.page-home {
  display: block;
  background: var(--color-surface);
  color: var(--color-ink);
}

/* ================= 首屏 ================= */
.page-home .hero {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding-block: var(--space-8) var(--space-8);
}

.page-home .hero::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 34%;
  background: var(--color-accent);
  clip-path: polygon(0 62%, 100% 0, 100% 100%, 0 100%);
  z-index: 0;
}

.page-home .hero__texture {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.13;
  z-index: 1;
  pointer-events: none;
}

.page-home .hero__inner {
  position: relative;
  z-index: 2;
  display: grid;
  gap: var(--space-6);
}

.page-home .hero__kicker {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin: 0 0 var(--space-3);
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  color: var(--color-contrast-ink);
}

.page-home .hero__kicker-id {
  display: inline-block;
  padding: 2px var(--space-1);
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-sm);
  color: var(--color-contrast-accent);
  letter-spacing: 0.06em;
}

.page-home .hero__kicker-text {
  color: color-mix(in srgb, var(--color-contrast-ink) 72%, transparent);
}

.page-home .hero__title {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-display);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
  word-break: keep-all;
}

.page-home .hero__title-sub {
  display: block;
  color: var(--color-primary);
  -webkit-text-stroke: 0;
}

.page-home .hero__lede {
  max-width: var(--measure);
  margin: 0 0 var(--space-4);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 84%, transparent);
}

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

.page-home .hero__textlink {
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-contrast-accent);
  padding-bottom: 2px;
}

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

.page-home .hero__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  align-self: center;
}

.page-home .hero__stat {
  position: relative;
  padding: var(--space-2) 0 var(--space-2) var(--space-3);
  border-bottom: var(--border-thin) solid color-mix(in srgb, var(--color-primary-ink) 36%, transparent);
}

.page-home .hero__stat:first-child {
  border-top: var(--border-thin) solid color-mix(in srgb, var(--color-primary-ink) 36%, transparent);
}

.page-home .hero__stat::before {
  content: "";
  position: absolute;
  left: 0;
  top: var(--space-3);
  width: 3px;
  height: 18px;
  background: var(--color-primary-ink);
}

.page-home .hero__stat-num {
  display: block;
  font-size: var(--text-2xl);
  line-height: 1;
  letter-spacing: -0.05em;
  color: var(--color-primary-ink);
}

.page-home .hero__stat-label {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  color: color-mix(in srgb, var(--color-primary-ink) 78%, transparent);
}

/* ================= 四季分区 ================= */
.page-home .seasons__head {
  margin-bottom: var(--space-6);
}

.page-home .seasons__intro {
  max-width: var(--measure);
  margin: var(--space-2) 0 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

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

.page-home .season-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-3);
  border: var(--border-thin) solid var(--color-ink);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: var(--shadow-1);
}

.page-home .season-card--spring {
  background: var(--color-primary-soft);
}

.page-home .season-card--summer {
  background: var(--color-accent);
  color: var(--color-accent-ink);
}

.page-home .season-card--autumn {
  background: var(--color-primary);
  color: var(--color-primary-ink);
}

.page-home .season-card--winter {
  background: var(--color-surface-deep);
}

.page-home .season-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.page-home .season-card__range {
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  opacity: 0.78;
}

.page-home .season-card__figure {
  margin: 0;
}

.page-home .season-card__figure .figure__media {
  aspect-ratio: 3 / 2;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: var(--border-thin) solid color-mix(in srgb, var(--color-ink) 26%, transparent);
}

.page-home .season-card__figure .figure__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-home .season-card__title {
  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);
}

.page-home .season-card__desc {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
}

.page-home .season-card__meta {
  margin: auto 0 0;
  padding-top: var(--space-2);
  border-top: var(--border-thin) solid currentColor;
  display: grid;
  gap: calc(var(--space-1) / 2);
  opacity: 0.86;
}

.page-home .season-card__meta-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
}

.page-home .season-card__meta-row dt,
.page-home .season-card__meta-row dd {
  margin: 0;
}

.page-home .season-card__link {
  align-self: flex-start;
  font-size: var(--text-sm);
  font-weight: 700;
  color: inherit;
  text-decoration: none;
  border-bottom: var(--border-thin) solid currentColor;
}

.page-home .season-card__link:hover,
.page-home .season-card__link:focus-visible {
  opacity: 0.72;
}

/* ================= 编号索引带 ================= */
.page-home .index-band {
  background: var(--color-surface-alt);
  position: relative;
}

.page-home .index-band__grid {
  display: grid;
  gap: var(--space-6);
}

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

.page-home .index-band__lead p {
  margin: 0 0 var(--space-3);
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-home .index-band__more {
  display: inline-block;
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-accent);
  padding-bottom: 2px;
}

.page-home .index-band__figure {
  margin: 0;
}

.page-home .index-band__figure .figure__media {
  border: var(--border-thin) solid var(--color-ink);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-surface);
  box-shadow: var(--shadow-1);
}

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

.page-home .index-band__figure .figure__cap {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}

.page-home .cat-strip {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-2);
}

.page-home .cat-chip {
  display: grid;
  gap: calc(var(--space-1) / 2);
  place-items: center;
  padding: var(--space-2) var(--space-1);
  border: var(--border-thin) solid var(--color-ink);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  text-decoration: none;
  color: var(--color-ink);
  box-shadow: var(--shadow-1);
  transition: transform 160ms cubic-bezier(0.22, 0.61, 0.36, 1),
    box-shadow 160ms cubic-bezier(0.22, 0.61, 0.36, 1);
}

.page-home .cat-chip:hover,
.page-home .cat-chip:focus-visible {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-2);
}

.page-home .cat-chip__num {
  font-size: var(--text-xl);
  line-height: 1;
  letter-spacing: -0.04em;
}

.page-home .cat-chip__tag {
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-ink-soft);
}

.page-home .cat-chip--spring {
  background: var(--color-primary-soft);
}

.page-home .cat-chip--summer {
  background: var(--color-accent);
  color: var(--color-accent-ink);
}

.page-home .cat-chip--summer .cat-chip__tag {
  color: color-mix(in srgb, var(--color-accent-ink) 76%, transparent);
}

.page-home .cat-chip--autumn {
  background: var(--color-primary);
  color: var(--color-primary-ink);
}

.page-home .cat-chip--autumn .cat-chip__tag {
  color: color-mix(in srgb, var(--color-primary-ink) 76%, transparent);
}

.page-home .cat-chip--winter {
  background: var(--color-surface-deep);
}

/* ================= 修订时间轴 ================= */
.page-home .revisions {
  position: relative;
  overflow: hidden;
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-home .revisions__texture {
  position: absolute;
  top: 0;
  right: 0;
  width: 48%;
  height: 100%;
  object-fit: cover;
  opacity: 0.16;
  pointer-events: none;
}

.page-home .revisions__head {
  position: relative;
  z-index: 1;
  margin-bottom: var(--space-6);
}

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

.page-home .revisions__head p {
  margin: var(--space-2) 0 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 78%, transparent);
}

.page-home .revisions__track {
  position: relative;
  z-index: 1;
  list-style: none;
  display: flex;
  gap: var(--space-3);
  margin: 0;
  padding: 0 var(--gutter) var(--space-3);
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-home .revisions__node {
  flex: 0 0 78%;
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-3);
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-lg);
  background: color-mix(in srgb, var(--color-contrast-ink) 7%, transparent);
}

.page-home .revisions__step {
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-contrast-accent);
}

.page-home .revisions__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);
}

.page-home .revisions__desc {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 80%, transparent);
}

.page-home .revisions__outcome {
  margin: auto 0 0;
  padding-top: var(--space-2);
  border-top: var(--border-thin) solid var(--color-contrast-line);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
}

/* ================= 栏目入口带 ================= */
.page-home .lanes__head {
  margin-bottom: var(--space-6);
}

.page-home .lanes__head p {
  margin: var(--space-2) 0 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-home .lanes__grid {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: 1fr;
}

.page-home .lane {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-3);
  text-decoration: none;
  border: var(--border-thin) solid var(--color-ink);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-2);
  transition: transform 180ms cubic-bezier(0.22, 0.61, 0.36, 1),
    box-shadow 180ms cubic-bezier(0.22, 0.61, 0.36, 1);
}

.page-home .lane:hover,
.page-home .lane:focus-visible {
  transform: translate(-3px, -3px);
  box-shadow: var(--shadow-2), 6px 6px 0 color-mix(in srgb, var(--color-ink) 45%, transparent);
}

.page-home .lane__id {
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  opacity: 0.82;
}

.page-home .lane__title {
  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);
}

.page-home .lane__desc {
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  opacity: 0.9;
}

.page-home .lane__cta {
  margin-top: auto;
  padding-top: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.04em;
  border-top: var(--border-thin) solid currentColor;
}

.page-home .lane--capability {
  background: var(--color-accent);
  color: var(--color-accent-ink);
}

.page-home .lane--activity {
  background: var(--color-primary);
  color: var(--color-primary-ink);
}

.page-home .lane--partners {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

/* ================= 收口 ================= */
.page-home .closing {
  background: var(--color-surface);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-home .closing__grid {
  display: grid;
  gap: var(--space-6);
}

.page-home .closing__block {
  padding: var(--space-4) 0 0;
  border-top: var(--border-thick) solid var(--color-ink);
}

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

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

.page-home .closing__block--contact {
  border-top-color: var(--color-accent);
}

.page-home .closing__contact {
  margin: 0 0 var(--space-4);
  display: grid;
  gap: var(--space-2);
}

.page-home .closing__contact-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-2);
  padding-bottom: var(--space-1);
  border-bottom: var(--border-thin) dashed var(--color-line);
}

.page-home .closing__contact-row dt {
  flex: 0 0 auto;
  min-width: 96px;
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

.page-home .closing__contact-row dd {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-ink);
  word-break: break-all;
}

.page-home .closing__more {
  margin: var(--space-6) 0 0;
  padding-top: var(--space-3);
  border-top: var(--rule-offset);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-muted);
}

.page-home .closing__more a {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-accent);
}

/* ================= 响应式 ================= */
@media (max-width: 639px) {
  .page-home .hero__stat-num {
    font-size: var(--text-xl);
  }

  .page-home .cat-strip {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-home .revisions__node {
    flex-basis: 86%;
  }
}

@media (min-width: 640px) {
  .page-home .seasons__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-home .cat-strip {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-home .revisions__node {
    flex-basis: 52%;
  }
}

@media (min-width: 900px) {
  .page-home .hero {
    padding-block: 108px 124px;
  }

  .page-home .hero::before {
    width: 54%;
    height: 54%;
    clip-path: polygon(0 48%, 100% 100%, 0 100%);
  }

  .page-home .hero::after {
    content: "";
    position: absolute;
    top: 0;
    right: 0;
    bottom: auto;
    left: auto;
    width: 42%;
    height: 100%;
    background: var(--color-primary);
    clip-path: polygon(14% 0, 100% 0, 100% 100%, 0 100%);
    z-index: 0;
  }

  .page-home .hero__inner {
    grid-template-columns: minmax(0, 64fr) minmax(0, 36fr);
    align-items: center;
    gap: var(--space-6);
  }

  .page-home .hero__stats {
    padding-left: var(--space-2);
  }

  .page-home .index-band__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: center;
    gap: var(--space-8);
  }

  .page-home .cat-strip {
    grid-template-columns: repeat(9, minmax(0, 1fr));
  }

  .page-home .revisions__track {
    padding-inline: max(var(--gutter), calc((100vw - var(--container)) / 2));
  }

  .page-home .revisions__node {
    flex-basis: 320px;
  }

  .page-home .lanes__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr) minmax(0, 0.88fr);
  }

  .page-home .lane--capability {
    clip-path: polygon(0 0, 100% 0, 94% 100%, 0 100%);
  }

  .page-home .lane--partners {
    clip-path: polygon(12% 0, 100% 0, 100% 100%, 0 100%);
  }

  .page-home .closing__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: var(--space-8);
  }
}

@media (min-width: 1120px) {
  .page-home .seasons__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .cat-chip,
  .page-home .lane {
    transition: none;
  }

  .page-home .cat-chip:hover,
  .page-home .cat-chip:focus-visible,
  .page-home .lane:hover,
  .page-home .lane:focus-visible {
    transform: none;
  }
}

.page-home {
  --rule-offset: currentColor;
}