.page-disclaimer {
  --rule-num-w: 44px;
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-disclaimer .breadcrumb {
  margin-bottom: 22px;
}

/* ---------- 框景首屏 ---------- */
.page-disclaimer .usage-hero {
  position: relative;
  border: 1px solid var(--ink-line);
  background:
    radial-gradient(130% 150% at 0% 0%, rgba(217, 164, 65, 0.10), transparent 58%),
    var(--carbon);
  padding: clamp(34px, 6vw, 60px) clamp(20px, 4vw, 52px) clamp(26px, 4vw, 46px);
  box-shadow: var(--shadow-soft);
  margin-bottom: clamp(40px, 7vw, 72px);
  overflow: hidden;
  overflow-wrap: break-word;
}

.page-disclaimer .usage-hero::before,
.page-disclaimer .usage-hero::after {
  content: "";
  position: absolute;
  width: 22px;
  height: 22px;
  pointer-events: none;
}

.page-disclaimer .usage-hero::before {
  top: -1px;
  left: -1px;
  border-top: 2px solid var(--amber);
  border-left: 2px solid var(--amber);
}

.page-disclaimer .usage-hero::after {
  bottom: -1px;
  right: -1px;
  border-bottom: 2px solid var(--amber);
  border-right: 2px solid var(--amber);
}

.page-disclaimer .usage-hero__ruler {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 12px;
  background-image: repeating-linear-gradient(90deg, var(--ink-line) 0 1px, transparent 1px 11px);
  border-bottom: 1px solid var(--line-soft);
  opacity: 0.85;
}

.page-disclaimer .usage-hero__inner {
  padding-top: 16px;
}

.page-disclaimer .usage-hero__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(32px, 6vw, 52px);
  line-height: 1.12;
  letter-spacing: -0.012em;
  color: var(--paper);
  margin: 14px 0 18px;
}

.page-disclaimer .usage-hero__lede {
  max-width: 40em;
  margin: 0;
  color: rgba(244, 241, 234, 0.82);
}

.page-disclaimer .usage-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--gold);
}

.page-disclaimer .usage-hero__meta .muted {
  color: var(--mist);
}

/* ---------- 主体两栏 ---------- */
.page-disclaimer .usage-layout {
  display: block;
}

.page-disclaimer .usage-toc {
  margin-bottom: 40px;
  padding-top: 14px;
  border-top: 2px solid var(--amber);
}

.page-disclaimer .usage-toc__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-disclaimer .usage-toc__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 10px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-disclaimer .usage-toc__item {
  flex: 0 0 auto;
}

.page-disclaimer .usage-toc .spy-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line-soft);
  font-size: 14px;
  color: var(--mist);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-disclaimer .usage-toc .spy-link .mono {
  color: var(--amber);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-disclaimer .usage-toc .spy-link:hover,
.page-disclaimer .usage-toc .spy-link:focus-visible {
  color: var(--paper);
  border-color: var(--amber);
}

.page-disclaimer .usage-toc .spy-link.is-active {
  color: var(--gold);
  border-color: var(--amber);
}

/* ---------- 章节 ---------- */
.page-disclaimer .usage-section {
  scroll-margin-top: calc(var(--header-h) + 28px);
  margin-bottom: clamp(44px, 7vw, 72px);
}

.page-disclaimer .usage-section:last-child {
  margin-bottom: 0;
}

.page-disclaimer .usage-section__head {
  display: grid;
  grid-template-columns: var(--rule-num-w) minmax(0, 1fr);
  gap: 12px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line-soft);
}

.page-disclaimer .usage-section__index {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--amber);
  padding-top: 8px;
}

.page-disclaimer .usage-section__title {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(21px, 2.6vw, 27px);
  line-height: 1.35;
  letter-spacing: 0.005em;
  color: var(--paper);
  margin: 0 0 10px;
}

.page-disclaimer .usage-section__lede {
  margin: 0;
  max-width: 40em;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(169, 180, 196, 0.92);
}

/* ---------- 规则条目 ---------- */
.page-disclaimer .rule-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-disclaimer .rule-item {
  display: grid;
  grid-template-columns: var(--rule-num-w) minmax(0, 1fr);
  gap: 12px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line-soft);
  transition: background-color 0.18s ease;
}

.page-disclaimer .rule-item:hover {
  background-color: rgba(38, 50, 68, 0.34);
}

.page-disclaimer .rule-item__num {
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--amber);
  padding-top: 4px;
}

.page-disclaimer .rule-item__body {
  min-width: 0;
}

.page-disclaimer .rule-item__title {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 18px;
  line-height: 1.5;
  color: var(--paper);
  margin: 0 0 8px;
}

.page-disclaimer .rule-item__text {
  margin: 0;
  max-width: 40em;
  font-size: 15.5px;
  line-height: 1.82;
  color: rgba(244, 241, 234, 0.78);
  overflow-wrap: break-word;
}

.page-disclaimer .rule-item__tip {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: var(--mist);
  opacity: 0.7;
  transition: color 0.18s ease, opacity 0.18s ease;
}

.page-disclaimer .rule-item--compat .rule-item__num {
  color: var(--signal);
}

.page-disclaimer .rule-item--compat .rule-item__num::before {
  content: "";
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 7px;
  vertical-align: 1px;
  background: var(--signal);
}

.page-disclaimer .rule-item--compat:hover .rule-item__tip,
.page-disclaimer .rule-item--compat:focus-within .rule-item__tip {
  opacity: 1;
  color: var(--signal);
}

/* ---------- 图 ---------- */
.page-disclaimer .usage-figure {
  margin: clamp(28px, 4vw, 40px) 0 0;
}

.page-disclaimer .usage-figure .figure__frame {
  border: 1px solid var(--ink-line);
  background: var(--grayblue);
}

.page-disclaimer .usage-figure .figure__cap {
  margin-top: 12px;
  padding-left: 12px;
  border-left: 2px solid var(--amber);
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 反馈路径 ---------- */
.page-disclaimer .usage-routes {
  margin-top: 4px;
  border-top: 1px solid var(--line-soft);
}

.page-disclaimer .usage-route {
  display: block;
  position: relative;
  padding: 26px 0 26px 44px;
  border-bottom: 1px solid var(--line-soft);
  text-decoration: none;
  color: inherit;
  transition: background-color 0.18s ease;
}

.page-disclaimer .usage-route:hover,
.page-disclaimer .usage-route:focus-visible {
  background-color: rgba(38, 50, 68, 0.5);
}

.page-disclaimer .usage-route__index {
  position: absolute;
  left: 0;
  top: 28px;
  width: 26px;
  height: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--amber);
  font-size: 12px;
  color: var(--gold);
}

.page-disclaimer .usage-route__title {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 19px;
  color: var(--paper);
  margin: 0 0 8px;
}

.page-disclaimer .usage-route__text {
  margin: 0;
  max-width: 38em;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 241, 234, 0.76);
}

.page-disclaimer .usage-route__cta {
  display: inline-block;
  margin-top: 14px;
  font-size: 13.5px;
  letter-spacing: 0.04em;
  color: var(--gold);
  border-bottom: 1px solid rgba(255, 217, 138, 0.4);
  transition: border-color 0.18s ease, color 0.18s ease;
}

.page-disclaimer .usage-route:hover .usage-route__cta,
.page-disclaimer .usage-route:focus-visible .usage-route__cta {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

.page-disclaimer .usage-contact-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  margin-top: 26px;
  padding: 18px 0;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  font-size: 13.5px;
  color: var(--gold);
  overflow-wrap: break-word;
}

.page-disclaimer .usage-contact-bar .muted {
  color: var(--mist);
}

.page-disclaimer .usage-tail {
  margin: 22px 0 0;
  font-size: 14px;
  line-height: 1.9;
  color: var(--mist);
}

.page-disclaimer .usage-tail .link-underline {
  color: var(--paper);
}

/* ---------- 桌面 ---------- */
@media (min-width: 1000px) {
  .page-disclaimer {
    --rule-num-w: 64px;
  }

  .page-disclaimer .usage-layout {
    display: grid;
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-disclaimer .usage-toc {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    margin-bottom: 0;
    padding-left: 18px;
    border-top: none;
    border-left: 1px solid var(--ink-line);
  }

  .page-disclaimer .usage-toc::before {
    content: "";
    position: absolute;
    left: -1px;
    top: 0;
    width: 2px;
    height: 42px;
    background: var(--amber);
  }

  .page-disclaimer .usage-toc__list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
    border-top: 1px solid var(--line-soft);
  }

  .page-disclaimer .usage-toc__item {
    flex: none;
    border-bottom: 1px solid var(--line-soft);
  }

  .page-disclaimer .usage-toc .spy-link {
    display: flex;
    width: 100%;
    padding: 11px 0;
    border: none;
    white-space: normal;
    line-height: 1.5;
  }

  .page-disclaimer .usage-toc .spy-link:hover,
  .page-disclaimer .usage-toc .spy-link:focus-visible,
  .page-disclaimer .usage-toc .spy-link.is-active {
    border: none;
    color: var(--gold);
    padding-left: 6px;
  }

  .page-disclaimer .usage-routes {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 40px;
    border-top: none;
  }

  .page-disclaimer .usage-route {
    border-top: 1px solid var(--line-soft);
  }

  .page-disclaimer .usage-route + .usage-route {
    border-left: 1px solid var(--line-soft);
    padding-left: 40px;
  }

  .page-disclaimer .usage-route + .usage-route .usage-route__index {
    left: 40px;
  }
}

@media (min-width: 1280px) {
  .page-disclaimer .usage-section__head,
  .page-disclaimer .rule-item {
    gap: 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .rule-item,
  .page-disclaimer .rule-item__tip,
  .page-disclaimer .usage-route,
  .page-disclaimer .usage-route__cta,
  .page-disclaimer .usage-toc .spy-link {
    transition: none;
  }
}
</main>