.page-home {
  --rail-w: 240px;
  --home-line: 1px solid var(--rule);
  --home-line-soft: 1px solid var(--rule-soft);
  background-color: var(--ink-950);
  background-image:
    linear-gradient(90deg, rgba(147, 163, 181, 0.045) 1px, transparent 1px),
    linear-gradient(180deg, rgba(147, 163, 181, 0.045) 1px, transparent 1px);
  background-size: 64px 64px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  overflow-x: hidden;
}

.page-home .home-shell {
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(22px, 5vw, 44px) var(--gutter) 72px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}

/* ---------- 左侧对照栏 ---------- */
.page-home .home-rail {
  display: grid;
  gap: 10px;
  padding: 0 0 16px;
  border-bottom: var(--home-line);
}

.page-home .rail-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--sage);
}

.page-home .rail-switch {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-home .rail-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.page-home .rail-opt {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  cursor: pointer;
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

.page-home .rail-dot {
  display: block;
  width: 7px;
  height: 7px;
  background: var(--text-muted);
}

.page-home .rail-radio:checked + .rail-opt {
  color: var(--cyan);
  border-color: var(--cyan);
  background: var(--cyan-veil);
}

.page-home .rail-radio:checked + .rail-opt .rail-dot {
  background: var(--cyan);
}

.page-home .rail-radio:focus-visible + .rail-opt {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}

.page-home .rail-index {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
}

.page-home .rail-index a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 4px 0;
  font-size: 13px;
  color: var(--text-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-home .rail-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--sage);
}

.page-home .rail-index a:hover,
.page-home .rail-index a:focus-visible {
  color: var(--text);
  border-bottom-color: var(--amber);
}

.page-home .rail-index a:hover .rail-num {
  color: var(--cyan);
}

.page-home .rail-now {
  margin: 6px 0 0;
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.page-home .rail-now-key {
  color: var(--sage);
}

/* ---------- 首屏 ---------- */
.page-home .home-opening {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  padding: 30px 0 12px;
}

.page-home .home-opening h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 6.4vw, 44px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-home .home-lede {
  margin: 18px 0 0;
  max-width: var(--measure);
  font-size: 16px;
  color: var(--text);
}

.page-home .home-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  margin: 24px 0 0;
  padding: 16px 0 0;
  list-style: none;
  border-top: var(--home-line-soft);
}

.page-home .home-facts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
}

.page-home .home-facts b {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-home .home-figure {
  margin: 0;
  border: var(--home-line-soft);
  background: var(--ink-800);
}

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

.page-home .home-figure figcaption {
  padding: 10px 12px;
  border-top: var(--home-line-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: var(--text-muted);
}

.page-home .home-toc {
  border-top: var(--home-line);
  padding-top: 14px;
}

.page-home .home-toc-label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--sage);
}

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

.page-home .home-toc-item a {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 2px 12px;
  padding: 13px 0;
  border-bottom: var(--home-line-soft);
  text-decoration: none;
  color: var(--text);
}

.page-home .home-toc-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--cyan);
  grid-row: span 2;
  padding-top: 3px;
}

.page-home .home-toc-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.4;
  transition: color 0.18s ease;
}

.page-home .home-toc-desc {
  font-size: 13px;
  color: var(--text-muted);
  transition: color 0.18s ease;
}

.page-home .home-toc-item a:hover .home-toc-title,
.page-home .home-toc-item a:focus-visible .home-toc-title {
  color: var(--cyan);
}

.page-home .home-toc-item a:hover .home-toc-desc {
  color: var(--text);
}

/* ---------- 正文章节 ---------- */
.page-home .home-section {
  margin-top: 40px;
  padding-top: 30px;
  border-top: var(--home-line);
}

.page-home .home-sect-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 16px;
}

.page-home .home-sect-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  padding-top: 5px;
}

.page-home .home-section h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 4vw, 28px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-home .home-section p {
  max-width: var(--measure);
  margin: 0 0 14px;
  font-size: 16px;
}

.page-home .home-section a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-dim);
}

.page-home .home-section a:hover {
  border-bottom-color: var(--amber);
}

.page-home .home-defs {
  margin: 22px 0 0;
  border-top: var(--home-line-soft);
}

.page-home .home-def {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2px;
  padding: 12px 0;
  border-bottom: var(--home-line-soft);
}

.page-home .home-def dt {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-home .home-def dd {
  margin: 0;
  font-size: 15px;
  color: var(--text-muted);
}

.page-home .home-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

/* ---------- 对照示例 ---------- */
.page-home .cmp {
  margin: 26px 0 0;
  border: var(--home-line);
  background: var(--ink-900);
}

.page-home .cmp-row {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr) minmax(0, 1fr);
  border-bottom: var(--home-line-soft);
}

.page-home .cmp-row:last-child {
  border-bottom: none;
}

.page-home .cmp-row > span {
  padding: 10px 10px;
  font-size: 13.5px;
  line-height: 1.5;
  border-left: var(--home-line-soft);
  word-break: break-word;
}

.page-home .cmp-row > span:first-child {
  border-left: none;
}

.page-home .cmp-row--head > span {
  background: var(--ink-800);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--sage);
}

.page-home .cmp-k {
  color: var(--text-muted);
}

.page-home .cmp-n {
  color: var(--text);
}

.page-home .cmp-o {
  color: var(--text-muted);
}

.page-home .cmp-row--diff {
  background: rgba(242, 160, 61, 0.08);
}

.page-home .cmp-row--diff .cmp-k {
  color: var(--amber);
}

.page-home:has(#ver-old:checked) .cmp-n {
  color: var(--text-muted);
}

.page-home:has(#ver-old:checked) .cmp-o {
  color: var(--amber);
}

.page-home .home-figure--offset {
  margin-top: 26px;
}

/* ---------- 三条路径 ---------- */
.page-home .path-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-home .path-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: 20px 0;
  border-top: var(--home-line-soft);
}

.page-home .path-item:first-child {
  border-top: none;
  padding-top: 2px;
}

.page-home .path-tag {
  margin-top: 4px;
  padding: 2px 8px;
  background: var(--cyan);
  color: var(--ink-950);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  height: fit-content;
}

.page-home .path-body h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--text);
}

.page-home .path-body p {
  margin: 0 0 10px;
  font-size: 15px;
  color: var(--text-muted);
  max-width: 34em;
}

.page-home .path-link {
  display: inline-block;
  font-size: 14px;
  padding-bottom: 2px;
}

/* ---------- 提交准备 ---------- */
.page-home .prep-list {
  list-style: none;
  counter-reset: prep;
  margin: 20px 0 0;
  padding: 0;
}

.page-home .prep-list li {
  position: relative;
  counter-increment: prep;
  padding: 12px 0 12px 42px;
  border-top: var(--home-line-soft);
  font-size: 15px;
  color: var(--text-muted);
  max-width: 40em;
}

.page-home .prep-list li::before {
  content: counter(prep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--amber);
}

.page-home .prep-list strong {
  color: var(--text);
}

.page-home .home-note {
  margin: 20px 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--cyan-dim);
  font-size: 14px;
  color: var(--text-muted);
  max-width: 40em;
}

/* ---------- 结尾行动区 ---------- */
.page-home .home-cta {
  margin-top: 46px;
  padding: 26px 18px;
  background: var(--ink-900);
  border-top: 2px solid var(--cyan);
  display: grid;
  gap: 12px;
}

.page-home .home-cta-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(19px, 3.8vw, 24px);
  font-weight: 800;
  line-height: 1.4;
  letter-spacing: -0.01em;
  max-width: 26em;
  color: var(--text);
}

.page-home .home-cta-text {
  margin: 0;
  font-size: 14px;
  color: var(--text-muted);
  max-width: 34em;
}

.page-home .home-cta-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 16px;
  margin-top: 4px;
}

.page-home .home-cta-link {
  font-size: 14px;
  color: var(--text-muted);
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
}

.page-home .home-cta-link:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 平板 ---------- */
@media (min-width: 680px) {
  .page-home .home-def {
    grid-template-columns: 118px minmax(0, 1fr);
    gap: 18px;
    align-items: baseline;
  }

  .page-home .cmp-row > span {
    padding: 11px 14px;
    font-size: 14px;
  }

  .page-home .home-cta {
    padding: 30px 26px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-home .home-opening {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    column-gap: 32px;
    row-gap: 34px;
    padding: 44px 0 18px;
  }

  .page-home .home-opening-main {
    grid-column: 1 / span 7;
  }

  .page-home .home-opening-figure,
  .page-home .home-opening .home-figure {
    grid-column: 8 / span 5;
    align-self: start;
  }

  .page-home .home-toc {
    grid-column: 1 / span 7;
  }

  .page-home .home-split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 36px;
  }

  .page-home .home-section {
    margin-top: 52px;
    padding-top: 36px;
  }

  .page-home .home-sect-head {
    margin-bottom: 22px;
  }
}

@media (min-width: 1200px) {
  .page-home .home-shell {
    grid-template-columns: var(--rail-w) minmax(0, 1fr);
    column-gap: 44px;
    align-items: start;
    padding-bottom: 96px;
  }

  .page-home .home-rail {
    position: sticky;
    top: 92px;
    align-self: start;
    padding: 4px 0 4px 18px;
    border-bottom: none;
    border-left: 1px solid var(--rule);
    gap: 14px;
  }

  .page-home .rail-index {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
  }

  .page-home .rail-index a {
    display: flex;
    padding: 6px 0;
  }

  .page-home .home-opening {
    padding-top: 8px;
  }
}
<<<PAGE_CSS_END>>>