.page-about {
  --about-narrow: 860px;
  --about-node: 11px;
  background: var(--bg);
  color: var(--fg);
  overflow-x: hidden;
}

.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}

.page-about img {
  display: block;
  max-width: 100%;
  height: auto;
}

.page-about a {
  color: inherit;
}

.page-about a:focus-visible,
.page-about summary:focus-visible {
  outline: 2px solid var(--gold-600);
  outline-offset: 2px;
}

/* ---------- 通用排版 ---------- */

.page-about .about-kicker {
  color: var(--gold-900);
  margin: 0;
}

.page-about .about-kicker--gold {
  color: var(--gold-300);
}

.page-about .about-h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 3.4vw, 2.35rem);
  line-height: 1.18;
  letter-spacing: -0.01em;
  margin: 14px 0 0;
  color: var(--ink-900);
}

.page-about .about-h2--light {
  color: var(--cream-50);
}

.page-about .about-lead {
  max-width: 62ch;
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--umber-700);
}

.page-about .about-lead--light {
  color: rgba(251, 247, 239, 0.82);
}

/* ---------- A-01 首屏 ---------- */

.page-about .about-hero {
  padding: 32px 0 0;
}

.page-about .about-hero__inner {
  display: grid;
  gap: 22px;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 30px;
  align-items: end;
}

.page-about .about-hero__eyebrow {
  margin: 0 0 16px;
}

.page-about .about-hero__title {
  margin: 0;
  font-size: clamp(2rem, 6.2vw, 4.4rem);
  line-height: 1.02;
}

.page-about .about-hero__lead {
  max-width: 46ch;
  margin: 22px 0 0;
  font-size: 17px;
  line-height: 1.78;
  color: var(--umber-700);
}

.page-about .about-hero__lead--tight {
  margin-top: 12px;
  font-size: 14px;
  color: var(--slate-500);
}

.page-about .about-hero__panel {
  border: 1px solid var(--line-strong);
  border-top: 3px solid var(--crimson-700);
  background: var(--parchment-100);
  padding: 22px 20px 20px;
}

.page-about .about-hero__panel-head {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--gold-900);
}

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

.page-about .about-facts__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-facts__row dt {
  font-size: 13px;
  color: var(--slate-500);
}

.page-about .about-facts__row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
  color: var(--ink-900);
  text-align: right;
}

.page-about .about-hero__panel-note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate-500);
}

.page-about .about-hero__figure {
  margin: 38px 0 0;
  border-top: 1px solid var(--line-gold);
}

/* ---------- A-02 时间轴 ---------- */

.page-about .about-timeline {
  margin-top: 56px;
  padding: 68px 0 74px;
}

.page-about .tl {
  list-style: none;
  position: relative;
  max-width: var(--about-narrow);
  margin: 42px auto 0;
  padding: 0 0 0 32px;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: var(--line-gold);
}

.page-about .tl__item {
  position: relative;
  padding-bottom: 26px;
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 11px;
  width: var(--about-node);
  height: var(--about-node);
  border: 1px solid var(--gold-600);
  border-radius: 50%;
  background: var(--gold-600);
}

.page-about .tl__item.is-active::before {
  background: transparent;
  box-shadow: 0 0 0 4px rgba(192, 138, 30, 0.18);
}

.page-about .tl__item--media::before {
  display: none;
}

.page-about .tl__item--media {
  padding-bottom: 30px;
}

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

.page-about .tl__node {
  border: 0;
}

.page-about .tl__summary {
  position: relative;
  display: grid;
  gap: 5px;
  padding: 4px 30px 6px 0;
  cursor: pointer;
  list-style: none;
}

.page-about .tl__summary::-webkit-details-marker {
  display: none;
}

.page-about .tl__summary::after {
  content: "+";
  position: absolute;
  right: 2px;
  top: 4px;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1;
  color: var(--gold-600);
}

.page-about .tl__node[open] .tl__summary::after {
  content: "−";
}

.page-about .tl__year {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--gold-900);
  font-variant-numeric: tabular-nums;
}

.page-about .tl__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  line-height: 1.4;
  color: var(--ink-900);
}

.page-about .tl__say {
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate-500);
}

.page-about .tl__body {
  margin: 8px 0 4px;
  padding: 2px 0 2px 16px;
  border-left: 2px solid var(--crimson-700);
  font-size: 15px;
  line-height: 1.78;
  color: var(--umber-700);
}

.page-about .tl__body p {
  margin: 0;
}

/* ---------- A-03 团队 ---------- */

.page-about .about-team {
  padding: 72px 0 78px;
}

.page-about .about-team__grid {
  display: grid;
  margin-top: 40px;
  border-top: 1px solid var(--line-strong);
}

.page-about .about-team__col {
  padding: 22px 0 24px;
  border-bottom: 1px solid var(--line);
}

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

.page-about .about-team__no {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--gold-600);
}

.page-about .about-team__col h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.4;
  color: var(--ink-900);
}

.page-about .about-team__col p {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.78;
  color: var(--umber-700);
}

.page-about .about-team__col ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 7px;
}

.page-about .about-team__col li {
  position: relative;
  padding-left: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  line-height: 1.6;
  color: var(--slate-500);
}

.page-about .about-team__col li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 1px;
  background: var(--gold-600);
}

/* ---------- A-04 编辑原则 ---------- */

.page-about .about-edit {
  padding: 70px 0 76px;
  background: var(--ink-900);
  color: var(--cream-50);
}

.page-about .about-edit__figure {
  margin: 34px 0 0;
  border-top: 1px solid var(--line-cream);
}

.page-about .about-edit .frame__credit {
  color: rgba(231, 200, 115, 0.7);
}

.page-about .about-edit__steps {
  list-style: none;
  margin: 40px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid rgba(231, 200, 115, 0.22);
  counter-reset: none;
}

.page-about .about-edit__step {
  padding: 22px 0;
  border-bottom: 1px solid rgba(231, 200, 115, 0.22);
}

.page-about .about-edit__no {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--gold-300);
}

.page-about .about-edit__step h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  color: var(--cream-50);
}

.page-about .about-edit__step p {
  margin: 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(251, 247, 239, 0.78);
}

.page-about .about-edit__sources {
  margin-top: 40px;
  padding: 24px 20px;
  border: 1px solid rgba(231, 200, 115, 0.3);
  background: var(--umber-700);
}

.page-about .about-edit__sources-head {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--gold-300);
}

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

.page-about .about-edit__source-list li {
  display: flex;
  gap: 10px;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(251, 247, 239, 0.86);
}

.page-about .about-edit__source-list .data-num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--gold-300);
  padding-top: 2px;
}

.page-about .about-edit__sources-note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(251, 247, 239, 0.62);
}

/* ---------- A-05 赛季专题 ---------- */

.page-about .about-season {
  padding: 72px 0 76px;
}

.page-about .about-season__grid {
  list-style: none;
  margin: 40px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line-strong);
}

.page-about .about-season__item {
  padding: 20px 0 22px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-season__stage {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--crimson-500);
}

.page-about .about-season__item h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  color: var(--ink-900);
}

.page-about .about-season__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--umber-700);
}

.page-about .about-season__note {
  max-width: 68ch;
  margin: 28px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--gold-600);
  font-size: 14px;
  line-height: 1.78;
  color: var(--slate-500);
}

/* ---------- A-06 备案与边界 ---------- */

.page-about .about-legal {
  padding: 66px 0 70px;
  background: var(--crimson-700);
  color: var(--cream-50);
}

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

.page-about .about-legal__list {
  margin: 0;
  border-top: 1px solid rgba(231, 200, 115, 0.3);
}

.page-about .about-legal__row {
  display: grid;
  gap: 6px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(231, 200, 115, 0.22);
}

.page-about .about-legal__row dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--gold-300);
}

.page-about .about-legal__row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(251, 247, 239, 0.92);
}

.page-about .about-legal__note {
  margin: 0;
  max-width: 66ch;
  font-size: 13px;
  line-height: 1.8;
  color: rgba(251, 247, 239, 0.72);
}

.page-about .about-legal__note a {
  color: var(--gold-300);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 底部横带 ---------- */

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

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

.page-about .about-ribbon__band {
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.page-about .ribbon__track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
}

.page-about .ribbon__item {
  flex: 0 0 auto;
  min-width: 210px;
  border-right: 1px solid var(--line);
}

.page-about .ribbon__item a {
  display: block;
  padding: 24px 20px 26px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 16px;
  line-height: 1.4;
  color: var(--ink-900);
  text-decoration: none;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .ribbon__item a:hover {
  background: var(--parchment-100);
  color: var(--crimson-700);
}

.page-about .ribbon__sub {
  display: block;
  margin-top: 9px;
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 13px;
  letter-spacing: 0;
  line-height: 1.6;
  color: var(--slate-500);
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .about-season__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 28px;
  }

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

@media (min-width: 820px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-team__col {
    padding: 24px 20px 26px;
    border-bottom: 0;
    border-right: 1px solid var(--line-strong);
  }

  .page-about .about-team__col:first-child {
    padding-left: 0;
  }

  .page-about .about-team__col:last-child {
    padding-right: 0;
    border-right: 0;
  }

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

  .page-about .about-edit__step {
    padding: 24px 24px 24px 0;
    border-bottom: 0;
    border-right: 1px solid rgba(231, 200, 115, 0.22);
  }

  .page-about .about-edit__step + .about-edit__step {
    padding-left: 24px;
  }

  .page-about .about-edit__step:last-child {
    border-right: 0;
    padding-right: 0;
  }

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

@media (min-width: 960px) {
  .page-about .about-hero {
    padding-top: 42px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 52px;
  }

  .page-about .about-hero__figure {
    margin-top: 54px;
  }

  .page-about .about-timeline {
    margin-top: 72px;
    padding: 84px 0 92px;
  }

  .page-about .about-team,
  .page-about .about-season {
    padding: 88px 0 94px;
  }

  .page-about .about-edit {
    padding: 86px 0 92px;
  }

  .page-about .about-legal {
    padding: 82px 0 88px;
  }

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

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

  .page-about .about-season__item + .about-season__item {
    padding-left: 22px;
  }

  .page-about .about-season__item:last-child {
    border-right: 0;
    padding-right: 0;
  }

  .page-about .about-season__grid {
    border-bottom: 1px solid var(--line-strong);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ribbon__item a {
    transition: none;
  }
}
</main>