.page-disclaimer {
  --dl-hair: rgba(14, 43, 36, .12);
  --dl-hair-ink: rgba(244, 247, 243, .16);
  --dl-signal-soft: rgba(255, 107, 26, .08);

  background: var(--light);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.55;
  overflow-x: hidden;
}

.page-disclaimer h1,
.page-disclaimer h2,
.page-disclaimer p,
.page-disclaimer ul,
.page-disclaimer ol,
.page-disclaimer figure {
  margin: 0;
}

/* ---------- 封面层 ---------- */
.page-disclaimer .usage-hero {
  position: relative;
  background: var(--ink);
  color: var(--light);
  padding: 22px 0 48px;
  overflow: hidden;
}

.page-disclaimer .usage-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(720px 320px at 88% -12%, rgba(255, 107, 26, .18), transparent 70%),
    repeating-linear-gradient(90deg, rgba(76, 107, 82, .22) 0 1px, transparent 1px 96px);
  pointer-events: none;
}

.page-disclaimer .usage-hero > .wrap {
  position: relative;
  z-index: 1;
}

.page-disclaimer .usage-hero__grid {
  margin-top: 26px;
  display: grid;
  gap: 30px;
}

.page-disclaimer .usage-hero__eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--amber);
}

.page-disclaimer .usage-hero__title {
  font-family: var(--font-display);
  font-size: clamp(30px, 7.4vw, 56px);
  line-height: 1.06;
  letter-spacing: -.01em;
  margin: 12px 0 16px;
}

.page-disclaimer .usage-hero__lede {
  font-size: 16.5px;
  line-height: 1.62;
  color: rgba(244, 247, 243, .82);
  max-width: 46ch;
}

.page-disclaimer .usage-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 32px;
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid var(--dl-hair-ink);
}

.page-disclaimer .usage-fact {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-disclaimer .usage-fact__num {
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1.2;
  color: var(--signal);
  letter-spacing: .02em;
}

.page-disclaimer .usage-fact__key {
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--field);
}

.page-disclaimer .usage-hero__media {
  border: 1px solid var(--dl-hair-ink);
  background: var(--ink-deep);
}

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

@media (min-width: 920px) {
  .page-disclaimer .usage-hero {
    padding: 26px 0 64px;
  }
  .page-disclaimer .usage-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    gap: 52px;
    align-items: end;
  }
}

/* ---------- 索引层 ---------- */
.page-disclaimer .usage-toc {
  background: var(--ink-deep);
  border-top: 1px solid var(--dl-hair-ink);
  border-bottom: 1px solid var(--dl-hair-ink);
}

.page-disclaimer .usage-toc__list {
  list-style: none;
  margin: 0;
  padding: 13px 0;
  display: flex;
  gap: 10px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-disclaimer .usage-toc__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  padding: 8px 14px;
  border: 1px solid var(--dl-hair-ink);
  border-radius: 999px;
  color: rgba(244, 247, 243, .78);
  text-decoration: none;
  font-size: 13.5px;
  transition: background 160ms ease, color 160ms ease, border-color 160ms ease;
}

.page-disclaimer .usage-toc__link .mono {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--signal);
}

.page-disclaimer .usage-toc__link:hover,
.page-disclaimer .usage-toc__link:focus-visible {
  background: rgba(255, 107, 26, .16);
  border-color: var(--signal);
  color: var(--light);
}

/* ---------- 内容层 ---------- */
.page-disclaimer .clauses {
  padding-top: 30px;
  padding-bottom: 18px;
}

.page-disclaimer .clauses-surface {
  background: #FFFFFF;
  border: 1px solid var(--dl-hair);
  border-radius: var(--radius);
  padding: 0 18px 8px;
  box-shadow: 0 30px 54px -46px rgba(8, 28, 23, .62);
}

.page-disclaimer .clauses-surface__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 16px;
  padding: 18px 0 16px;
  border-bottom: 1px solid var(--dl-hair);
}

.page-disclaimer .clauses-surface__mark {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--grass);
}

.page-disclaimer .clauses-surface__note {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--field-ink);
}

.page-disclaimer .clause {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  padding: 30px 0 30px 14px;
  border-top: 1px solid var(--dl-hair);
  border-left: 3px solid transparent;
  transition: border-color 200ms ease, background-color 200ms ease;
}

.page-disclaimer .clause:first-of-type {
  border-top-color: transparent;
}

.page-disclaimer .clause:target {
  border-left-color: var(--signal);
  background: var(--dl-signal-soft);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.page-disclaimer .clause__rail {
  display: flex;
  align-items: center;
  gap: 14px;
}

.page-disclaimer .clause__num {
  font-family: var(--font-mono);
  font-size: 30px;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--signal);
}

.page-disclaimer .clause__rule {
  flex: 1;
  height: 1px;
  background: var(--dl-hair);
}

.page-disclaimer .clause__title {
  font-family: var(--font-serif);
  font-size: 21px;
  font-weight: 600;
  line-height: 1.36;
  color: var(--ink);
  margin-bottom: 10px;
}

.page-disclaimer .clause__lede {
  font-size: 15.5px;
  line-height: 1.62;
  color: var(--field-ink);
  margin-bottom: 18px;
  max-width: 58ch;
}

.page-disclaimer .rule-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 11px;
}

.page-disclaimer .rule-list li {
  position: relative;
  padding-left: 22px;
  font-size: 15.5px;
  line-height: 1.65;
  max-width: 64ch;
}

.page-disclaimer .rule-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 11px;
  height: 2px;
  border-radius: 1px;
  background: var(--signal);
}

.page-disclaimer .rule-list .mono {
  font-family: var(--font-mono);
  font-size: 14.5px;
  color: var(--indigo);
}

.page-disclaimer .rule-list a {
  color: var(--wine);
  text-underline-offset: 3px;
}

.page-disclaimer .fold {
  margin-top: 18px;
  border-top: 1px dashed var(--dl-hair);
}

.page-disclaimer .fold__head {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 0;
  background: none;
  border: 0;
  font: inherit;
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--field-ink);
  cursor: pointer;
  text-align: left;
}

.page-disclaimer .fold__head:hover {
  color: var(--ink);
}

.page-disclaimer .fold__head:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

.page-disclaimer .fold__sign {
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1;
  color: var(--signal);
}

.page-disclaimer .fold__sign::after {
  content: "+";
}

.page-disclaimer .fold.is-open .fold__sign::after {
  content: "–";
}

.page-disclaimer .fold:not(.is-open) .fold__body {
  display: none;
}

.page-disclaimer .fold__inner {
  padding: 2px 0 8px;
  font-size: 14.5px;
  line-height: 1.68;
  color: var(--field-ink);
  max-width: 66ch;
}

.page-disclaimer .fold__inner a {
  color: var(--wine);
  text-underline-offset: 3px;
}

.page-disclaimer .copy-id {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin: 18px 0 4px;
  padding: 10px 10px 10px 16px;
  background: var(--ink);
  border-radius: var(--radius-sm);
  box-shadow: var(--paper-shadow);
}

.page-disclaimer .copy-id__val {
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: .06em;
  color: var(--note);
}

.page-disclaimer .copy-btn {
  border: 0;
  border-radius: 7px;
  padding: 9px 15px;
  background: var(--signal);
  color: #FFFFFF;
  font: inherit;
  font-size: 13px;
  letter-spacing: .04em;
  cursor: pointer;
  transition: background 160ms ease, color 160ms ease;
}

.page-disclaimer .copy-btn:hover {
  background: var(--amber);
  color: var(--ink-deep);
}

.page-disclaimer .copy-btn:focus-visible {
  outline: 2px solid var(--note);
  outline-offset: 2px;
}

.page-disclaimer .usage-tip {
  display: grid;
  gap: 8px;
  margin: 26px 0;
  padding: 18px 20px;
  border-radius: var(--radius-sm);
  background: linear-gradient(120deg, rgba(14, 43, 36, .96), rgba(38, 49, 79, .96));
  color: var(--light);
}

.page-disclaimer .usage-tip__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--note);
}

.page-disclaimer .usage-tip p {
  font-size: 14.5px;
  line-height: 1.66;
  color: rgba(244, 247, 243, .86);
  max-width: 72ch;
}

/* ---------- 收束层 ---------- */
.page-disclaimer .usage-tail {
  background: var(--ink);
  color: var(--light);
  padding: 52px 0 34px;
  margin-top: 30px;
}

.page-disclaimer .usage-tail__box {
  border: 1px solid var(--dl-hair-ink);
  border-radius: var(--radius);
  padding: 28px 22px;
  background: rgba(8, 28, 23, .55);
}

.page-disclaimer .usage-tail__box h2 {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 600;
  line-height: 1.36;
  margin-bottom: 12px;
}

.page-disclaimer .usage-tail__box p {
  font-size: 15.5px;
  line-height: 1.66;
  color: rgba(244, 247, 243, .8);
  max-width: 62ch;
}

.page-disclaimer .usage-tail__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-disclaimer .usage-tail__actions .btn--outline {
  border-color: var(--dl-hair-ink);
  color: var(--light);
}

.page-disclaimer .usage-tail__actions .btn--outline:hover {
  border-color: var(--signal);
  color: var(--amber);
}

.page-disclaimer .update-line {
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid var(--dl-hair-ink);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--field);
}

/* ---------- 桌面栅格 ---------- */
@media (min-width: 860px) {
  .page-disclaimer .clauses-surface {
    padding: 0 30px 14px;
  }
  .page-disclaimer .clause {
    grid-template-columns: 104px minmax(0, 1fr);
    gap: 36px;
    padding: 38px 0 38px 22px;
  }
  .page-disclaimer .clause__rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    align-self: start;
  }
  .page-disclaimer .clause__num {
    font-size: 34px;
  }
  .page-disclaimer .clause__rule {
    flex: none;
    width: 1px;
    height: 46px;
    background: linear-gradient(180deg, var(--signal), transparent);
  }
  .page-disclaimer .clause__title {
    font-size: 24px;
  }
  .page-disclaimer .usage-tail {
    padding: 64px 0 40px;
  }
  .page-disclaimer .usage-tail__box {
    padding: 34px 34px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer * {
    transition: none !important;
    animation: none !important;
  }
}