.page-home {
  --home-scrim: linear-gradient(
    180deg,
    color-mix(in srgb, var(--color-surface) 62%, transparent) 0%,
    color-mix(in srgb, var(--color-surface) 84%, transparent) 50%,
    var(--color-surface) 100%
  );
  background-color: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  overflow-x: hidden;
}

.page-home h2 {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-3xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-primary-ink);
  margin: var(--space-2) 0 var(--space-3);
}

.page-home h3 {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-primary-ink);
  margin: 0;
}

.page-home .section--paper {
  color: var(--color-contrast-ink);
}

.page-home .section--paper h2 {
  color: var(--color-contrast-ink);
}

/* ---------- 封面首屏 ---------- */

.page-home .cover {
  position: relative;
  overflow: hidden;
  padding-top: var(--section-y-lg);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-home .cover__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-home .cover__bg img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
}

.page-home .cover__scrim {
  position: absolute;
  inset: 0;
  background: var(--home-scrim);
}

.page-home .cover__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
  padding-bottom: var(--space-6);
}

.page-home .cover__title {
  color: var(--color-primary-ink);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  margin: var(--space-3) 0;
  overflow-wrap: break-word;
}

.page-home .cover__lede {
  max-width: 46ch;
  margin: 0;
  color: var(--color-ink);
}

.page-home .cover__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-4);
  margin-top: var(--space-6);
  padding-top: var(--space-3);
  border-top: var(--border-thin) dashed var(--color-line);
}

.page-home .cover__meta-cell {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.page-home .cover__meta-key {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  color: var(--color-ink-soft);
}

.page-home .cover__meta-value {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  letter-spacing: 0.08em;
  color: var(--color-primary-ink);
}

.page-home .cover__seal {
  flex: none;
  width: 52px;
  height: 52px;
  margin-left: auto;
  color: var(--color-primary);
}

.page-home .cover__index {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding-top: var(--space-4);
  border-top: var(--border-thin) dashed var(--color-line);
}

.page-home .cover__index-head {
  margin-bottom: var(--space-1);
}

.page-home .cover__index-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-home .cover__index-item {
  padding: var(--space-2) 0;
  border-bottom: var(--border-thin) dotted var(--color-line);
}

.page-home .cover__index-item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-home .cover__index-link {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  color: var(--color-ink);
  text-decoration: none;
  transition: color 160ms ease-out;
}

.page-home .cover__index-link:hover,
.page-home .cover__index-link:focus-visible {
  color: var(--color-primary);
}

.page-home .cover__index-count {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.page-home .cover__index-note {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-xs);
  line-height: 1.7;
  color: var(--color-ink-soft);
}

.page-home .cover__foot {
  position: relative;
  z-index: 1;
  padding: var(--space-4) 0 var(--space-8);
}

.page-home .cover__scale {
  display: block;
  width: 100%;
  height: 20px;
  margin-bottom: var(--space-4);
  color: var(--color-primary);
}

.page-home .cover__figures {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-3);
}

.page-home .cover__figure {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding-left: var(--space-2);
  border-left: var(--border-thin) solid var(--color-line);
}

.page-home .cover__figure-value {
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--color-primary-ink);
}

.page-home .cover__figure-label {
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

/* ---------- 归档总览数字带 ---------- */

.page-home .band {
  border-bottom: var(--border-thin) dashed var(--color-line);
}

.page-home .band__head {
  max-width: var(--measure);
  margin-bottom: var(--space-8);
}

.page-home .band__lede {
  margin: 0;
  max-width: 52ch;
  color: var(--color-ink-soft);
}

.page-home .band__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
}

.page-home .band__metrics {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
}

.page-home .band__metric {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-3) var(--space-2) var(--space-3) var(--space-3);
  outline: none;
}

.page-home .band__metric::before {
  content: "";
  position: absolute;
  left: 0;
  top: var(--space-2);
  bottom: var(--space-2);
  width: 2px;
  background: var(--color-line);
  transition: width 160ms ease-out, background-color 160ms ease-out;
}

.page-home .band__metric:hover::before,
.page-home .band__metric:focus-visible::before {
  width: 4px;
  background: var(--color-primary);
}

.page-home .band__metric:hover,
.page-home .band__metric:focus-visible {
  background-color: var(--color-primary-soft);
}

.page-home .band__metric-value {
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  line-height: 1;
  letter-spacing: 0.01em;
  color: var(--color-primary-ink);
}

.page-home .band__metric-label {
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: var(--color-ink-soft);
}

.page-home .band__metric-hint {
  position: absolute;
  left: 0;
  top: 100%;
  z-index: 6;
  width: max-content;
  max-width: min(260px, 78vw);
  padding: var(--space-2);
  background-color: var(--color-surface-deep);
  border: var(--border-thin) solid var(--color-primary);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-1);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  line-height: 1.7;
  letter-spacing: 0;
  color: var(--color-ink);
  opacity: 0;
  visibility: hidden;
  transition: opacity 160ms ease-out, visibility 160ms ease-out;
}

.page-home .band__metric:hover .band__metric-hint,
.page-home .band__metric:focus-visible .band__metric-hint {
  opacity: 1;
  visibility: visible;
}

.page-home .band__media {
  margin: 0;
}

.page-home .band__media img {
  display: block;
  width: 100%;
  height: auto;
}

/* ---------- 三条主线 ---------- */

.page-home .lanes-sec__head {
  margin-bottom: var(--space-6);
}

.page-home .lanes {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
}

.page-home .lane {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-3) 0;
  border-top: var(--border-thin) dashed var(--color-line);
}

.page-home .lane--doc {
  padding: var(--space-4);
  background-color: var(--color-surface-deep);
  border: var(--border-thin) solid var(--color-primary);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1);
}

.page-home .lane__mark {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.24em;
  color: var(--color-primary);
}

.page-home .lane__name {
  font-size: var(--text-2xl);
}

.page-home .lane__stat {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: var(--color-ink-soft);
}

.page-home .lane__desc {
  margin: 0;
  max-width: 48ch;
  color: var(--color-ink);
}

.page-home .lane__desc a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-style: dotted;
  text-underline-offset: 3px;
}

.page-home .lane__desc a:hover,
.page-home .lane__desc a:focus-visible {
  color: var(--color-primary-ink);
}

.page-home .lane__meta {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-home .lane__link {
  align-self: flex-start;
  margin-top: var(--space-1);
  padding-bottom: 2px;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-primary);
  transition: color 160ms ease-out, border-color 160ms ease-out;
}

.page-home .lane__link:hover,
.page-home .lane__link:focus-visible {
  color: var(--color-primary-ink);
  border-color: var(--color-primary-ink);
}

/* ---------- 最近修订条目 ---------- */

.page-home .recents__banner {
  margin: 0 0 var(--space-8);
}

.page-home .recents__banner img {
  display: block;
  width: 100%;
  height: auto;
}

.page-home .recents__head {
  margin-bottom: var(--space-4);
}

.page-home .recents__list {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-home .exhibit {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-1) var(--space-3);
  padding: var(--space-3) var(--space-2) var(--space-3) var(--space-3);
  border-bottom: var(--border-thin) dashed var(--color-line);
  transition: background-color 160ms ease-out;
}

.page-home .exhibit:hover,
.page-home .exhibit:focus-within {
  background-color: var(--color-surface-alt);
}

.page-home .exhibit::before {
  content: "";
  position: absolute;
  left: 0;
  top: var(--space-3);
  bottom: var(--space-3);
  width: 2px;
  background: var(--color-line);
  transition: width 160ms ease-out, background-color 160ms ease-out;
}

.page-home .exhibit:hover::before,
.page-home .exhibit:focus-within::before {
  width: 4px;
  background: var(--color-primary);
}

.page-home .exhibit__id {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: var(--color-primary);
}

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

.page-home .exhibit__name {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-primary-ink);
}

.page-home .exhibit__meta {
  margin: var(--space-1) 0 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  line-height: 1.7;
  color: var(--color-ink-soft);
}

.page-home .exhibit__note {
  grid-column: 1 / -1;
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-muted);
}

.page-home .exhibit .status {
  justify-self: start;
}

/* ---------- 核验状态（浅色档案纸页） ---------- */

.page-home .verify {
  border-top: var(--border-thin) solid var(--color-contrast-line);
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}

.page-home .verify__head {
  max-width: var(--measure);
  margin-bottom: var(--space-6);
}

.page-home .verify__lede {
  margin: 0;
  color: var(--color-contrast-ink);
}

.page-home .verify__lede a {
  color: var(--color-contrast-accent);
  text-decoration: underline;
  text-decoration-style: dotted;
  text-underline-offset: 3px;
}

.page-home .verify__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

.page-home .verify__item {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-3) 0;
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}

.page-home .verify__text {
  margin: 0;
}

.page-home .verify__trace {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.02em;
  color: var(--color-contrast-accent);
}

/* ---------- 编纂口径与勘误 ---------- */

.page-home .covenant__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
}

.page-home .covenant__body p {
  margin: 0 0 var(--space-3);
}

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

.page-home .covenant__aside {
  padding: var(--space-4);
  background-color: var(--color-surface-deep);
  border: var(--border-thin) solid var(--color-primary);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1);
}

.page-home .covenant__aside-text {
  margin: var(--space-2) 0 var(--space-4);
  font-size: var(--text-sm);
  line-height: 1.8;
  color: var(--color-ink-soft);
}

.page-home .covenant__btn {
  text-decoration: none;
}

/* ---------- 收口带 ---------- */

.page-home .closing {
  padding-bottom: var(--section-y);
}

.page-home .closing__img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  opacity: 0.65;
}

/* ---------- 响应式 ---------- */

@media (min-width: 600px) {
  .page-home .band__metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 880px) {
  .page-home .cover__inner {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: var(--space-8);
    align-items: end;
    padding-bottom: var(--space-8);
  }

  .page-home .cover__index {
    padding-top: 0;
    padding-left: var(--space-4);
    border-top: 0;
    border-left: var(--border-thin) dashed var(--color-line);
  }

  .page-home .cover__index-note {
    max-height: 0;
    margin-top: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 180ms ease-out, opacity 180ms ease-out, margin-top 180ms ease-out;
  }

  .page-home .cover__index-item:hover .cover__index-note,
  .page-home .cover__index-item:focus-within .cover__index-note {
    max-height: 8em;
    margin-top: var(--space-1);
    opacity: 1;
  }

  .page-home .band__grid {
    grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr);
    gap: var(--space-8);
    align-items: start;
  }

  .page-home .lanes {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: var(--space-6) var(--gutter);
    align-items: start;
  }

  .page-home .lane--doc {
    grid-column: 1 / span 5;
  }

  .page-home .lane--yb {
    grid-column: 6 / span 7;
  }

  .page-home .lane--eq {
    grid-column: 6 / span 7;
  }

  .page-home .exhibit {
    grid-template-columns: 96px minmax(0, 1fr) auto;
    align-items: start;
  }

  .page-home .exhibit__note {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 180ms ease-out, opacity 180ms ease-out, margin-top 180ms ease-out;
  }

  .page-home .exhibit:hover .exhibit__note,
  .page-home .exhibit:focus-within .exhibit__note {
    max-height: 6em;
    margin-top: var(--space-1);
    opacity: 1;
  }

  .page-home .verify__item {
    grid-template-columns: 220px minmax(0, 1fr);
    column-gap: var(--space-4);
    align-items: start;
  }

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

  .page-home .covenant__grid {
    grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr);
    gap: var(--space-8);
    align-items: start;
  }
}

@media (min-width: 1100px) {
  .page-home .cover__figures {
    gap: var(--space-6);
  }
}

@media (max-width: 479px) {
  .page-home .cover__figures {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-2);
  }

  .page-home .cover__figure {
    flex-direction: row;
    align-items: baseline;
    gap: var(--space-2);
  }

  .page-home .cover__seal {
    margin-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home * {
    transition-duration: 0ms !important;
  }
}