.page-disclaimer {
  --clause-rule: 4px;
  --clause-indent: 20px;
  display: block;
  padding-bottom: 72px;
}

/* ---------- 首屏 ---------- */
.page-disclaimer .usage-hero {
  padding: 20px 0 6px;
}

.page-disclaimer .usage-hero .eyebrow {
  margin: 0 0 12px;
}

.page-disclaimer .usage-hero h1 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 7vw, 3.6rem);
  line-height: 1.05;
  letter-spacing: -0.01em;
  color: var(--fg-strong);
}

.page-disclaimer .usage-hero h1 .accent {
  color: var(--cyan);
}

.page-disclaimer .usage-lede {
  margin: 0 0 24px;
  max-width: 64ch;
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--fg-muted);
}

.page-disclaimer .usage-banner {
  margin: 0;
}

.page-disclaimer .usage-banner .img-frame {
  display: block;
  border: 1px solid var(--stroke);
  border-radius: var(--radius-l);
  overflow: hidden;
  background: var(--bg-panel);
}

.page-disclaimer .usage-banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

/* ---------- 章节索引 ---------- */
.page-disclaimer .usage-index {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 22px 0 14px;
  border-bottom: 1px solid var(--stroke);
  scrollbar-width: thin;
}

.page-disclaimer .usage-index a {
  flex: none;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 40px;
  padding: 6px 13px;
  border: 1px solid var(--stroke);
  border-radius: 999px;
  color: var(--fg-muted);
  font-size: 0.9rem;
  text-decoration: none;
  white-space: nowrap;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-disclaimer .usage-index a:hover,
.page-disclaimer .usage-index a:focus-visible {
  color: var(--mist);
  border-color: var(--cyan);
}

.page-disclaimer .usage-index .idx-num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

/* ---------- 条款骨架 ---------- */
.page-disclaimer .clause {
  position: relative;
  margin-top: 46px;
  padding-left: var(--clause-indent);
  scroll-margin-top: 104px;
}

.page-disclaimer .clause::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 4px;
  width: var(--clause-rule);
  border-radius: 2px;
  background: var(--cyan);
}

.page-disclaimer .clause--alt::before {
  background: var(--orange);
}

.page-disclaimer .clause-head {
  display: grid;
  gap: 8px;
  margin-bottom: 18px;
}

.page-disclaimer .clause-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-disclaimer .clause--alt .clause-num {
  color: var(--orange);
}

.page-disclaimer .clause-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  line-height: 1.15;
  color: var(--fg-strong);
}

.page-disclaimer .clause-lede {
  margin: 0;
  max-width: 62ch;
  line-height: 1.75;
  color: var(--fg-muted);
}

.page-disclaimer .clause-body p {
  margin: 0 0 14px;
  max-width: 68ch;
  line-height: 1.75;
  color: var(--fg-muted);
}

.page-disclaimer .clause-body a {
  color: var(--cyan-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(127, 243, 220, 0.4);
}

.page-disclaimer .clause-body a:hover,
.page-disclaimer .clause-body a:focus-visible {
  color: var(--mist);
  border-bottom-color: var(--cyan);
}

/* ---------- 状态筛选 ---------- */
.page-disclaimer .usage-filter {
  margin-top: 4px;
}

.page-disclaimer .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.page-disclaimer .filter-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 8px 15px;
  border: 1px solid var(--stroke);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--haze);
  cursor: pointer;
  transition: color 180ms var(--ease), border-color 180ms var(--ease), background 180ms var(--ease);
}

.page-disclaimer .filter-pill input {
  appearance: none;
  -webkit-appearance: none;
  position: relative;
  flex: none;
  width: 14px;
  height: 14px;
  margin: 0;
  border: 1px solid var(--haze);
  border-radius: 50%;
  background: transparent;
}

.page-disclaimer .filter-pill input:checked {
  border-color: var(--cyan);
}

.page-disclaimer .filter-pill input:checked::after {
  content: "";
  position: absolute;
  inset: 2px;
  border-radius: 50%;
  background: var(--cyan);
}

.page-disclaimer .filter-pill:has(input:checked) {
  color: var(--mist);
  border-color: var(--cyan);
  background: rgba(34, 227, 192, 0.08);
}

.page-disclaimer .filter-pill:has(input:focus-visible) {
  outline: 2px solid var(--cyan-soft);
  outline-offset: 2px;
}

.page-disclaimer .usage-filter:has(#usage-view-allow:checked) .usage-item--license,
.page-disclaimer .usage-filter:has(#usage-view-license:checked) .usage-item--allow {
  display: none;
}

/* ---------- 条目列表 ---------- */
.page-disclaimer .usage-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-disclaimer .usage-item {
  display: grid;
  gap: 6px;
  padding: 14px 16px;
  background: var(--bg-panel);
  border: 1px solid var(--stroke);
  border-left: 3px solid var(--cyan);
  border-radius: var(--radius-m);
}

.page-disclaimer .usage-item--license {
  border-left-color: var(--yellow);
}

.page-disclaimer .usage-item-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
}

.page-disclaimer .usage-item-title {
  color: var(--fg-strong);
  font-size: 1rem;
  font-weight: 600;
}

.page-disclaimer .usage-item p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--fg-muted);
}

/* ---------- 署名示例 ---------- */
.page-disclaimer .cite-figure {
  margin: 0 0 14px;
}

.page-disclaimer .cite-label {
  display: block;
  margin-bottom: 7px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--haze);
}

.page-disclaimer .cite-block {
  margin: 0;
  padding: 14px 16px;
  overflow-x: auto;
  background: rgba(6, 18, 29, 0.86);
  border: 1px solid var(--stroke);
  border-left: 3px solid var(--cyan);
  border-radius: var(--radius-s);
}

.page-disclaimer .cite-block code {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.9;
  color: var(--cyan-soft);
  white-space: pre;
}

/* ---------- 要点清单 ---------- */
.page-disclaimer .rule-list {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-disclaimer .rule-list li {
  position: relative;
  max-width: 68ch;
  padding-left: 22px;
  line-height: 1.7;
  color: var(--fg-muted);
}

.page-disclaimer .rule-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.68em;
  width: 8px;
  height: 2px;
  background: var(--cyan);
}

/* ---------- 两栏对照 ---------- */
.page-disclaimer .split {
  display: grid;
  gap: 20px;
  margin-bottom: 18px;
}

.page-disclaimer .split-col h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--fg-strong);
}

.page-disclaimer .split-col .rule-list {
  margin-bottom: 0;
}

/* ---------- 联系区 ---------- */
.page-disclaimer .contact-ways {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-disclaimer .contact-ways li {
  display: grid;
  gap: 4px;
  padding: 15px 16px;
  background: var(--bg-panel);
  border: 1px solid var(--stroke);
  border-radius: var(--radius-m);
}

.page-disclaimer .way-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--haze);
}

.page-disclaimer .way-value {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  color: var(--fg-strong);
  word-break: break-word;
}

.page-disclaimer .way-note {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--fg-muted);
}

.page-disclaimer .cta-row {
  margin: 0;
}

/* ---------- 桌面布局 ---------- */
@media (min-width: 900px) {
  .page-disclaimer {
    --clause-indent: 30px;
    padding-bottom: 104px;
  }

  .page-disclaimer .usage-hero {
    padding-top: 34px;
  }

  .page-disclaimer .usage-lede {
    font-size: 1.125rem;
  }

  .page-disclaimer .clause {
    display: grid;
    grid-template-columns: minmax(200px, 300px) minmax(0, 1fr);
    gap: 12px 44px;
    margin-top: 68px;
  }

  .page-disclaimer .clause-head {
    align-content: start;
    margin-bottom: 0;
  }

  .page-disclaimer .split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 32px;
  }

  .page-disclaimer .contact-ways {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 14px;
  }

  .page-disclaimer .contact-ways li:first-child {
    grid-column: 1 / -1;
  }
}

/* ---------- 宽屏留白 ---------- */
@media (min-width: 1240px) {
  .page-disclaimer .clause {
    gap: 12px 64px;
  }

  .page-disclaimer .usage-filter {
    max-width: 76ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .usage-index a,
  .page-disclaimer .filter-pill {
    transition: none;
  }
}