.page-disclaimer {
  padding-bottom: var(--sp-6);
  background:
    radial-gradient(120% 60% at 78% -10%, rgba(226, 161, 60, 0.10), transparent 62%),
    var(--ink);
  color: var(--paper);
}

.page-disclaimer .usage-intro {
  display: grid;
  gap: var(--sp-4);
  padding-block: var(--sp-5) var(--sp-7);
  max-width: 74ch;
}

.page-disclaimer .usage-intro .title-xl {
  margin: 0;
  font-size: clamp(1.75rem, 6.2vw, 3.5rem);
  line-height: 1.18;
  letter-spacing: 0.05em;
  color: var(--paper);
}

.page-disclaimer .usage-intro .lede {
  margin: 0;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--mist);
  max-width: 62ch;
}

/* 摘要带 */
.page-disclaimer .quickband {
  position: relative;
  overflow: hidden;
  border-block: 1px solid var(--line);
  background: var(--ink-deep);
}

.page-disclaimer .quickband__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.2;
  pointer-events: none;
}

.page-disclaimer .quickband__inner {
  position: relative;
  z-index: 1;
  padding-block: var(--sp-6) var(--sp-7);
}

.page-disclaimer .quickband__title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.16em;
  color: var(--amber);
}

.page-disclaimer .quickband__grid {
  display: grid;
  gap: 1px;
  margin-top: var(--sp-4);
  background: var(--line);
  border: 1px solid var(--line);
}

.page-disclaimer .quickband__item {
  display: grid;
  gap: var(--sp-2);
  padding: var(--sp-5) var(--sp-4);
  background: rgba(11, 27, 43, 0.88);
  color: var(--paper);
  text-decoration: none;
  transition: background 160ms var(--ease), box-shadow 160ms var(--ease);
}

.page-disclaimer .quickband__item:hover,
.page-disclaimer .quickband__item:focus-visible {
  background: rgba(22, 36, 47, 0.96);
  box-shadow: inset 3px 0 0 0 var(--amber);
}

.page-disclaimer .quickband__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--amber-soft);
}

.page-disclaimer .quickband__text {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--paper);
}

/* 主体两栏 */
.page-disclaimer .usage-body {
  display: grid;
  gap: var(--sp-7);
  padding-block: var(--sp-7) var(--sp-8);
}

.page-disclaimer .rules-main {
  min-width: 0;
}

.page-disclaimer .rule-group {
  padding-top: var(--sp-5);
  border-top: 1px solid var(--line);
}

.page-disclaimer .rule-group + .rule-group {
  margin-top: var(--sp-6);
}

.page-disclaimer .rule-group__head {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  margin-bottom: var(--sp-4);
}

.page-disclaimer .rule-group__label {
  display: grid;
  place-items: center;
  width: 2.4rem;
  height: 2.4rem;
  flex: none;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--amber);
}

.page-disclaimer .rule-group__title {
  margin: 0;
  font-size: clamp(1.125rem, 3.4vw, 1.5rem);
  font-weight: 900;
  letter-spacing: 0.06em;
  line-height: 1.4;
  color: var(--paper);
}

.page-disclaimer .rule-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-disclaimer .rule-item {
  display: grid;
  grid-template-columns: 3rem minmax(0, 1fr);
  gap: var(--sp-3);
  padding: var(--sp-4);
  background: var(--ink);
  transition: background 160ms var(--ease);
}

.page-disclaimer .rule-item:hover {
  background: var(--panel);
}

.page-disclaimer .rule-item__num {
  padding-top: 0.2em;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--amber-soft);
}

.page-disclaimer .rule-item__text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--paper);
}

.page-disclaimer .rule-item__text a {
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid rgba(226, 161, 60, 0.42);
  padding-bottom: 1px;
}

.page-disclaimer .rule-item__text a:hover,
.page-disclaimer .rule-item__text a:focus-visible {
  border-bottom-color: var(--amber-soft);
  color: var(--amber-soft);
}

/* 侧栏交叉指引 */
.page-disclaimer .rules-aside {
  display: grid;
  gap: var(--sp-3);
  min-width: 0;
}

.page-disclaimer .rules-aside__title {
  margin: 0 0 var(--sp-1);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-disclaimer .cross-card {
  display: grid;
  gap: var(--sp-2);
  padding: var(--sp-4);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--paper);
  transition: transform 180ms var(--ease), border-color 180ms var(--ease);
}

.page-disclaimer .cross-card:hover,
.page-disclaimer .cross-card:focus-visible {
  transform: translateY(-2px);
  border-color: var(--amber);
}

.page-disclaimer .cross-card__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--amber);
}

.page-disclaimer .cross-card__title {
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.5;
}

.page-disclaimer .cross-card__desc {
  font-size: 0.8125rem;
  line-height: 1.65;
  color: var(--mist);
}

/* 常驻返回 */
.page-disclaimer .back-dock {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 30;
  display: inline-flex;
  align-items: center;
  padding: 0.55rem 1rem;
  border-radius: 999px;
  background: var(--cinnabar);
  color: var(--paper);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  text-decoration: none;
  box-shadow: 0 6px 18px rgba(6, 18, 28, 0.55);
  transition: background 160ms var(--ease), transform 160ms var(--ease);
}

.page-disclaimer .back-dock:hover,
.page-disclaimer .back-dock:focus-visible {
  background: var(--cinnabar-deep);
  transform: translateY(-1px);
}

@media (min-width: 720px) {
  .page-disclaimer .quickband__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-disclaimer .rule-item {
    grid-template-columns: 3.6rem minmax(0, 1fr);
    padding: var(--sp-4) var(--sp-5);
  }

  .page-disclaimer .rule-item__text {
    font-size: 1rem;
  }

  .page-disclaimer .back-dock {
    right: 1.5rem;
    bottom: 1.5rem;
  }
}

@media (min-width: 1000px) {
  .page-disclaimer .usage-body {
    grid-template-columns: minmax(0, 8fr) minmax(0, 3fr);
    gap: var(--sp-8);
    align-items: start;
  }

  .page-disclaimer .rules-aside {
    position: sticky;
    top: 7rem;
  }

  .page-disclaimer .usage-intro {
    padding-block: var(--sp-6) var(--sp-8);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .quickband__item,
  .page-disclaimer .rule-item,
  .page-disclaimer .cross-card,
  .page-disclaimer .back-dock {
    transition: background 120ms linear, border-color 120ms linear;
  }

  .page-disclaimer .cross-card:hover,
  .page-disclaimer .cross-card:focus-visible,
  .page-disclaimer .back-dock:hover,
  .page-disclaimer .back-dock:focus-visible {
    transform: none;
  }
}