.page-topics {
  --cat-accent: var(--color-primary);
}

/* ---------- 首屏 ---------- */
.page-topics .topics-hero {
  padding-block: var(--space-6) var(--space-8);
}

.page-topics .topics-hero__title {
  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);
  margin: var(--space-3) 0 var(--space-3);
  max-width: 16ch;
}

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

/* 深色数字条 */
.page-topics .topics-tally {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin-top: var(--space-6);
  padding: var(--space-4) var(--space-3);
  border-radius: var(--radius-lg);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  box-shadow: var(--shadow-2);
}

.page-topics .tally-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: var(--space-3) 0;
}

.page-topics .tally-item + .tally-item {
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

.page-topics .tally-num {
  font-family: var(--font-mono);
  color: var(--color-contrast-accent);
  line-height: 1;
  font-weight: 600;
}

.page-topics .tally-label {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  color: var(--color-contrast-ink);
}

.page-topics .tally-note {
  color: color-mix(in srgb, var(--color-contrast-ink) 62%, transparent);
}

/* 分类色标带 */
.page-topics .topics-rail {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.page-topics .rail-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--cat-accent) 10%, var(--color-surface));
  color: var(--color-ink);
  text-decoration: none;
  font-size: var(--text-sm);
  min-width: 0;
  transition: background-color 220ms ease, color 220ms ease;
}

.page-topics .rail-link:hover {
  background: color-mix(in srgb, var(--cat-accent) 22%, var(--color-surface));
}

.page-topics .rail-link--promotion { --cat-accent: var(--color-primary); }
.page-topics .rail-link--injury { --cat-accent: var(--color-accent); }
.page-topics .rail-link--friendly { --cat-accent: color-mix(in srgb, var(--color-accent) 55%, var(--color-primary)); }
.page-topics .rail-link--version { --cat-accent: var(--color-contrast-surface); }

.page-topics .rail-dot {
  flex: none;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cat-accent);
}

.page-topics .rail-label {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.page-topics .rail-count {
  margin-left: auto;
  color: var(--color-ink-muted);
  font-size: var(--text-xs);
}

.page-topics .topics-hero__figure {
  margin: var(--space-6) 0 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-topics .topics-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-md);
}

/* ---------- 分类区块 ---------- */
.page-topics .cat-section {
  padding-block: var(--space-8);
}

.page-topics .cat-section--promotion { --cat-accent: var(--color-primary); }
.page-topics .cat-section--injury { --cat-accent: var(--color-accent); }
.page-topics .cat-section--friendly { --cat-accent: color-mix(in srgb, var(--color-accent) 55%, var(--color-primary)); }
.page-topics .cat-section--version { --cat-accent: var(--color-contrast-surface); }

.page-topics .cat-head {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.page-topics .cat-intro-col .section-eyebrow {
  color: var(--cat-accent);
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
}

.page-topics .cat-intro {
  max-width: 46ch;
  font-size: var(--text-base);
  color: var(--color-ink-soft);
  margin: var(--space-2) 0 0;
}

.page-topics .cat-figure {
  margin: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-topics .cat-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

/* ---------- 条目 ---------- */
.page-topics .topic-list {
  display: grid;
  gap: var(--space-1);
}

.page-topics .topic-entry {
  display: grid;
  grid-template-columns: 2rem 3px minmax(0, 1fr);
  gap: var(--space-2);
  padding: var(--space-3) var(--space-2);
  border-radius: var(--radius-md);
  transition: background-color 200ms ease;
}

.page-topics .topic-entry:hover {
  background: color-mix(in srgb, var(--cat-accent) 9%, transparent);
}

.page-topics .topic-num {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: 0.02em;
  color: var(--cat-accent);
}

.page-topics .topic-rule {
  display: block;
  width: 3px;
  border-radius: var(--radius-pill);
  background: var(--cat-accent);
  opacity: 0.9;
}

.page-topics .topic-body {
  min-width: 0;
}

.page-topics .topic-title {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
  margin: var(--space-1) 0 var(--space-1);
}

.page-topics .topic-desc {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: 1.72;
  color: var(--color-ink-soft);
}

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

/* 状态三档 */
.page-topics .topic-status {
  display: inline-flex;
  align-items: center;
  padding: 3px 12px;
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.page-topics .topic-status--live {
  background: color-mix(in srgb, var(--color-primary) 16%, transparent);
  color: var(--color-primary);
}

.page-topics .topic-status--cycle {
  background: color-mix(in srgb, var(--color-accent) 18%, transparent);
  color: color-mix(in srgb, var(--color-accent) 82%, var(--color-ink));
}

.page-topics .topic-status--archived {
  background: color-mix(in srgb, var(--color-ink-muted) 16%, transparent);
  color: var(--color-ink-muted);
}

/* 展开控件 */
.page-topics .entry-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 4px 10px 4px 12px;
  border: 0;
  border-radius: var(--radius-pill);
  background: color-mix(in srgb, var(--cat-accent) 12%, transparent);
  color: var(--color-ink-soft);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  cursor: pointer;
  transition: background-color 200ms ease, color 200ms ease;
}

.page-topics .entry-toggle:hover {
  background: color-mix(in srgb, var(--cat-accent) 24%, transparent);
  color: var(--color-ink);
}

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

.page-topics .entry-toggle-mark {
  width: 7px;
  height: 7px;
  margin-top: -3px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg);
  transition: transform 220ms ease;
}

.page-topics .entry-toggle[aria-expanded="true"] .entry-toggle-mark {
  margin-top: 3px;
  transform: rotate(225deg);
}

.page-topics .topic-detail {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 240ms ease, opacity 200ms ease;
}

.page-topics .topic-detail[data-open] {
  max-height: 340px;
  opacity: 1;
}

.page-topics .topic-detail .expand-inner {
  padding-top: var(--space-2);
}

.page-topics .detail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 4px;
}

.page-topics .detail-list li {
  display: flex;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.page-topics .detail-list li::before {
  content: "—";
  color: var(--cat-accent);
  flex: none;
}

/* ---------- 状态说明 ---------- */
.page-topics .topics-status {
  padding-block: var(--space-8);
}

.page-topics .status-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

.page-topics .status-legend {
  margin: 0;
  display: grid;
  gap: var(--space-3);
}

.page-topics .legend-row {
  display: grid;
  gap: var(--space-1);
  padding-left: var(--space-3);
  border-left: 3px solid var(--color-primary);
}

.page-topics .legend-row dt {
  margin: 0;
}

.page-topics .legend-row dd {
  margin: 0;
  font-size: var(--text-base);
  line-height: 1.72;
  color: var(--color-ink-soft);
  max-width: 62ch;
}

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

.page-topics .status-note a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-topics .status-note a:hover {
  color: color-mix(in srgb, var(--color-primary) 78%, var(--color-ink));
}

/* ---------- 收尾 ---------- */
.page-topics .topics-outro {
  padding-block: var(--space-8);
}

.page-topics .topics-outro__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

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

  .page-topics .topics-tally {
    padding: var(--space-6) var(--space-4);
  }
}

@media (min-width: 760px) {
  .page-topics .topics-rail {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--space-1);
  }

  .page-topics .status-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: var(--space-6);
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-topics .topics-hero {
    padding-block: var(--space-8) var(--section-y);
  }

  .page-topics .topics-tally {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    padding: var(--space-6) var(--space-6);
  }

  .page-topics .tally-item + .tally-item {
    border-top: 0;
    border-left: var(--border-thin) solid var(--color-contrast-line);
    padding-left: var(--space-6);
  }

  .page-topics .cat-section {
    padding-block: var(--section-y);
  }

  .page-topics .cat-head {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-6);
    align-items: center;
  }

  .page-topics .cat-head--flip {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-topics .cat-head--flip .cat-intro-col {
    order: 2;
  }

  .page-topics .cat-head--flip .cat-figure {
    order: 1;
  }

  .page-topics .topic-entry {
    grid-template-columns: 3.5rem 3px minmax(0, 1fr);
    gap: var(--space-4);
    padding: var(--space-4);
  }

  .page-topics .topics-status,
  .page-topics .topics-outro {
    padding-block: var(--section-y);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-topics .topic-entry,
  .page-topics .rail-link,
  .page-topics .entry-toggle,
  .page-topics .entry-toggle-mark,
  .page-topics .topic-detail {
    transition: none;
  }
}