.page-topics {
  --topics-skew: 14px;
  --topics-tile-high: 132px;
  --topics-tile-low: 76px;
  background: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  overflow-x: hidden;
}

.page-topics .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: var(--weight-heading);
}

/* ---------- 首屏 ---------- */

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

.page-topics .topics-hero .breadcrumb {
  color: var(--color-contrast-ink);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  margin-bottom: var(--space-6);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  opacity: 0.72;
}

.page-topics .topics-hero .breadcrumb a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px dashed var(--color-contrast-line);
}

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

.page-topics .topics-hero .eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: var(--color-contrast-accent);
  margin: 0 0 var(--space-3);
}

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

.page-topics .topics-hero__title {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-display);
  line-height: 0.9;
  letter-spacing: var(--tracking-heading);
  margin: 0;
  color: var(--color-contrast-ink);
  word-break: break-word;
}

.page-topics .topics-hero__lead {
  margin: var(--space-4) 0 0;
  max-width: 46ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.86;
}

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

.page-topics .topics-figure {
  border-left: 1px dashed var(--color-contrast-line);
  padding-left: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  min-width: 0;
}

.page-topics .topics-figure__num {
  font-size: var(--text-figure);
  line-height: 1;
  color: var(--color-contrast-accent);
}

.page-topics .topics-figure__label {
  font-size: var(--text-sm);
  line-height: 1.4;
  color: var(--color-contrast-ink);
  opacity: 0.78;
}

.page-topics .topics-hero__tiles {
  margin-top: var(--space-8);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-1);
}

.page-topics .topics-tile {
  position: relative;
  display: flex;
  align-items: flex-end;
  min-height: var(--topics-tile-low);
  padding: var(--space-2);
  background: color-mix(in srgb, var(--color-primary) 20%, var(--color-contrast-surface));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--topics-skew)), calc(100% - var(--topics-skew)) 100%, 0 100%);
}

.page-topics .topics-tile:nth-child(2),
.page-topics .topics-tile:nth-child(3),
.page-topics .topics-tile:nth-child(6) {
  background: color-mix(in srgb, var(--color-primary) 38%, var(--color-contrast-surface));
}

.page-topics .topics-tile:nth-child(4) {
  background: var(--color-primary);
}

.page-topics .topics-tile:nth-child(5) {
  background: var(--color-accent);
}

.page-topics .topics-tile__no {
  font-size: var(--text-lg);
  line-height: 1;
  color: var(--color-primary-ink);
}

.page-topics .topics-tile:nth-child(5) .topics-tile__no {
  color: var(--color-accent-ink);
}

/* ---------- 筛选与赛道 ---------- */

.page-topics .topics-stream .section-head {
  border-left: 3px solid var(--color-primary);
  padding-left: var(--space-4);
  margin-bottom: var(--space-6);
}

.page-topics .topics-stream .filter-bar {
  margin-bottom: var(--space-6);
}

.page-topics .filter-btn[aria-pressed="true"] {
  border-bottom-color: var(--color-primary);
}

.page-topics .topic-track {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-3);
  padding-block: var(--space-6);
  border-top: 1px dashed var(--color-line);
  overflow: hidden;
}

.page-topics .topic-track:last-of-type {
  border-bottom: 1px dashed var(--color-line);
}

.page-topics .topic-track__aside {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
}

.page-topics .topic-track__no {
  font-size: var(--text-2xl);
  line-height: 1;
  color: var(--color-primary);
}

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

.page-topics .topic-track__value {
  margin: 0 0 var(--space-3);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  max-width: 58ch;
  color: var(--color-ink);
}

.page-topics .topic-track__meta {
  margin: 0;
}

.page-topics .topic-track__meta > div {
  display: grid;
  grid-template-columns: 4.5em minmax(0, 1fr);
  gap: var(--space-2);
  padding-block: var(--space-1);
  border-top: 1px dashed var(--color-line);
}

.page-topics .topic-track__meta dt {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
  padding-top: 0.35em;
}

.page-topics .topic-track__meta dd {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink-soft);
}

.page-topics .topic-track__link {
  margin: var(--space-3) 0 0;
}

.page-topics .topic-track__link a {
  display: inline-block;
  font-size: var(--text-sm);
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 2px solid var(--color-primary-soft);
  padding-bottom: 2px;
}

.page-topics .topic-track__link a:hover,
.page-topics .topic-track__link a:focus-visible {
  border-bottom-color: var(--color-primary);
}

/* 带背景图的赛道 */

.page-topics .topic-track--media {
  color: var(--color-contrast-ink);
  border-top-color: transparent;
  padding-inline: var(--space-4);
  align-items: end;
}

.page-topics .topic-track__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: cover;
}

.page-topics .topic-track__scrim {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: var(--overlay-scrim);
}

.page-topics .topic-track--media > .topic-track__aside,
.page-topics .topic-track--media > .topic-track__body {
  position: relative;
  z-index: 2;
}

.page-topics .topic-track--media .topic-track__no {
  color: var(--color-contrast-accent);
}

.page-topics .topic-track--media .topic-track__name,
.page-topics .topic-track--media .topic-track__value {
  color: var(--color-contrast-ink);
}

.page-topics .topic-track--media .topic-track__meta > div {
  border-top-color: var(--color-contrast-line);
}

.page-topics .topic-track--media .topic-track__meta dt {
  color: var(--color-contrast-ink);
  opacity: 0.7;
}

.page-topics .topic-track--media .topic-track__meta dd {
  color: var(--color-contrast-ink);
  opacity: 0.88;
}

.page-topics .topic-track--media .topic-track__link a {
  color: var(--color-contrast-accent);
  border-bottom-color: color-mix(in srgb, var(--color-contrast-accent) 40%, transparent);
}

.page-topics .topic-track--media .topic-track__link a:hover,
.page-topics .topic-track--media .topic-track__link a:focus-visible {
  border-bottom-color: var(--color-contrast-accent);
}

.page-topics .filter-empty {
  margin: var(--space-4) 0 0;
  padding: var(--space-3);
  border: 1px dashed var(--color-line);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

/* ---------- 奖项聚合 ---------- */

.page-topics .topics-awards .section-title {
  max-width: 22ch;
}

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

.page-topics .topics-split__note {
  border: 1px dashed var(--color-line);
  padding: var(--space-4);
  background: var(--color-surface);
  align-self: start;
}

.page-topics .topics-note__label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
  margin: 0 0 var(--space-3);
}

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

.page-topics .topics-note__list li {
  display: grid;
  grid-template-columns: 2ch minmax(0, 1fr);
  gap: var(--space-2);
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink-soft);
  padding-bottom: var(--space-3);
  border-bottom: 1px dashed var(--color-line);
}

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

.page-topics .topics-note__list .num {
  color: var(--color-accent);
  font-size: var(--text-sm);
}

/* ---------- 联动时间线 ---------- */

.page-topics .topics-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  border-top: 1px dashed var(--color-line);
}

.page-topics .topics-step {
  display: grid;
  grid-template-columns: 4.5ch minmax(0, 1fr);
  gap: var(--space-3);
  padding-block: var(--space-4);
  border-bottom: 1px dashed var(--color-line);
}

.page-topics .topics-step__no {
  font-size: var(--text-lg);
  line-height: 1.1;
  color: var(--color-primary);
}

.page-topics .topics-step__title {
  grid-column: 2;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-base);
  margin: 0 0 var(--space-1);
  color: var(--color-ink);
}

.page-topics .topics-step__text {
  grid-column: 2;
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-soft);
  max-width: 62ch;
}

/* ---------- 更新节奏 ---------- */

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

.page-topics .rhythm-card {
  border-left: 3px solid var(--color-accent);
  background: var(--color-surface);
  padding: var(--space-3) var(--space-4);
}

.page-topics .rhythm-card--wide {
  border-left-color: var(--color-primary);
}

.page-topics .rhythm-card__phase {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
  margin: 0 0 var(--space-2);
}

.page-topics .rhythm-card__body {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink);
}

/* ---------- 出口 ---------- */

.page-topics .topics-exits .section-head {
  border-left: 3px solid var(--color-contrast-accent);
  padding-left: var(--space-4);
  margin-bottom: var(--space-6);
}

.page-topics .topics-exits .eyebrow {
  color: var(--color-contrast-accent);
}

.page-topics .topics-exits .section-title {
  color: var(--color-contrast-ink);
}

.page-topics .topics-exits .section-lead {
  color: var(--color-contrast-ink);
  opacity: 0.82;
}

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

.page-topics .topics-exit__link {
  display: grid;
  grid-template-columns: 4ch minmax(0, 1fr);
  gap: var(--space-2) var(--space-3);
  align-items: start;
  padding: var(--space-3) var(--space-3) var(--space-3) 0;
  border-top: 1px dashed var(--color-contrast-line);
  text-decoration: none;
  color: var(--color-contrast-ink);
  transition: transform 180ms ease, border-top-color 180ms ease;
}

.page-topics .topics-exit__link:hover,
.page-topics .topics-exit__link:focus-visible {
  border-top-color: var(--color-contrast-accent);
  transform: translateX(2px);
}

.page-topics .topics-exit__no {
  grid-row: span 2;
  font-size: var(--text-base);
  color: var(--color-contrast-accent);
  padding-top: 0.25em;
}

.page-topics .topics-exit__title {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
}

.page-topics .topics-exit__desc {
  font-size: var(--text-sm);
  line-height: 1.65;
  color: var(--color-contrast-ink);
  opacity: 0.8;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-topics .topics-hero__figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-topics .topics-hero__tiles {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-topics .topics-tile:nth-child(1),
  .page-topics .topics-tile:nth-child(4) {
    grid-column: span 4;
  }

  .page-topics .topics-tile:nth-child(2),
  .page-topics .topics-tile:nth-child(3) {
    grid-column: span 2;
  }

  .page-topics .topics-tile:nth-child(5),
  .page-topics .topics-tile:nth-child(6) {
    grid-column: span 3;
  }

  .page-topics .topics-tile:nth-child(4),
  .page-topics .topics-tile:nth-child(5),
  .page-topics .topics-tile:nth-child(6) {
    min-height: var(--topics-tile-high);
  }

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

  .page-topics .rhythm-card--wide {
    grid-column: span 2;
  }

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

@media (min-width: 880px) {
  .page-topics .topics-hero {
    padding-block: var(--space-8) var(--section-y-lg);
  }

  .page-topics .topics-hero__grid {
    grid-template-columns: repeat(7, minmax(0, 1fr));
    gap: var(--gutter);
    align-items: end;
  }

  .page-topics .topics-hero__main {
    grid-column: 1 / span 4;
  }

  .page-topics .topics-hero__figures {
    grid-column: 5 / span 3;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-3);
  }

  .page-topics .topic-track {
    grid-template-columns: minmax(0, 2fr) minmax(0, 5fr);
    gap: var(--space-6);
    padding-block: var(--space-8);
    align-items: start;
  }

  .page-topics .topic-track--media {
    align-items: end;
    padding-inline: var(--space-6);
  }

  .page-topics .topic-track__aside {
    display: block;
  }

  .page-topics .topic-track__no {
    display: block;
    margin-bottom: var(--space-2);
  }

  .page-topics .topic-track:not(.topic-track--media) .topic-track__aside {
    position: sticky;
    top: var(--space-6);
    align-self: start;
  }

  .page-topics .topics-split {
    grid-template-columns: minmax(0, 5fr) minmax(0, 2fr);
    gap: var(--space-8);
  }

  .page-topics .topics-timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    border-top: 0;
    gap: var(--space-4);
  }

  .page-topics .topics-step {
    grid-template-columns: minmax(0, 1fr);
    border-bottom: 0;
    border-top: 1px dashed var(--color-line);
    padding-block: var(--space-4);
    gap: var(--space-2);
  }

  .page-topics .topics-step__title,
  .page-topics .topics-step__text {
    grid-column: 1;
  }

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

  .page-topics .rhythm-card--wide {
    grid-column: span 2;
  }

  .page-topics .topics-exits__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-4) var(--space-8);
  }
}

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

  .page-topics .topics-exit__link:hover,
  .page-topics .topics-exit__link:focus-visible {
    transform: none;
  }
}
<<<END>>>