.page-topics {
  --topics-hairline: color-mix(in srgb, var(--color-line) 88%, transparent);
  --topics-glass: color-mix(in srgb, var(--color-surface-alt) 74%, transparent);
}

/* ---------- 首屏 ---------- */

.page-topics .topics-hero {
  padding-block-start: var(--space-4);
  padding-block-end: var(--space-6);
}

.page-topics .topics-hero__grid {
  display: grid;
  gap: var(--space-4);
  margin-block-start: var(--space-4);
}

.page-topics .topics-hero__title {
  margin: var(--space-1) 0 0;
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

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

.page-topics .topics-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-2);
  margin: 0;
  padding: var(--space-3);
  border: var(--border-thin) solid var(--topics-hairline);
  border-radius: var(--radius-md);
  background: var(--topics-glass);
  box-shadow: var(--shadow-1);
}

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

.page-topics .topics-stat__label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}

.page-topics .topics-stat__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
}

.page-topics .topics-stat:nth-child(1) .topics-stat__value {
  color: var(--color-primary);
}

.page-topics .topics-stat:nth-child(2) .topics-stat__value {
  color: var(--color-accent);
}

.page-topics .topics-stat:nth-child(3) .topics-stat__value {
  color: color-mix(in srgb, var(--color-primary) 52%, var(--color-accent));
}

/* ---------- 编号带 ---------- */

.page-topics .topics-band {
  position: relative;
  margin-block-start: var(--space-6);
  border: var(--border-thin) solid var(--topics-hairline);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-2);
}

.page-topics .topics-band__media {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

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

.page-topics .topics-band__scrim {
  position: absolute;
  inset: 0;
  background: var(--overlay-scrim);
}

.page-topics .topics-band__track {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin: 0;
  padding: var(--space-8) var(--space-3);
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-topics .topics-band__num {
  flex: 0 0 auto;
  scroll-snap-align: start;
  padding: var(--space-1) var(--space-2);
  border: var(--border-thin) solid color-mix(in srgb, var(--color-contrast-ink) 34%, transparent);
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--color-contrast-surface) 46%, transparent);
  color: var(--color-contrast-ink);
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: 600;
  letter-spacing: 0.04em;
  backdrop-filter: blur(6px);
}

.page-topics .topics-band__num:nth-child(odd) {
  border-color: color-mix(in srgb, var(--color-primary-soft) 62%, transparent);
  color: color-mix(in srgb, var(--color-primary-soft) 82%, var(--color-contrast-ink));
}

.page-topics .topics-band__num:nth-child(even) {
  border-color: color-mix(in srgb, var(--color-contrast-accent) 72%, transparent);
  color: color-mix(in srgb, var(--color-contrast-accent) 82%, var(--color-contrast-ink));
}

/* ---------- 六类标签色块 ---------- */

.page-topics .topics-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin: var(--space-3) 0 0;
  padding: 0;
  list-style: none;
}

.page-topics .topics-chip {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-ink);
  background: var(--color-surface);
  transition: background-color 0.18s ease, border-color 0.18s ease;
}

.page-topics .topics-chip--archive {
  background: color-mix(in srgb, var(--color-primary) 15%, var(--color-surface));
  border-color: color-mix(in srgb, var(--color-primary) 34%, transparent);
}

.page-topics .topics-chip--referee {
  background: color-mix(in srgb, var(--color-accent) 17%, var(--color-surface));
  border-color: color-mix(in srgb, var(--color-accent) 38%, transparent);
}

.page-topics .topics-chip--foreign {
  background: color-mix(in srgb, var(--color-highlight) 66%, var(--color-surface));
  border-color: color-mix(in srgb, var(--color-accent) 28%, transparent);
}

.page-topics .topics-chip--coach {
  background: color-mix(in srgb, var(--color-primary-soft) 60%, var(--color-surface));
  border-color: color-mix(in srgb, var(--color-primary) 26%, transparent);
}

.page-topics .topics-chip--player {
  background: color-mix(in srgb, var(--color-surface-deep) 74%, var(--color-surface));
  border-color: var(--color-line);
}

.page-topics .topics-chip--table {
  background: color-mix(in srgb, var(--color-accent) 9%, var(--color-surface));
  border-color: color-mix(in srgb, var(--color-accent) 22%, transparent);
}

.page-topics .topics-chip:hover {
  background: var(--color-highlight);
  border-color: color-mix(in srgb, var(--color-accent) 44%, transparent);
}

/* ---------- 目录区 ---------- */

.page-topics .topics-catalog {
  padding-block: var(--space-6);
}

.page-topics .topics-catalog__head {
  max-width: var(--measure);
  margin-block-end: var(--space-4);
}

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

.page-topics .topics-catalog__note {
  margin: var(--space-2) 0 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-topics .tab-list {
  display: flex;
  gap: var(--space-1);
  padding-block-end: var(--space-1);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-topics .tab {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background: color-mix(in srgb, var(--color-surface-alt) 84%, transparent);
  color: var(--color-ink-soft);
  font: inherit;
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.page-topics .tab__count {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.page-topics .tab:hover {
  background: var(--color-highlight);
  color: var(--color-ink);
}

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

.page-topics .tab[aria-selected="true"] .tab__count {
  color: color-mix(in srgb, var(--color-primary-ink) 78%, transparent);
}

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

.page-topics .topic-panel {
  margin-block-start: var(--space-4);
  padding-block-start: var(--space-3);
  border-top: var(--border-thin) solid var(--topics-hairline);
}

.page-topics .topic-panel + .topic-panel {
  margin-block-start: var(--space-6);
}

.page-topics .topic-panel__title {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.page-topics .topic-panel__media {
  margin: 0 0 var(--space-3);
  border: var(--border-thin) solid var(--topics-hairline);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

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

/* ---------- 专题条目 ---------- */

.page-topics .topic-entry {
  display: grid;
  gap: var(--space-2);
  padding-block: var(--space-4);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-topics .topic-entry:first-of-type {
  border-top: none;
}

.page-topics .topic-entry__num {
  font-family: var(--font-mono);
  font-size: var(--text-4xl);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--color-primary);
}

.page-topics .topic-entry:nth-of-type(even) .topic-entry__num {
  color: var(--color-accent);
}

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

.page-topics .topic-entry__lead {
  margin: var(--space-2) 0 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

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

.page-topics .topic-entry__reach {
  font-size: var(--text-sm);
  font-family: var(--font-mono);
  color: var(--color-ink-muted);
}

.page-topics .topic-entry__more {
  margin-block-start: var(--space-2);
}

.page-topics .topic-entry__more .acc-trigger {
  padding-block: var(--space-1);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-accent);
  cursor: pointer;
}

.page-topics .topic-entry__more .acc-panel {
  padding-block: var(--space-2) var(--space-1);
}

.page-topics .topic-entry__facts {
  display: grid;
  gap: var(--space-2);
  margin: 0;
}

.page-topics .topic-entry__facts > div {
  display: grid;
  gap: var(--space-1);
}

.page-topics .topic-entry__facts dt {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}

.page-topics .topic-entry__facts dd {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

/* ---------- 规则区 ---------- */

.page-topics .topics-rules {
  padding-block: var(--space-6);
}

.page-topics .topics-plate {
  margin: 0 0 var(--space-6);
  border: var(--border-thin) solid var(--topics-hairline);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-topics .topics-plate img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 8;
  object-fit: cover;
}

.page-topics .topics-plate .media-frame__caption {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--color-ink-muted);
  background: var(--color-surface-alt);
}

.page-topics .topics-rules-layout {
  display: grid;
  gap: var(--space-6);
}

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

.page-topics .topics-rules__list {
  margin: var(--space-4) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: var(--space-3);
}

.page-topics .topics-rule {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-2);
  padding-block-start: var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-topics .topics-rule__num {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: 700;
  line-height: var(--leading-heading);
  color: var(--color-accent);
}

.page-topics .topics-rule__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-topics .topics-rule__text {
  margin: var(--space-1) 0 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

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

.page-topics .topics-rules__cross a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 0.22em;
}

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

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

/* ---------- 索引入口面板 ---------- */

.page-topics .topics-index-cta {
  display: grid;
  gap: var(--space-2);
  align-content: start;
}

.page-topics .topics-index-cta__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-primary);
}

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

.page-topics .topics-index-cta__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: var(--space-2);
}

.page-topics .topics-index-cta__list li {
  padding-inline-start: var(--space-3);
  border-inline-start: 2px solid color-mix(in srgb, var(--color-primary) 42%, transparent);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-topics .topics-index-cta .btn {
  justify-self: start;
  margin-block-start: var(--space-1);
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-topics .topic-entry {
    grid-template-columns: auto minmax(0, 1fr);
    gap: var(--space-4);
    align-items: start;
  }

  .page-topics .topic-entry__num {
    min-width: 2.6em;
  }

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

@media (min-width: 960px) {
  .page-topics .topics-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: var(--space-6);
    align-items: end;
  }

  .page-topics .topics-band__track {
    gap: var(--space-3);
    padding-inline: var(--space-6);
  }

  .page-topics .topic-panel {
    padding-block-start: var(--space-4);
  }

  .page-topics .topics-rules-layout {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: var(--space-8);
    align-items: start;
  }
}

@media (min-width: 1180px) {
  .page-topics .topics-hero__stats {
    padding: var(--space-4);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-topics .topics-chip,
  .page-topics .tab {
    transition: none;
  }
}