.page-home {
  --home-glass-line: color-mix(in srgb, var(--color-primary) 24%, transparent);
  --home-glass-fill: color-mix(in srgb, var(--color-surface) 80%, transparent);
  --home-dark-line: color-mix(in srgb, var(--color-contrast-ink) 22%, transparent);
  --home-dark-fill: color-mix(in srgb, var(--color-contrast-ink) 7%, transparent);
  --home-dim: color-mix(in srgb, var(--color-contrast-ink) 60%, transparent);
  display: block;
}

/* ---------- 首屏框景 ---------- */
.page-home .hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--color-contrast-surface);
  padding: calc(var(--space-8) * 1.75) 0 var(--section-y);
}

.page-home .hero__media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

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

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

.page-home .hero__inner {
  position: relative;
  z-index: 1;
}

.page-home .hero__frame {
  position: relative;
  padding: var(--space-4);
  border: var(--border-thin) solid var(--home-dark-line);
  border-radius: var(--radius-lg);
  background: var(--home-dark-fill);
  backdrop-filter: blur(16px) saturate(125%);
  box-shadow: var(--shadow-2);
  color: var(--color-contrast-ink);
}

.page-home .hero__frame::before,
.page-home .hero__frame::after {
  content: "";
  position: absolute;
  width: 26px;
  height: 26px;
  border: var(--border-thin) solid var(--color-contrast-accent);
  opacity: 0.75;
  pointer-events: none;
}

.page-home .hero__frame::before {
  top: 9px;
  left: 9px;
  border-right: 0;
  border-bottom: 0;
}

.page-home .hero__frame::after {
  right: 9px;
  bottom: 9px;
  border-left: 0;
  border-top: 0;
}

.page-home .hero__frame-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-1) var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--home-dim);
}

.page-home .hero__title {
  margin: var(--space-6) 0 var(--space-3);
  font-size: var(--text-display);
  line-height: 0.94;
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
}

.page-home .hero__lede {
  max-width: 48ch;
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 84%, transparent);
}

.page-home .hero__figures {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
}

.page-home .hfig {
  display: grid;
  gap: 4px;
  padding-top: var(--space-2);
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

.page-home .hfig__num {
  font-family: var(--font-mono);
  font-size: calc(var(--text-figure) * 0.62);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--color-contrast-ink);
}

.page-home .hfig__label {
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: color-mix(in srgb, var(--color-contrast-ink) 62%, transparent);
}

.page-home .hero__frame-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  margin-top: var(--space-6);
}

.page-home .hero__stamp {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-contrast-accent);
  padding: 6px 12px;
  border: var(--border-thin) solid color-mix(in srgb, var(--color-contrast-accent) 45%, transparent);
  border-radius: var(--radius-pill);
}

/* ---------- 双维索引 ---------- */
.page-home .index-overview {
  background:
    radial-gradient(120% 90% at 10% 0%, color-mix(in srgb, var(--color-primary-soft) 90%, transparent) 0%, transparent 62%),
    radial-gradient(90% 70% at 100% 100%, color-mix(in srgb, var(--color-highlight) 70%, transparent) 0%, transparent 58%),
    var(--color-surface);
}

.page-home .index-overview__title,
.page-home .column-index__title,
.page-home .paths__title {
  font-size: var(--text-3xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-home .index-overview__lede,
.page-home .column-index__lede,
.page-home .paths__lede {
  max-width: var(--measure);
  margin-top: var(--space-2);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-home .overview-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.page-home .timeline-block {
  padding: var(--space-4);
  border: var(--border-thin) solid var(--home-glass-line);
  border-radius: var(--radius-lg);
  background: var(--home-glass-fill);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-1);
}

.page-home .timeline-block__title {
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  color: var(--color-ink);
  margin-bottom: var(--space-4);
}

.page-home .tl__rail {
  color: color-mix(in srgb, var(--color-primary) 38%, transparent);
}

.page-home .tl__rail svg {
  display: block;
  width: 100%;
  height: 8px;
}

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

.page-home .tl__node {
  position: relative;
  display: grid;
  gap: 3px;
  padding-left: var(--space-3);
  border-left: var(--border-thin) solid color-mix(in srgb, var(--color-primary) 28%, transparent);
}

.page-home .tl__dot {
  position: absolute;
  left: -5px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--color-accent) 16%, transparent);
}

.page-home .tl__node--current .tl__dot {
  background: var(--color-contrast-accent);
  box-shadow: 0 0 0 5px color-mix(in srgb, var(--color-contrast-accent) 22%, transparent);
}

.page-home .tl__num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-accent);
}

.page-home .tl__name {
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-home .tl__desc {
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--color-ink-soft);
}

.page-home .overview-grid__aside {
  display: grid;
  gap: var(--space-3);
  align-content: start;
}

.page-home .overview-grid__aside .media-frame {
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-surface-deep);
}

.page-home .overview-grid__aside .media-frame img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.page-home .field-list {
  margin: 0;
  display: grid;
  gap: var(--space-1);
}

.page-home .field-list__row {
  display: grid;
  grid-template-columns: 5.5rem minmax(0, 1fr);
  gap: var(--space-2);
  align-items: baseline;
  padding-bottom: var(--space-1);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-home .field-list__row dt {
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.page-home .field-list__row dd {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-ink);
}

.page-home .topic-strip {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-2);
}

.page-home .topic-strip__item {
  display: grid;
  gap: 4px;
  padding: var(--space-2) var(--space-3);
  border-left: 2px solid var(--color-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: color-mix(in srgb, var(--color-primary-soft) 58%, transparent);
}

.page-home .topic-strip__num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-primary);
}

.page-home .topic-strip__name {
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-home .topic-strip__meta {
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--color-ink-muted);
}

/* ---------- 栏目入口 ---------- */
.page-home .column-index {
  position: relative;
  overflow: hidden;
  background: var(--color-surface-alt);
}

.page-home .column-index__glow {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.28;
}

.page-home .column-index__glow img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-home .column-index__glow::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg,
    color-mix(in srgb, var(--color-surface-alt) 72%, transparent) 0%,
    var(--color-surface-alt) 78%);
}

.page-home .column-index .container {
  position: relative;
  z-index: 1;
}

.page-home .col-matrix {
  margin-top: var(--space-6);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-home .col-row {
  display: grid;
  gap: var(--space-2);
  padding: var(--space-4) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-home .col-row__num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-accent);
}

.page-home .col-row__name {
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
}

.page-home .col-row__name a {
  color: var(--color-ink);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color 0.22s ease, color 0.22s ease;
}

.page-home .col-row__name a:hover,
.page-home .col-row__name a:focus-visible {
  color: var(--color-primary);
  border-bottom-color: var(--color-accent);
}

.page-home .col-row__desc {
  max-width: 62ch;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-home .col-row__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-3);
  margin: 0;
}

.page-home .col-row__meta-item {
  display: flex;
  gap: 6px;
  align-items: baseline;
}

.page-home .col-row__meta-item dt {
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.page-home .col-row__meta-item dd {
  margin: 0;
  font-size: var(--text-xs);
  color: var(--color-ink);
}

.page-home .col-row__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.page-home .col-row__link {
  display: inline-block;
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  border: var(--border-thin) solid var(--color-primary);
  color: var(--color-primary);
  text-decoration: none;
  transition: background-color 0.22s ease, color 0.22s ease;
}

.page-home .col-row__link:hover,
.page-home .col-row__link:focus-visible {
  background: var(--color-primary);
  color: var(--color-primary-ink);
}

.page-home .col-row__link--sub {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.page-home .col-row__link--sub:hover,
.page-home .col-row__link--sub:focus-visible {
  background: var(--color-accent);
  color: var(--color-accent-ink);
}

/* ---------- 沿革摘录 ---------- */
.page-home .archive {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-home .archive .section-label__text {
  color: var(--color-contrast-ink);
}

.page-home .archive .section-label__num {
  color: var(--color-contrast-accent);
}

.page-home .archive__title {
  font-size: var(--text-3xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
}

.page-home .archive__lede {
  max-width: var(--measure);
  margin-top: var(--space-2);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 72%, transparent);
}

.page-home .archive__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.page-home .archive__media {
  margin: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: color-mix(in srgb, var(--color-contrast-ink) 8%, transparent);
}

.page-home .archive__media img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.page-home .archive__list {
  display: grid;
  gap: var(--space-2);
}

.page-home .arc-entry {
  display: grid;
  gap: var(--space-2);
  padding: var(--space-3) 0 var(--space-4);
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

.page-home .arc-entry__head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-1) var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
}

.page-home .arc-entry__id {
  color: var(--color-contrast-accent);
}

.page-home .arc-entry__date {
  color: color-mix(in srgb, var(--color-contrast-ink) 58%, transparent);
}

.page-home .arc-entry__title {
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  color: var(--color-contrast-ink);
}

.page-home .arc-entry__fields {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-1) var(--space-3);
  margin: 0;
}

.page-home .arc-entry__field {
  display: flex;
  gap: var(--space-1);
  align-items: baseline;
}

.page-home .arc-entry__field dt {
  flex: 0 0 auto;
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: color-mix(in srgb, var(--color-contrast-ink) 52%, transparent);
}

.page-home .arc-entry__field dd {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
}

/* ---------- 阅读路径 ---------- */
.page-home .paths {
  background:
    linear-gradient(180deg, var(--color-surface) 0%, color-mix(in srgb, var(--color-primary-soft) 52%, var(--color-surface)) 100%);
}

.page-home .path-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.page-home .path-card {
  display: grid;
  gap: var(--space-2);
  padding: var(--space-4);
  border: var(--border-thin) solid var(--home-glass-line);
  border-radius: var(--radius-lg);
  background: var(--home-glass-fill);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-1);
  transition: border-color 0.22s ease, box-shadow 0.22s ease;
}

.page-home .path-card:hover,
.page-home .path-card:focus-within {
  border-color: color-mix(in srgb, var(--color-primary) 58%, transparent);
  box-shadow: var(--shadow-2);
}

.page-home .path-card__tag {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-accent);
}

.page-home .path-card__title {
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

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

.page-home .path-list__item {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: var(--space-1) var(--space-2);
  align-items: baseline;
  padding-top: var(--space-2);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-home .path-list__num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

.page-home .path-list__item a {
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 2px solid color-mix(in srgb, var(--color-accent) 45%, transparent);
  transition: border-color 0.22s ease;
}

.page-home .path-list__item a:hover,
.page-home .path-list__item a:focus-visible {
  border-bottom-color: var(--color-accent);
}

.page-home .path-list__note {
  grid-column: 2;
  font-size: var(--text-xs);
  line-height: 1.65;
  color: var(--color-ink-soft);
}

.page-home .paths__note {
  max-width: var(--measure);
  margin-top: var(--space-4);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-home .paths__note a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-home .paths__note a:hover,
.page-home .paths__note a:focus-visible {
  color: var(--color-focus);
}

/* ---------- 章节滚动状态 ---------- */
.page-home [data-chapter] {
  transition: opacity 0.24s ease;
}

.page-home [data-chapter][data-active="false"] {
  opacity: 0.7;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-home .hero__frame {
    padding: var(--space-6);
  }

  .page-home .hero__figures {
    gap: var(--space-4);
  }

  .page-home .topic-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-home .arc-entry__fields {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-home .overview-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: var(--space-6);
  }

  .page-home .tl {
    grid-template-columns: repeat(7, minmax(0, 1fr));
    gap: 0;
  }

  .page-home .tl__node {
    padding: var(--space-4) var(--space-2) 0 0;
    border-left: 0;
    border-top: var(--border-thin) solid color-mix(in srgb, var(--color-primary) 28%, transparent);
  }

  .page-home .tl__dot {
    left: 0;
    top: -5px;
  }

  .page-home .tl__node--current {
    border-top-color: color-mix(in srgb, var(--color-contrast-accent) 70%, transparent);
  }

  .page-home .col-row {
    grid-template-columns: 3.5rem minmax(8rem, 13rem) minmax(0, 1fr);
    align-items: start;
    gap: var(--space-2) var(--space-4);
  }

  .page-home .col-row__meta {
    grid-column: 3;
  }

  .page-home .col-row__links {
    grid-column: 3;
  }

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

  .page-home .topic-strip {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1180px) {
  .page-home .hero__frame {
    padding: var(--space-8);
  }
}
</PAGE_CSS>>>