.page-home {
  --home-hairline: var(--border-thin) solid var(--color-line);
}

.page-home .shell {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
  box-sizing: border-box;
}

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

.page-home figure {
  margin: 0;
}

.page-home .figure img,
.page-home .home-hero-figure img,
.page-home .home-line-figure img,
.page-home .home-index-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-home .figure-caption {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  margin-top: var(--space-1);
  line-height: var(--leading-body);
}

/* ---------- 首屏 ---------- */

.page-home .home-hero {
  padding-block: var(--space-6) var(--space-8);
  border-bottom: var(--home-hairline);
}

.page-home .home-hero-eyebrow {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
  text-transform: none;
}

.page-home .home-hero-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--color-primary);
  flex: none;
}

.page-home .home-hero-title {
  margin: var(--space-3) 0 0;
  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);
  text-align: left;
}

.page-home .home-hero-split {
  margin-top: var(--space-6);
  row-gap: var(--space-4);
}

.page-home .home-hero-lead {
  margin: 0;
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  max-width: var(--measure);
  border-left: var(--border-thick) solid var(--color-primary);
  padding-left: var(--space-3);
}

.page-home .home-stats {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-8);
  padding-bottom: var(--space-4);
  border-bottom: var(--home-hairline);
}

.page-home .home-stat {
  padding-top: var(--space-2);
  border-top: var(--home-hairline);
}

.page-home .home-stat-num {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: var(--text-figure);
  font-weight: var(--weight-heading);
  line-height: 0.94;
  letter-spacing: var(--tracking-heading);
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
}

.page-home .home-stat-unit {
  margin-left: var(--space-1);
  font-size: var(--text-lg);
  font-weight: var(--weight-body);
  color: var(--color-ink-muted);
}

.page-home .home-stat-text {
  margin: var(--space-2) 0 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  max-width: 26ch;
}

/* ---------- 主线区块 ---------- */

.page-home .home-line {
  padding-block: var(--space-8);
  border-bottom: var(--home-hairline);
}

.page-home .home-line--index {
  background: var(--color-surface-alt);
}

.page-home .home-line-num {
  font-size: var(--text-4xl);
  font-weight: var(--weight-heading);
  line-height: 1;
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink-muted);
  margin: 0;
}

.page-home .home-line-title {
  margin: 0 0 var(--space-3);
  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);
}

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

.page-home .home-line-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin: var(--space-4) 0 0;
}

.page-home .home-line-cta-note {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.page-home .home-line-textlink {
  font-size: var(--text-sm);
  color: var(--color-ink);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-line);
  padding-bottom: 2px;
  transition: color 180ms linear, border-color 180ms linear;
}

.page-home .home-line-textlink:hover,
.page-home .home-line-textlink:focus-visible {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

/* 展开组 */

.page-home .home-expand {
  margin-top: var(--space-4);
  border-top: var(--home-hairline);
}

.page-home .home-expand .expand-trigger {
  display: block;
  width: 100%;
  text-align: left;
  padding: var(--space-2) 0;
  background: transparent;
  border: 0;
  cursor: pointer;
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  letter-spacing: var(--tracking-heading);
  position: relative;
}

.page-home .home-expand .expand-trigger::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-primary);
  font-size: var(--text-lg);
  line-height: 1;
}

.page-home .home-expand .expand-trigger[aria-expanded="true"]::after {
  content: "–";
}

.page-home .home-expand .expand-trigger:focus-visible {
  outline: var(--border-thin) solid var(--color-focus);
  outline-offset: 2px;
}

.page-home .home-steps {
  list-style: none;
  margin: 0 0 var(--space-3);
  padding: 0;
}

.page-home .home-step {
  display: grid;
  grid-template-columns: 2.5rem minmax(0, 1fr);
  gap: var(--space-2);
  align-items: start;
  padding: var(--space-2) 0;
  border-bottom: var(--home-hairline);
}

.page-home .home-step-num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
  letter-spacing: 0.06em;
  padding-top: 4px;
}

.page-home .home-step-text {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-home .home-expand-text {
  margin: 0 0 var(--space-3);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  max-width: var(--measure);
}

/* 数据面板 */

.page-home .home-metrics {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin: 0;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-home .home-metric {
  display: flex;
  flex-direction: column-reverse;
  padding: var(--space-3) 0;
  border-bottom: var(--home-hairline);
}

.page-home .home-metric-label {
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
}

.page-home .home-metric-num {
  margin: 0 0 var(--space-1);
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: var(--weight-heading);
  line-height: 1;
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  font-variant-numeric: tabular-nums;
}

/* ---------- 索引快照 ---------- */

.page-home .home-index {
  padding-block: var(--space-8);
  background: var(--color-surface-deep);
}

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

.page-home .home-index-lead {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  max-width: var(--measure);
}

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

.page-home .home-index-card {
  background: var(--color-surface);
  border: var(--home-hairline);
  padding: var(--space-3);
  position: relative;
  transition: border-color 180ms linear;
}

.page-home .home-index-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: var(--border-thick);
  background: transparent;
  transition: background-color 180ms linear;
}

.page-home .home-index-card:hover::before,
.page-home .home-index-card:focus-within::before {
  background: var(--color-primary);
}

.page-home .home-index-card .file-card-num {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--text-4xl);
  font-weight: var(--weight-heading);
  line-height: 1;
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink-muted);
  font-variant-numeric: tabular-nums;
}

.page-home .home-index-card .file-card-title {
  margin: var(--space-2) 0 var(--space-1);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-home .home-index-card .file-card-text {
  margin: 0 0 var(--space-2);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-home .home-index-card .file-card-meta {
  margin: 0;
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  border-top: var(--home-hairline);
  padding-top: var(--space-1);
}

.page-home .home-index-figure {
  margin-top: var(--space-6);
  max-width: 480px;
}

/* ---------- 口径说明 ---------- */

.page-home .home-meta {
  padding-block: var(--space-8);
  border-bottom: var(--home-hairline);
}

.page-home .home-meta-side {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.page-home .home-meta-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin: var(--space-3) 0 0;
}

/* ---------- 反色收束 ---------- */

.page-home .home-close {
  padding-block: var(--space-8);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-home .home-close .shell {
  color: var(--color-contrast-ink);
}

.page-home .home-close-brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin: 0 0 var(--space-3);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  letter-spacing: 0.08em;
  color: var(--color-contrast-ink);
}

.page-home .home-close-title {
  margin: 0 0 var(--space-3);
  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);
}

.page-home .home-close-text {
  margin: 0 0 var(--space-2);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  max-width: var(--measure);
}

.page-home .home-close-text--muted {
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
  opacity: 0.78;
}

.page-home .home-close-strong {
  color: var(--color-contrast-accent);
  font-weight: var(--weight-heading);
}

.page-home .home-close-paths {
  border-top: var(--border-thin) solid var(--color-contrast-line);
  padding-top: var(--space-3);
}

.page-home .home-close-paths-title {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-contrast-ink);
  opacity: 0.7;
}

.page-home .home-close-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-home .home-close-list li {
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}

.page-home .home-close-link {
  display: block;
  padding: var(--space-2) 0;
  font-size: var(--text-base);
  color: var(--color-contrast-ink);
  text-decoration: none;
  transition: color 180ms linear;
}

.page-home .home-close-link:hover,
.page-home .home-close-link:focus-visible {
  color: var(--color-contrast-accent);
}

.page-home .home-close-link:focus-visible {
  outline: var(--border-thin) solid var(--color-contrast-accent);
  outline-offset: 2px;
}

/* ---------- 桌面布局 ---------- */

@media (min-width: 640px) {
  .page-home .home-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: var(--space-4);
  }

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

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

  .page-home .home-metric {
    padding-right: var(--space-2);
  }
}

@media (min-width: 960px) {
  .page-home .home-hero {
    padding-block: var(--section-y-lg) var(--section-y);
  }

  .page-home .home-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    column-gap: var(--gutter);
    row-gap: var(--space-6);
  }

  .page-home .home-hero-split {
    margin-top: var(--space-8);
  }

  .page-home .home-hero-lead {
    grid-column: 1 / span 5;
    align-self: end;
  }

  .page-home .home-hero-figure {
    grid-column: 8 / span 5;
  }

  .page-home .home-hero-eyebrow {
    grid-column: 1 / -1;
  }

  .page-home .home-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    column-gap: var(--space-3);
    margin-top: var(--section-y);
  }

  .page-home .home-line {
    padding-block: var(--section-y);
  }

  .page-home .home-line-grid {
    align-items: start;
  }

  .page-home .home-line-num {
    grid-column: 1 / span 1;
  }

  .page-home .home-line-body {
    grid-column: 3 / span 5;
  }

  .page-home .home-line-figure {
    grid-column: 9 / span 4;
    align-self: start;
  }

  .page-home .home-line--index .home-line-body {
    grid-column: 3 / span 4;
  }

  .page-home .home-metrics {
    grid-column: 8 / span 5;
    grid-template-columns: minmax(0, 1fr);
    border-top: var(--border-thin) solid var(--color-line);
    align-self: start;
  }

  .page-home .home-metric {
    flex-direction: row;
    align-items: baseline;
    justify-content: space-between;
    gap: var(--space-3);
    padding: var(--space-3) 0;
  }

  .page-home .home-metric-num {
    margin: 0;
    order: 2;
    font-size: var(--text-2xl);
  }

  .page-home .home-metric-label {
    order: 1;
  }

  .page-home .home-line-figure--left {
    grid-column: 1 / span 5;
  }

  .page-home .home-line-body--right {
    grid-column: 7 / span 6;
  }

  .page-home .home-index {
    padding-block: var(--section-y);
  }

  .page-home .home-index-head {
    grid-template-columns: 6rem minmax(0, 1fr);
    column-gap: var(--gutter);
    align-items: start;
    margin-bottom: var(--space-8);
  }

  .page-home .home-index-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-3);
  }

  .page-home .home-index-figure {
    margin-top: var(--space-8);
    margin-left: auto;
    width: 380px;
    max-width: 380px;
  }

  .page-home .home-meta {
    padding-block: var(--section-y);
  }

  .page-home .home-meta-grid {
    align-items: start;
  }

  .page-home .home-meta-main {
    grid-column: 1 / span 6;
  }

  .page-home .home-meta-side {
    grid-column: 8 / span 5;
  }

  .page-home .home-close {
    padding-block: var(--section-y);
  }

  .page-home .home-close-grid {
    align-items: start;
  }

  .page-home .home-close-main {
    grid-column: 1 / span 6;
  }

  .page-home .home-close-paths {
    grid-column: 8 / span 5;
    border-top: var(--border-thin) solid var(--color-contrast-line);
    padding-top: var(--space-3);
  }
}

@media (min-width: 1200px) {
  .page-home .home-index-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
<<<END>>>