.page-home {
  --ph-skew: 8deg;
  --ph-line-light: rgba(244, 241, 232, 0.18);
  position: relative;
  overflow-x: clip;
}

/* ---------- 首屏 / 章节预览 ---------- */

.page-home .home-intro {
  padding-top: clamp(28px, 5vw, 56px);
  padding-bottom: clamp(56px, 9vw, 120px);
}

.page-home .home-intro__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 56px);
  align-items: end;
  margin-top: clamp(20px, 3vw, 40px);
}

.page-home .home-intro__lead {
  min-width: 0;
}

.page-home .home-intro__title {
  margin: 0.12em 0 0;
  font-size: clamp(3rem, 12vw, 6.6rem);
  font-weight: 900;
  letter-spacing: -0.035em;
  line-height: 0.94;
  color: var(--green);
}

.page-home .home-intro__lede {
  margin: clamp(20px, 3vw, 32px) 0 0;
  max-width: 34em;
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  line-height: 1.78;
  color: rgba(20, 24, 26, 0.82);
}

.page-home .home-intro__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(18px, 2.6vw, 28px);
}

.page-home .home-intro__figure {
  position: relative;
  margin: 0;
  border: 2px solid var(--green);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  background: var(--green-deep);
}

.page-home .home-intro__figure img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 220px;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(0.72) contrast(1.04);
}

.page-home .tick-rule {
  height: 22px;
  margin-top: clamp(34px, 6vw, 64px);
  background-image:
    repeating-linear-gradient(to right, var(--line) 0, var(--line) 1px, transparent 1px, transparent 18px),
    repeating-linear-gradient(to right, var(--green) 0, var(--green) 2px, transparent 2px, transparent 90px);
  background-size: 100% 8px, 100% 22px;
  background-position: 0 100%, 0 100%;
  background-repeat: no-repeat, no-repeat;
}

.page-home .chapter-list {
  list-style: none;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
}

.page-home .chapter-list > li {
  border-top: 1px solid var(--line);
}

.page-home .chapter-list > li:last-child {
  border-bottom: 1px solid var(--line);
}

.page-home .chapter-link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: clamp(14px, 3vw, 34px);
  row-gap: 6px;
  align-items: baseline;
  padding: clamp(18px, 2.6vw, 28px) 0;
  color: inherit;
  text-decoration: none;
  transition: color 180ms var(--ease), transform 180ms var(--ease);
}

.page-home .chapter-link:hover,
.page-home .chapter-link:focus-visible {
  color: var(--green);
  transform: translateX(6px);
}

.page-home .chapter-num {
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: clamp(0.8rem, 1.2vw, 0.95rem);
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--orange);
  transition: color 180ms var(--ease);
}

.page-home .chapter-title {
  font-size: clamp(1.35rem, 3.4vw, 2.15rem);
  font-weight: 800;
  letter-spacing: -0.015em;
  line-height: 1.15;
}

.page-home .chapter-meta {
  font-size: clamp(0.82rem, 1.1vw, 0.9rem);
  line-height: 1.6;
  color: rgba(20, 24, 26, 0.6);
}

/* ---------- 通用小节标题 ---------- */

.page-home .home-section-title {
  margin: 0.4em 0 0;
  font-size: clamp(1.7rem, 4.2vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.16;
}

/* ---------- 档案刻度 ---------- */

.page-home .home-scale__head {
  max-width: 62ch;
}

.page-home .home-scale__lede {
  margin: clamp(16px, 2.4vw, 26px) 0 0;
  font-size: clamp(0.98rem, 1.4vw, 1.08rem);
  line-height: 1.8;
  color: rgba(244, 241, 232, 0.8);
}

.page-home .home-scale__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin-top: clamp(36px, 5vw, 60px);
}

.page-home .scale-cell {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(20px, 3vw, 30px) 0;
  border-bottom: 1px solid var(--ph-line-light);
}

.page-home .scale-num {
  font-family: var(--font-mono);
  font-size: clamp(2.2rem, 6.4vw, 3.6rem);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--paper);
}

.page-home .scale-unit {
  font-size: clamp(0.95rem, 1.4vw, 1.05rem);
  font-weight: 700;
  color: var(--orange);
}

.page-home .scale-note {
  font-size: 0.8125rem;
  line-height: 1.65;
  color: rgba(244, 241, 232, 0.62);
}

.page-home .home-scale__figure {
  margin: clamp(36px, 5vw, 56px) 0 0;
  border: 2px solid rgba(244, 241, 232, 0.3);
  background: var(--green-deep);
  overflow: hidden;
}

.page-home .home-scale__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-home .home-scale__figure figcaption {
  padding: clamp(14px, 2vw, 20px) clamp(16px, 2.4vw, 26px);
  font-size: 0.8125rem;
  line-height: 1.7;
  color: rgba(244, 241, 232, 0.7);
  border-top: 1px solid var(--ph-line-light);
}

/* ---------- 编年主脊 ---------- */

.page-home .home-timeline {
  position: relative;
  isolation: isolate;
}

.page-home .home-timeline__backdrop {
  position: absolute;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.page-home .home-timeline__backdrop img {
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: cover;
  opacity: 0.09;
  filter: grayscale(1) contrast(1.1);
}

.page-home .home-timeline__lede {
  margin: clamp(16px, 2.4vw, 26px) 0 0;
  max-width: 60ch;
  font-size: clamp(0.98rem, 1.4vw, 1.08rem);
  line-height: 1.8;
  color: rgba(20, 24, 26, 0.78);
}

.page-home .timeline {
  list-style: none;
  margin: clamp(36px, 5vw, 60px) 0 0;
  padding: 0 0 0 clamp(20px, 3vw, 34px);
  position: relative;
}

.page-home .timeline::before {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--silver) 0%, var(--silver) 100%);
}

.page-home .timeline__item {
  position: relative;
  padding: 0 0 clamp(28px, 4.4vw, 52px);
}

.page-home .timeline__item:last-child {
  padding-bottom: 0;
}

.page-home .timeline__item::before {
  content: "";
  position: absolute;
  top: 8px;
  left: calc(-1 * clamp(20px, 3vw, 34px) - 5px);
  width: 12px;
  height: 12px;
  background: var(--paper);
  border: 2px solid var(--silver);
  transition: background-color 200ms var(--ease), border-color 200ms var(--ease);
}

.page-home .timeline__item.is-active::before {
  background: var(--orange);
  border-color: var(--orange);
}

.page-home .timeline__year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: clamp(0.78rem, 1.1vw, 0.875rem);
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--green);
  padding: 2px 8px;
  background: var(--green-light);
}

.page-home .timeline__name {
  margin: 10px 0 0;
  font-size: clamp(1.15rem, 2.2vw, 1.5rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.25;
}

.page-home .timeline__desc {
  margin: 8px 0 0;
  max-width: 52ch;
  font-size: 0.9688rem;
  line-height: 1.78;
  color: rgba(20, 24, 26, 0.74);
}

/* ---------- 四条路径 ---------- */

.page-home .home-routes {
  position: relative;
}

.page-home .skew-seam {
  height: 6px;
  width: min(100%, 1180px);
  margin: 0 auto clamp(30px, 5vw, 62px);
  background: var(--orange);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 4% 100%);
}

.page-home .routes-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.4vw, 40px);
  margin-top: clamp(30px, 4.4vw, 52px);
}

.page-home .route-item {
  position: relative;
  padding: clamp(20px, 3vw, 30px) 0 0;
  border-top: 2px solid var(--green);
}

.page-home .route-item::after {
  content: "";
  position: absolute;
  top: -2px;
  left: 0;
  width: 58px;
  height: 6px;
  background: var(--orange);
  transform: skewX(-20deg);
}

.page-home .route-idx {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.page-home .route-title {
  margin: 10px 0 0;
  font-size: clamp(1.2rem, 2.4vw, 1.6rem);
  font-weight: 800;
  letter-spacing: -0.015em;
  line-height: 1.24;
}

.page-home .route-desc {
  margin: 10px 0 0;
  font-size: 0.9688rem;
  line-height: 1.8;
  color: rgba(20, 24, 26, 0.76);
}

.page-home .route-link {
  display: inline-block;
  margin-top: clamp(12px, 1.8vw, 18px);
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--blue);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color 160ms var(--ease);
}

.page-home .route-link:hover,
.page-home .route-link:focus-visible {
  border-bottom-color: var(--blue);
}

/* ---------- 口径与勘误 ---------- */

.page-home .home-caliber__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.4vw, 44px);
  margin-top: clamp(28px, 4vw, 48px);
}

.page-home .home-caliber__col p {
  margin: 0 0 1em;
  font-size: 0.9688rem;
  line-height: 1.8;
  color: rgba(244, 241, 232, 0.82);
}

.page-home .home-caliber__col p:last-child {
  margin-bottom: 0;
}

.page-home .home-caliber__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(18px, 2.6vw, 26px);
}

.page-home .home-caliber__note {
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding-top: clamp(16px, 2.4vw, 24px);
  border-top: 1px solid var(--ph-line-light);
  font-size: 0.8125rem;
  line-height: 1.7;
  color: rgba(244, 241, 232, 0.62);
}

.page-home .home-caliber .btn--solid {
  background: var(--orange);
  color: var(--green-deep);
  border-color: var(--orange);
}

.page-home .home-caliber .btn--ghost {
  color: var(--paper);
  border-color: rgba(244, 241, 232, 0.45);
}

/* ---------- 响应式 ---------- */

@media (min-width: 768px) {
  .page-home .home-intro__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

  .page-home .chapter-link {
    grid-template-columns: 3.5rem minmax(0, 1fr) minmax(0, 20rem);
    grid-template-areas: "num title meta";
    align-items: center;
  }

  .page-home .chapter-num {
    grid-area: num;
    grid-row: auto;
  }

  .page-home .chapter-title {
    grid-area: title;
  }

  .page-home .chapter-meta {
    grid-area: meta;
    text-align: right;
  }

  .page-home .home-scale__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(28px, 4vw, 52px);
  }

  .page-home .scale-cell {
    border-bottom: none;
    border-top: 1px solid var(--ph-line-light);
  }

  .page-home .routes-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(26px, 4vw, 52px);
  }

  .page-home .route-item--b {
    margin-top: clamp(16px, 3vw, 36px);
  }

  .page-home .home-caliber__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }
}

@media (min-width: 1024px) {
  .page-home .home-intro__lead {
    padding-left: clamp(0px, 3vw, 44px);
  }

  .page-home .home-intro__grid {
    grid-template-columns: minmax(0, 0.98fr) minmax(0, 1.02fr);
    gap: clamp(36px, 5vw, 72px);
  }

  .page-home .home-intro__figure {
    transform: skewY(calc(-1 * var(--ph-skew)));
  }

  .page-home .home-intro__figure img {
    transform: skewY(var(--ph-skew)) scale(1.12);
    transform-origin: center;
  }

  .page-home .home-scale__grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-home .scale-cell:nth-child(1) { grid-column: 1 / span 2; }
  .page-home .scale-cell:nth-child(2) { grid-column: 3 / span 2; }
  .page-home .scale-cell:nth-child(3) { grid-column: 5 / span 2; }
  .page-home .scale-cell:nth-child(4) { grid-column: 2 / span 2; }
  .page-home .scale-cell:nth-child(5) { grid-column: 4 / span 2; }

  .page-home .home-scale__figure {
    width: 62%;
    margin-left: auto;
  }

  .page-home .timeline {
    padding-left: clamp(26px, 3vw, 40px);
  }

  .page-home .timeline__item::before {
    left: calc(-1 * clamp(26px, 3vw, 40px) - 5px);
  }

  .page-home .routes-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    column-gap: clamp(24px, 3.4vw, 48px);
  }

  .page-home .route-item--a { grid-column: 1 / span 5; }
  .page-home .route-item--b {
    grid-column: 7 / span 6;
    margin-top: clamp(28px, 4vw, 64px);
  }
  .page-home .route-item--c {
    grid-column: 1 / span 6;
    margin-top: clamp(20px, 3vw, 44px);
  }
  .page-home .route-item--d {
    grid-column: 8 / span 5;
    margin-top: clamp(0px, 2vw, 24px);
  }

  .page-home .home-caliber__grid {
    gap: clamp(36px, 5vw, 72px);
  }

  .page-home .home-caliber__col:first-child {
    padding-right: clamp(0px, 2vw, 32px);
  }
}

@media (min-width: 1440px) {
  .page-home .home-intro__title {
    font-size: clamp(6rem, 7.2vw, 7rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .chapter-link,
  .page-home .timeline__item::before {
    transition: none;
  }

  .page-home .chapter-link:hover,
  .page-home .chapter-link:focus-visible {
    transform: none;
  }
}
</main>