.page-home {
  --home-tilt: polygon(7% 0, 100% 0, 93% 100%, 0 100%);
  --home-line-strong: rgba(216, 210, 196, 1);
}

/* ---------- 首屏 ---------- */
.page-home .home-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(1.25rem, 3.6vw, 2.25rem) 0 clamp(2.75rem, 7vw, 5.5rem);
  background: var(--cream);
}

.page-home .home-hero::before {
  content: "";
  position: absolute;
  z-index: 0;
  top: -16%;
  right: -24%;
  width: min(80vw, 780px);
  height: 136%;
  background: linear-gradient(148deg, var(--blue-wash) 0%, var(--teal-wash) 54%, var(--orange-wash) 100%);
  clip-path: polygon(36% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-home .home-hero::after {
  content: "";
  position: absolute;
  z-index: 0;
  left: 0;
  bottom: 0;
  width: min(52vw, 420px);
  height: 5px;
  background: linear-gradient(90deg, var(--blue) 0%, var(--teal) 44%, var(--orange) 76%, var(--vermilion) 100%);
  pointer-events: none;
}

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

.page-home .hero-grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 2.75rem);
  margin-top: clamp(1rem, 2.6vw, 1.9rem);
}

.page-home .hero-copy h1 {
  margin: 0.5rem 0 0;
  font-size: clamp(2rem, 7vw, 3.55rem);
  line-height: 1.14;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ink);
  max-width: 18ch;
}

.page-home .hero-lede {
  margin: clamp(0.9rem, 2.2vw, 1.35rem) 0 0;
  max-width: 46ch;
  font-size: clamp(1rem, 1.15vw, 1.09rem);
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-home .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: clamp(1.25rem, 3vw, 1.9rem);
}

.page-home .hero-actions .btn {
  transition: transform 160ms var(--ease), background-color 160ms var(--ease), border-color 160ms var(--ease);
}

.page-home .hero-actions .btn:active {
  transform: translateY(1px) scale(0.985);
}

.page-home .hero-facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
  gap: 0.9rem 1.1rem;
  margin: clamp(1.75rem, 4vw, 2.6rem) 0 0;
  padding-top: 1.15rem;
  border-top: 1px solid var(--line);
}

.page-home .hero-fact dt {
  margin: 0 0 0.22rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--ink-faint);
}

.page-home .hero-fact dd {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
}

.page-home .hero-visual {
  position: relative;
  margin: 0;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--line);
  clip-path: var(--home-tilt);
}

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

@media (min-width: 880px) {
  .page-home .hero-grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    align-items: center;
    gap: clamp(2rem, 5vw, 3.75rem);
  }

  .page-home .hero-visual {
    aspect-ratio: 4 / 3;
  }
}

/* ---------- 资料岛 ---------- */
.page-home .home-island {
  padding: clamp(3rem, 7vw, 5.5rem) 0;
  background: var(--mist);
  border-top: 1px solid var(--line-soft);
}

.page-home .island-grid {
  display: grid;
  gap: clamp(1.25rem, 3vw, 1.9rem);
  margin-top: clamp(1.75rem, 4vw, 2.75rem);
}

@media (min-width: 860px) {
  .page-home .island-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
    gap: clamp(1.5rem, 3.4vw, 2.4rem);
  }

  .page-home .island-card--collect {
    margin-top: -1.6rem;
  }

  .page-home .island-card--export {
    margin-top: 1.6rem;
  }
}

.page-home .island-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  padding: clamp(1.1rem, 2.6vw, 1.7rem);
  transition: border-color 200ms var(--ease), box-shadow 200ms var(--ease), transform 200ms var(--ease);
}

.page-home .island-card--collect {
  border-top: 3px solid var(--teal);
}

.page-home .island-card--export {
  border-top: 3px solid var(--orange);
}

.page-home .island-card:hover {
  box-shadow: var(--shadow-float);
  transform: translateY(-3px);
}

.page-home .island-card--collect:hover {
  border-color: var(--teal);
}

.page-home .island-card--export:hover {
  border-color: var(--orange);
}

.page-home .island-card h3 {
  margin: 0.55rem 0 0;
  font-size: clamp(1.15rem, 2.2vw, 1.4rem);
  line-height: 1.35;
  font-weight: 700;
  color: var(--ink);
}

.page-home .island-card > p {
  margin: 0.7rem 0 0;
  font-size: 0.98rem;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-home .island-points {
  list-style: none;
  margin: 1.1rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.page-home .island-points li {
  position: relative;
  padding-left: 1.15rem;
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-home .island-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 0.42rem;
  height: 0.42rem;
  background: var(--teal);
  border-radius: 0;
}

.page-home .island-card--export .island-points li::before {
  background: var(--orange);
}

.page-home .island-figure {
  margin: 1.25rem 0 0;
  border: 1px solid var(--line-soft);
  background: var(--teal-gray);
  overflow: hidden;
}

.page-home .island-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  transition: transform 260ms var(--ease);
}

.page-home .island-card:hover .island-figure img {
  transform: scale(1.02);
}

.page-home .island-foot {
  margin: clamp(2rem, 4vw, 2.9rem) 0 0;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line);
  font-size: 0.96rem;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-home .inline-link {
  color: var(--blue);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid var(--blue-wash);
  transition: border-color 160ms var(--ease), color 160ms var(--ease);
}

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

/* ---------- BGV4 回访 ---------- */
.page-home .home-bgv4 {
  padding: clamp(3rem, 7vw, 5.5rem) 0;
  background: var(--cream);
  border-top: 1px solid var(--line-soft);
}

.page-home .bgv4-shell {
  display: grid;
  gap: clamp(1.9rem, 4vw, 3rem);
}

@media (min-width: 940px) {
  .page-home .bgv4-shell {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: center;
    gap: clamp(2.5rem, 5.5vw, 4rem);
  }
}

.page-home .bgv4-copy .section-lede {
  max-width: 48ch;
}

.page-home .path-steps {
  list-style: none;
  margin: clamp(1.4rem, 3vw, 2rem) 0 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}

.page-home .path-step {
  display: grid;
  grid-template-columns: 3.1rem minmax(0, 1fr);
  gap: 0.35rem 0.9rem;
  align-items: start;
  padding: clamp(0.9rem, 2.2vw, 1.2rem);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  transition: border-color 200ms var(--ease), transform 200ms var(--ease);
}

.page-home .path-step:hover {
  border-color: var(--teal);
  transform: translateX(4px);
}

.page-home .path-node {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--blue);
  letter-spacing: 0.02em;
}

.page-home .path-step:nth-child(2) .path-node {
  color: var(--orange);
}

.page-home .path-body h3 {
  margin: 0;
  font-size: 1.06rem;
  font-weight: 700;
  color: var(--ink);
}

.page-home .path-body p {
  margin: 0.32rem 0 0;
  font-size: 0.93rem;
  line-height: 1.72;
  color: var(--ink-soft);
}

.page-home .path-detail {
  margin-top: clamp(1.1rem, 2.6vw, 1.5rem);
  padding: 0.95rem 1.15rem;
  background: var(--orange-wash);
  border-left: 3px solid var(--orange);
  border-radius: var(--radius-card);
}

.page-home .path-detail summary {
  cursor: pointer;
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--ink);
  list-style: none;
}

.page-home .path-detail summary::-webkit-details-marker {
  display: none;
}

.page-home .path-detail summary::after {
  content: " +";
  font-family: var(--font-mono);
  color: var(--orange);
}

.page-home .path-detail[open] summary::after {
  content: " −";
}

.page-home .path-detail p {
  margin: 0.7rem 0 0;
  font-size: 0.93rem;
  line-height: 1.76;
  color: var(--ink-soft);
}

.page-home .bgv4-visual {
  margin: 0;
  padding: 0.6rem;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
}

.page-home .bgv4-visual img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 更新节奏 ---------- */
.page-home .home-cadence {
  padding: clamp(3rem, 7vw, 5.5rem) 0;
  background: var(--teal-gray);
  border-top: 1px solid var(--line-soft);
}

.page-home .home-timeline {
  margin: clamp(1.9rem, 4vw, 2.9rem) 0 0;
  display: grid;
  gap: clamp(1.2rem, 3vw, 1.9rem);
}

@media (min-width: 840px) {
  .page-home .home-timeline {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(1.4rem, 3vw, 2.4rem);
  }
}

.page-home .home-timeline .timeline-item {
  position: relative;
  padding-top: 1.4rem;
  border-top: 2px solid var(--line-strong);
  transition: border-color 200ms var(--ease);
}

.page-home .home-timeline .timeline-item:hover {
  border-top-color: var(--blue);
}

.page-home .home-timeline .timeline-item[data-state="return"]:hover {
  border-top-color: var(--orange);
}

.page-home .home-timeline .timeline-node {
  position: absolute;
  top: -6px;
  left: 0;
  width: 10px;
  height: 10px;
  border-radius: 0;
  background: var(--blue);
}

.page-home .home-timeline .timeline-item[data-state="return"] .timeline-node {
  background: var(--orange);
}

.page-home .home-timeline .timeline-time {
  margin: 0;
  color: var(--teal);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
}

.page-home .home-timeline h3 {
  margin: 0.5rem 0 0;
  font-size: clamp(1.06rem, 2vw, 1.24rem);
  font-weight: 700;
  color: var(--ink);
}

.page-home .home-timeline p:not(.timeline-time) {
  margin: 0.55rem 0 0;
  font-size: 0.94rem;
  line-height: 1.76;
  color: var(--ink-soft);
}

.page-home .cadence-link {
  margin: clamp(1.8rem, 4vw, 2.5rem) 0 0;
  font-size: 0.98rem;
}

/* ---------- 目录地图 ---------- */
.page-home .home-map {
  padding: clamp(3rem, 7vw, 5.5rem) 0 clamp(3.5rem, 8vw, 6rem);
  background: var(--cream);
  border-top: 1px solid var(--line-soft);
}

.page-home .map-list {
  margin: clamp(1.6rem, 3.6vw, 2.4rem) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-home .map-list .index-item {
  display: grid;
  grid-template-columns: 2.6rem minmax(0, 1fr);
  gap: 0.25rem 0.9rem;
  align-items: baseline;
  padding: clamp(0.85rem, 2.2vw, 1.15rem) 0.75rem;
  border-bottom: 1px solid var(--line-soft);
  transition: background-color 180ms var(--ease), border-bottom-color 180ms var(--ease);
}

.page-home .map-list .index-item:hover {
  background: var(--blue-wash);
  border-bottom-color: var(--blue);
}

.page-home .map-list .index-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
  transition: color 180ms var(--ease);
}

.page-home .map-list .index-item:hover .index-num {
  color: var(--blue);
}

.page-home .map-list .index-text a {
  display: inline-block;
  font-size: clamp(1.02rem, 2.1vw, 1.18rem);
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-home .map-list .index-item:hover .index-text a {
  color: var(--blue);
  border-bottom-color: var(--blue);
}

.page-home .map-list .index-text p {
  margin: 0.3rem 0 0;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-home .section-title {
  font-size: clamp(1.55rem, 3.6vw, 2.4rem);
  line-height: 1.22;
}

.page-home .mono-label {
  margin: 0;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--ink-faint);
}

@media (min-width: 720px) {
  .page-home .map-list .index-item {
    grid-template-columns: 3.4rem minmax(0, 1fr);
    gap: 0.3rem 1.4rem;
    padding-left: 1rem;
    padding-right: 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .island-card,
  .page-home .island-figure img,
  .page-home .path-step,
  .page-home .hero-actions .btn {
    transition: none;
  }

  .page-home .island-card:hover,
  .page-home .island-card:hover .island-figure img,
  .page-home .path-step:hover {
    transform: none;
  }
}

.page-home {
  --line-strong: currentColor;
}