.page-topics {
  --topic-span: span 12;
  --topic-radius: var(--radius-sm);
  display: block;
}

/* ---------- 首屏 ---------- */
.page-topics .topics-hero {
  position: relative;
  overflow: hidden;
  padding-block: var(--space-6) var(--space-8);
  background: var(--color-surface-alt);
}

.page-topics .topics-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-topics .topics-hero__bg img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.6;
}

.page-topics .topics-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(
    155deg,
    color-mix(in srgb, var(--color-primary-soft) 84%, transparent) 0%,
    color-mix(in srgb, var(--color-accent) 14%, transparent) 48%,
    color-mix(in srgb, var(--color-surface) 92%, transparent) 100%
  );
}

.page-topics .topics-hero__inner {
  position: relative;
  z-index: 2;
}

.page-topics .topics-hero .breadcrumb {
  margin-bottom: var(--space-6);
}

.page-topics .topics-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
}

.page-topics .topics-hero__title {
  margin: var(--space-2) 0 var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: -0.02em;
  color: var(--color-contrast-surface);
  overflow-wrap: break-word;
}

.page-topics .topics-hero__lead {
  margin: 0 0 var(--space-3);
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-topics .topics-hero__note {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-soft);
}

.page-topics .topics-hero__note a {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

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

.page-topics .topics-hero__figures {
  padding: var(--space-3);
}

.page-topics .topics-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3) var(--space-2);
}

.page-topics .topics-figures .stat__value {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: var(--weight-heading);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--color-contrast-accent);
  font-variant-numeric: tabular-nums;
}

.page-topics .topics-figures .stat__label {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: var(--color-contrast-ink);
  opacity: 0.78;
}

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

  .page-topics .topics-hero__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: var(--gutter);
    align-items: end;
  }

  .page-topics .topics-hero__headline {
    grid-column: 1 / span 5;
  }

  .page-topics .topics-hero__figures {
    grid-column: 6 / span 7;
    padding: var(--space-4);
  }

  .page-topics .topics-figures {
    gap: var(--space-4) var(--space-3);
  }
}

/* ---------- 区块标题 ---------- */
.page-topics .topics-sec__head {
  max-width: var(--measure);
  margin-bottom: var(--space-4);
}

.page-topics .topics-sec__head h2 {
  margin: var(--space-2) 0 var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-surface);
}

.page-topics .topics-sec__lead {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 分类索引 ---------- */
.page-topics .cat-rail {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(168px, 1fr));
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-topics .cat-rail__item {
  min-width: 0;
}

.page-topics .cat-rail__link {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  height: 100%;
  padding: var(--space-2);
  border-left: 2px solid var(--color-primary);
  border-top: var(--border-thin) solid var(--color-line);
  border-right: var(--border-thin) solid var(--color-line);
  border-bottom: var(--border-thin) solid var(--color-line);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: color-mix(in srgb, var(--color-primary-soft) 55%, transparent);
  text-decoration: none;
  transition: background-color 160ms var(--ease-out), border-color 160ms var(--ease-out);
}

.page-topics .cat-rail__link:hover {
  background: color-mix(in srgb, var(--color-highlight) 72%, transparent);
}

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

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

.page-topics .cat-rail__name {
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-surface);
}

.page-topics .cat-rail__count {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-accent);
  font-variant-numeric: tabular-nums;
}

.page-topics .cat-rail__state {
  align-self: flex-start;
  margin-top: auto;
}

/* ---------- 专题网格 ---------- */
.page-topics .topic-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-3);
}

.page-topics .topic {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--topic-radius);
  scroll-margin-top: calc(var(--topbar-h) + var(--space-3));
}

.page-topics .topic__body {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex: 1 1 auto;
  min-width: 0;
}

.page-topics .topic__media {
  position: relative;
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius-sm);
  background: var(--color-surface-deep);
  aspect-ratio: 16 / 9;
}

.page-topics .topic__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-topics .topic__media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: var(--overlay-scrim);
  opacity: 0.6;
}

.page-topics .topic__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding-bottom: var(--space-2);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-topics .topic__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-surface);
}

.page-topics .topic__quote {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-topics .topic__points {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-topics .topic__points li {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-2) 0;
  border-top: var(--border-thin) solid var(--color-line);
  font-size: var(--text-sm);
  line-height: 1.72;
  color: var(--color-ink);
}

.page-topics .topic__points li:last-child {
  padding-bottom: 0;
}

.page-topics .topic__key {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-primary);
}

.page-topics .topic__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  margin-top: auto;
  padding-top: var(--space-2);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-topics .topic__more {
  font-size: var(--text-sm);
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
}

.page-topics .topic__more:hover {
  color: var(--color-primary);
}

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

@media (min-width: 1024px) {
  .page-topics .topic-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: var(--space-4);
  }

  .page-topics .topic {
    grid-column: var(--topic-span);
    padding: var(--space-4);
  }

  .page-topics .topic--s4 {
    --topic-span: span 4;
    --topic-radius: var(--radius-sm);
  }

  .page-topics .topic--s5 {
    --topic-span: span 5;
    --topic-radius: var(--radius-sm);
  }

  .page-topics .topic--s7 {
    --topic-span: span 7;
    --topic-radius: var(--radius-md);
  }

  .page-topics .topic--s8 {
    --topic-span: span 8;
    --topic-radius: var(--radius-md);
  }

  .page-topics .topic--s12 {
    --topic-span: span 12;
    --topic-radius: var(--radius-lg);
  }

  .page-topics .topic--s4 .topic__title,
  .page-topics .topic--s5 .topic__title {
    font-size: var(--text-lg);
  }

  .page-topics .topic--s12 .topic__title {
    font-size: var(--text-2xl);
  }

  .page-topics .topic--lead {
    display: grid;
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.18fr);
    align-items: start;
    gap: var(--space-3) var(--space-4);
  }

  .page-topics .topic--lead .topic__media {
    aspect-ratio: 4 / 3;
    height: 100%;
  }
}

/* ---------- 赛季轴 ---------- */
.page-topics .axis {
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-topics .axis__bar {
  display: flex;
  gap: var(--space-1);
  overflow-x: auto;
  padding-bottom: var(--space-2);
  scrollbar-width: thin;
}

.page-topics .axis__btn {
  flex: 0 0 auto;
  min-width: calc(var(--space-8) + var(--space-2));
  padding: var(--space-1) var(--space-2);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--color-ink-soft);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
  cursor: pointer;
  transition: color 160ms var(--ease-out), background-color 160ms var(--ease-out), border-color 160ms var(--ease-out);
}

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

.page-topics .axis__btn[aria-selected="true"] {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-primary-ink);
}

.page-topics .axis__btn[aria-selected="true"]:hover {
  color: var(--color-primary-ink);
}

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

.page-topics .axis__panel {
  padding-top: var(--space-3);
}

.page-topics .axis__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-topics .axis__item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-2) 0;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-topics .axis__link {
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-primary);
  text-decoration: none;
}

.page-topics .axis__link:hover {
  color: var(--color-accent);
}

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

.page-topics .axis__desc {
  font-size: var(--text-sm);
  line-height: 1.72;
  color: var(--color-ink-soft);
}

@media (min-width: 768px) {
  .page-topics .axis__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-3);
  }

  .page-topics .axis__item {
    padding: var(--space-2) var(--space-2) var(--space-2) 0;
    border-top: var(--border-thin) solid var(--color-line);
  }
}

/* ---------- 更新与归档 ---------- */
.page-topics .cycle {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
}

.page-topics .cycle__intro h2 {
  margin: var(--space-2) 0 var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-surface);
}

.page-topics .cycle__lead {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-topics .cycle__list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-topics .cycle__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-topics .cycle__num {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: var(--color-accent);
  font-variant-numeric: tabular-nums;
}

.page-topics .cycle__body h3 {
  margin: 0 0 var(--space-1);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-surface);
}

.page-topics .cycle__body p {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

@media (min-width: 1024px) {
  .page-topics .cycle {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: var(--space-6);
    align-items: start;
  }

  .page-topics .cycle__intro {
    position: sticky;
    top: calc(var(--topbar-h) + var(--space-4));
  }
}

/* ---------- 勘误入口 ---------- */
.page-topics .fix {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  padding: var(--space-4);
  background-image: radial-gradient(
    circle at 10% 14%,
    color-mix(in srgb, var(--color-primary-soft) 86%, transparent),
    transparent 64%
  );
}

.page-topics .fix__text h2 {
  margin: var(--space-2) 0 var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-surface);
}

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

.page-topics .fix__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

@media (min-width: 768px) {
  .page-topics .fix {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    padding: var(--space-6);
  }
}