.page-home {
  --home-glow-cool: rgba(53, 214, 224, .16);
  --home-glow-warm: rgba(227, 178, 90, .14);
  --home-shell-pad: max(var(--gutter), calc((100vw - var(--shell-max)) / 2));

  display: block;
  position: relative;
  background:
    radial-gradient(1100px 620px at 6% -8%, var(--home-glow-cool), transparent 62%),
    radial-gradient(880px 540px at 98% 2%, var(--home-glow-warm), transparent 58%),
    var(--deep-space);
  color: var(--text);
}

/* ---------- 首屏 ---------- */

.page-home .hero {
  position: relative;
  padding: clamp(2.25rem, 6vw, 4.5rem) 0 clamp(2rem, 5vw, 3.5rem);
  overflow: hidden;
}

.page-home .hero::before {
  content: "";
  position: absolute;
  inset: -22% -12% auto -22%;
  height: 80%;
  background:
    linear-gradient(118deg, rgba(53, 214, 224, .18) 0%, rgba(11, 124, 140, .10) 34%, transparent 64%);
  clip-path: polygon(0 0, 68% 0, 44% 100%, 0 86%);
  pointer-events: none;
}

.page-home .hero::after {
  content: "";
  position: absolute;
  inset: auto -14% -20% 40%;
  height: 64%;
  background: linear-gradient(302deg, rgba(227, 178, 90, .16), transparent 60%);
  clip-path: polygon(28% 0, 100% 14%, 100% 100%, 0 100%);
  pointer-events: none;
}

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

.page-home .hero .breadcrumb {
  margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
}

.page-home .hero-inner {
  display: grid;
  gap: clamp(1.75rem, 5vw, 3rem);
}

.page-home .hero-copy .eyebrow {
  margin-bottom: .85rem;
}

.page-home .hero-copy h1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2rem, 6.4vw, 4.25rem);
  line-height: 1.14;
  letter-spacing: -.01em;
  margin: 0 0 1.1rem;
  color: var(--text);
}

.page-home .hero-copy .lede {
  max-width: 46ch;
  color: var(--muted);
  margin: 0;
}

.page-home .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 1.6rem;
}

.page-home .hero-visual {
  margin: 0;
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-glass);
  background: var(--abyss);
}

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

/* ---------- 三条路径 ---------- */

.page-home .path-deck {
  display: grid;
  gap: 1rem;
  margin-top: clamp(2rem, 5vw, 3.25rem);
}

.page-home .path-card {
  position: relative;
  display: grid;
  gap: .5rem;
  padding: 1.6rem 1.4rem 1.4rem 1.7rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--text);
  text-decoration: none;
  transition: border-color .3s var(--ease), background .3s var(--ease), box-shadow .3s var(--ease);
}

.page-home .path-card::before {
  content: "";
  position: absolute;
  top: 1.55rem;
  bottom: 1.55rem;
  left: 0;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: var(--cyan);
  opacity: .55;
  transition: opacity .3s var(--ease);
}

.page-home .path-card--warm::before {
  background: var(--gold);
}

.page-home .path-card--paper::before {
  background: var(--paper);
}

.page-home .path-card:hover,
.page-home .path-card:focus-visible {
  border-color: var(--line-strong);
  background: var(--glass-high);
  box-shadow: var(--shadow-glass);
}

.page-home .path-card:hover::before,
.page-home .path-card:focus-visible::before {
  opacity: 1;
}

.page-home .path-index {
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .12em;
  color: var(--muted-dim);
}

.page-home .path-title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.35rem;
  line-height: 1.3;
  color: var(--text);
}

.page-home .path-text {
  font-size: .95rem;
  line-height: 1.72;
  color: var(--muted);
}

.page-home .path-go {
  margin-top: .35rem;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-home .path-card--warm .path-go {
  color: var(--gold);
}

.page-home .path-card--paper .path-go {
  color: var(--paper);
}

/* ---------- 横向索引带 ---------- */

.page-home .band-outer {
  padding: clamp(2.25rem, 5vw, 3.5rem) 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(14, 21, 38, .9), rgba(7, 11, 24, .4));
}

.page-home .band-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: .5rem 1.5rem;
  margin-bottom: 1.4rem;
}

.page-home .band-head .section-title {
  margin: 0;
}

.page-home .band-head .annotation {
  margin: 0;
}

.page-home .band-track {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(228px, 76vw);
  gap: 1rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  padding: .25rem var(--home-shell-pad) 1.4rem;
  scrollbar-width: thin;
  scrollbar-color: var(--line-strong) transparent;
}

.page-home .band-track::-webkit-scrollbar {
  height: 6px;
}

.page-home .band-track::-webkit-scrollbar-thumb {
  background: var(--line-strong);
  border-radius: 3px;
}

.page-home .band-cell {
  scroll-snap-align: start;
  padding: 1.45rem 1.3rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: linear-gradient(158deg, rgba(18, 168, 184, .16), rgba(14, 21, 38, .92) 66%);
  transition: border-color .3s var(--ease);
}

.page-home .band-cell:hover {
  border-color: var(--cyan);
}

.page-home .band-label {
  margin: 0 0 .6rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--muted-dim);
}

.page-home .band-value {
  margin: 0 0 .65rem;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.6rem;
  line-height: 1.2;
  color: var(--paper);
}

.page-home .band-note {
  margin: 0;
  font-size: .88rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 章节通用 ---------- */

.page-home .chapter {
  padding: clamp(2.5rem, 6vw, 4.5rem) 0;
}

.page-home .chapter-grid {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.75rem);
  align-items: center;
}

.page-home .chapter-label {
  margin: 0 0 .75rem;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .14em;
  color: var(--muted-dim);
}

.page-home .chapter-body .section-title,
.page-home .formal-head .section-title {
  margin: 0 0 1rem;
}

.page-home .chapter-body p {
  margin: 0 0 1.1rem;
  color: var(--muted);
  line-height: 1.78;
}

.page-home .chapter-art {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
}

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

.page-home .mini-list {
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
  display: grid;
  gap: .7rem;
}

.page-home .mini-list li {
  position: relative;
  padding-left: 1.15rem;
  font-size: .95rem;
  line-height: 1.72;
  color: var(--text);
}

.page-home .mini-list li::before {
  content: "";
  position: absolute;
  top: .68em;
  left: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  opacity: .7;
}

/* HD 区块 */

.page-home .chapter--hd {
  background: linear-gradient(180deg, rgba(11, 124, 140, .18), rgba(7, 11, 24, 0) 76%);
  border-bottom: 1px solid var(--line);
}

.page-home .chapter--hd .chapter-label {
  color: var(--cyan);
}

.page-home .chapter--hd .mini-list {
  color: var(--cyan-light);
}

.page-home .chapter--hd .mini-list li {
  color: var(--text);
}

/* 桌面端区块 */

.page-home .chapter--warm {
  background: linear-gradient(202deg, rgba(227, 178, 90, .15), rgba(7, 11, 24, 0) 72%);
}

.page-home .chapter--warm .chapter-label {
  color: var(--gold);
}

.page-home .chapter--warm .mini-list li::before {
  background: var(--gold);
}

/* 正式版区块 */

.page-home .chapter--formal {
  background: linear-gradient(180deg, rgba(16, 39, 92, .34), rgba(7, 11, 24, .1) 84%);
  border-top: 1px solid var(--line);
}

.page-home .formal-head {
  max-width: 62ch;
  margin-bottom: clamp(1.6rem, 4vw, 2.4rem);
}

.page-home .formal-head .chapter-label {
  color: var(--paper);
}

.page-home .formal-head p {
  margin: 0;
  color: var(--muted);
  line-height: 1.78;
}

.page-home .diff {
  display: grid;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--abyss);
}

.page-home .diff-head,
.page-home .diff-row {
  display: grid;
  grid-template-columns: minmax(96px, 1.1fr) minmax(0, 1fr) minmax(0, 1fr);
  gap: .5rem;
  padding: .95rem 1rem;
  font-size: .875rem;
  line-height: 1.6;
}

.page-home .diff-head {
  background: var(--formal-blue);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
}

.page-home .diff-row + .diff-row {
  border-top: 1px solid var(--line);
}

.page-home .diff-row:hover {
  background: rgba(53, 214, 224, .06);
}

.page-home .diff-key {
  color: var(--paper);
  font-weight: 500;
}

.page-home .diff-row > span:not(.diff-key):not(.diff-formal) {
  color: var(--muted);
}

.page-home .diff-formal {
  color: var(--paper);
}

.page-home .formal-art {
  margin: clamp(1.6rem, 4vw, 2.4rem) 0 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
}

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

.page-home .formal-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: clamp(1.4rem, 3.5vw, 2rem);
}

/* ---------- 固定访问入口 ---------- */

.page-home .access {
  padding: clamp(2.5rem, 6vw, 4rem) 0;
}

.page-home .access-panel {
  display: grid;
  gap: 1.5rem;
  padding: clamp(1.7rem, 4.5vw, 2.75rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-glass);
}

.page-home .access-copy .chapter-label {
  color: var(--cyan);
}

.page-home .access-copy .section-title {
  margin: 0 0 1rem;
}

.page-home .access-copy p {
  margin: 0;
  max-width: 62ch;
  color: var(--muted);
  line-height: 1.78;
}

.page-home .access-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  align-self: end;
}

/* ---------- 服务基点 ---------- */

.page-home .base-strip {
  padding: clamp(2.5rem, 6vw, 4rem) 0 clamp(3rem, 6vw, 4.5rem);
  border-top: 1px solid var(--line);
}

.page-home .base-grid {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.75rem);
  align-items: start;
}

.page-home .base-copy .section-title {
  margin: 0 0 1rem;
}

.page-home .base-copy p {
  margin: 0 0 1.5rem;
  max-width: 54ch;
  color: var(--muted);
  line-height: 1.78;
}

.page-home .base-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
}

.page-home .base-facts {
  display: grid;
  gap: 0;
  margin: 0;
  border-top: 1px solid var(--line);
}

.page-home .fact {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: .35rem 1rem;
  padding: .95rem .25rem;
  border-bottom: 1px solid var(--line);
}

.page-home .fact dt {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--muted-dim);
}

.page-home .fact dd {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--paper);
}

/* ---------- 响应式 ---------- */

@media (min-width: 680px) {
  .page-home .path-deck {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-home .access-panel {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
  }
}

@media (min-width: 900px) {
  .page-home .hero-inner {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    align-items: center;
  }

  .page-home .hero-copy {
    grid-column: 2;
    grid-row: 1;
  }

  .page-home .hero-visual {
    grid-column: 1;
    grid-row: 1;
  }

  .page-home .chapter-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  }

  .page-home .chapter-grid--flip {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  }

  .page-home .chapter-grid--flip .chapter-body {
    order: 2;
  }

  .page-home .chapter-grid--flip .chapter-art {
    order: 1;
  }

  .page-home .band-track {
    grid-auto-columns: minmax(250px, 1fr);
  }

  .page-home .base-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
}

@media (min-width: 1040px) {
  .page-home .path-deck {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .path-card,
  .page-home .path-card::before,
  .page-home .band-cell {
    transition: none;
  }

  .page-home .band-track {
    scroll-behavior: auto;
  }
}