.page-home {
  --home-gap: clamp(20px, 4vw, 44px);
  --home-line: rgba(36, 56, 44, 0.62);
  position: relative;
  overflow-x: clip;
  padding-bottom: clamp(40px, 7vw, 96px);
}

.page-home::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: clamp(420px, 62vh, 760px);
  background-image: repeating-linear-gradient(
    115deg,
    transparent 0 46px,
    var(--line) 46px 47px
  );
  opacity: 0.45;
  pointer-events: none;
  z-index: 0;
}

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

.page-home .crumb {
  display: block;
  margin: 18px 0 4px;
}

.page-home .lede,
.page-home .prose {
  margin-top: 12px;
}

/* ---------- 声明带 ---------- */
.home-claim .claim-grid {
  display: grid;
  gap: var(--home-gap);
  align-items: start;
}

.claim-copy h1.display {
  margin: 10px 0 0;
}

.claim-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.claim-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  padding-left: 14px;
  border-left: 2px solid var(--clay);
}

.claim-item .num {
  color: var(--pulse);
  font-size: 12px;
  line-height: 1.9;
}

.claim-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.65;
  color: var(--board);
}

.claim-item strong {
  color: var(--paper);
  font-weight: 600;
}

.claim-figure img {
  width: 100%;
  height: auto;
  display: block;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border: 1px solid var(--line);
}

.scale-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 32px;
  background: var(--line);
  border-block: 1px solid var(--line);
}

.scale-item {
  background: var(--ink);
  padding: 16px 14px 18px;
}

.scale-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(20px, 5vw, 30px);
  letter-spacing: 0.09em;
  color: var(--gold);
  line-height: 1.15;
}

.scale-label {
  margin: 6px 0 0;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--board);
}

/* ---------- 两步切换 ---------- */
.step-rail {
  display: grid;
  gap: 1px;
  margin-top: 26px;
  background: var(--line);
  border: 1px solid var(--line);
}

.step-block {
  background: var(--layer);
  padding: 20px 18px 22px;
  position: relative;
}

.step-block::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 2px;
  background: var(--line);
}

.step-mark {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--pulse);
}

.step-links {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.step-links a {
  display: inline-block;
  padding: 9px 13px;
  border: 1px solid var(--line);
  color: var(--paper);
  text-decoration: none;
  font-size: 14px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.step-links a:hover,
.step-links a:focus-visible {
  border-color: var(--pulse);
  color: var(--pulse);
  background: rgba(255, 106, 31, 0.08);
}

.step-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.page-home .step-chip-row .chip[aria-pressed="true"] {
  background: var(--pulse);
  border-color: var(--pulse);
  color: var(--pulse-ink);
}

.page-home .step-chip-row .chip[aria-pressed="false"] {
  background: transparent;
  color: var(--board);
}

.step-note {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--board);
}

.step-figure {
  margin-top: 24px;
}

.step-figure img {
  width: 100%;
  height: auto;
  display: block;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--line);
}

/* ---------- 三轨并置带 ---------- */
.track-texture {
  margin-top: 4px;
}

.track-texture img {
  width: 100%;
  height: auto;
  display: block;
  aspect-ratio: 16 / 6;
  object-fit: cover;
  opacity: 0.75;
  border: 1px solid var(--line);
}

.track-band {
  margin-top: 22px;
  position: relative;
}

.page-home .track-row {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(258px, 84%);
  gap: 14px;
  align-items: start;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  margin-inline: calc(var(--gutter) * -1);
  padding: 6px var(--gutter) 16px;
  -webkit-overflow-scrolling: touch;
}

.track-card {
  scroll-snap-align: start;
  background: var(--layer);
  border: 1px solid var(--line);
  border-top: 3px solid var(--pulse);
  padding: 16px 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}

.track-card--g {
  border-top-color: var(--gold);
}

.track-card--t {
  border-top-color: var(--clay);
}

.track-head {
  display: grid;
  gap: 4px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--home-line);
}

.track-num {
  font-size: 26px;
  line-height: 1;
  color: var(--pulse);
  letter-spacing: 0.12em;
}

.track-card--g .track-num {
  color: var(--gold);
}

.track-card--t .track-num {
  color: #C1563C;
}

.track-title {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.track-caption {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--board);
}

.track-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.track-item {
  display: grid;
  gap: 6px;
  padding-top: 10px;
  border-top: 1px dashed var(--home-line);
}

.track-item:first-child {
  border-top: 0;
  padding-top: 0;
}

.track-item-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin: 0;
}

.track-item-head .num {
  color: var(--pulse);
  font-size: 13px;
}

.track-card--g .track-item-head .num {
  color: var(--gold);
}

.track-card--t .track-item-head .num {
  color: #C1563C;
}

.track-time {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--index);
  white-space: nowrap;
}

.track-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--board);
}

.track-desc .tag {
  margin-left: 4px;
  vertical-align: 1px;
}

.track-tags {
  list-style: none;
  margin: auto 0 0;
  padding: 12px 0 0;
  border-top: 1px solid var(--home-line);
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.track-hint {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--index);
}

/* ---------- 公告锚点 ---------- */
.anchor-grid {
  display: grid;
  gap: var(--home-gap);
  align-items: start;
}

.anchor-figure img {
  width: 100%;
  height: auto;
  display: block;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border: 1px solid var(--line);
}

.anchor-list {
  list-style: none;
  counter-reset: anchor;
  margin: 24px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.anchor-item {
  counter-increment: anchor;
  position: relative;
  padding: 14px 0 14px 38px;
  border-bottom: 1px solid var(--home-line);
}

.anchor-item::before {
  content: counter(anchor, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--index);
}

.anchor-brief {
  display: block;
  color: var(--paper);
  text-decoration: none;
  font-size: 15px;
  line-height: 1.6;
  transition: color var(--dur) var(--ease);
}

.anchor-brief:hover,
.anchor-brief:focus-visible {
  color: var(--pulse);
}

.anchor-more {
  margin: 0;
  max-height: 0;
  overflow: hidden;
  font-size: 13px;
  line-height: 1.7;
  color: var(--board);
  transition: max-height 180ms var(--ease), margin-top 180ms var(--ease);
}

.anchor-item:hover .anchor-more,
.anchor-item:focus-within .anchor-more {
  max-height: 7em;
  margin-top: 8px;
}

.anchor-item.is-anchor {
  background: var(--layer);
  border-left: 3px solid var(--pulse);
  padding: 16px 14px 16px 38px;
  margin: 6px 0;
}

.anchor-item.is-anchor::before {
  left: 14px;
  color: var(--pulse);
}

.anchor-item.is-anchor .anchor-more {
  max-height: 7em;
  margin-top: 8px;
}

.anchor-tag {
  margin-top: 10px;
  display: inline-block;
}

/* ---------- 导出口径 ---------- */
.export-grid {
  display: grid;
  gap: var(--home-gap);
  align-items: start;
}

.export-copy .btn-line {
  margin-top: 18px;
}

.export-facts {
  margin: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.export-fact {
  background: var(--ink);
  padding: 14px 16px;
  display: grid;
  gap: 4px;
}

.export-key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--index);
}

.export-val {
  margin: 0;
  font-size: 15px;
  line-height: 1.55;
  color: var(--paper);
}

/* ---------- 老版本对照 ---------- */
.legacy-hint {
  position: relative;
  border: 1px solid var(--line);
  background: var(--layer);
  padding: 22px 20px 24px 26px;
  overflow: hidden;
}

.legacy-hint::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 7px;
  background: repeating-linear-gradient(
    45deg,
    var(--clay) 0 7px,
    var(--ink) 7px 14px
  );
}

.legacy-hint .display--sm {
  margin: 0;
}

.legacy-links {
  margin: 16px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  font-size: 14px;
}

.legacy-links a {
  color: var(--pulse);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease);
}

.legacy-links a:hover,
.legacy-links a:focus-visible {
  border-bottom-color: var(--pulse);
}

.legacy-links span {
  color: var(--index);
}

/* ---------- 桌面增强 ---------- */
@media (min-width: 880px) {
  .home-claim .claim-grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: clamp(28px, 5vw, 64px);
  }

  .claim-copy {
    padding-top: 12px;
  }

  .scale-row {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-top: 44px;
  }

  .step-rail {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  }

  .step-block {
    padding: 26px 26px 28px;
  }

  .step-figure {
    margin-top: 32px;
  }

  .page-home .track-row {
    grid-auto-columns: minmax(0, 1fr);
    margin-inline: 0;
    padding-inline: 0;
    padding-bottom: 20px;
  }

  .track-card:nth-child(2) {
    margin-top: 14px;
  }

  .track-card:nth-child(3) {
    margin-top: 6px;
  }

  .anchor-grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.4fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .export-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .legacy-hint {
    padding: 30px 32px 32px 40px;
  }
}

@media (min-width: 1100px) {
  .page-home .track-row {
    grid-auto-columns: minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .anchor-more,
  .page-home .step-links a,
  .page-home .anchor-brief {
    transition: opacity var(--dur) var(--ease);
  }
}
</main>