.page-home {
  --rail-w: 96px;
  display: block;
  background: var(--color-surface);
}

/* ============ 左侧刻度栏 ============ */
.page-home .rail {
  display: none;
  position: fixed;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: var(--rail-w);
  z-index: 8;
}

.page-home .rail__inner {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: var(--space-2) 4px;
  background: color-mix(in srgb, var(--color-surface) 90%, transparent);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
}

.page-home .rail__item {
  display: block;
  padding: 6px var(--space-2);
  font-size: var(--text-xs);
  line-height: 1.3;
  color: var(--color-ink-muted);
  text-decoration: none;
  border-left: 2px solid transparent;
  border-radius: var(--radius-sm);
}

.page-home .rail__item:hover {
  color: var(--color-ink);
}

.page-home .rail__item.is-active {
  color: var(--color-accent);
  border-left-color: var(--color-accent);
  background: color-mix(in srgb, var(--color-accent) 8%, transparent);
}

@media (min-width: 1200px) {
  .page-home {
    padding-left: var(--rail-w);
  }
  .page-home .rail {
    display: block;
  }
}

/* ============ 首屏 ============ */
.page-home .hero {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding: var(--section-y-lg) 0;
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}

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

@media (min-width: 900px) {
  .page-home .hero__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: var(--space-8);
    align-items: start;
  }
}

.page-home .hero__kicker {
  margin: 0 0 var(--space-3);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-contrast-accent);
  font-family: var(--font-mono);
}

.page-home .hero__title {
  margin: 0 0 var(--space-4);
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: 1.06;
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
}

.page-home .hero__lede {
  margin: 0 0 var(--space-6);
  max-width: 34ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 82%, var(--color-contrast-surface));
}

.page-home .hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: 0;
}

/* 拼贴区 */
.page-home .hero__collage {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: var(--space-2);
}

@media (min-width: 560px) {
  .page-home .fig-card--a { grid-column: 1 / 5; grid-row: 1 / 3; }
  .page-home .fig-card--b { grid-column: 5 / 7; grid-row: 1 / 2; }
  .page-home .fig-card--c { grid-column: 5 / 7; grid-row: 2 / 3; }
  .page-home .fig-card--d { grid-column: 1 / 7; grid-row: 3 / 4; }
}

.page-home .fig-card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 128px;
  overflow: hidden;
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--color-contrast-ink) 5%, transparent);
  transition: border-color 180ms ease;
}

.page-home .fig-card:hover {
  border-color: var(--color-contrast-accent);
}

.page-home .fig-card--a {
  min-height: 300px;
}

.page-home .fig-card__media {
  position: absolute;
  inset: 0;
  margin: 0;
  z-index: 0;
}

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

.page-home .fig-card--a::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--overlay-scrim);
  z-index: 1;
  pointer-events: none;
}

.page-home .fig-card__body {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-4);
}

.page-home .fig-card__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-contrast-accent);
}

.page-home .fig-card__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: 500;
  line-height: 1;
  color: var(--color-contrast-ink);
}

.page-home .fig-card__num .unit {
  margin-left: 0.18em;
  font-family: var(--font-body);
  font-size: var(--text-xl);
  font-weight: 400;
  color: color-mix(in srgb, var(--color-contrast-ink) 72%, var(--color-contrast-surface));
}

.page-home .fig-card__dash {
  color: var(--color-contrast-accent);
}

.page-home .fig-card__cap {
  margin: 0;
  max-width: 24ch;
  font-size: var(--text-sm);
  line-height: 1.5;
  color: color-mix(in srgb, var(--color-contrast-ink) 78%, var(--color-contrast-surface));
}

/* ============ 区块头 ============ */
.page-home .section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-2) var(--space-3);
  padding-bottom: var(--space-2);
  margin-bottom: var(--space-6);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-home .section-head__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-primary);
}

.page-home .section-head__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

/* ============ 三条指标带 ============ */
.page-home .band-list {
  display: grid;
  gap: var(--space-2);
}

.page-home .band {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-2);
  padding: var(--space-4) var(--space-4) var(--space-4) var(--space-6);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  overflow: hidden;
}

.page-home .band::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
}

.page-home .band--m1::before { background: var(--color-primary); }
.page-home .band--m2::before { background: var(--color-accent); }
.page-home .band--m3::before { background: color-mix(in srgb, var(--color-accent) 55%, var(--color-primary)); }

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

.page-home .band__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  font-weight: 500;
  line-height: 1.1;
  color: var(--color-ink);
}

.page-home .band__num .unit {
  margin-left: 0.16em;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--color-ink-muted);
}

.page-home .band__dash {
  color: var(--color-accent);
}

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

.page-home .band__foot {
  margin: 0;
  padding-top: var(--space-2);
  border-top: var(--border-thin) solid var(--color-line);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

@media (min-width: 820px) {
  .page-home .band {
    grid-template-columns: 48px minmax(150px, 200px) minmax(0, 1fr) minmax(180px, 220px);
    align-items: center;
    gap: var(--space-4);
  }
  .page-home .band__foot {
    padding-top: 0;
    border-top: 0;
    border-left: var(--border-thin) solid var(--color-line);
    padding-left: var(--space-4);
  }
}

/* ============ 索引表 ============ */
.page-home .wide-figure {
  margin: 0 0 var(--space-6);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-home .wide-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 5;
  object-fit: cover;
}

.page-home .idx {
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-surface);
}

.page-home .idx--second {
  margin-top: var(--space-4);
}

.page-home .idx__head {
  display: none;
}

.page-home .idx__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-1);
  padding: var(--space-3) var(--space-4);
  border-bottom: var(--border-thin) solid var(--color-line);
  transition: background-color 160ms ease, border-color 160ms ease;
}

.page-home .idx__row:last-child {
  border-bottom: 0;
}

.page-home .idx__row:nth-child(even) {
  background: var(--color-surface-alt);
}

.page-home .idx__row:hover {
  background: var(--color-primary-soft);
}

.page-home .idx__cell {
  font-size: var(--text-base);
  line-height: 1.55;
  color: var(--color-ink);
}

.page-home .idx__cell--no {
  display: flex;
  align-items: center;
  gap: 0;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-home .idx__cell--desc {
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
}

.page-home .idx__dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 1px;
  margin-right: 10px;
  flex: none;
}

.page-home .idx__dot--c1 { background: var(--color-primary); }
.page-home .idx__dot--c2 { background: var(--color-accent); }
.page-home .idx__dot--c3 { background: color-mix(in srgb, var(--color-accent) 55%, var(--color-primary)); }
.page-home .idx__dot--c4 { background: color-mix(in srgb, var(--color-primary) 62%, var(--color-ink)); }

@media (min-width: 768px) {
  .page-home .idx__head {
    display: grid;
    grid-template-columns: 60px minmax(0, 12rem) minmax(0, 1fr);
    gap: var(--space-3);
    padding: var(--space-2) var(--space-4);
    background: var(--color-surface-deep);
    border-bottom: var(--border-thin) solid var(--color-line);
    font-size: var(--text-xs);
    letter-spacing: 0.08em;
    color: var(--color-ink-muted);
  }
  .page-home .idx__row {
    grid-template-columns: 60px minmax(0, 12rem) minmax(0, 1fr);
    gap: var(--space-3);
    align-items: center;
    padding: var(--space-3) var(--space-4);
    min-height: 40px;
  }
}

.page-home .idx__cta {
  margin: var(--space-6) 0 0;
}

/* ============ 数字来源 ============ */
.page-home .source-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
}

@media (min-width: 900px) {
  .page-home .source-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: var(--space-8);
    align-items: center;
  }
}

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

.page-home .source-grid__link {
  margin: var(--space-4) 0 0;
}

.page-home .source-grid__link a {
  font-size: var(--text-base);
  color: var(--color-ink);
  text-decoration: none;
  border-bottom: 2px solid var(--color-accent);
  padding-bottom: 2px;
}

.page-home .source-grid__link a:hover {
  color: var(--color-accent);
}

.page-home .source-grid__media {
  margin: 0;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-home .source-grid__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

/* ============ 从哪一步开始 ============ */
.page-home .start-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-3);
}

@media (min-width: 780px) {
  .page-home .start-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-home .start-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  transition: border-color 180ms ease;
}

.page-home .start-item:hover {
  border-color: var(--color-primary);
}

.page-home .start-item__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-primary);
}

.page-home .start-item__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-home .start-item__desc {
  margin: 0;
  flex: 1;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-home .start-item .btn {
  align-self: flex-start;
}

/* ============ 收尾区 ============ */
.page-home .closing {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding: var(--section-y-lg) 0;
}

.page-home .closing__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

.page-home .closing__inner {
  position: relative;
  z-index: 2;
  max-width: 640px;
}

.page-home .closing__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);
  color: var(--color-contrast-ink);
}

.page-home .closing__desc {
  margin: 0 0 var(--space-4);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 82%, var(--color-contrast-surface));
}

.page-home .closing__act {
  margin: 0 0 var(--space-4);
}

.page-home .closing__fine {
  margin: 0;
  font-size: var(--text-xs);
  color: color-mix(in srgb, var(--color-contrast-ink) 68%, var(--color-contrast-surface));
}

.page-home .closing__fine a {
  color: inherit;
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}

.page-home .closing__fine a:hover {
  color: var(--color-contrast-accent);
  border-bottom-color: var(--color-contrast-accent);
}

/* ============ 深色区块内的通用按钮微调 ============ */
.page-home .hero .btn--ghost {
  border-color: var(--color-contrast-line);
  color: var(--color-contrast-ink);
}

.page-home .hero .btn--ghost:hover {
  border-color: var(--color-contrast-accent);
  color: var(--color-contrast-accent);
}
<<<END>>>