.page-topics {
  display: block;
  background: var(--color-surface);
}

.page-topics .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1) var(--space-2);
  padding: var(--space-4) 0 0;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-topics .crumbs a {
  color: var(--color-primary);
  font-weight: var(--weight-heading);
  text-decoration: none;
}

.page-topics .crumbs a:hover,
.page-topics .crumbs a:focus-visible {
  color: var(--color-accent);
}

.page-topics .crumbs__sep {
  color: var(--color-line);
}

/* ---------- 首屏 ---------- */
.page-topics .topics-hero {
  padding: var(--space-6) 0 var(--section-y);
}

.page-topics .topics-hero__title {
  margin: var(--space-3) 0 var(--space-4);
  font-family: var(--font-heading);
  font-size: var(--text-display);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-topics .topics-hero__lede {
  max-width: var(--measure);
  margin: 0;
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-topics .hero-figures {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin-top: var(--space-6);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-topics .hero-figure {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding-left: var(--space-3);
  border-left: 2px solid var(--color-contrast-line);
}

.page-topics .hero-figures .data-band__label {
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
}

.page-topics .hero-figures__scale {
  position: absolute;
  inset: auto 0 0 0;
  height: 3px;
  background: repeating-linear-gradient(
    90deg,
    var(--color-contrast-accent) 0 2px,
    transparent 2px 14px
  );
  opacity: 0.7;
}

.page-topics .hero-index {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2);
  margin: var(--space-6) 0 0;
  padding: 0;
  list-style: none;
}

.page-topics .hero-index__card {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  min-height: 132px;
  padding: var(--space-3);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1);
}

.page-topics .hero-index__card--a { background: var(--color-primary-soft); }
.page-topics .hero-index__card--b { background: var(--color-highlight); }
.page-topics .hero-index__card--c { background: var(--color-surface-deep); }
.page-topics .hero-index__card--d { background: var(--color-surface-alt); }
.page-topics .hero-index__card--e {
  background: color-mix(in srgb, var(--color-primary-soft) 55%, var(--color-highlight));
}

.page-topics .hero-index__num {
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  color: var(--color-primary);
}

.page-topics .hero-index__name {
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-topics .hero-index__meta {
  margin-top: auto;
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

/* ---------- 筛选 ---------- */
.page-topics .topics-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) 0;
  margin-bottom: var(--space-6);
}

.page-topics .topics-filter__label {
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.page-topics .filter-chip {
  padding: 6px var(--space-2);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  color: var(--color-ink-soft);
  font-family: inherit;
  font-size: var(--text-sm);
  cursor: pointer;
  transition: background 160ms ease, color 160ms ease, border-color 160ms ease;
}

.page-topics .filter-chip:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.page-topics .filter-chip[aria-pressed="true"],
.page-topics .filter-chip.is-active {
  background: var(--color-highlight);
  border-color: var(--color-focus);
  color: var(--color-primary);
  font-weight: var(--weight-heading);
}

.page-topics .filter-chip:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.page-topics .topics-filter__status {
  margin-left: auto;
  font-size: var(--text-xs);
  font-variant-numeric: tabular-nums;
  color: var(--color-ink-muted);
}

/* ---------- 专题段 ---------- */
.page-topics .topic-block {
  padding: var(--section-y) 0;
}

.page-topics .topic-block--odds { background: var(--color-surface-alt); }
.page-topics .topic-block--away { background: var(--color-surface); }
.page-topics .topic-block--referee { background: var(--color-surface-deep); }
.page-topics .topic-block--discipline { background: var(--color-surface-alt); }
.page-topics .topic-block--awards { background: var(--color-primary-soft); }

.page-topics .topic-block__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.page-topics .topic-block__body {
  position: relative;
  padding-left: var(--space-4);
}

.page-topics .topic-block__body::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 4px;
  border-radius: var(--radius-pill);
  background: var(--color-primary);
}

.page-topics .topic-block--away .topic-block__body::before { background: var(--color-accent); }

.page-topics .topic-block__head {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.page-topics .topic-block__num {
  font-size: var(--text-lg);
  letter-spacing: 0.08em;
  color: var(--color-primary);
}

.page-topics .topic-block__head .title-xl {
  margin: 0;
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-topics .topic-block__value {
  max-width: var(--measure);
  margin: 0 0 var(--space-3);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-topics .topic-block__text {
  max-width: var(--measure);
  margin: 0 0 var(--space-4);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-topics .topic-metrics {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin: 0 0 var(--space-3);
}

.page-topics .topic-metrics__label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.page-topics .topic-metrics__list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-topics .topic-metrics__list li {
  padding: 4px var(--space-2);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  color: var(--color-ink);
  font-size: var(--text-sm);
  box-shadow: var(--shadow-1);
}

.page-topics .topic-block--awards .topic-metrics__list li {
  background: var(--color-surface-alt);
}

.page-topics .topic-freq {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin: 0 0 var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.page-topics .topic-freq__ticks {
  display: flex;
  gap: 3px;
  flex: 1 1 140px;
  max-width: 220px;
}

.page-topics .topic-freq__ticks i {
  display: block;
  flex: 1 1 auto;
  height: 8px;
  border-radius: var(--radius-pill);
  background: var(--color-surface-deep);
}

.page-topics .topic-block--odds .topic-freq__ticks i,
.page-topics .topic-block--discipline .topic-freq__ticks i {
  background: var(--color-surface);
}

.page-topics .topic-freq__ticks i.is-on {
  background: var(--color-accent);
}

.page-topics .topic-freq__unit {
  font-variant-numeric: tabular-nums;
}

.page-topics .topic-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  padding-bottom: 2px;
  transition: color 160ms ease, border-color 160ms ease;
}

.page-topics .topic-link:hover,
.page-topics .topic-link:focus-visible {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.page-topics .topic-link:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

.page-topics .topic-link__num {
  font-size: var(--text-sm);
}

.page-topics .topic-block__media {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface-deep);
  box-shadow: var(--shadow-2);
}

.page-topics .topic-block__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

@media (min-width: 900px) {
  .page-topics .topic-block__media img {
    aspect-ratio: 10 / 7;
  }
}

/* ---------- 收口 ---------- */
.page-topics .topics-exit {
  padding: var(--section-y) 0 var(--space-8);
  background: var(--color-surface-deep);
}

.page-topics .topics-exit .title-lg {
  margin: var(--space-2) 0 var(--space-3);
  font-size: var(--text-3xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-topics .topics-exit__lede {
  max-width: var(--measure);
  margin: 0 0 var(--space-6);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-topics .exit-links {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-topics .exit-links__item {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto;
  column-gap: var(--space-2);
  row-gap: var(--space-1);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: var(--shadow-1);
}

.page-topics .exit-links__num {
  grid-row: 1 / 3;
  align-self: start;
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: var(--color-primary);
}

.page-topics .exit-links__item a {
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 160ms ease, border-color 160ms ease;
}

.page-topics .exit-links__item a:hover,
.page-topics .exit-links__item a:focus-visible {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.page-topics .exit-links__item a:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

.page-topics .exit-links__note {
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-muted);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-topics .hero-figures {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-4);
    padding: var(--space-6) var(--space-4);
  }

  .page-topics .hero-index {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-topics .exit-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-topics .hero-index {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    align-items: start;
    gap: var(--space-3);
  }

  .page-topics .hero-index__card:nth-child(1) { margin-top: var(--space-6); }
  .page-topics .hero-index__card:nth-child(2) { margin-top: var(--space-4); }
  .page-topics .hero-index__card:nth-child(3) { margin-top: 0; }
  .page-topics .hero-index__card:nth-child(4) { margin-top: var(--space-4); }
  .page-topics .hero-index__card:nth-child(5) { margin-top: var(--space-6); }

  .page-topics .topic-block__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
    gap: var(--space-8);
  }

  .page-topics .topic-block--away .topic-block__grid,
  .page-topics .topic-block--discipline .topic-block__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-topics .topic-block--away .topic-block__body,
  .page-topics .topic-block--discipline .topic-block__body {
    order: 2;
  }

  .page-topics .topic-block--away .topic-block__media,
  .page-topics .topic-block--discipline .topic-block__media {
    order: 1;
  }
}

@media (min-width: 1024px) {
  .page-topics .topics-hero {
    padding-top: var(--space-8);
  }

  .page-topics .exit-links {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-topics .filter-chip,
  .page-topics .topic-link,
  .page-topics .exit-links__item a {
    transition: none;
  }
}