.page-about {
  --about-rule: rgba(20, 41, 77, 0.9);
  --about-hair: rgba(169, 180, 200, 0.22);
  --about-ink-on-paper: #0A1020;
  --about-paper-muted: #4A5268;
  display: block;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: 20px 0 44px;
  background:
    radial-gradient(120% 90% at 84% 0%, rgba(79, 209, 255, 0.11), transparent 58%),
    radial-gradient(90% 70% at 0% 100%, rgba(182, 255, 59, 0.09), transparent 62%),
    var(--ink);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(to right, rgba(20, 41, 77, 0.55) 1px, transparent 1px);
  background-size: 76px 100%;
  opacity: 0.55;
  pointer-events: none;
}

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

.page-about .about-hero .breadcrumb {
  margin-bottom: 28px;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--signal);
  border: 1px solid rgba(182, 255, 59, 0.4);
  text-transform: uppercase;
}

.page-about .about-hero__kicker::before {
  content: "";
  width: 7px;
  height: 7px;
  background: var(--signal);
  display: inline-block;
}

.page-about .about-hero__title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-size: clamp(2.35rem, 10.5vw, 5.4rem);
  font-weight: 800;
  line-height: 0.98;
  letter-spacing: -0.03em;
  color: var(--paper);
}

.page-about .about-hero__hl {
  color: var(--signal);
  position: relative;
}

.page-about .about-hero__hl::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.06em;
  height: 0.08em;
  background: var(--alert);
  opacity: 0.85;
}

.page-about .about-hero__lead {
  max-width: 62ch;
  margin: 0 0 26px;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--muted);
}

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

.page-about .about-hero__actions .btn {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  padding: 0 22px;
  font-size: 0.95rem;
  text-decoration: none;
}

.page-about .about-hero__figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-figure {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px;
  background: var(--panel);
}

.page-about .about-figure__num {
  font-family: var(--font-mono);
  font-size: clamp(1.85rem, 8vw, 2.9rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--signal);
}

.page-about .about-figure__unit {
  font-size: 0.5em;
  margin-left: 2px;
  color: var(--signal-dim);
}

.page-about .about-figure__label {
  font-size: 0.8rem;
  color: var(--muted);
  letter-spacing: 0.04em;
}

/* ---------- 章节索引 ---------- */

.page-about .about-index {
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}

.page-about .about-index__list {
  display: flex;
  gap: 4px;
  margin: 0;
  padding: 10px 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-index__item a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 14px;
  font-size: 0.86rem;
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  border: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-index__item a:hover,
.page-about .about-index__item a:focus-visible {
  color: var(--paper);
  border-color: var(--signal-dim);
}

.page-about .about-index__no {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--signal);
}

/* ---------- 01 起点（暖纸色） ---------- */

.page-about .about-chapter {
  background: var(--paper);
  color: var(--about-ink-on-paper);
  padding: 52px 0 56px;
}

.page-about .about-chapter__grid {
  display: grid;
  gap: 24px;
}

.page-about .about-chapter__rail {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(10, 16, 32, 0.2);
}

.page-about .about-chapter__no {
  font-family: var(--font-mono);
  font-size: 2.2rem;
  font-weight: 700;
  line-height: 1;
  color: var(--alert);
}

.page-about .about-chapter__kicker {
  font-family: var(--font-editorial);
  font-size: 1.05rem;
  letter-spacing: 0.16em;
  color: var(--about-paper-muted);
}

.page-about .about-chapter__title {
  margin: 0 0 20px;
  font-family: var(--font-editorial);
  font-size: clamp(1.6rem, 6.4vw, 2.6rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--about-ink-on-paper);
}

.page-about .about-chapter__para {
  margin: 0 0 16px;
  font-size: 1rem;
  line-height: 1.85;
  color: #1B2237;
}

.page-about .about-chapter__facts {
  display: grid;
  gap: 1px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  background: rgba(10, 16, 32, 0.16);
  border-top: 1px solid rgba(10, 16, 32, 0.16);
  border-bottom: 1px solid rgba(10, 16, 32, 0.16);
}

.page-about .about-chapter__facts li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 16px;
  background: var(--paper-2);
  font-size: 0.92rem;
  color: var(--about-paper-muted);
}

.page-about .about-chapter__fact-num {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--about-ink-on-paper);
}

/* ---------- 02 赛季 ---------- */

.page-about .about-seasons {
  padding: 52px 0 56px;
  background: var(--ink);
}

.page-about .about-seasons__figure {
  margin: 4px 0 36px;
}

.page-about .about-seasons__note {
  margin: 30px 0 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-seasons__note a {
  color: var(--signal);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-seasons__note a:hover {
  color: var(--signal-dim);
}

.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 22px;
  list-style: none;
  border-left: 1px solid var(--line);
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 30px;
}

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

.page-about .about-timeline__marker {
  position: absolute;
  left: -27px;
  top: 8px;
  width: 9px;
  height: 9px;
  background: var(--alert);
  transform: rotate(45deg);
}

.page-about .about-timeline__range {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  color: var(--cyan);
  margin-bottom: 8px;
}

.page-about .about-timeline__heading {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 1.22rem;
  font-weight: 700;
  line-height: 1.35;
  color: var(--paper);
  letter-spacing: -0.01em;
}

.page-about .about-timeline__body p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 03 编辑组 ---------- */

.page-about .about-team {
  padding: 52px 0 56px;
  background: var(--panel);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-team__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-team__title {
  margin: 10px 0 24px;
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 6.6vw, 2.6rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.025em;
  color: var(--paper);
}

.page-about .about-team__numbers {
  display: flex;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-team__num {
  flex: 1 1 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px;
  background: var(--ink);
}

.page-about .about-team__num-value {
  font-family: var(--font-mono);
  font-size: 2.6rem;
  font-weight: 700;
  line-height: 1;
  color: var(--signal);
}

.page-about .about-team__num-label {
  font-size: 0.8rem;
  color: var(--muted);
}

.page-about .about-team__para {
  margin: 0 0 16px;
  font-size: 1rem;
  line-height: 1.85;
  color: #C4CDDD;
}

.page-about .about-team__steps {
  display: grid;
  gap: 1px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-team__step {
  padding: 18px 16px;
  background: var(--panel);
}

.page-about .about-team__step-no {
  display: inline-block;
  margin-bottom: 10px;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--ink);
  background: var(--signal);
}

.page-about .about-team__step h3 {
  margin: 0 0 8px;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-team__step p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 04 俱乐部简史（暖纸色） ---------- */

.page-about .about-clubs {
  padding: 52px 0 56px;
  background: var(--paper);
  color: var(--about-ink-on-paper);
}

.page-about .about-clubs__index,
.page-about .about-clubs__title {
  color: var(--about-ink-on-paper);
}

.page-about .about-clubs .section__lead {
  color: var(--about-paper-muted);
}

.page-about .about-clubs__layout {
  display: grid;
  gap: 28px;
  margin-top: 28px;
}

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

.page-about .about-clubs__filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 22px;
}

.page-about .about-clubs__filter .filter-bar__label {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  color: var(--about-paper-muted);
  margin-right: 4px;
}

.page-about .about-clubs__filter .filter-chip {
  min-height: 44px;
  padding: 0 14px;
  font-size: 0.85rem;
  color: var(--about-ink-on-paper);
  background: transparent;
  border: 1px solid rgba(10, 16, 32, 0.32);
  cursor: pointer;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-clubs__filter .filter-chip:hover,
.page-about .about-clubs__filter .filter-chip:focus-visible {
  border-color: var(--about-ink-on-paper);
}

.page-about .about-clubs__filter .filter-chip[aria-pressed="true"] {
  background: var(--about-ink-on-paper);
  color: var(--paper);
  border-color: var(--about-ink-on-paper);
}

.page-about .about-clubs__list {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: rgba(10, 16, 32, 0.14);
  border-top: 1px solid rgba(10, 16, 32, 0.16);
}

.page-about .about-clubs__item {
  padding: 18px 16px;
  background: var(--paper);
  border-bottom: 1px solid rgba(10, 16, 32, 0.16);
}

.page-about .about-clubs__count {
  display: inline-block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--alert);
}

.page-about .about-clubs__name {
  margin: 0 0 8px;
  font-family: var(--font-editorial);
  font-size: 1.24rem;
  font-weight: 700;
  color: var(--about-ink-on-paper);
}

.page-about .about-clubs__item p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.78;
  color: var(--about-paper-muted);
}

/* ---------- 05 选择理由 ---------- */

.page-about .about-reasons {
  padding: 52px 0 56px;
  background: var(--ink);
}

.page-about .about-reasons__grid {
  display: grid;
  gap: 1px;
  margin-top: 30px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-reason {
  padding: 24px 18px 26px;
  background: var(--ink);
  border-left: 3px solid transparent;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}

.page-about .about-reason:hover {
  border-left-color: var(--signal);
  background: var(--panel);
}

.page-about .about-reason__no {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1;
  color: var(--signal);
}

.page-about .about-reason__heading {
  margin: 0 0 10px;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--paper);
  letter-spacing: -0.01em;
}

.page-about .about-reason p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.82;
  color: var(--muted);
}

.page-about .about-reasons__note {
  margin: 26px 0 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.page-about .about-reasons__note a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-reasons__note a:hover {
  color: var(--signal);
}

/* ---------- 06 山西 ---------- */

.page-about .about-shanxi {
  padding: 52px 0 56px;
  background: var(--panel);
  border-top: 1px solid var(--line);
}

.page-about .about-shanxi__grid {
  display: grid;
  gap: 28px;
}

.page-about .about-shanxi__title {
  margin: 10px 0 20px;
  font-family: var(--font-editorial);
  font-size: clamp(1.6rem, 6.4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.25;
  color: var(--paper);
}

.page-about .about-shanxi__para {
  margin: 0 0 16px;
  font-size: 1rem;
  line-height: 1.85;
  color: #C4CDDD;
}

.page-about .about-shanxi__para a {
  color: var(--signal);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

/* ---------- CTA ---------- */

.page-about .about-cta {
  padding: 48px 0 54px;
  background:
    linear-gradient(135deg, rgba(182, 255, 59, 0.94), rgba(122, 204, 0, 0.94)),
    var(--signal);
  color: var(--ink);
}

.page-about .about-cta__grid {
  display: grid;
  gap: 26px;
}

.page-about .about-cta__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 6.4vw, 2.35rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.025em;
  color: var(--ink);
}

.page-about .about-cta__para {
  margin: 0;
  max-width: 56ch;
  font-size: 0.98rem;
  line-height: 1.8;
  color: #17231A;
}

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

.page-about .about-cta__btn {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  padding: 0 20px;
  font-size: 0.94rem;
  font-weight: 700;
  text-decoration: none;
  background: var(--ink);
  color: var(--signal);
  border: 1px solid var(--ink);
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .about-cta__btn:hover,
.page-about .about-cta__btn:focus-visible {
  background: #03060D;
}

.page-about .about-cta__btn--outline {
  background: transparent;
  color: var(--ink);
  border-color: rgba(7, 11, 20, 0.55);
}

.page-about .about-cta__btn--outline:hover,
.page-about .about-cta__btn--outline:focus-visible {
  background: rgba(7, 11, 20, 0.12);
  color: var(--ink);
}

/* ---------- 滚动显现 ---------- */

.has-js .page-about [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.4s var(--ease), transform 0.4s var(--ease);
}

.has-js .page-about [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-about .about-hero {
    padding: 28px 0 60px;
  }

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

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

  .page-about .about-chapter__facts li {
    flex-direction: column;
    gap: 8px;
  }

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

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

  .page-about .about-cta__grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    align-items: center;
  }

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

@media (min-width: 1024px) {
  .page-about .about-hero {
    padding: 30px 0 76px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
    align-items: end;
  }

  .page-about .about-hero__lead {
    font-size: 1.05rem;
  }

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

  .page-about .about-figure {
    padding: 22px 20px;
  }

  .page-about .about-index__list {
    justify-content: flex-start;
    gap: 6px;
  }

  .page-about .about-chapter {
    padding: 76px 0 80px;
  }

  .page-about .about-chapter__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 48px;
  }

  .page-about .about-chapter__rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    border-bottom: none;
    border-left: 1px solid rgba(10, 16, 32, 0.22);
    padding: 0 0 0 18px;
  }

  .page-about .about-seasons {
    padding: 76px 0 80px;
  }

  .page-about .about-timeline {
    padding-left: 0;
    border-left: none;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
    border-top: 1px solid var(--line);
  }

  .page-about .about-timeline__item {
    padding: 26px 22px 0 0;
    border-right: 1px solid var(--line);
  }

  .page-about .about-timeline__item:last-child {
    border-right: none;
    padding-right: 0;
  }

  .page-about .about-timeline__marker {
    left: 0;
    top: -5px;
  }

  .page-about .about-team {
    padding: 76px 0 80px;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 56px;
  }

  .page-about .about-clubs {
    padding: 76px 0 80px;
  }

  .page-about .about-clubs__layout {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-reasons {
    padding: 76px 0 80px;
  }

  .page-about .about-shanxi {
    padding: 76px 0 80px;
  }

  .page-about .about-shanxi__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
    align-items: center;
  }

  .page-about .about-cta {
    padding: 64px 0 68px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal],
  .has-js .page-about [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}