.page-topics {
  --topics-tile-min: 168px;
  --topics-path-tint: 10%;
  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 [id^="topic-"] {
  scroll-margin-top: var(--space-8);
}

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

.page-topics .eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin: 0 0 var(--space-2);
  opacity: 0.85;
}

/* ---------- 首屏 ---------- */

.page-topics .topics-hero {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding-block: var(--section-y-lg) var(--section-y);
}

.page-topics .topics-hero .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  font-size: var(--text-sm);
  margin-bottom: var(--space-6);
  opacity: 0.85;
}

.page-topics .topics-hero .breadcrumbs a {
  color: var(--color-contrast-accent);
  text-decoration: none;
}

.page-topics .topics-hero .breadcrumbs a:hover {
  text-decoration: underline;
}

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

.page-topics .topics-hero-lead {
  grid-column: span 4;
}

.page-topics .topics-title {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-display);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  margin: 0 0 var(--space-4);
  color: var(--color-primary);
}

.page-topics .topics-intro {
  max-width: 42ch;
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  margin: 0;
  color: var(--color-contrast-ink);
}

.page-topics .topics-hero-visual {
  grid-column: span 2;
}

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

.page-topics .topic-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: var(--border-thick) solid currentColor;
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, currentColor 12%, transparent);
  object-fit: cover;
}

.page-topics .topic-figure figcaption {
  font-size: var(--text-sm);
  line-height: 1.6;
  margin-top: var(--space-2);
  opacity: 0.74;
}

.page-topics .topics-figures {
  list-style: none;
  margin: var(--space-8) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-4);
}

.page-topics .topics-figure-value {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: 1.1;
  color: var(--color-contrast-accent);
}

.page-topics .topics-figure-label {
  display: block;
  font-size: var(--text-sm);
  margin-top: var(--space-1);
  color: var(--color-contrast-ink);
  opacity: 0.76;
}

/* ---------- 主题目录墙 ---------- */

.page-topics .topics-wall {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 2px;
  margin-top: var(--space-8);
}

.page-topics .topic-tile {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--space-3);
  min-height: var(--topics-tile-min);
  padding: var(--space-3);
  text-decoration: none;
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-ink);
  transition: background-color 260ms ease, color 260ms ease;
}

.page-topics .topic-tile:nth-child(1) { grid-column: span 4; }
.page-topics .topic-tile:nth-child(2) { grid-column: span 2; }
.page-topics .topic-tile:nth-child(3) { grid-column: span 2; }
.page-topics .topic-tile:nth-child(4) { grid-column: span 4; }
.page-topics .topic-tile:nth-child(5) { grid-column: span 3; }
.page-topics .topic-tile:nth-child(6) { grid-column: span 3; }

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

.page-topics .topic-tile:hover,
.page-topics .topic-tile:focus-visible {
  background: var(--color-primary);
  color: var(--color-primary-ink);
}

.page-topics .topic-tile:nth-child(odd):hover,
.page-topics .topic-tile:nth-child(odd):focus-visible {
  background: var(--color-surface);
  color: var(--color-ink);
}

.page-topics .topic-tile-no {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.18em;
  opacity: 0.7;
}

.page-topics .topic-tile-name {
  display: block;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
}

.page-topics .topic-tile-note {
  display: block;
  font-size: var(--text-sm);
  line-height: 1.6;
  margin-top: var(--space-1);
  max-width: 30ch;
  opacity: 0.82;
}

/* ---------- 主题分组 ---------- */

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

.page-topics .topic-group--surface {
  background: var(--color-surface);
  color: var(--color-ink);
}

.page-topics .topic-group--primary {
  background: var(--color-primary);
  color: var(--color-primary-ink);
}

.page-topics .topic-group--contrast {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-topics .topic-group-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: var(--gutter);
  align-items: start;
}

.page-topics .tg-main { grid-column: span 4; }
.page-topics .tg-aside { grid-column: span 2; }

.page-topics .topic-group--b .tg-main { grid-column: 3 / span 4; }
.page-topics .topic-group--b .tg-aside { grid-column: 1 / span 2; }

.page-topics .topic-group--c .tg-main { grid-column: span 3; }
.page-topics .topic-group--c .tg-aside { grid-column: span 3; }

.page-topics .topic-group-title {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-2xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  margin: 0 0 var(--space-3);
  max-width: 20ch;
}

.page-topics .topic-value {
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  max-width: 44ch;
  margin: 0 0 var(--space-4);
}

.page-topics .topic-points {
  list-style: none;
  margin: 0 0 var(--space-4);
  padding: 0;
  display: grid;
  gap: var(--space-2);
  max-width: 62ch;
}

.page-topics .topic-points li {
  position: relative;
  padding-left: var(--space-3);
  line-height: var(--leading-body);
}

.page-topics .topic-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 12px;
  height: 2px;
  background: currentColor;
  opacity: 0.5;
}

.page-topics .topic-quote {
  margin: var(--space-4) 0;
  padding-left: var(--space-4);
  max-width: 44ch;
  font-size: var(--text-lg);
  line-height: var(--leading-body);
}

.page-topics .topic-quote::before { content: "“"; opacity: 0.5; }
.page-topics .topic-quote::after { content: "”"; opacity: 0.5; }

.page-topics .topic-paths {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.page-topics .topic-path {
  display: grid;
  grid-template-columns: max-content minmax(0, 1fr);
  gap: var(--space-3);
  align-items: start;
  padding: var(--space-3);
  padding-bottom: calc(var(--space-3) + 12px);
  background: color-mix(in srgb, currentColor var(--topics-path-tint), transparent);
  border-radius: var(--radius-sm);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), 0 100%);
}

.page-topics .topic-path-no {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: 1;
  opacity: 0.55;
}

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

.page-topics .topic-path-note {
  margin: var(--space-1) 0 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  max-width: 52ch;
  opacity: 0.82;
}

.page-topics .topic-cta {
  margin: var(--space-6) 0 0;
}

.page-topics .btn {
  display: inline-block;
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-base);
  line-height: 1.3;
  text-decoration: none;
  border: var(--border-thick) solid currentColor;
  border-radius: var(--radius-sm);
  background: transparent;
  color: inherit;
  transition: background-color 240ms ease, color 240ms ease;
}

.page-topics .btn:hover,
.page-topics .btn:focus-visible {
  background: currentColor;
  color: var(--color-contrast-surface);
}

.page-topics .topic-group--primary .btn:hover,
.page-topics .topic-group--primary .btn:focus-visible {
  color: var(--color-primary);
}

.page-topics .topic-group--contrast .btn:hover,
.page-topics .topic-group--contrast .btn:focus-visible {
  color: var(--color-contrast-surface);
}

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

/* ---------- 按处境挑路径 ---------- */

.page-topics .topics-stances {
  background: var(--color-surface-alt);
  color: var(--color-ink);
  padding-block: var(--section-y);
}

.page-topics .topics-section-title {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-2xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  margin: 0 0 var(--space-3);
  max-width: 24ch;
}

.page-topics .topics-section-lead {
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  max-width: 52ch;
  margin: 0 0 var(--space-6);
  color: var(--color-ink-soft);
}

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

.page-topics .stance-card {
  padding: var(--space-4);
  background: var(--color-surface);
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
}

.page-topics .stance-card:nth-child(2) {
  background: var(--color-primary-soft);
}

.page-topics .stance-title {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  margin: 0 0 var(--space-2);
}

.page-topics .stance-lead {
  margin: 0 0 var(--space-3);
  color: var(--color-ink-soft);
}

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

.page-topics .stance-list li {
  display: grid;
  grid-template-columns: max-content minmax(0, 1fr);
  gap: var(--space-2);
  align-items: baseline;
  line-height: var(--leading-body);
}

.page-topics .stance-no {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-accent);
  letter-spacing: 0.06em;
}

.page-topics .stance-note {
  margin: var(--space-3) 0 0;
  padding-left: var(--space-3);
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-muted);
}

/* ---------- 更新节奏 ---------- */

.page-topics .topics-rhythm {
  background: var(--color-surface);
  color: var(--color-ink);
  padding-block: var(--section-y);
}

.page-topics .rhythm-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: var(--gutter);
  align-items: start;
}

.page-topics .rhythm-main {
  grid-column: span 4;
}

.page-topics .rhythm-aside {
  grid-column: 5 / span 2;
  padding: var(--space-3);
  background: var(--color-highlight);
  border-radius: var(--radius-sm);
}

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

.page-topics .rhythm-list li {
  display: grid;
  grid-template-columns: minmax(0, 14ch) minmax(0, 1fr);
  gap: var(--space-3);
  align-items: baseline;
  padding-bottom: var(--space-3);
  border-bottom: var(--border-thin) solid var(--color-line);
}

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

.page-topics .rhythm-key {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: var(--color-accent);
}

.page-topics .rhythm-text {
  line-height: var(--leading-body);
  max-width: 52ch;
}

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

.page-topics .order-list li {
  display: grid;
  grid-template-columns: max-content minmax(0, 1fr);
  gap: var(--space-2);
  align-items: baseline;
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-soft);
}

.page-topics .order-no {
  font-family: var(--font-mono);
  color: var(--color-accent);
  font-weight: var(--weight-heading);
}

/* ---------- 下一步出口 ---------- */

.page-topics .topics-next {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding-block: var(--section-y-lg);
}

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

.page-topics .topics-next .topics-section-lead {
  color: var(--color-contrast-ink);
  opacity: 0.8;
}

.page-topics .next-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 2px;
}

.page-topics .next-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4);
  text-decoration: none;
  background: var(--color-primary);
  color: var(--color-primary-ink);
  border-radius: var(--radius-sm);
  transition: background-color 260ms ease, color 260ms ease;
}

.page-topics .next-card:nth-child(even) {
  background: var(--color-surface);
  color: var(--color-ink);
}

.page-topics .next-card:hover,
.page-topics .next-card:focus-visible {
  background: var(--color-surface);
  color: var(--color-ink);
}

.page-topics .next-card:nth-child(even):hover,
.page-topics .next-card:nth-child(even):focus-visible {
  background: var(--color-primary);
  color: var(--color-primary-ink);
}

.page-topics .next-kicker {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.14em;
  opacity: 0.72;
}

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

.page-topics .next-note {
  display: block;
  font-size: var(--text-sm);
  line-height: 1.7;
  opacity: 0.82;
}

.page-topics .next-tail {
  margin: var(--space-6) 0 0;
  max-width: 62ch;
  color: var(--color-contrast-ink);
  opacity: 0.86;
}

.page-topics .next-tail a {
  color: var(--color-contrast-accent);
}

/* ---------- 响应式 ---------- */

@media (max-width: 900px) {
  .page-topics .topics-hero-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .page-topics .topics-hero-lead,
  .page-topics .topics-hero-visual {
    grid-column: auto;
  }

  .page-topics .topics-intro {
    max-width: 60ch;
  }

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

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

  .page-topics .topic-tile:nth-child(1),
  .page-topics .topic-tile:nth-child(2),
  .page-topics .topic-tile:nth-child(3),
  .page-topics .topic-tile:nth-child(4),
  .page-topics .topic-tile:nth-child(5),
  .page-topics .topic-tile:nth-child(6) {
    grid-column: span 1;
  }

  .page-topics .topic-group-grid,
  .page-topics .rhythm-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .page-topics .tg-main,
  .page-topics .tg-aside,
  .page-topics .topic-group--b .tg-main,
  .page-topics .topic-group--b .tg-aside,
  .page-topics .topic-group--c .tg-main,
  .page-topics .topic-group--c .tg-aside,
  .page-topics .rhythm-main,
  .page-topics .rhythm-aside {
    grid-column: auto;
  }

  .page-topics .stance-grid {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }

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

@media (max-width: 640px) {
  .page-topics {
    --topics-tile-min: 132px;
  }

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

  .page-topics .topic-group,
  .page-topics .topics-stances,
  .page-topics .topics-rhythm {
    padding-block: var(--space-8);
  }

  .page-topics .topics-next {
    padding-block: var(--space-8);
  }

  .page-topics .topics-wall {
    gap: 2px;
  }

  .page-topics .topic-tile {
    gap: var(--space-2);
  }

  .page-topics .topic-tile-name {
    font-size: var(--text-base);
  }

  .page-topics .topic-path {
    grid-template-columns: 1fr;
    gap: var(--space-1);
  }

  .page-topics .topic-path-no {
    font-size: var(--text-lg);
  }

  .page-topics .rhythm-list li {
    grid-template-columns: 1fr;
    gap: var(--space-1);
  }

  .page-topics .next-grid {
    grid-template-columns: 1fr;
  }
}