.page-topics {
  --topics-rule-gap: var(--space-6);
  --topics-card-pad: var(--space-3);
}

/* ============ 首屏 ============ */
.page-topics .topics-hero {
  padding-top: var(--space-4);
  padding-bottom: 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: 0.94;
  letter-spacing: -0.035em;
  color: var(--color-ink);
  margin: var(--space-3) 0 0;
  max-width: 12ch;
  overflow-wrap: anywhere;
}

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

.page-topics .topics-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4) var(--space-3);
  margin-top: var(--space-8);
  padding-top: var(--space-4);
  border-top: var(--border-thin) solid var(--color-line);
}

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

.page-topics .topics-stat-num {
  font-family: var(--font-heading);
  font-size: var(--text-figure);
  font-weight: var(--weight-heading);
  line-height: 0.86;
  letter-spacing: -0.045em;
  color: var(--color-ink);
  font-variant-numeric: tabular-nums;
}

.page-topics .topics-stat--key .topics-stat-num {
  color: var(--color-primary);
}

.page-topics .topics-stat-label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-ink);
  line-height: 1.3;
}

.page-topics .topics-stat-note {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  line-height: 1.4;
}

/* ============ 分组区 ============ */
.page-topics .topics-group-grid {
  display: grid;
  gap: var(--space-8);
  margin-top: var(--space-6);
}

.page-topics .topic-group {
  position: relative;
  padding-top: var(--space-3);
}

.page-topics .topic-group::before {
  content: "";
  display: block;
  height: 8px;
  margin-bottom: var(--space-3);
  background-image: repeating-linear-gradient(
    to right,
    var(--color-line) 0 1px,
    transparent 1px 12px
  );
}

.page-topics .topic-group-head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-3);
  margin-bottom: var(--space-4);
}

.page-topics .topic-group-num {
  font-family: var(--font-heading);
  font-size: var(--text-4xl);
  font-weight: var(--weight-heading);
  line-height: 0.82;
  letter-spacing: -0.05em;
  color: var(--color-ink);
  font-variant-numeric: tabular-nums;
}

.page-topics .topic-group-title {
  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-ink);
  margin: 0;
}

.page-topics .topic-group-meta {
  margin-left: auto;
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
  white-space: nowrap;
}

.page-topics .topic-group-cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
}

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

.page-topics .topic-group-points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
  max-width: var(--measure);
}

.page-topics .topic-group-points li {
  position: relative;
  padding-left: var(--space-3);
  font-size: var(--text-sm);
  line-height: 1.65;
  color: var(--color-ink-soft);
}

.page-topics .topic-group-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 2px;
  background: var(--color-primary);
}

.page-topics .topic-group-figure {
  margin: var(--space-4) 0 0;
}

/* ============ 专题条目 ============ */
.page-topics .topic-entries {
  display: grid;
  gap: var(--space-3);
  align-content: start;
}

.page-topics .topic-entry {
  background: var(--color-surface-alt);
  padding: var(--topics-card-pad);
  display: grid;
  gap: var(--space-2);
  min-width: 0;
}

.page-topics .topic-entry-name {
  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-ink);
  margin: 0;
}

.page-topics .topic-entry-fields {
  display: grid;
  gap: var(--space-1);
  margin: 0;
}

.page-topics .topic-entry-field {
  display: grid;
  grid-template-columns: 5.2em minmax(0, 1fr);
  gap: var(--space-2);
  padding-top: var(--space-1);
  border-top: var(--border-thin) solid var(--color-line);
  font-size: var(--text-sm);
  line-height: 1.5;
}

.page-topics .topic-entry-field:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-topics .topic-entry-field dt {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  letter-spacing: 0.04em;
}

.page-topics .topic-entry-field dd {
  margin: 0;
  color: var(--color-ink);
  min-width: 0;
}

.page-topics .topic-entry-link {
  justify-self: start;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-ink);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-ink-muted);
  padding-bottom: 2px;
  transition: color 180ms ease, border-color 180ms ease;
}

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

/* ============ 索引怎么组织 ============ */
.page-topics .topics-index-cols {
  align-items: start;
  gap: var(--space-4);
}

.page-topics .topics-index-figure {
  margin: 0;
}

/* ============ 延伸入口 ============ */
.page-topics .topics-more-grid {
  align-items: start;
  gap: var(--space-4);
}

.page-topics .topics-more-card {
  display: grid;
  gap: var(--space-2);
  padding: var(--topics-card-pad);
  background: var(--color-surface-alt);
  border-top: var(--border-thick) solid var(--color-line);
  text-decoration: none;
  color: inherit;
  transition: border-color 180ms ease, background-color 180ms ease;
  min-width: 0;
}

.page-topics .topics-more-card:hover,
.page-topics .topics-more-card:focus-visible {
  border-top-color: var(--color-primary);
  background: var(--color-primary-soft);
}

.page-topics .topics-more-kicker {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

.page-topics .topics-more-title {
  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-ink);
}

.page-topics .topics-more-text {
  font-size: var(--text-sm);
  line-height: 1.65;
  color: var(--color-ink-soft);
}

/* ============ 收束区块 ============ */
.page-topics .topics-outro .shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  align-items: start;
}

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

.page-topics .topics-outro-line {
  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-ink);
  margin: 0;
  max-width: 20ch;
}

.page-topics .topics-outro-contact {
  font-size: var(--text-sm);
  line-height: 1.65;
  color: var(--color-contrast-ink);
  margin: var(--space-3) 0 0;
  overflow-wrap: anywhere;
}

.page-topics .topics-outro-actions {
  margin: var(--space-4) 0 0;
}

.page-topics .topics-outro-figure {
  margin: 0;
}

.page-topics .topics-outro-figure .figure-caption {
  color: var(--color-contrast-ink);
}

/* ============ 图片通用 ============ */
.page-topics .figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-topics .grid > * {
  min-width: 0;
}

/* ============ 响应式 ============ */
@media (max-width: 719px) {
  .page-topics .grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-topics .span-3,
  .page-topics .span-4,
  .page-topics .span-5,
  .page-topics .span-6,
  .page-topics .span-7,
  .page-topics .span-8,
  .page-topics .span-9,
  .page-topics .span-12 {
    grid-column: 1 / -1;
  }

  .page-topics .topic-group-num {
    font-size: var(--text-3xl);
  }

  .page-topics .topic-group-meta {
    margin-left: 0;
  }

  .page-topics .topics-outro-line {
    max-width: none;
  }
}

@media (min-width: 720px) {
  .page-topics .topics-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-topics .topics-outro .shell {
    grid-template-columns: 7fr 5fr;
    gap: var(--space-8);
  }
}

@media (min-width: 900px) {
  .page-topics .topic-group-cols {
    gap: var(--space-6);
  }

  .page-topics .topic-group--a .topic-group-cols {
    grid-template-columns: 7fr 5fr;
  }

  .page-topics .topic-group--b .topic-group-cols {
    grid-template-columns: 5fr 7fr;
  }

  .page-topics .topic-group--c .topic-group-cols {
    grid-template-columns: 4fr 8fr;
  }

  .page-topics .topic-group--d .topic-group-cols {
    grid-template-columns: 8fr 4fr;
  }

  .page-topics .topic-group--e .topic-group-cols {
    grid-template-columns: 5fr 7fr;
  }

  .page-topics .topic-group--f .topic-group-cols {
    grid-template-columns: 7fr 5fr;
  }

  .page-topics .topic-entry {
    padding: var(--space-4);
  }
}
<<<END>>>