.page-disclaimer {
  --clause-no-size: 2.75rem;
  --term-col: 5rem;
  overflow-x: hidden;
}

.page-disclaimer .breadcrumb {
  padding-block: 1.25rem 0.25rem;
}

/* ---------- 首屏 ---------- */

.page-disclaimer .usage-hero {
  padding-block: clamp(1.25rem, 3.5vw, 2.25rem) clamp(2rem, 5vw, 3.5rem);
}

.page-disclaimer .usage-hero__head {
  max-width: 48rem;
}

.page-disclaimer .usage-hero__kicker {
  margin: 0 0 0.9rem;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-disclaimer .usage-hero h1 {
  margin: 0 0 1.1rem;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(1.9rem, 6vw, 3.35rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.page-disclaimer .usage-hero__lead {
  margin: 0;
  max-width: 43rem;
  font-size: clamp(0.98rem, 1.6vw, 1.08rem);
  line-height: 1.72;
  color: var(--text-muted);
}

.page-disclaimer .usage-hero__figure {
  margin: clamp(1.75rem, 4vw, 2.75rem) 0 0;
}

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

/* ---------- 条款区 ---------- */

.page-disclaimer .usage-terms {
  padding-block: clamp(2rem, 5vw, 3.5rem) clamp(1.5rem, 4vw, 2.5rem);
}

.page-disclaimer .clause-list {
  list-style: none;
  margin: clamp(1.5rem, 4vw, 2.5rem) 0 0;
  padding: 0;
  max-width: 52rem;
  border-top: 1px solid var(--grid-500);
}

.page-disclaimer .clause {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.85rem;
  padding-block: clamp(1.4rem, 3.4vw, 2.1rem);
  padding-inline: 0;
  border-bottom: 1px solid var(--grid-500);
  transition: background-color var(--t-base) var(--ease);
}

.page-disclaimer .clause:hover {
  background-color: var(--ink-800);
}

.page-disclaimer .clause__no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  align-self: start;
  width: var(--clause-no-size);
  height: var(--clause-no-size);
  border: 1px solid var(--grid-500);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-disclaimer .clause__no:hover,
.page-disclaimer .clause__no:focus-visible {
  color: var(--ink-900);
  background-color: var(--lime);
  border-color: var(--lime);
}

.page-disclaimer .clause__body h3 {
  margin: 0 0 0.7rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1.05rem, 2.2vw, 1.22rem);
  line-height: 1.45;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.page-disclaimer .clause__body p {
  margin: 0 0 0.75rem;
  max-width: 44rem;
  font-size: 0.98rem;
  line-height: 1.7;
  color: var(--text-muted);
}

.page-disclaimer .clause__body p:last-child {
  margin-bottom: 0;
}

.page-disclaimer .clause__body a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid var(--lime-deep);
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-disclaimer .clause__body a:hover,
.page-disclaimer .clause__body a:focus-visible {
  color: var(--text-primary);
  border-color: var(--text-primary);
}

.page-disclaimer .clause__note {
  margin: 0.9rem 0 0;
  padding-left: 0.85rem;
  border-left: 2px solid var(--grid-600);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--text-muted);
}

.page-disclaimer .clause__note a {
  color: var(--text-muted);
  text-decoration: none;
  border-bottom: 1px solid var(--grid-600);
}

.page-disclaimer .clause__note a:hover,
.page-disclaimer .clause__note a:focus-visible {
  color: var(--lime);
  border-color: var(--lime);
}

/* ---------- 引用示例块 ---------- */

.page-disclaimer .cite-sample {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin: 1.1rem 0 0;
  padding: 1rem 1.1rem 1.1rem;
  background-color: var(--ink-800);
  border: 1px solid var(--grid-500);
}

.page-disclaimer .cite-sample__code {
  display: grid;
  gap: 0.2rem;
}

.page-disclaimer .cite-sample__code p {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.75;
  color: var(--text-primary);
  max-width: none;
  overflow-wrap: anywhere;
}

.page-disclaimer .cite-sample__copy {
  align-self: flex-end;
  font-size: 0.72rem;
  padding: 0.32rem 0.8rem;
}

@media (hover: hover) and (pointer: fine) {
  .page-disclaimer .cite-sample__copy {
    opacity: 0;
    transition: opacity var(--t-fast) var(--ease);
  }

  .page-disclaimer .cite-sample:hover .cite-sample__copy,
  .page-disclaimer .cite-sample:focus-within .cite-sample__copy {
    opacity: 1;
  }
}

/* ---------- 页尾研究板 ---------- */

.page-disclaimer .usage-recap {
  padding-block: clamp(1.5rem, 4vw, 2.5rem) clamp(3rem, 7vw, 5.5rem);
}

.page-disclaimer .usage-recap__panel {
  max-width: 62rem;
  padding: clamp(1.5rem, 4vw, 3rem);
}

.page-disclaimer .usage-recap__title {
  display: inline-block;
  margin: 0 0 1.5rem;
  padding-bottom: 0.4rem;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(1.3rem, 3.2vw, 1.8rem);
  letter-spacing: -0.02em;
  color: var(--ink-paper);
  border-bottom: 3px solid var(--lime);
}

.page-disclaimer .usage-recap__list {
  list-style: none;
  margin: 0 0 1.6rem;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}

.page-disclaimer .usage-recap__list li {
  position: relative;
  padding-left: 1.6rem;
  font-size: 1rem;
  line-height: 1.68;
  color: var(--ink-paper);
}

.page-disclaimer .usage-recap__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.66em;
  width: 0.8rem;
  height: 0.22rem;
  background-color: var(--lime-deep);
}

.page-disclaimer .usage-recap__list a {
  color: var(--ink-paper);
  text-decoration: none;
  border-bottom: 1px solid var(--lime-deep);
}

.page-disclaimer .usage-recap__list a:hover,
.page-disclaimer .usage-recap__list a:focus-visible {
  border-color: var(--ink-paper);
}

.page-disclaimer .usage-recap__details {
  padding-top: 1.15rem;
  border-top: 1px solid var(--paper-2);
}

.page-disclaimer .usage-recap__details summary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  color: var(--ink-paper);
}

.page-disclaimer .usage-recap__details summary::-webkit-details-marker {
  display: none;
}

.page-disclaimer .usage-recap__details summary::before {
  content: "+";
  font-size: 0.95rem;
  line-height: 1;
  color: var(--lime-deep);
}

.page-disclaimer .usage-recap__details[open] summary::before {
  content: "−";
}

.page-disclaimer .usage-recap__details ul {
  list-style: none;
  margin: 1.1rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}

.page-disclaimer .usage-recap__details a {
  color: var(--ink-paper);
  font-size: 0.95rem;
  line-height: 1.6;
  text-decoration: none;
  border-bottom: 1px solid var(--lime-deep);
}

.page-disclaimer .usage-recap__details a:hover,
.page-disclaimer .usage-recap__details a:focus-visible {
  border-color: var(--ink-paper);
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-disclaimer .clause {
    grid-template-columns: var(--term-col) minmax(0, 1fr);
    gap: 0 1.5rem;
    padding-inline: 0.9rem;
    margin-inline: -0.9rem;
  }
}

@media (min-width: 1024px) {
  .page-disclaimer {
    --term-col: 6rem;
  }

  .page-disclaimer .clause-list {
    margin-left: 2rem;
  }

  .page-disclaimer .cite-sample {
    padding: 1.15rem 1.35rem 1.25rem;
  }
}