.page-disclaimer {
  --toc-w: 244px;
  --term-left: 4px;
}

/* ===== 顶部版本条 ===== */
.page-disclaimer .usage-versionbar {
  border-top: 3px solid var(--signal-400);
  background: var(--ink-950);
  border-bottom: var(--stroke) solid var(--line-500);
  padding: 9px 0;
}

.page-disclaimer .usage-versionbar__inner {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--mist-300);
}

.page-disclaimer .usage-versionbar__dot {
  width: 8px;
  height: 8px;
  flex: none;
  border-radius: 50%;
  background: var(--signal-400);
  box-shadow: 0 0 0 3px rgba(79, 195, 247, 0.18);
}

.page-disclaimer .usage-versionbar__ver {
  color: var(--signal-400);
  font-weight: 700;
}

.page-disclaimer .usage-versionbar__sep {
  color: var(--line-500);
}

/* ===== 首屏 ===== */
.page-disclaimer .usage-hero {
  background: var(--turf-700);
  border-bottom: var(--stroke) solid var(--line-500);
  padding: 18px 0 30px;
}

.page-disclaimer .usage-hero .crumbs {
  margin-bottom: 20px;
}

.page-disclaimer .usage-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
  align-items: start;
}

.page-disclaimer .usage-hero__kicker {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--flare-500);
}

.page-disclaimer .usage-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(42px, 9vw, 76px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--mist-50);
}

.page-disclaimer .usage-hero__rule {
  display: block;
  width: 68px;
  height: 4px;
  margin: 16px 0 0;
  background: var(--flare-500);
}

.page-disclaimer .usage-hero__lead {
  margin: 18px 0 0;
  max-width: 30em;
  font-size: 17px;
  line-height: 1.75;
  color: var(--mist-300);
}

.page-disclaimer .usage-hero__shot {
  margin: 0;
  aspect-ratio: 14 / 9;
  overflow: hidden;
  border: var(--stroke) solid var(--line-500);
  border-radius: var(--radius);
  box-shadow: var(--hard);
  background: var(--turf-800);
}

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

/* ===== 条款区 ===== */
.page-disclaimer .usage-body {
  padding: 34px 0 56px;
  background: var(--turf-800);
}

.page-disclaimer .usage-body__head {
  margin-bottom: 26px;
}

.page-disclaimer .usage-body__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 4.6vw, 30px);
  line-height: 1.25;
  color: var(--mist-50);
}

.page-disclaimer .usage-body__note {
  margin: 0;
  max-width: 32em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist-300);
}

.page-disclaimer .usage-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

/* 目录 */
.page-disclaimer .usage-toc__label {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--mist-300);
}

.page-disclaimer .usage-toc__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-disclaimer .usage-toc__list li {
  flex: none;
}

.page-disclaimer .usage-toc__link {
  display: flex;
  align-items: center;
  gap: 9px;
  min-height: 44px;
  padding: 9px 13px;
  border: var(--stroke) solid var(--line-500);
  border-left: var(--term-left) solid var(--line-500);
  border-radius: var(--radius);
  background: var(--turf-700);
  color: var(--mist-50);
  font-size: 14px;
  line-height: 1.3;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 160ms var(--ease), background-color 160ms var(--ease);
}

.page-disclaimer .usage-toc__link .mono {
  font-size: 12px;
  color: var(--mist-300);
  transition: color 160ms var(--ease);
}

.page-disclaimer .usage-toc__link:hover,
.page-disclaimer .usage-toc__link:focus-visible {
  border-left-color: var(--flare-500);
  background: var(--turf-600);
}

.page-disclaimer .usage-toc__link:hover .mono,
.page-disclaimer .usage-toc__link:focus-visible .mono {
  color: var(--flare-500);
}

/* 条款块 */
.page-disclaimer .usage-terms {
  display: grid;
  gap: 16px;
}

.page-disclaimer .usage-term {
  padding: 18px clamp(16px, 3.4vw, 26px) 20px;
  border: var(--stroke) solid var(--line-500);
  border-left: var(--term-left) solid var(--line-500);
  border-radius: var(--radius);
  background: var(--turf-700);
  box-shadow: var(--hard-sm);
  scroll-margin-top: 108px;
  transition: border-color 160ms var(--ease), background-color 160ms var(--ease), box-shadow 160ms var(--ease);
}

.page-disclaimer .usage-term:hover {
  border-color: var(--flare-500);
  border-left-color: var(--flare-500);
  background: var(--turf-600);
}

.page-disclaimer .usage-term__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 12px;
}

.page-disclaimer .usage-term__num {
  flex: none;
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--mist-300);
  transition: color 160ms var(--ease);
}

.page-disclaimer .usage-term:hover .usage-term__num {
  color: var(--flare-500);
}

.page-disclaimer .usage-term__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(19px, 3.4vw, 23px);
  line-height: 1.3;
  color: var(--mist-50);
}

.page-disclaimer .usage-term__body p {
  margin: 0 0 12px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist-50);
}

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

.page-disclaimer .usage-term__list {
  display: grid;
  gap: 9px;
  margin: 0 0 12px;
  padding: 0;
  list-style: none;
}

.page-disclaimer .usage-term__list li {
  position: relative;
  padding-left: 16px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist-300);
}

.page-disclaimer .usage-term__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 5px;
  height: 5px;
  background: var(--flare-500);
}

.page-disclaimer .usage-term__sample {
  margin: 0 0 12px;
  padding: 11px 14px;
  border-left: var(--term-left) solid var(--line-500);
  background: var(--turf-800);
  border-radius: var(--radius);
  font-size: 14px;
  letter-spacing: 0.01em;
  color: var(--signal-400);
}

.page-disclaimer .usage-term__body a {
  color: var(--flare-500);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 160ms var(--ease);
}

.page-disclaimer .usage-term__body a:hover,
.page-disclaimer .usage-term__body a:focus-visible {
  color: var(--mist-50);
}

/* ===== 平板与桌面 ===== */
@media (min-width: 860px) {
  .page-disclaimer .usage-hero {
    padding: 22px 0 38px;
  }

  .page-disclaimer .usage-hero__grid {
    grid-template-columns: 7fr 5fr;
    gap: 34px;
    align-items: center;
  }

  .page-disclaimer .usage-body {
    padding: 44px 0 72px;
  }

  .page-disclaimer .usage-body__head {
    margin-bottom: 32px;
  }
}

@media (min-width: 1000px) {
  .page-disclaimer .usage-layout {
    grid-template-columns: var(--toc-w) 1fr;
    gap: 34px;
    align-items: start;
  }

  .page-disclaimer .usage-toc__label {
    margin-bottom: 12px;
  }

  .page-disclaimer .usage-toc__inner {
    position: sticky;
    top: calc(var(--statusbar-h) + 22px);
  }

  .page-disclaimer .usage-toc__list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-disclaimer .usage-toc__link {
    white-space: normal;
  }

  .page-disclaimer .usage-terms {
    gap: 18px;
  }

  .page-disclaimer .usage-term__num {
    font-size: 34px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .usage-term,
  .page-disclaimer .usage-term__num,
  .page-disclaimer .usage-toc__link,
  .page-disclaimer .usage-toc__link .mono,
  .page-disclaimer .usage-term__body a {
    transition: none;
  }
}