.page-home {
  --ph-gap: clamp(28px, 5vw, 64px);
  --ph-sec-pad: clamp(56px, 8vw, 112px);
  display: block;
}

.page-home > .section {
  padding: var(--ph-sec-pad) 0;
}

/* ---------- 首屏 ---------- */
.page-home > .section.hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: calc(var(--header-h) + 52px) 0 clamp(52px, 7vw, 96px);
}

.page-home .hero-grid {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: cover;
  opacity: .28;
  pointer-events: none;
}

.page-home .hero-split {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: start;
}

.page-home .hero-main { order: 1; }
.page-home .hero-rail { order: 2; }

.page-home .hero-rail {
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--line-dark);
}

.page-home .rail-title {
  margin: 0;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--gold-500);
}

.page-home .rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}

.page-home .rail-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-dim);
  border-bottom: 1px solid var(--line-dark);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.page-home .rail-link::after {
  content: "→";
  font-family: var(--font-mono);
  font-size: 12px;
  opacity: .55;
}

.page-home .rail-link:hover,
.page-home .rail-link:focus-visible {
  color: var(--gold-300);
  border-bottom-color: var(--gold-500);
  padding-left: 6px;
}

.page-home .status-pop {
  display: flex;
  flex-direction: column;
  gap: 6px;
  outline: none;
}

.page-home .status-note {
  display: block;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-dim);
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.page-home .status-pop:hover .status-note,
.page-home .status-pop:focus-within .status-note,
.page-home .status-pop:focus .status-note {
  max-height: 80px;
  opacity: 1;
}

.page-home .hero-context {
  margin: 0 0 18px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--gold-300);
}

.page-home .hero-title {
  margin: 0 0 24px;
  font-size: clamp(30px, 8.5vw, 88px);
  line-height: 1.02;
  font-weight: 800;
  letter-spacing: -.035em;
  color: var(--warm-050);
  overflow-wrap: break-word;
}

.page-home .hero-lead {
  max-width: 48ch;
  margin: 0 0 28px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-home .hero-meta {
  margin: 0 0 26px;
  padding-top: 18px;
  border-top: 1px solid var(--line-dark);
  font-size: 12px;
  letter-spacing: .08em;
  line-height: 1.8;
  color: var(--gold-300);
}

.page-home .hero-entries {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
}

.page-home .entry {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 14px;
  align-items: baseline;
  padding: 18px 2px;
  border-top: 1px solid var(--line-dark);
  color: var(--warm-050);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-home .entry:hover,
.page-home .entry:focus-visible {
  color: var(--gold-300);
  border-top-color: var(--gold-500);
  background: rgba(200, 155, 60, .07);
}

.page-home .entry-idx {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--gold-500);
}

.page-home .entry-name {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -.01em;
}

.page-home .entry-desc {
  grid-column: 2;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-dim);
}

/* ---------- 章节通用 ---------- */
.page-home .sec-head {
  max-width: 62ch;
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-home .section-label {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--gold-500);
}

.page-home .bg-warm .section-label,
.page-home .bg-paper .section-label {
  color: var(--signal-600);
}

.page-home .sec-title {
  margin: 0 0 18px;
  font-size: clamp(25px, 4.4vw, 44px);
  line-height: 1.18;
  font-weight: 800;
  letter-spacing: -.022em;
}

.page-home .bg-ink .sec-title,
.page-home .bg-ink-800 .sec-title {
  color: var(--warm-050);
}

.page-home .bg-warm .sec-title,
.page-home .bg-paper .sec-title {
  color: var(--ink-950);
}

.page-home .sec-lead {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--graphite-600);
}

.page-home .bg-ink .sec-lead,
.page-home .bg-ink-800 .sec-lead {
  color: var(--text-dim);
}

.page-home .sec-foot {
  margin: 26px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--graphite-600);
}

.page-home .text-link {
  color: var(--ink-950);
  border-bottom: 2px solid var(--gold-500);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-home .text-link:hover,
.page-home .text-link:focus-visible {
  color: var(--signal-600);
  border-bottom-color: var(--signal-600);
}

/* ---------- 图片 ---------- */
.page-home .fig-block {
  margin: 0 0 clamp(26px, 4vw, 40px);
}

.page-home .fig-frame {
  overflow: hidden;
  border-radius: var(--r-lg);
  background: var(--ink-800);
}

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

.page-home .fig-cap {
  margin: 12px 2px 0;
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: .04em;
  color: var(--graphite-600);
}

.page-home .bg-ink .fig-cap,
.page-home .bg-ink-800 .fig-cap {
  color: var(--text-dim);
}

.page-home .bg-ink-800 .fig-frame {
  background: var(--ink-950);
}

/* ---------- 对照表 ---------- */
.page-home .table-caption {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--graphite-600);
}

.page-home .table-wrap {
  overflow-x: auto;
  border-radius: var(--r-md);
}

.page-home .spec-table {
  width: 100%;
  min-width: 700px;
  border-collapse: collapse;
  font-size: 14px;
  line-height: 1.65;
}

.page-home .spec-table th,
.page-home .spec-table td {
  text-align: left;
  padding: 14px 16px;
  vertical-align: top;
  border-bottom: 1px solid var(--line-light);
}

.page-home .spec-table thead th {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .06em;
  color: var(--graphite-600);
  border-bottom: 1px solid var(--graphite-600);
  white-space: nowrap;
}

.page-home .spec-table tbody tr:nth-child(even) {
  background: var(--paper-100);
}

.page-home .spec-table tbody th {
  font-weight: 700;
  color: var(--ink-950);
  white-space: nowrap;
}

.page-home .spec-table td {
  color: #2B3036;
}

/* ---------- 版本节奏 ---------- */
.page-home .cd-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}

.page-home .cd-copy .sec-lead {
  margin-bottom: 30px;
}

.page-home .fact-list {
  list-style: none;
  margin: 0 0 32px;
  padding: 0;
}

.page-home .fact-list li {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  gap: 16px;
  align-items: baseline;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-dark);
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-home .fact-num {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--gold-300);
}

.page-home .read-modes {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-home .read-mode {
  padding: 20px 22px 22px;
  border: 1px solid var(--line-dark);
  border-radius: var(--r-md);
  background: rgba(247, 245, 240, .04);
}

.page-home .read-mode p {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-home .cd-grid .fig-block {
  margin-bottom: 0;
}

/* ---------- 案例对照 ---------- */
.page-home .case-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 64px);
  align-items: start;
}

.page-home .case-copy { order: 1; }
.page-home .fig-slice { order: 2; }

.page-home .case-copy .sec-lead {
  margin-bottom: 26px;
}

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

.page-home .case-item {
  padding: 22px 0;
  border-bottom: 1px solid var(--line-light);
}

.page-home .case-item:first-child {
  border-top: 1px solid var(--line-light);
}

.page-home .case-title {
  margin: 12px 0 8px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -.01em;
  color: var(--ink-950);
}

.page-home .case-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--graphite-600);
}

.page-home .fig-slice {
  margin-bottom: 0;
}

/* ---------- 下一步 ---------- */
.page-home .next-grid {
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--line-dark);
}

.page-home .next-card {
  display: block;
  padding: 26px 4px 30px;
  border-bottom: 1px solid var(--line-dark);
  transition: background-color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.page-home .next-card:hover,
.page-home .next-card:focus-visible {
  background: rgba(200, 155, 60, .09);
  padding-left: 16px;
}

.page-home .next-idx {
  display: block;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--gold-500);
}

.page-home .next-title-sm {
  margin: 14px 0 10px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -.015em;
  color: var(--warm-050);
  transition: color var(--dur) var(--ease);
}

.page-home .next-card:hover .next-title-sm,
.page-home .next-card:focus-visible .next-title-sm {
  color: var(--gold-300);
}

.page-home .next-card p {
  margin: 0 0 18px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-home .next-more {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--gold-500);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-home .hero-lead { font-size: 17px; }
  .page-home .read-modes { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 860px) {
  .page-home .hero-entries {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-home .entry {
    border-top: 1px solid var(--line-dark);
    border-bottom: 1px solid var(--line-dark);
    border-right: 1px solid var(--line-dark);
    padding: 20px 20px 22px 4px;
    height: 100%;
  }
  .page-home .hero-entries > li:first-child .entry { padding-left: 2px; }
  .page-home .hero-entries > li:last-child .entry { border-right: none; }
  .page-home .next-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .page-home .next-card { border-right: 1px solid var(--line-dark); }
  .page-home .next-grid > a:nth-child(even) { border-right: none; }
}

@media (min-width: 960px) {
  .page-home .hero-split {
    grid-template-columns: 260px minmax(0, 1fr);
    gap: clamp(40px, 6vw, 96px);
  }
  .page-home .hero-main { order: 2; }
  .page-home .hero-rail { order: 1; }
  .page-home .hero-title { line-height: 1; }
  .page-home .cd-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: clamp(36px, 5vw, 80px);
  }
  .page-home .case-grid {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
    gap: clamp(36px, 5vw, 72px);
  }
  .page-home .case-copy { order: 2; }
  .page-home .fig-slice { order: 1; position: sticky; top: calc(var(--header-h) + 32px); }
  .page-home .next-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .page-home .next-grid > a:nth-child(even) { border-right: 1px solid var(--line-dark); }
  .page-home .next-grid > a:last-child { border-right: none; }
  .page-home .next-card { padding: 30px 24px 34px; }
}

@media (min-width: 1180px) {
  .page-home .hero-rail { gap: 24px; }
  .page-home .rail-link { font-size: 15px; }
  .page-home .fact-list li { grid-template-columns: 92px minmax(0, 1fr); }
  .page-home .fact-num { font-size: 19px; }
}