.page-disclaimer {
  --usage-rail: clamp(196px, 20vw, 258px);
  --usage-hair: rgba(199, 206, 214, 0.42);
  --usage-hair-dark: rgba(227, 197, 140, 0.28);
  display: block;
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-disclaimer .usage-hero {
  padding-block: clamp(1.5rem, 4vw, 2.5rem) clamp(2.25rem, 6vw, 4rem);
  border-bottom: 1px solid var(--usage-hair-dark);
}

.page-disclaimer .usage-hero__grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
  min-width: 0;
}

.page-disclaimer .usage-hero__copy {
  min-width: 0;
  max-width: 44rem;
}

.page-disclaimer .usage-hero__index {
  margin: 0;
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--copper-soft);
}

.page-disclaimer .usage-hero__title {
  margin: 0.6rem 0 1rem;
  font-size: clamp(2.5rem, 9vw, 4.5rem);
  font-weight: 200;
  line-height: 1.02;
  letter-spacing: 0.01em;
}

.page-disclaimer .usage-hero__lede {
  margin: 0;
  max-width: 38ch;
  font-size: clamp(1rem, 1.25vw, 1.0625rem);
  line-height: 1.9;
  color: var(--muted-dark);
}

.page-disclaimer .usage-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .usage-hero__facts li {
  padding: 0.35rem 0.85rem;
  border: 1px solid var(--usage-hair-dark);
  border-radius: var(--radius-pill);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--copper-soft);
}

.page-disclaimer .usage-hero__media {
  margin: 0;
  min-width: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(150deg, var(--ink-2), var(--ink));
}

.page-disclaimer .usage-hero__media .media__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 主体：目录 + 条款 ---------- */
.page-disclaimer .usage-body {
  padding-block: 0;
}

.page-disclaimer .usage-layout {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  padding-block: clamp(2.25rem, 6vw, 4rem);
  min-width: 0;
}

.page-disclaimer .usage-toc {
  align-self: start;
  min-width: 0;
  padding: 1.15rem 1.25rem;
  border: 1px solid var(--usage-hair);
  border-radius: var(--radius-lg);
  background: var(--silver-soft);
}

.page-disclaimer .usage-toc__title {
  margin: 0 0 0.85rem;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--copper-deep);
}

.page-disclaimer .usage-toc__list {
  display: grid;
  gap: 0.15rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .usage-toc__link {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  padding: 0.5rem 0.6rem;
  border-left: 2px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--ink);
  font-size: 0.9375rem;
  line-height: 1.5;
  text-decoration: none;
  transition: background 0.25s var(--ease), border-color 0.25s var(--ease), color 0.25s var(--ease);
}

.page-disclaimer .usage-toc__link:hover,
.page-disclaimer .usage-toc__link:focus-visible {
  background: var(--paper);
  border-left-color: var(--copper);
}

.page-disclaimer .usage-toc__num {
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--copper);
}

.page-disclaimer .usage-toc__note {
  margin: 1rem 0 0;
  padding-top: 0.85rem;
  border-top: 1px solid var(--usage-hair);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  line-height: 1.7;
  color: var(--muted-light);
}

.page-disclaimer .usage-clauses {
  display: grid;
  min-width: 0;
}

.page-disclaimer .usage-clause {
  padding-block: clamp(1.6rem, 3.5vw, 2.5rem);
  border-top: 1px solid var(--usage-hair);
  scroll-margin-top: 6rem;
  min-width: 0;
}

.page-disclaimer .usage-clause:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-disclaimer .usage-clause__head {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  margin-bottom: 0.9rem;
}

.page-disclaimer .usage-clause__num {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--copper);
}

.page-disclaimer .usage-clause__title {
  margin: 0;
  font-size: clamp(1.3rem, 2.4vw, 1.7rem);
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: 0.01em;
  color: var(--ink);
}

.page-disclaimer .usage-clause__body {
  display: grid;
  gap: 0.9rem;
  max-width: 46ch;
  color: var(--muted-light);
  font-size: 1rem;
  line-height: 1.9;
}

.page-disclaimer .usage-clause__body p {
  margin: 0;
}

.page-disclaimer .usage-list {
  display: grid;
  gap: 0.55rem;
  margin: 0;
  padding-left: 1.15rem;
}

.page-disclaimer .usage-list li {
  padding-left: 0.1rem;
}

.page-disclaimer .usage-list li::marker {
  color: var(--copper);
}

.page-disclaimer .usage-rhythm {
  display: grid;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .usage-rhythm li {
  display: grid;
  grid-template-columns: 3.25rem minmax(0, 1fr);
  gap: 0.85rem;
  padding: 0.6rem 0 0.6rem 0.9rem;
  border-left: 2px solid var(--celadon);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.page-disclaimer .usage-rhythm span {
  color: var(--celadon-dark);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
}

.page-disclaimer .usage-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 0.35rem;
}

.page-disclaimer .usage-clause__body .link-underline {
  color: var(--ink);
}

/* ---------- 断点 ---------- */
@media (min-width: 768px) {
  .page-disclaimer .usage-rhythm li {
    grid-template-columns: 4.5rem minmax(0, 1fr);
  }
}

@media (min-width: 900px) {
  .page-disclaimer .usage-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
  }

  .page-disclaimer .usage-hero__copy {
    padding-block: 1rem;
  }

  .page-disclaimer .usage-layout {
    grid-template-columns: var(--usage-rail) minmax(0, 1fr);
    align-items: start;
  }

  .page-disclaimer .usage-toc {
    position: sticky;
    top: 2rem;
  }

  .page-disclaimer .usage-clause:first-child {
    padding-top: 0.25rem;
  }
}

@media (min-width: 1240px) {
  .page-disclaimer .usage-clause__body {
    max-width: 48ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .usage-toc__link {
    transition: none;
  }
}