  color: var(--warm);
}

.page-about .about-timeline__figure {
  margin: clamp(28px, 4vw, 44px) 0 0;
}

.page-about .about-timeline__media {
  border: var(--about-rule);
  background: var(--ink-800);
}

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

.page-about .about-timeline__figure figcaption {
  padding-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--rock);
}

/* ---------- 06 合作方 ---------- */
.page-about .about-partners__lead {
  margin-bottom: 20px;
  max-width: 52em;
}

.page-about .about-partners {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--about-rule-strong);
}

.page-about .about-partners__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 6px 14px;
  padding: 14px 10px;
  border-bottom: var(--about-rule);
  transition: background var(--dur-fast) var(--ease);
}

.page-about .about-partners__row:hover,
.page-about .about-partners__row:focus-within {
  background: var(--tint-cyan);
}

.page-about .about-partners__name {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 16px;
  color: var(--cream);
}

.page-about .about-partners__count {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
  white-space: nowrap;
}

.page-about .about-partners__tags {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height var(--dur-mid) var(--ease), opacity var(--dur-mid) var(--ease), margin-top var(--dur-mid) var(--ease);
}

.page-about .about-partners__row:hover .about-partners__tags,
.page-about .about-partners__row:focus-within .about-partners__tags {
  max-height: 120px;
  opacity: 1;
  margin-top: 6px;
}

.page-about .about-chip {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  padding: 3px 8px;
  border: 1px solid var(--hairline-cyan);
  background: var(--ink-900);
  white-space: nowrap;
}

.page-about .about-partners__note {
  margin: 18px 0 0;
  font-family: var(--font-serif);
  font-size: 14px;
  line-height: 1.85;
  color: var(--warm);
  max-width: 52em;
}

/* ---------- 07 CTA ---------- */
.page-about .about-section--cta {
  padding-bottom: clamp(56px, 8vw, 104px);
}

.page-about .about-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
  padding: clamp(24px, 4vw, 40px);
  border: 1px solid var(--hairline-cyan);
  background: linear-gradient(180deg, var(--tint-cyan) 0%, transparent 68%);
}

.page-about .about-cta__title {
  margin: 0 0 16px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(20px, 2.8vw, 30px);
  line-height: 1.35;
  color: var(--cream);
}

.page-about .about-cta__text p:not(.about-kicker) {
  margin: 0;
  max-width: 40em;
  font-family: var(--font-serif);
  font-size: 15px;
  line-height: 1.9;
  color: var(--warm);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-wide-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-about .about-coverage {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-about .about-league {
    grid-template-columns: 5em minmax(0, 1fr);
    align-items: baseline;
    gap: 12px;
  }

  .page-about .about-timeline__item {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: clamp(16px, 3vw, 36px);
    align-items: start;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1024px) {
  .page-about .about-flow-grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    align-items: start;
  }

  .page-about .about-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(20px, 3vw, 36px);
  }

  .page-about .about-crew {
    flex-direction: row;
  }

  .page-about .about-crew__band {
    flex: 1 1 auto;
  }

  .page-about .about-crew__band--a {
    flex-basis: 38.9%;
  }

  .page-about .about-crew__band--b {
    flex-basis: 33.3%;
  }

  .page-about .about-crew__band--c {
    flex-basis: 27.8%;
  }
}

@media (max-width: 719px) {
  .page-about .about-partners__tags {
    max-height: 160px;
    opacity: 1;
    margin-top: 6px;
  }

  .page-about .about-partners__row {
    padding-inline: 0;
  }

  .page-about .about-head__note {
    white-space: normal;
  }

  .page-about .about-cta__actions .btn {
    flex: 1 1 100%;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0ms !important;
    animation-duration: 0ms !important;
  }
}
<<<END>>>