.page-about {
  --about-panel: rgba(20, 30, 60, 0.62);
}

.page-about .prose p {
  margin: 0 0 16px;
  color: var(--text-dim);
  line-height: 1.85;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 22px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-mute);
}

.page-about .breadcrumb a {
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.2s;
}

.page-about .breadcrumb a:hover {
  color: var(--c-cyan);
}

.page-about .breadcrumb span[aria-current="page"] {
  color: var(--c-amber);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(26px, 4.5vw, 52px) 0 clamp(40px, 6vw, 76px);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(0, 229, 255, 0.14), transparent 60%),
    radial-gradient(90% 70% at 0% 100%, rgba(255, 90, 31, 0.1), transparent 65%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: var(--gap);
}

.page-about .about-hero h1 {
  margin: 0 0 18px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(2rem, 6vw, 3.25rem);
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .about-hero__lede {
  max-width: 60ch;
  margin: 0 0 26px;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text-dim);
}

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

.page-about .about-hero__readout {
  align-self: start;
  padding: 22px 20px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--glass);
  backdrop-filter: blur(10px);
}

.page-about .readout__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-cyan);
}

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

.page-about .readout__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 11px 0;
  border-bottom: 1px dashed var(--line);
}

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

.page-about .readout__row dt {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--text-mute);
}

.page-about .readout__row dd {
  margin: 0;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text);
  text-align: right;
}

.page-about .readout__row dd .num {
  color: var(--c-orange);
}

/* ---------- 章节标题 ---------- */
.page-about .about-head {
  display: grid;
  gap: 20px;
  margin-bottom: clamp(28px, 4vw, 44px);
}

.page-about .about-head h2 {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.5rem, 3.6vw, 2.35rem);
  line-height: 1.16;
  color: var(--text);
}

.page-about .about-head__lede {
  max-width: 62ch;
  margin: 14px 0 0;
  color: var(--text-dim);
  line-height: 1.85;
}

/* ---------- 平台简介 ---------- */
.page-about .about-intro {
  padding: var(--block) 0;
}

.page-about .about-intro__grid {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
}

.page-about .about-intro__text h2 {
  margin: 10px 0 20px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.5rem, 3.6vw, 2.35rem);
  line-height: 1.16;
  color: var(--text);
}

.page-about .about-intro__aside {
  display: grid;
  gap: 12px;
}

.page-about .audience-card {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--c-ink-3);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(20, 30, 60, 0.78), rgba(20, 30, 60, 0.32));
  transition: border-color 0.25s, border-left-color 0.25s, transform 0.25s;
}

.page-about .audience-card:hover {
  border-color: var(--line-strong);
  border-left-color: var(--c-orange);
  transform: translateX(4px);
}

.page-about .audience-card__role {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--c-cyan);
}

.page-about .audience-card__desc {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--text-dim);
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-coverage {
  padding: var(--block) 0;
  background: linear-gradient(180deg, rgba(42, 58, 92, 0.32), rgba(10, 17, 40, 0));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .coverage-mark {
  width: 100%;
  max-width: 320px;
  height: auto;
  display: block;
}

.page-about .coverage-grid {
  display: grid;
  gap: var(--gap);
}

.page-about .coverage-grid__figure {
  margin: 0;
}

.page-about .coverage-grid__figure .figure__media {
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
}

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

.page-about .figure__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.03em;
  color: var(--text-mute);
}

.page-about .coverage-leagues {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-about .league-card {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--about-panel);
  outline: none;
  transition: border-color 0.25s, background 0.25s, transform 0.25s;
}

.page-about .league-card:hover,
.page-about .league-card:focus-visible {
  border-color: var(--line-cyan);
  background: rgba(20, 30, 60, 0.85);
  transform: translateY(-2px);
}

.page-about .league-card__name {
  margin: 0;
  font-family: var(--font-head);
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--text);
}

.page-about .league-card__count {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--c-amber);
}

.page-about .league-card__count .num {
  color: var(--c-orange);
}

.page-about .league-card__reveal {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.35s ease;
}

.page-about .league-card:hover .league-card__reveal,
.page-about .league-card:focus-visible .league-card__reveal {
  grid-template-rows: 1fr;
}

.page-about .league-card__reveal > .league-card__list {
  overflow: hidden;
}

.page-about .league-card__list {
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-about .league-card__list li {
  padding-top: 10px;
  padding-left: 14px;
  position: relative;
}

.page-about .league-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20px;
  width: 6px;
  height: 1px;
  background: var(--c-cyan);
}

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

.page-about .coverage-stat {
  padding: 20px 18px;
  background: var(--c-ink-2);
}

.page-about .coverage-stat__num {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.5rem, 4vw, 2rem);
  color: var(--c-cyan);
  letter-spacing: -0.02em;
}

.page-about .coverage-stat__label {
  margin: 8px 0 0;
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  color: var(--text-mute);
}

/* ---------- 指标说明（奶油色文档块） ---------- */
.page-about .about-method {
  position: relative;
  padding: var(--block) 0;
  background: var(--c-cream);
  color: var(--c-brown);
  overflow: hidden;
}

.page-about .about-method::after {
  content: "";
  position: absolute;
  right: -70px;
  top: -70px;
  width: 220px;
  height: 220px;
  background: var(--c-orange);
  opacity: 0.12;
  transform: rotate(45deg);
  pointer-events: none;
}

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

.page-about .about-method .eyebrow {
  color: var(--c-brown);
  border-color: var(--c-orange);
}

.page-about .about-method h2 {
  max-width: 24ch;
  margin: 10px 0 18px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.5rem, 3.6vw, 2.35rem);
  line-height: 1.16;
  color: var(--c-brown);
}

.page-about .about-method__lede {
  max-width: 66ch;
  margin: 0;
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(26, 20, 16, 0.78);
}

.page-about .method-list {
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(26, 20, 16, 0.2);
}

.page-about .method-item {
  display: grid;
  gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid rgba(26, 20, 16, 0.2);
}

.page-about .method-item__name {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--c-brown);
}

.page-about .method-item__desc {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: rgba(26, 20, 16, 0.76);
}

.page-about .method-item:hover .method-item__name {
  color: var(--c-orange);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: var(--block) 0;
}

.page-about .team-grid {
  display: grid;
  gap: clamp(24px, 3.5vw, 40px);
}

.page-about .team-grid__figure {
  margin: 0;
}

.page-about .team-grid__figure .figure__media {
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
}

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

.page-about .team-grid__body p {
  margin: 0 0 16px;
  color: var(--text-dim);
  line-height: 1.85;
}

.page-about .team-facts {
  display: grid;
  gap: 10px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .team-facts li {
  padding: 12px 14px;
  border-left: 2px solid var(--c-cyan);
  background: rgba(20, 30, 60, 0.5);
  font-size: 0.9375rem;
  color: var(--text);
}

.page-about .team-facts .num {
  margin-right: 6px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--c-orange);
}

/* ---------- 发展历程 ---------- */
.page-about .about-history {
  padding: var(--block) 0;
  border-top: 1px solid var(--line);
}

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

.page-about .history-banner .figure__media {
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
}

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

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

.page-about .timeline__item {
  position: relative;
  padding: 0 0 28px 30px;
  border-left: 1px solid var(--line-strong);
  border-radius: var(--radius);
  transition: background 0.25s;
}

.page-about .timeline__item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  transform: translateX(-50%);
  background: var(--c-ink);
  border: 2px solid var(--c-amber);
  transition: background 0.25s, border-color 0.25s, box-shadow 0.25s;
}

.page-about .timeline__item:hover::before,
.page-about .timeline__item:focus-within::before {
  background: var(--c-cyan);
  border-color: var(--c-cyan);
  box-shadow: 0 0 0 5px rgba(0, 229, 255, 0.16);
}

.page-about .timeline__item:hover,
.page-about .timeline__item:focus-within {
  background: rgba(0, 229, 255, 0.05);
}

.page-about .timeline__stage {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-amber);
}

.page-about .timeline__title {
  margin: 6px 0 8px;
  font-family: var(--font-head);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text);
}

.page-about .timeline__note {
  margin: 0;
  max-width: 58ch;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 合作与认可 ---------- */
.page-about .about-partners {
  padding: var(--block) 0;
  background: linear-gradient(180deg, rgba(42, 58, 92, 0.3), rgba(10, 17, 40, 0));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .partner-grid {
  display: grid;
  gap: var(--gap);
}

.page-about .partner-card {
  padding: 22px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--about-panel);
  transition: border-color 0.25s, transform 0.25s;
}

.page-about .partner-card:hover {
  border-color: var(--line-cyan);
  transform: translateY(-3px);
}

.page-about .partner-card__num {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.75rem, 4.5vw, 2.5rem);
  line-height: 1;
  color: var(--c-orange);
}

.page-about .partner-card__title {
  margin: 12px 0 8px;
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
}

.page-about .partner-card__desc {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--text-mute);
}

/* ---------- 底部行动区 ---------- */
.page-about .about-cta {
  padding: clamp(40px, 6vw, 72px) 0;
}

.page-about .about-cta__inner {
  display: grid;
  gap: 24px;
  padding: clamp(26px, 4vw, 40px);
  border: 1px solid var(--line-strong);
  border-left: 3px solid var(--c-orange);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(0, 229, 255, 0.12), transparent 60%),
    var(--c-ink-2);
}

.page-about .about-cta h2 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.375rem, 3vw, 1.875rem);
  line-height: 1.2;
  color: var(--text);
}

.page-about .about-cta__text p {
  margin: 0;
  max-width: 56ch;
  color: var(--text-dim);
  line-height: 1.8;
}

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

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

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

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

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

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(280px, 0.85fr);
    align-items: start;
    gap: clamp(32px, 5vw, 64px);
  }

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

  .page-about .about-intro__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.85fr);
    align-items: start;
  }

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

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

  .page-about .method-item {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
  }

  .page-about .team-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    align-items: start;
  }

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

@media (hover: none) {
  .page-about .league-card__reveal {
    grid-template-rows: 1fr;
  }
}
<<<END>>>