.page-disclaimer {
  --ud-warn-bg: rgba(255, 122, 47, 0.08);
  --ud-warn-line: rgba(255, 122, 47, 0.45);
  --ud-haunt: rgba(242, 246, 251, 0.05);
  background: var(--ink-900);
  color: var(--mist);
  padding-bottom: var(--section);
}

.page-disclaimer .crumbs {
  padding-top: clamp(1rem, 2.5vw, 1.6rem);
}

/* ---------- 首屏 ---------- */
.page-disclaimer .usage-hero {
  position: relative;
  padding: clamp(1.6rem, 4vw, 2.6rem) 0 clamp(1.8rem, 4vw, 3rem);
  border-bottom: 1px solid var(--line);
}

.page-disclaimer .usage-hero__inner {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.75rem);
}

.page-disclaimer .usage-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.04;
  font-size: clamp(2rem, 6vw, 4.1rem);
  color: var(--paper);
  margin: 0.7rem 0 0;
}

.page-disclaimer .usage-hero .lede {
  margin-top: 1.1rem;
  max-width: 56ch;
  font-size: clamp(1rem, 1.5vw, 1.12rem);
  line-height: 1.75;
  color: var(--mist);
}

.page-disclaimer .usage-hero__facts {
  display: grid;
  gap: 0.85rem;
  margin: clamp(1.4rem, 3vw, 2rem) 0 0;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line);
}

.page-disclaimer .usage-hero__facts > div {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.9rem;
  align-items: baseline;
}

.page-disclaimer .usage-hero__facts dt {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fog);
  flex: 0 0 auto;
}

.page-disclaimer .usage-hero__facts dd {
  margin: 0;
  font-size: 0.94rem;
  color: var(--paper);
}

.page-disclaimer .usage-hero__figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-800);
}

.page-disclaimer .usage-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.9) contrast(1.05);
}

.page-disclaimer .usage-hero__figure .figure__caption {
  padding: 0.7rem 0.85rem;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--fog);
}

@media (min-width: 900px) {
  .page-disclaimer .usage-hero__inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: end;
  }
}

/* ---------- 三条约定色带 ---------- */
.page-disclaimer .usage-band {
  background: linear-gradient(180deg, var(--ink-600), var(--ink-900));
  border-bottom: 1px solid var(--line);
  padding: clamp(1.1rem, 3vw, 1.6rem) 0;
}

.page-disclaimer .usage-band__grid {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-disclaimer .usage-band__card {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: 1.15rem 1.2rem 1.25rem;
  background: var(--ink-800);
  border-left: 2px solid var(--pulse);
  text-decoration: none;
  color: inherit;
  transition: background 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-disclaimer .usage-band__card:hover,
.page-disclaimer .usage-band__card:focus-visible {
  background: var(--ink-600);
  transform: translateY(-2px);
}

.page-disclaimer .usage-band__kicker {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--pulse);
}

.page-disclaimer .usage-band__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.02rem;
  line-height: 1.35;
  color: var(--paper);
}

.page-disclaimer .usage-band__text {
  font-size: 0.88rem;
  line-height: 1.65;
  color: var(--fog);
}

.page-disclaimer .usage-band__jump {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--volt);
}

@media (min-width: 760px) {
  .page-disclaimer .usage-band__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 正文与目录 ---------- */
.page-disclaimer .usage-layout {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
  padding-top: clamp(2rem, 5vw, 3.5rem);
}

.page-disclaimer .usage-toc {
  border-top: 1px solid var(--line);
  padding-top: 0.9rem;
}

.page-disclaimer .usage-toc__title {
  margin: 0 0 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fog);
}

.page-disclaimer .usage-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.1rem;
}

.page-disclaimer .usage-toc__list a {
  display: flex;
  align-items: baseline;
  gap: 0.45rem;
  padding: 0.3rem 0;
  font-size: 0.87rem;
  color: var(--fog);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

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

.page-disclaimer .usage-toc__list a[aria-current="true"] {
  color: var(--pulse);
  border-bottom-color: rgba(56, 245, 165, 0.45);
}

.page-disclaimer .usage-toc__num {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--pulse-dim);
}

.page-disclaimer .usage-toc__list a[aria-current="true"] .usage-toc__num {
  color: var(--pulse);
}

@media (min-width: 940px) {
  .page-disclaimer .usage-layout {
    grid-template-columns: minmax(0, 1fr) 224px;
    gap: clamp(2rem, 4vw, 3.5rem);
    align-items: start;
  }

  .page-disclaimer .usage-toc {
    grid-column: 2;
    grid-row: 1;
    position: sticky;
    top: calc(var(--masthead-h) + 1rem);
  }

  .page-disclaimer .usage-body {
    grid-column: 1;
    grid-row: 1;
  }

  .page-disclaimer .usage-toc__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
  }

  .page-disclaimer .usage-toc__list li + li a {
    border-top: 1px solid rgba(36, 52, 79, 0.6);
  }
}

/* ---------- 条款 ---------- */
.page-disclaimer .usage-body {
  display: grid;
  gap: clamp(2rem, 5vw, 3.25rem);
  min-width: 0;
}

.page-disclaimer .clause {
  position: relative;
  border-top: 1px solid var(--line);
  padding-top: clamp(1.15rem, 3vw, 1.7rem);
  scroll-margin-top: calc(var(--masthead-h) + 1.5rem);
}

.page-disclaimer .clause::after {
  content: attr(data-chapter);
  position: absolute;
  top: -0.18em;
  right: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(3.2rem, 9vw, 6.2rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--ud-haunt);
  pointer-events: none;
  user-select: none;
}

.page-disclaimer .clause__head {
  display: flex;
  align-items: baseline;
  gap: 0.8rem;
  margin-bottom: 0.85rem;
}

.page-disclaimer .clause__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  letter-spacing: 0.08em;
  color: var(--pulse);
}

.page-disclaimer .clause__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.015em;
  font-size: clamp(1.22rem, 2.5vw, 1.72rem);
  line-height: 1.24;
  color: var(--paper);
}

.page-disclaimer .clause__body {
  position: relative;
  max-width: 68ch;
  font-size: 1rem;
  line-height: 1.78;
  color: var(--mist);
}

.page-disclaimer .clause__body p {
  margin: 0 0 0.95rem;
}

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

.page-disclaimer .clause__body a {
  color: var(--pulse);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 245, 165, 0.38);
  transition: border-color 0.2s var(--ease);
}

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

.page-disclaimer .clause__list {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.page-disclaimer .clause__list li {
  position: relative;
  padding-left: 1.4rem;
  line-height: 1.7;
}

.page-disclaimer .clause__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 0.55rem;
  height: 1px;
  background: var(--pulse);
}

.page-disclaimer .notice {
  margin: 1.1rem 0 1rem;
  padding: 0.9rem 1rem;
  background: var(--ud-warn-bg);
  border-left: 2px solid var(--ud-warn-line);
  font-size: 0.94rem;
  line-height: 1.72;
  color: var(--mist);
}

.page-disclaimer .notice strong {
  color: var(--volt);
  font-weight: 700;
}

.page-disclaimer .cite-format {
  margin: 1rem 0 1.05rem;
  padding: 0.9rem 1rem;
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-left: 2px solid var(--pulse-dim);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.75;
  letter-spacing: 0.02em;
  color: var(--paper);
  white-space: pre-wrap;
  word-break: break-word;
  overflow-x: auto;
}

/* ---------- 收束 ---------- */
.page-disclaimer .usage-foot {
  margin-top: clamp(2.5rem, 6vw, 4rem);
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 1.1rem;
  align-items: center;
  justify-content: space-between;
}

.page-disclaimer .usage-foot__note {
  margin: 0;
  max-width: 46ch;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--fog);
}

.page-disclaimer .usage-foot__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

@media (max-width: 520px) {
  .page-disclaimer .clause::after {
    font-size: 3rem;
    top: -0.3em;
  }

  .page-disclaimer .usage-foot {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .usage-band__card,
  .page-disclaimer .usage-toc__list a,
  .page-disclaimer .clause__body a {
    transition: none;
  }

  .page-disclaimer .usage-band__card:hover,
  .page-disclaimer .usage-band__card:focus-visible {
    transform: none;
  }
}