/* ===== 首页 · 展览画册式纵向记录 ===== */
.page-home {
  --home-row-gap: clamp(2rem, 6vw, 3.5rem);
}

/* 首屏：目录式开篇 */
.page-home .home-hero {
  padding-top: clamp(1.25rem, 4vh, 3rem);
}
.page-home .home-hero__grid {
  row-gap: var(--home-row-gap);
  margin-top: clamp(1.5rem, 5vw, 2.75rem);
}
.page-home .home-hero__title {
  margin: .4rem 0 1.1rem;
  font-size: clamp(2rem, 6.2vw, 4.3rem);
  font-weight: 900;
  line-height: 1.07;
  letter-spacing: -.02em;
  color: var(--deep);
}
.page-home .home-hero__lead .note {
  margin-top: 1rem;
  max-width: 46ch;
}
.page-home .home-toc__heading {
  margin-bottom: .9rem;
}

/* 目录列表 */
.page-home .toc {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-strong);
}
.page-home .toc__item {
  border-bottom: 1px solid var(--line);
}
.page-home .toc__link {
  display: grid;
  grid-template-columns: 2.1rem minmax(0, 1fr) auto;
  align-items: baseline;
  column-gap: .8rem;
  padding: .95rem .25rem;
  color: var(--ink);
  text-decoration: none;
  transition: transform .18s ease-out, background-color .18s ease-out;
}
.page-home .toc__num {
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .04em;
  color: var(--slate);
  transition: color .18s ease-out;
}
.page-home .toc__body {
  display: block;
}
.page-home .toc__name {
  display: block;
  font-size: 1.06rem;
  font-weight: 700;
  color: var(--deep);
}
.page-home .toc__desc {
  display: block;
  margin-top: .28rem;
  font-size: .92rem;
  line-height: 1.65;
  color: var(--slate);
}
.page-home .toc__arrow {
  font-family: var(--font-mono);
  color: var(--gold);
  transition: transform .18s ease-out;
}
.page-home .toc__link:hover {
  transform: translateX(4px);
}
.page-home .toc__link:hover .toc__num {
  color: var(--gold);
}
.page-home .toc__link:hover .toc__arrow {
  transform: translateX(3px);
}

/* 本页小节跳转 */
.page-home .jump-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .3rem .55rem;
  margin: 1.1rem 0 0;
  font-size: .86rem;
  color: var(--slate);
}
.page-home .jump-row a {
  color: var(--deep);
  text-decoration: none;
  border-bottom: 1px solid var(--line-gold);
  padding-bottom: 1px;
  transition: color .18s ease-out;
}
.page-home .jump-row a:hover {
  color: var(--gold);
}

/* 等高线分隔带 */
.page-home .home-divide {
  line-height: 0;
}
.page-home .home-divide svg {
  display: block;
  width: 100%;
  height: clamp(34px, 5.5vw, 68px);
}

/* 第二章：同步窗口与六个区间 */
.page-home .home-network {
  color: var(--sand);
}
.page-home .home-network .section-title {
  color: var(--sand);
}
.page-home .home-network__lede {
  max-width: 62ch;
  margin: .9rem 0 0;
  font-size: 1.03rem;
  line-height: 1.85;
  color: var(--on-dark);
}
.page-home .home-network__figure {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .35rem .6rem;
  margin: clamp(1.2rem, 4vw, 2rem) 0 0;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line-gold);
}
.page-home .home-network__num {
  font-family: var(--font-mono);
  font-size: clamp(3.1rem, 11vw, 5.8rem);
  line-height: .88;
  letter-spacing: -.045em;
  color: var(--gold);
}
.page-home .home-network__unit {
  font-size: clamp(1rem, 2.6vw, 1.35rem);
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--sand);
}
.page-home .home-network__figure .note {
  flex: 1 1 15rem;
  margin: 0;
  color: var(--on-dark-soft);
}
.page-home .home-network__map {
  margin: clamp(1.6rem, 5vw, 2.5rem) 0 0;
}
.page-home .home-network__map .figure__frame {
  aspect-ratio: 16 / 9;
  border: 1px solid rgba(245, 239, 230, .2);
  border-radius: 8px;
  overflow: hidden;
}
.page-home .home-network__map img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.page-home .home-network .figure__cap {
  color: var(--on-dark-soft);
}

/* 横向区间面板 */
.page-home .geo-scroll {
  margin-top: clamp(1.6rem, 5vw, 2.5rem);
  gap: 14px;
  padding-bottom: 1rem;
}
.page-home .geo-item {
  scroll-snap-align: start;
  min-width: min(292px, 80vw);
  padding: 1.05rem 1.1rem 1.2rem;
  border: 1px solid rgba(245, 239, 230, .18);
  border-radius: 8px;
  background: linear-gradient(165deg, rgba(20, 72, 122, .55), rgba(7, 27, 48, .35));
  transition: border-color .18s ease-out, transform .2s ease-out;
}
.page-home .geo-item:hover {
  border-color: var(--line-gold);
  transform: translateY(-2px);
}
.page-home .geo-item__index {
  margin: 0;
  font-size: .74rem;
  letter-spacing: .16em;
  color: var(--on-dark-soft);
}
.page-home .geo-item__name {
  margin: .5rem 0 .5rem;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--sand);
}
.page-home .geo-item__text {
  margin: 0;
  font-size: .92rem;
  line-height: 1.72;
  color: var(--on-dark);
}
.page-home .home-network__tip {
  margin-top: .9rem;
  color: var(--on-dark-soft);
}

/* 第三章：四档规格 */
.page-home .home-specs__visual {
  margin-bottom: var(--home-row-gap);
}
.page-home .home-specs__figure {
  margin: 0;
}
.page-home .home-specs__figure .figure__frame {
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  overflow: hidden;
}
.page-home .home-specs__figure img {
  display: block;
  width: 100%;
  height: auto;
}
.page-home .home-specs__lede {
  max-width: 56ch;
  margin: .85rem 0 1.6rem;
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--slate);
}
.page-home .spec-ladder {
  list-style: none;
  margin: 0 0 1.75rem;
  padding: 0;
  border-bottom: 1px solid var(--line);
}
.page-home .spec-row {
  display: grid;
  grid-template-columns: 3.1rem minmax(0, 1fr);
  column-gap: .9rem;
  padding: 1.15rem .55rem 1rem;
  border-top: 1px solid var(--line);
  transition: background-color .18s ease-out;
}
.page-home .spec-row:hover,
.page-home .spec-row:focus-within {
  background-image: linear-gradient(90deg, rgba(212, 160, 23, .11), rgba(212, 160, 23, 0) 68%);
}
.page-home .spec-row__num {
  grid-column: 1;
  grid-row: 1 / span 4;
  padding-top: .22rem;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  letter-spacing: -.02em;
  color: var(--gold);
}
.page-home .spec-row__name,
.page-home .spec-row__line,
.page-home .spec-more {
  grid-column: 2;
}
.page-home .spec-row__name {
  margin: 0;
  font-size: clamp(1.32rem, 3.6vw, 1.7rem);
  font-weight: 900;
  letter-spacing: -.01em;
  color: var(--deep);
}
.page-home .spec-row__line {
  margin: .38rem 0 0;
  font-size: .98rem;
  line-height: 1.72;
  color: var(--ink);
}
.page-home .spec-more {
  margin: .35rem 0 0;
  font-size: .88rem;
  line-height: 1.7;
  color: var(--slate);
}

/* 第四章：两条入口 */
.page-home .home-routes .section-title {
  margin-bottom: .7rem;
}
.page-home .route-cards {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}
.page-home .route-card {
  display: block;
  padding: 1.25rem 1.2rem 1.35rem;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--linen);
  color: var(--ink);
  text-decoration: none;
  transition: transform .2s ease-out, border-color .18s ease-out;
}
.page-home .route-card:hover {
  transform: translateY(-3px);
  border-color: var(--line-gold);
}
.page-home .route-card--gold {
  border-color: var(--line-gold);
  background-image: linear-gradient(170deg, rgba(212, 160, 23, .13), rgba(245, 239, 230, .78));
}
.page-home .route-card__kicker {
  margin: 0;
  font-size: .76rem;
  letter-spacing: .14em;
  color: var(--slate);
}
.page-home .route-card__name {
  margin: .45rem 0 .55rem;
  font-size: 1.3rem;
  font-weight: 900;
  color: var(--deep);
}
.page-home .route-card__text {
  margin: 0;
  font-size: .95rem;
  line-height: 1.75;
  color: var(--ink);
}
.page-home .route-card__go {
  display: inline-block;
  margin-top: .9rem;
  font-size: .88rem;
  font-weight: 700;
  color: var(--gold);
}
.page-home .home-routes__visual {
  margin-top: var(--home-row-gap);
}
.page-home .home-routes__figure {
  margin: 0;
}
.page-home .home-routes__figure .figure__frame {
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}
.page-home .home-routes__figure img {
  display: block;
  width: 100%;
  height: auto;
}

/* 第五章：最近更新 */
.page-home .home-updates__head {
  max-width: 60ch;
}
.page-home .update-list {
  list-style: none;
  margin: clamp(1.5rem, 5vw, 2.25rem) 0 0;
  padding: 0;
  border-top: 1px solid var(--line-strong);
}
.page-home .update-item {
  border-bottom: 1px solid var(--line);
  transition: background-color .18s ease-out;
}
.page-home .update-item:hover {
  background-color: rgba(11, 42, 74, .04);
}
.page-home .update-item__link {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: start;
  gap: .55rem .9rem;
  padding: 1.1rem .45rem;
  color: var(--ink);
  text-decoration: none;
}
.page-home .update-item__tag {
  grid-column: 1 / -1;
  justify-self: start;
}
.page-home .update-item__body {
  display: block;
  min-width: 0;
}
.page-home .update-item__name {
  display: block;
  font-size: 1.04rem;
  font-weight: 700;
  color: var(--deep);
}
.page-home .update-item__text {
  display: block;
  margin-top: .3rem;
  font-size: .92rem;
  line-height: 1.72;
  color: var(--slate);
}
.page-home .update-item__go {
  color: var(--gold);
  transition: transform .18s ease-out;
}
.page-home .update-item__link:hover .update-item__go {
  transform: translateX(3px);
}

/* 收束视觉带 */
.page-home .home-strip {
  margin: 0;
}
.page-home .home-strip__frame {
  border-top: 1px solid var(--line-gold);
  border-bottom: 1px solid var(--line-gold);
  overflow: hidden;
}
.page-home .home-strip__frame img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
}
.page-home .home-strip .figure__cap {
  margin-top: .85rem;
  color: var(--slate);
}

/* 桌面端：锐化栅格与行距 */
@media (min-width: 900px) {
  .page-home .home-hero__lead {
    padding-right: 1rem;
  }
  .page-home .toc__link {
    padding: 1.05rem .5rem;
  }
  .page-home .spec-row {
    grid-template-columns: 3.6rem minmax(0, 1fr);
    column-gap: 1.1rem;
    padding: 1.35rem .8rem 1.15rem;
  }
  .page-home .route-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-home .home-routes__visual {
    margin-top: 0;
  }
  .page-home .update-item__link {
    grid-template-columns: 9rem minmax(0, 1fr) auto;
    align-items: baseline;
    padding: 1.2rem .5rem;
  }
  .page-home .update-item__tag {
    grid-column: 1;
  }
  .page-home .update-item__body {
    grid-column: 2;
  }
  .page-home .update-item__go {
    grid-column: 3;
  }
}

/* 精细指针下：规格摘要悬停与聚焦展开 */
@media (hover: hover) and (pointer: fine) {
  .page-home .spec-more {
    max-height: 0;
    margin-top: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height .22s ease-out, opacity .22s ease-out, margin-top .22s ease-out;
  }
  .page-home .spec-row:hover .spec-more,
  .page-home .spec-row:focus-within .spec-more {
    max-height: 7.5rem;
    margin-top: .35rem;
    opacity: 1;
  }
}

/* 降低动效偏好 */
@media (prefers-reduced-motion: reduce) {
  .page-home .toc__link,
  .page-home .toc__num,
  .page-home .toc__arrow,
  .page-home .geo-item,
  .page-home .spec-row,
  .page-home .spec-more,
  .page-home .route-card,
  .page-home .update-item,
  .page-home .update-item__go {
    transition: none;
  }
  .page-home .toc__link:hover,
  .page-home .geo-item:hover,
  .page-home .route-card:hover,
  .page-home .update-item__link:hover .update-item__go {
    transform: none;
  }
  .page-home .spec-more {
    max-height: none;
    margin-top: .35rem;
    opacity: 1;
  }
}