.page-home {
  background: var(--paper);
  color: var(--indigo);
  overflow-x: clip;
}

.page-home a:focus-visible,
.page-home button:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}

.page-home .home-context {
  padding-top: clamp(14px, 2vw, 24px);
  padding-bottom: clamp(8px, 1.4vw, 14px);
}

.page-home .breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--gray-brown);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-home .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 8px;
  color: var(--rule);
}

.page-home .breadcrumb__item:last-child {
  color: var(--amber);
}

/* ---------- 首屏 ---------- */

.page-home .home-hero {
  position: relative;
  overflow: clip;
  padding: clamp(20px, 3vw, 40px) 0 clamp(48px, 7vw, 96px);
}

.page-home .home-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 44px);
  align-items: center;
}

.page-home .home-hero__copy {
  position: relative;
  z-index: 3;
}

.page-home .home-hero__kicker {
  font-family: var(--font-mono);
  font-size: var(--step-meta);
  letter-spacing: 0.14em;
  color: var(--celadon);
  margin: 0 0 14px;
}

.page-home .home-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--step-hero);
  line-height: 1.02;
  letter-spacing: -0.015em;
  margin: 0 0 16px;
}

.page-home .home-hero__lede {
  font-family: var(--font-body);
  font-size: clamp(1.05rem, 1.7vw, 1.35rem);
  line-height: 1.7;
  color: var(--indigo);
  margin: 0 0 14px;
  max-width: 24em;
}

.page-home .home-hero__intro {
  font-family: var(--font-body);
  font-size: var(--step-body);
  line-height: 1.85;
  color: var(--gray-brown);
  margin: 0 0 26px;
  max-width: 28em;
}

.page-home .home-hero__stats {
  list-style: none;
  margin: 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--rule);
  display: flex;
  flex-wrap: wrap;
  gap: 12px clamp(20px, 3vw, 36px);
}

.page-home .home-hero__stat {
  display: flex;
  align-items: baseline;
  gap: 7px;
}

.page-home .home-hero__stat b {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--amber);
}

.page-home .home-hero__stat span {
  font-size: var(--step-meta);
  letter-spacing: 0.04em;
  color: var(--gray-brown);
}

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

.page-home .home-hero__deep {
  position: absolute;
  right: -8%;
  top: -12%;
  width: 62%;
  height: 74%;
  background: var(--ink-deep);
  clip-path: polygon(0 12%, 100% 0, 95% 100%, 7% 86%);
  z-index: 0;
}

.page-home .home-hero__shard {
  position: relative;
  z-index: 1;
  margin: 0;
  overflow: hidden;
  min-height: clamp(230px, 34vw, 400px);
  background: linear-gradient(152deg, var(--indigo) 0%, var(--ink-deep) 100%);
  clip-path: polygon(7% 0, 100% 5%, 93% 100%, 0 95%);
}

.page-home .home-hero__shard img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.34;
  transform: rotate(-8deg) scale(1.22);
}

.page-home .home-hero__shard figcaption {
  position: absolute;
  left: clamp(22px, 6%, 52px);
  bottom: 20px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  color: var(--amber-light);
  background: rgba(15, 27, 51, 0.55);
  padding: 4px 9px;
}

/* ---------- 索引轴 ---------- */

.page-home .index-axis {
  grid-column: 1 / -1;
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding: 2px 0 6px;
  scrollbar-width: none;
}

.page-home .index-axis::-webkit-scrollbar {
  display: none;
}

.page-home .index-axis__node {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 13px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--gray-brown);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur-mid) var(--ease), border-color var(--dur-mid) var(--ease), background var(--dur-mid) var(--ease);
}

.page-home .index-axis__node::before {
  content: "";
  flex: 0 0 auto;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--rule);
  transition: background var(--dur-mid) var(--ease), box-shadow var(--dur-mid) var(--ease);
}

.page-home .index-axis__node .mono {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.06em;
  color: var(--amber);
}

.page-home .index-axis__node:hover {
  border-color: var(--amber);
  color: var(--indigo);
}

.page-home .index-axis__node.is-active,
.page-home .index-axis__node[aria-current="true"] {
  background: var(--amber-light);
  border-color: var(--amber);
  color: var(--ink-deep);
}

.page-home .index-axis__node.is-active::before,
.page-home .index-axis__node[aria-current="true"]::before {
  background: var(--amber);
  box-shadow: 0 0 0 3px rgba(200, 145, 47, 0.18);
}

/* ---------- 章节通用 ---------- */

.page-home .home-section {
  position: relative;
  padding: clamp(48px, 7vw, 92px) 0;
}

.page-home .home-section--ruled {
  border-top: 1px solid var(--rule);
}

.page-home .section__head {
  position: relative;
  z-index: 2;
  max-width: 46rem;
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-home .section__num {
  font-family: var(--font-mono);
  font-size: var(--step-meta);
  letter-spacing: 0.18em;
  color: var(--amber);
  margin: 0 0 10px;
}

.page-home .section__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--step-title);
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0 0 12px;
}

.page-home .section__lead {
  font-family: var(--font-body);
  font-size: var(--step-body);
  line-height: 1.85;
  color: var(--gray-brown);
  margin: 0;
  max-width: 30em;
}

.page-home .section__head::after {
  content: "";
  display: block;
  width: 18%;
  max-width: 110px;
  height: 3px;
  background: var(--amber);
  margin-top: 20px;
}

.page-home .home-topo {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: min(340px, 46%);
  fill: none;
  stroke: var(--celadon);
  stroke-width: 1.2;
  opacity: 0.11;
  pointer-events: none;
  z-index: 0;
}

.page-home .home-map {
  margin: 0 0 clamp(28px, 4vw, 42px);
}

.page-home .media-frame {
  position: relative;
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--glass);
}

.page-home .media-frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  opacity: 0.92;
}

.page-home .media-frame__caption {
  font-size: var(--step-meta);
  letter-spacing: 0.05em;
  color: var(--gray-brown);
  padding-top: 10px;
  background: var(--paper);
}

/* ---------- 筛选 ---------- */

.page-home .filter-bar {
  position: relative;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 12px;
}

.page-home .filter-chip {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--rule);
  background: transparent;
  color: var(--indigo);
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}

.page-home .filter-chip:hover {
  border-color: var(--amber);
}

.page-home .filter-chip[aria-pressed="true"],
.page-home .filter-chip.is-active {
  background: var(--amber-light);
  border-color: var(--amber);
  color: var(--ink-deep);
  font-weight: 700;
}

.page-home .filter-status {
  position: relative;
  z-index: 2;
  font-family: var(--font-mono);
  font-size: var(--step-meta);
  letter-spacing: 0.05em;
  color: var(--gray-brown);
  margin: 0 0 26px;
}

/* ---------- 分类卡片 ---------- */

.page-home .cat-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--gutter);
}

.page-home .cat-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 22px 18px;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  transition: transform var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}

.page-home .cat-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 0;
  height: 3px;
  background: var(--amber);
  transition: width var(--dur-slow) var(--ease);
}

.page-home .cat-card:hover {
  transform: translateY(-3px);
  border-color: var(--amber);
  box-shadow: var(--shadow-plate);
}

.page-home .cat-card:hover::before {
  width: 100%;
}

.page-home .cat-card__range {
  font-family: var(--font-mono);
  font-size: var(--step-meta);
  letter-spacing: 0.08em;
  color: var(--amber);
  margin: 0;
}

.page-home .cat-card__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: 0.01em;
  margin: 0;
}

.page-home .cat-card__desc {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--gray-brown);
  margin: 0;
}

.page-home .cat-card__foot {
  margin: auto 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--rule);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}

.page-home .cat-card__count {
  font-family: var(--font-mono);
  font-size: 1.375rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--indigo);
}

.page-home .cat-card__unit {
  font-size: var(--step-meta);
  letter-spacing: 0.05em;
  color: var(--gray-brown);
}

/* ---------- 常用入口 ---------- */

.page-home .entry-stack {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--gutter);
  align-items: start;
}

.page-home .entry-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 26px 24px 24px;
  border-radius: var(--radius);
  text-decoration: none;
  color: inherit;
  transition: transform var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}

.page-home .entry-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-plate);
}

.page-home .entry-card__num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--amber);
}

.page-home .entry-card__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.3rem;
  line-height: 1.3;
  margin: 0;
}

.page-home .entry-card__desc {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  line-height: 1.8;
  margin: 0;
  max-width: 26em;
}

.page-home .entry-card__go {
  margin-top: auto;
  padding-top: 18px;
  font-family: var(--font-display);
  font-size: 0.875rem;
  letter-spacing: 0.06em;
  display: inline-block;
  border-bottom: 1px solid currentColor;
  align-self: flex-start;
}

.page-home .entry-card--a {
  background: var(--indigo);
  border: 1px solid var(--indigo);
  color: var(--paper);
}

.page-home .entry-card--a .entry-card__num {
  color: var(--amber-light);
}

.page-home .entry-card--a .entry-card__desc {
  color: rgba(244, 239, 228, 0.78);
}

.page-home .entry-card--b,
.page-home .entry-card--c {
  background: transparent;
  border: 1px solid var(--rule);
}

.page-home .entry-card--b .entry-card__desc,
.page-home .entry-card--c .entry-card__desc {
  color: var(--gray-brown);
}

.page-home .entry-card--c .entry-card__num {
  color: var(--celadon);
}

/* ---------- 版本对照 ---------- */

.page-home .ver-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
  align-items: start;
}

.page-home .ver-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 22px 0;
  border-top: 1px solid var(--rule);
}

.page-home .ver-item:last-of-type {
  border-bottom: 1px solid var(--rule);
}

.page-home .ver-item__ver {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--amber);
  margin: 0;
}

.page-home .ver-item__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.125rem;
  margin: 0 0 8px;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.page-home .ver-item__desc {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--gray-brown);
  margin: 0;
  max-width: 28em;
}

.page-home .ver-bridge {
  margin-top: 26px;
  padding: 22px 22px 20px;
  background: var(--glass);
  border-radius: var(--radius);
  border-left: 3px solid var(--amber);
}

.page-home .ver-bridge__label {
  font-family: var(--font-mono);
  font-size: var(--step-meta);
  letter-spacing: 0.16em;
  color: var(--amber-light);
  margin: 0 0 12px;
}

.page-home .ver-bridge__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-home .ver-bridge__list li {
  position: relative;
  padding-left: 18px;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  line-height: 1.75;
  color: rgba(244, 239, 228, 0.86);
}

.page-home .ver-bridge__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 1px;
  background: var(--amber-light);
}

.page-home .ver-figure {
  background: var(--indigo);
}

/* ---------- 核对时间线 ---------- */

.page-home .timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 24px;
  border-left: 1px solid var(--rule);
}

.page-home .timeline__item {
  position: relative;
  padding: 0 0 clamp(24px, 3.5vw, 38px);
}

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

.page-home .timeline__item::before {
  content: "";
  position: absolute;
  left: -29px;
  top: 9px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 3px var(--paper);
}

.page-home .timeline__time {
  font-family: var(--font-mono);
  font-size: var(--step-meta);
  letter-spacing: 0.1em;
  color: var(--celadon);
  margin: 0 0 6px;
}

.page-home .timeline__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.0625rem;
  margin: 0 0 6px;
}

.page-home .timeline__desc {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--gray-brown);
  margin: 0;
  max-width: 30em;
}

/* ---------- 收藏与反馈 ---------- */

.page-home .home-section--keep {
  padding-bottom: clamp(40px, 6vw, 72px);
}

.page-home .keep-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 44px);
}

.page-home .keep-body__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.0625rem;
  margin: 0 0 8px;
}

.page-home .keep-body__text {
  font-family: var(--font-body);
  font-size: var(--step-body);
  line-height: 1.85;
  color: var(--gray-brown);
  margin: 0 0 22px;
  max-width: 28em;
}

.page-home .keep-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  padding-top: 18px;
  border-top: 1px solid var(--rule);
}

.page-home .keep-links a {
  font-family: var(--font-display);
  font-size: 0.875rem;
  letter-spacing: 0.05em;
  color: var(--indigo);
  text-decoration: none;
  border-bottom: 1px solid var(--amber);
  padding-bottom: 2px;
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}

.page-home .keep-links a:hover {
  color: var(--amber);
  border-color: var(--indigo);
}

.page-home .keep-side {
  padding: 24px 22px;
  border: 1px solid var(--rule);
  border-left: 3px solid var(--coral);
  border-radius: var(--radius);
  background: transparent;
}

.page-home .keep-side__label {
  font-family: var(--font-mono);
  font-size: var(--step-meta);
  letter-spacing: 0.16em;
  color: var(--coral);
  margin: 0 0 12px;
}

.page-home .keep-side__mail {
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  letter-spacing: 0.04em;
  color: var(--indigo);
  margin: 0 0 16px;
  word-break: break-all;
}

.page-home .copy-btn {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  padding: 8px 18px;
  border: 1px solid var(--coral);
  border-radius: 999px;
  background: transparent;
  color: var(--coral);
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}

.page-home .copy-btn:hover {
  background: var(--coral);
  color: var(--paper);
}

.page-home .keep-side__note {
  font-family: var(--font-body);
  font-size: var(--step-meta);
  line-height: 1.8;
  color: var(--gray-brown);
  margin: 16px 0 0;
}

.page-home .home-contour {
  margin: 0;
  line-height: 0;
}

.page-home .home-contour img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  opacity: 0.42;
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-home .cat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-home .home-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(32px, 4vw, 56px);
  }

  .page-home .index-axis {
    grid-column: 1 / -1;
    margin-top: 4px;
  }

  .page-home .entry-stack {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px;
  }

  .page-home .entry-card--a {
    min-height: 300px;
    padding-bottom: 36px;
  }

  .page-home .entry-card--b {
    margin-top: 46px;
    min-height: 254px;
  }

  .page-home .entry-card--c {
    margin-top: 92px;
    min-height: 214px;
  }

  .page-home .ver-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-home .ver-figure {
    margin-top: 58px;
  }

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

  .page-home .timeline__item {
    display: grid;
    grid-template-columns: 11rem minmax(0, 1fr);
    gap: 0 28px;
  }

  .page-home .timeline__time {
    margin-top: 4px;
  }
}

@media (min-width: 1000px) {
  .page-home .cat-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .page-home .cat-card:nth-child(1) { grid-column: span 5; }
  .page-home .cat-card:nth-child(2) { grid-column: span 4; }
  .page-home .cat-card:nth-child(3) { grid-column: span 3; }
  .page-home .cat-card:nth-child(4) { grid-column: span 4; }
  .page-home .cat-card:nth-child(5) { grid-column: span 5; }
  .page-home .cat-card:nth-child(6) { grid-column: span 3; }
  .page-home .cat-card:nth-child(7) { grid-column: span 6; }
  .page-home .cat-card:nth-child(8) { grid-column: span 3; }
  .page-home .cat-card:nth-child(9) { grid-column: span 3; }
}

@media (min-width: 1200px) {
  .page-home .home-hero__grid {
    grid-template-columns: 34px minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(20px, 2.4vw, 36px);
    align-items: start;
  }

  .page-home .index-axis {
    grid-column: 1;
    position: fixed;
    left: clamp(14px, 1.5vw, 30px);
    top: 50%;
    transform: translateY(-50%);
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    overflow: visible;
    padding: 0;
    margin: 0;
    z-index: 20;
    background: transparent;
  }

  .page-home .index-axis__node {
    border: none;
    border-radius: 0;
    padding: 0;
    background: transparent;
    font-size: 0.6875rem;
    letter-spacing: 0.08em;
  }

  .page-home .index-axis__node .mono {
    display: none;
  }

  .page-home .index-axis__node .index-axis__label {
    writing-mode: vertical-rl;
    letter-spacing: 0.18em;
    padding: 8px 0 8px 7px;
    border-left: 1px solid var(--rule);
    transition: border-color var(--dur-mid) var(--ease), color var(--dur-mid) var(--ease);
  }

  .page-home .index-axis__node.is-active .index-axis__label,
  .page-home .index-axis__node[aria-current="true"] .index-axis__label {
    border-color: var(--amber);
    color: var(--amber);
  }

  .page-home .index-axis__node.is-active,
  .page-home .index-axis__node[aria-current="true"] {
    background: transparent;
    color: var(--amber);
  }

  .page-home .home-hero__copy {
    grid-column: 2;
  }

  .page-home .home-hero__media {
    grid-column: 3;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .cat-card,
  .page-home .entry-card,
  .page-home .copy-btn,
  .page-home .index-axis__node,
  .page-home .cat-card::before,
  .page-home .index-axis__node::before {
    transition: none;
  }

  .page-home .cat-card:hover,
  .page-home .entry-card:hover {
    transform: none;
  }
}