.page-disclaimer {
  --doc-rail-w: 208px;
  --doc-max: 68ch;
  background-color: var(--ink-900);
  background-image:
    linear-gradient(180deg, rgba(0, 224, 200, 0.05), rgba(0, 224, 200, 0) 340px),
    linear-gradient(180deg, var(--ink-800), var(--ink-900) 28%);
  padding-bottom: clamp(56px, 9vw, 120px);
}

.page-disclaimer .crumbs {
  margin-top: clamp(18px, 4vw, 36px);
}

/* ---------- 首屏 ---------- */
.page-disclaimer .doc-hero {
  display: grid;
  gap: 28px;
  padding: clamp(24px, 5vw, 48px) 0 clamp(32px, 6vw, 56px);
  border-bottom: 1px solid var(--line-strong);
}

.page-disclaimer .doc-hero-copy {
  max-width: 60ch;
}

.page-disclaimer .doc-hero h1 {
  margin: 12px 0 0;
  font-size: clamp(1.9rem, 4.4vw, 3.1rem);
  line-height: 1.22;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-disclaimer .doc-hero .lede {
  margin-top: 18px;
  color: var(--text-soft);
}

.page-disclaimer .doc-hero-figure {
  margin: 0;
  aspect-ratio: 2 / 1;
  border: 1px solid var(--line);
  background: var(--ink-800);
}

.page-disclaimer .doc-hero-figure img {
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-disclaimer .doc-hero-figure .media-caption {
  display: block;
  padding: 10px 12px;
  border-top: 1px solid var(--line);
  background: var(--ink-800);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* ---------- 文档骨架 ---------- */
.page-disclaimer .doc-shell {
  display: grid;
  gap: 0;
}

.page-disclaimer .doc-rail {
  position: sticky;
  top: 12px;
  z-index: 2;
  align-self: start;
  padding: 18px 0 6px;
  border-top: 1px solid var(--line);
  background: var(--ink-900);
}

.page-disclaimer .doc-rail-label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-disclaimer .doc-rail-list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0 0 10px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-disclaimer .doc-rail-link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  flex: 0 0 auto;
  padding: 8px 11px;
  border: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.2;
  color: var(--text-soft);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--ease), background-color var(--ease), border-color var(--ease);
}

.page-disclaimer .doc-rail-idx {
  font-family: var(--font-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
  transition: color var(--ease);
}

.page-disclaimer .doc-rail-link:hover,
.page-disclaimer .doc-rail-link:focus-visible {
  color: var(--ink-900);
  background: var(--cyan);
  border-color: var(--cyan);
  outline: none;
}

.page-disclaimer .doc-rail-link:hover .doc-rail-idx,
.page-disclaimer .doc-rail-link:focus-visible .doc-rail-idx {
  color: var(--ink-900);
}

.page-disclaimer .doc-body {
  border-top: 1px solid var(--line);
}

.page-disclaimer .doc-section {
  padding: clamp(28px, 4vw, 44px) 0;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 88px;
}

.page-disclaimer .doc-section:last-child {
  border-bottom: 0;
}

.page-disclaimer .doc-mark {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-disclaimer .doc-title {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: clamp(1.05rem, 1.5vw, 1.3rem);
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: 0.01em;
  color: var(--text);
}

.page-disclaimer .doc-title::before {
  content: "";
  display: inline-block;
  width: 9px;
  height: 9px;
  margin-right: 10px;
  background: var(--orange);
  transform: translateY(-1px);
}

.page-disclaimer .prose p {
  max-width: var(--doc-max);
  color: var(--text-soft);
}

.page-disclaimer .prose p + p {
  margin-top: 14px;
}

.page-disclaimer .prose a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 224, 200, 0.4);
  transition: border-color var(--ease), color var(--ease);
}

.page-disclaimer .prose a:hover,
.page-disclaimer .prose a:focus-visible {
  color: var(--text);
  border-bottom-color: var(--cyan);
  outline: none;
}

/* ---------- 要点列表 ---------- */
.page-disclaimer .doc-points {
  display: grid;
  gap: 14px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .doc-points > li {
  position: relative;
  max-width: var(--doc-max);
  padding-left: 24px;
  color: var(--text-soft);
}

.page-disclaimer .doc-points > li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 9px;
  height: 9px;
  background: var(--ink-700);
  border: 1px solid var(--cyan);
  transition: background-color var(--ease);
}

.page-disclaimer .doc-points > li:hover::before {
  background: var(--cyan);
}

.page-disclaimer .doc-points strong {
  color: var(--text);
  font-weight: 600;
}

.page-disclaimer .doc-stamp {
  display: inline-block;
  margin-right: 8px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.05em;
  font-variant-numeric: tabular-nums;
  color: var(--orange);
}

.page-disclaimer .doc-hint {
  display: block;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
  opacity: 0.5;
  transition: opacity var(--ease), color var(--ease);
}

.page-disclaimer .doc-points > li:hover .doc-hint,
.page-disclaimer .doc-points > li:focus-within .doc-hint {
  opacity: 1;
  color: var(--cyan);
}

/* ---------- 底部版本条 ---------- */
.page-disclaimer .doc-versions {
  margin-top: clamp(40px, 6vw, 68px);
  padding: clamp(20px, 3vw, 28px);
  border: 1px solid var(--line);
  background: var(--ink-800);
  overflow: hidden;
}

.page-disclaimer .doc-versions-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 18px;
}

.page-disclaimer .doc-versions-head .doc-title {
  margin: 0;
}

.page-disclaimer .doc-versions .track-controls {
  position: static;
  inset: auto;
  display: flex;
  gap: 8px;
}

.page-disclaimer .doc-version {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 232px;
  max-width: 300px;
  padding: 18px;
  border: 1px solid var(--line);
  background: var(--ink-900);
  transition: border-color var(--ease), background-color var(--ease);
}

.page-disclaimer .doc-version:hover {
  border-color: rgba(0, 224, 200, 0.45);
  background: var(--ink-700);
}

.page-disclaimer .doc-version-tag {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
}

.page-disclaimer .doc-version-range {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--orange);
}

.page-disclaimer .doc-version-note {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 桌面端 ---------- */
@media (min-width: 900px) {
  .page-disclaimer .doc-hero {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: end;
    gap: clamp(32px, 5vw, 64px);
  }
}

@media (min-width: 1000px) {
  .page-disclaimer .doc-shell {
    grid-template-columns: var(--doc-rail-w) minmax(0, 1fr);
    gap: clamp(40px, 5vw, 76px);
    align-items: start;
  }

  .page-disclaimer .doc-rail {
    position: sticky;
    top: 24px;
    padding: 4px 0 4px 20px;
    border-top: 0;
    border-left: 1px solid var(--line-strong);
    background: transparent;
  }

  .page-disclaimer .doc-rail-list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0;
  }

  .page-disclaimer .doc-rail-link {
    width: 100%;
    padding: 12px 4px;
    border: 0;
    border-bottom: 1px solid var(--line);
    background: none;
    color: var(--text-soft);
    position: relative;
  }

  .page-disclaimer .doc-rail-link::before {
    content: "";
    position: absolute;
    left: -21px;
    top: 50%;
    width: 12px;
    height: 1px;
    background: var(--cyan);
    opacity: 0;
    transform: translateY(-50%) scaleX(0.35);
    transform-origin: left center;
    transition: opacity var(--ease), transform var(--ease);
  }

  .page-disclaimer .doc-rail-link:hover,
  .page-disclaimer .doc-rail-link:focus-visible {
    background: none;
    color: var(--cyan);
    border-bottom-color: var(--line-strong);
  }

  .page-disclaimer .doc-rail-link:hover::before,
  .page-disclaimer .doc-rail-link:focus-visible::before {
    opacity: 1;
    transform: translateY(-50%) scaleX(1);
  }

  .page-disclaimer .doc-rail-link:hover .doc-rail-idx,
  .page-disclaimer .doc-rail-link:focus-visible .doc-rail-idx {
    color: var(--cyan);
  }

  .page-disclaimer .doc-body {
    border-top: 0;
  }

  .page-disclaimer .doc-section:first-child {
    padding-top: 4px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .doc-rail-link,
  .page-disclaimer .doc-rail-link::before,
  .page-disclaimer .doc-rail-idx,
  .page-disclaimer .doc-points > li::before,
  .page-disclaimer .doc-hint,
  .page-disclaimer .doc-version,
  .page-disclaimer .prose a {
    transition: none;
  }
}