.page-home {
  --home-gap: var(--space-3);
  --home-rule: 1px solid var(--color-line);
  background: var(--color-surface);
  color: var(--color-ink);
  overflow-x: clip;
}

/* ============ 首屏 ============ */
.page-home .hero {
  position: relative;
  padding-top: calc(var(--section-y) + var(--space-6));
  padding-bottom: var(--section-y);
  overflow: hidden;
  isolation: isolate;
}

.page-home .hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  right: 0;
  bottom: 0;
  width: min(62%, 660px);
  height: 58%;
  background: var(--color-primary-soft);
  clip-path: polygon(16% 0, 100% 0, 100% 100%, 0 100%);
}

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

.page-home .hero__eyebrow {
  margin: 0 0 var(--space-4);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  border-bottom: var(--home-rule);
  padding-bottom: var(--space-2);
}

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

.page-home .hero__title-main {
  display: block;
  font-size: var(--text-display);
  letter-spacing: 0.05em;
  color: var(--color-ink);
}

.page-home .hero__title-sub {
  display: block;
  font-size: var(--text-4xl);
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-top: var(--space-1);
}

.page-home .hero__lead {
  max-width: var(--measure);
  margin: var(--space-4) 0 0;
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-home .hero__figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
  margin: var(--space-6) 0 0;
  padding: var(--space-4) 0;
  list-style: none;
  border-top: var(--home-rule);
  border-bottom: var(--home-rule);
}

.page-home .hero__figures .key-figure {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.page-home .hero__figures .key-figure__num {
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  line-height: 0.94;
  color: var(--color-accent);
  letter-spacing: -0.02em;
}

.page-home .hero__figures .key-figure__label {
  font-size: var(--text-base);
  color: var(--color-ink);
}

.page-home .hero__figures .key-figure__meta {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.page-home .hero__split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-8);
}

.page-home .hero__rail-title,
.page-home .hero__panel-kicker {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}

.page-home .hero__rail-list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 var(--space-4);
  border-left: var(--home-rule);
  display: grid;
  gap: var(--space-2);
}

.page-home .hero__rail-link {
  position: relative;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  padding: 2px 0;
  text-decoration: none;
  color: var(--color-ink-soft);
  border-bottom: 1px dotted var(--color-line);
  transition: color 140ms linear;
}

.page-home .hero__rail-link::before {
  content: "";
  position: absolute;
  left: calc(var(--space-4) * -1 - 4px);
  top: 50%;
  width: 7px;
  height: 7px;
  transform: translateY(-50%);
  background: var(--color-surface);
  border: 1px solid var(--color-primary);
}

.page-home .hero__rail-list li:last-child .hero__rail-link {
  color: var(--color-ink);
}

.page-home .hero__rail-list li:last-child .hero__rail-link::before {
  background: var(--color-accent);
  border-color: var(--color-accent);
}

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

.page-home .hero__rail-id {
  font-size: var(--text-base);
  letter-spacing: 0.08em;
}

.page-home .hero__rail-year {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-home .hero__rail-note {
  margin: var(--space-3) 0 0;
  padding-left: var(--space-4);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-muted);
}

.page-home .hero__panel {
  display: grid;
  gap: var(--space-3);
  align-content: start;
  padding: var(--space-4);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-home .hero__panel-kicker {
  color: var(--color-contrast-accent);
}

.page-home .hero__panel-text {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
}

.page-home .hero__panel-figure {
  margin: 0;
}

.page-home .hero__panel-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-home .hero__panel-foot {
  margin: 0;
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-contrast-ink);
  border-top: 1px solid var(--color-contrast-line);
  padding-top: var(--space-2);
}

/* ============ 口径与边界 ============ */
.page-home .boundary {
  background: var(--color-surface-alt);
}

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

.page-home .boundary__title,
.page-home .versions__title,
.page-home .terminals__title,
.page-home .entries__title,
.page-home .updates__title,
.page-home .contact-out__title {
  margin: var(--space-2) 0 0;
  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-ink);
}

.page-home .boundary__prose {
  margin-top: var(--space-4);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-home .boundary__prose p + p {
  margin-top: var(--space-3);
}

.page-home .boundary__card {
  padding: var(--space-4);
  background: var(--color-surface);
}

.page-home .boundary__card-title {
  margin: 0 0 var(--space-3);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.page-home .boundary__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.page-home .boundary__list li {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: var(--space-2);
  align-items: start;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  padding-bottom: var(--space-2);
  border-bottom: 1px dotted var(--color-line);
}

.page-home .boundary__list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-home .boundary__list-id {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  padding-top: 3px;
}

/* ============ 版本时间线 ============ */
.page-home .versions {
  background: var(--color-surface);
}

.page-home .versions__head,
.page-home .terminals__head,
.page-home .entries__head,
.page-home .updates__head {
  max-width: var(--measure);
  margin-inline: auto;
  text-align: center;
}

.page-home .versions__intro,
.page-home .terminals__intro,
.page-home .entries__intro,
.page-home .updates__intro {
  margin: var(--space-3) 0 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-home .versions__banner,
.page-home .terminals__figure,
.page-home .updates__figure {
  margin: var(--space-6) 0 0;
}

.page-home .versions__banner img,
.page-home .terminals__figure img,
.page-home .updates__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-home .versions__list {
  position: relative;
  list-style: none;
  margin: var(--space-8) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-6);
}

.page-home .versions__list::before {
  content: "";
  position: absolute;
  left: 23px;
  top: var(--space-2);
  bottom: var(--space-2);
  width: 1px;
  background: var(--color-line);
}

.page-home .versions__item {
  position: relative;
  padding-left: 64px;
  scroll-margin-top: 120px;
}

.page-home .versions__marker {
  position: absolute;
  left: 0;
  top: 0;
  width: 48px;
  display: grid;
}

.page-home .versions__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-3);
  margin: 0 0 var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}

.page-home .versions__item-title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-home .versions__text {
  max-width: var(--measure);
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-home .versions__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-3);
  margin: var(--space-3) 0 0;
}

.page-home .versions__snap {
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-primary);
  padding-bottom: 1px;
}

.page-home .copy-btn {
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  padding: 5px var(--space-2);
  color: var(--color-ink-soft);
  background: var(--color-surface-alt);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background-color 140ms linear, color 140ms linear;
}

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

.page-home .copy-btn.is-copied {
  background: var(--color-highlight);
  color: var(--color-accent);
}

/* ============ 终端矩阵 ============ */
.page-home .terminals {
  background: var(--color-surface-alt);
}

.page-home .terminals__figure {
  max-width: 720px;
  margin-inline: auto;
}

.page-home .terminals__grid {
  margin-top: var(--space-6);
  display: grid;
  gap: 1px;
  background: var(--color-line);
  border: var(--border-thin) solid var(--color-line);
}

.page-home .terminals__row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
}

.page-home .terminals__row--head {
  display: none;
}

.page-home .terminals__label {
  grid-column: 1 / -1;
  padding: var(--space-2) var(--space-2);
  background: var(--color-surface-deep);
  font-family: var(--font-heading);
  font-size: var(--text-base);
  color: var(--color-ink);
}

.page-home .terminals__cell {
  display: flex;
  flex-direction: column;
  gap: 2px;
  align-items: flex-start;
  padding: var(--space-2);
  background: var(--color-surface-alt);
  transition: background-color 140ms linear;
}

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

.page-home .terminals__ver {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  letter-spacing: 0.08em;
}

.page-home .terminals__count {
  font-size: var(--text-lg);
  line-height: 1;
  color: var(--color-ink);
}

.page-home .terminals__state {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.page-home .terminals__corner,
.page-home .terminals__col {
  padding: var(--space-2);
  background: var(--color-surface-deep);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
  text-align: center;
}

.page-home .terminals__corner {
  text-align: left;
}

.page-home .terminals__foot {
  margin: var(--space-4) 0 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  border-top: var(--home-rule);
  padding-top: var(--space-3);
}

/* ============ 检索入口 ============ */
.page-home .entries {
  background: var(--color-surface);
}

.page-home .entries__bar {
  margin-top: var(--space-6);
  justify-content: center;
}

.page-home .entries__list {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-3);
}

.page-home .entries__card {
  display: grid;
  gap: var(--space-3);
  align-content: start;
  padding: var(--space-4);
  background: var(--color-surface-alt);
  border-top: 2px solid var(--color-primary);
}

.page-home .entries__card-head {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin: 0;
}

.page-home .entries__card-title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-home .entries__fields,
.page-home .entries__field-group {
  margin: 0;
  display: grid;
  gap: var(--space-2);
}

.page-home .entries__field {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: var(--space-2);
  padding-bottom: var(--space-2);
  border-bottom: 1px dotted var(--color-line);
}

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

.page-home .entries__field dt {
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-primary);
}

.page-home .entries__field dd {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-home .entries__foot {
  margin: var(--space-6) 0 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  border-top: var(--home-rule);
  padding-top: var(--space-3);
}

/* ============ 补录与更新 ============ */
.page-home .updates {
  background: var(--color-surface-alt);
}

.page-home .updates__latest {
  margin-top: var(--space-6);
  padding: var(--space-4);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-home .updates__latest-tag {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-contrast-accent);
}

.page-home .updates__latest-title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-contrast-ink);
}

.page-home .updates__latest-text {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
}

.page-home .updates__log {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-home .updates__log-item {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: var(--space-1) var(--space-3);
  padding: var(--space-3) 0;
  border-bottom: 1px dotted var(--color-line);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-home .updates__log-item:first-child {
  border-top: var(--home-rule);
}

.page-home .updates__log-id {
  font-size: var(--text-sm);
  color: var(--color-primary);
  letter-spacing: 0.08em;
}

.page-home .updates__log-count {
  font-size: var(--text-sm);
  color: var(--color-ink);
}

.page-home .updates__log-target,
.page-home .updates__log-scope {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

/* ============ 调阅与联系 ============ */
.page-home .contact-out {
  background: var(--color-surface);
}

.page-home .contact-out__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.page-home .contact-out__channel {
  padding: var(--space-4);
  background: var(--color-surface-alt);
  border-left: 3px solid var(--color-primary);
}

.page-home .contact-out__channel-tag {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}

.page-home .contact-out__channel-value {
  margin: 0 0 var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  color: var(--color-ink);
  overflow-wrap: anywhere;
}

.page-home .contact-out__channel-text {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-home .contact-out__note {
  margin: var(--space-4) 0 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-home .more-links {
  margin-top: var(--space-8);
  padding-top: var(--space-4);
  border-top: var(--home-rule);
}

.page-home .more-links__title {
  margin: 0 0 var(--space-3);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}

.page-home .more-links__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-2);
}

.page-home .more-links__list a {
  display: block;
  padding: var(--space-2) 0;
  font-size: var(--text-base);
  color: var(--color-ink);
  text-decoration: none;
  border-bottom: 1px dotted var(--color-line);
  transition: color 140ms linear;
}

.page-home .more-links__list a:hover,
.page-home .more-links__list a:focus-visible {
  color: var(--color-accent);
}

/* ============ 响应式 ============ */
@media (min-width: 700px) {
  .page-home .boundary__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--gutter);
    align-items: start;
  }

  .page-home .entries__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-4);
  }

  .page-home .contact-out__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-4);
  }

  .page-home .more-links__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-4);
  }

  .page-home .updates__log-item {
    grid-template-columns: 72px 120px minmax(0, 1fr) minmax(0, 1fr);
    align-items: baseline;
  }
}

@media (min-width: 820px) {
  .page-home .terminals__row {
    grid-template-columns: 116px repeat(6, minmax(0, 1fr));
  }

  .page-home .terminals__row--head {
    display: grid;
  }

  .page-home .terminals__label {
    grid-column: auto;
    display: flex;
    align-items: center;
    padding: var(--space-3) var(--space-2);
    font-size: var(--text-base);
  }

  .page-home .terminals__cell {
    padding: var(--space-3) var(--space-2);
    min-height: 96px;
  }
}

@media (min-width: 900px) {
  .page-home .hero {
    padding-top: calc(var(--section-y-lg) + var(--space-4));
    padding-bottom: var(--section-y-lg);
  }

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

  .page-home .hero__split {
    grid-template-columns: minmax(0, 4fr) minmax(0, 6fr);
    gap: var(--gutter);
    align-items: start;
  }

  .page-home .versions__list::before {
    left: 31px;
  }

  .page-home .versions__item {
    padding-left: 104px;
  }

  .page-home .versions__marker {
    width: 62px;
  }

  .page-home .versions__item-title {
    font-size: var(--text-xl);
  }

  .page-home .updates__log-item {
    grid-template-columns: 88px 132px minmax(0, 1fr) minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .copy-btn,
  .page-home .hero__rail-link,
  .page-home .more-links__list a,
  .page-home .terminals__cell {
    transition: none;
  }
}