.page-disclaimer {
  --disc-rail: 236px;
  --disc-gap: clamp(2.5rem, 5vw, 4.5rem);
  padding-bottom: clamp(4rem, 9vw, 7rem);
}

/* ---------- 首屏 ---------- */
.page-disclaimer .usage-hero {
  position: relative;
  isolation: isolate;
  padding-top: clamp(1.5rem, 3.5vw, 2.75rem);
}

.page-disclaimer .usage-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: -18%;
  left: -22%;
  width: 78%;
  height: 66%;
  background: radial-gradient(58% 100% at 22% 0%, rgba(124, 77, 255, 0.22), rgba(124, 77, 255, 0) 72%);
  pointer-events: none;
}

.page-disclaimer .usage-hero__head {
  margin-top: 1.15rem;
  max-width: 62rem;
}

.page-disclaimer .usage-hero__title {
  margin: 0 0 1.1rem;
  color: var(--text);
  font-size: clamp(2.1rem, 5.4vw, 4.4rem);
  line-height: 1.08;
  letter-spacing: -0.025em;
}

.page-disclaimer .usage-hero__intro {
  margin: 0;
  max-width: 44em;
  color: var(--muted);
  font-size: clamp(0.9875rem, 1.25vw, 1.125rem);
  line-height: 1.9;
}

.page-disclaimer .usage-hero__figure {
  margin: clamp(2rem, 4vw, 3rem) 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: linear-gradient(140deg, var(--ink-2), rgba(124, 77, 255, 0.12) 55%, rgba(34, 211, 238, 0.1));
  box-shadow: var(--shadow);
}

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

@media (min-width: 880px) {
  .page-disclaimer .usage-hero__figure img {
    aspect-ratio: 16 / 6;
  }
}

/* ---------- 章节预览 ---------- */
.page-disclaimer .usage-preview {
  list-style: none;
  margin: clamp(2.25rem, 4.5vw, 3.25rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0 2.75rem;
  border-top: 1px solid var(--line);
}

@media (min-width: 720px) {
  .page-disclaimer .usage-preview {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-disclaimer .usage-preview__item {
  border-bottom: 1px solid var(--line);
}

.page-disclaimer .usage-preview__link {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  min-height: 48px;
  padding: 1.05rem 0;
  color: var(--text);
  text-decoration: none;
  transition: color 0.22s ease, padding-left 0.22s ease;
}

.page-disclaimer .usage-preview__link:hover,
.page-disclaimer .usage-preview__link:focus-visible {
  color: var(--cyan);
  padding-left: 0.4rem;
}

.page-disclaimer .usage-preview__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--violet);
}

.page-disclaimer .usage-preview__label {
  font-size: 0.9875rem;
  font-weight: 600;
  line-height: 1.5;
}

/* ---------- 主体布局 ---------- */
.page-disclaimer .usage-body {
  margin-top: clamp(3rem, 7vw, 5.5rem);
}

.page-disclaimer .usage-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(2rem, 4vw, 3rem);
}

@media (min-width: 1000px) {
  .page-disclaimer .usage-layout {
    grid-template-columns: var(--disc-rail) minmax(0, 1fr);
    gap: var(--disc-gap);
    align-items: start;
  }
}

/* ---------- 侧栏 ---------- */
.page-disclaimer .usage-rail {
  border-top: 1px solid var(--line);
  padding-top: 1.35rem;
}

@media (min-width: 1000px) {
  .page-disclaimer .usage-rail {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    border-top: none;
    padding-top: 0;
  }
}

.page-disclaimer .usage-rail__chapters {
  position: relative;
}

.page-disclaimer .usage-rail__tools {
  margin-top: 1.75rem;
}

/* ---------- 条款 ---------- */
.page-disclaimer .usage-clauses {
  min-width: 0;
}

.page-disclaimer .clause {
  --accent: var(--violet);
  position: relative;
  padding: clamp(1.75rem, 3.2vw, 2.5rem) 0 clamp(1.9rem, 3.6vw, 2.85rem);
  border-top: 1px solid var(--line);
}

.page-disclaimer .clause:last-child {
  border-bottom: 1px solid var(--line);
}

.page-disclaimer .clause:nth-child(6n + 1) { --accent: var(--violet); }
.page-disclaimer .clause:nth-child(6n + 2) { --accent: var(--cyan); }
.page-disclaimer .clause:nth-child(6n + 3) { --accent: var(--gold); }
.page-disclaimer .clause:nth-child(6n + 4) { --accent: var(--green); }
.page-disclaimer .clause:nth-child(6n + 5) { --accent: var(--red); }
.page-disclaimer .clause:nth-child(6n + 6) { --accent: var(--violet); }

.page-disclaimer .clause__head {
  display: flex;
  align-items: flex-start;
  gap: clamp(0.9rem, 2vw, 1.5rem);
  margin-bottom: 1.35rem;
}

.page-disclaimer .clause__headtext {
  min-width: 0;
}

.page-disclaimer .clause__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: clamp(2.3rem, 4.6vw, 3.4rem);
  font-weight: 700;
  line-height: 0.86;
  letter-spacing: -0.03em;
  color: rgba(124, 77, 255, 0.72);
  opacity: 0.55;
}

@supports (-webkit-text-stroke: 1px black) {
  .page-disclaimer .clause__num {
    color: transparent;
    -webkit-text-stroke: 1px var(--accent);
  }
}

.page-disclaimer .clause__title {
  margin: 0 0 0.5rem;
  color: var(--text);
  font-size: clamp(1.3rem, 2.5vw, 1.85rem);
  line-height: 1.28;
  letter-spacing: -0.012em;
}

.page-disclaimer .clause__kicker {
  margin: 0;
  color: var(--muted);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
}

.page-disclaimer .clause__kicker::before {
  content: "";
  display: inline-block;
  width: 18px;
  height: 2px;
  margin-right: 0.55rem;
  vertical-align: middle;
  background: var(--accent);
}

.page-disclaimer .clause__body {
  max-width: 62ch;
  color: rgba(248, 250, 252, 0.82);
  font-size: 1rem;
  line-height: 1.9;
}

.page-disclaimer .clause__body p {
  margin: 0 0 1.05rem;
}

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

.page-disclaimer .clause__body strong {
  color: var(--text);
  font-weight: 600;
}

.page-disclaimer .clause__body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 211, 238, 0.35);
  transition: border-color 0.22s ease, color 0.22s ease;
}

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

.page-disclaimer .clause__body ul,
.page-disclaimer .clause__body ol {
  list-style: none;
  margin: 0 0 1.15rem;
  padding: 0;
}

.page-disclaimer .clause__body li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.8rem;
}

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

.page-disclaimer .clause__body > ul > li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.85em;
  width: 0.5rem;
  height: 1px;
  background: linear-gradient(90deg, var(--accent), rgba(255, 255, 255, 0.08));
}

/* 时间轴微调 */
.page-disclaimer .clause__timeline {
  margin: 1.5rem 0 1.5rem;
}

/* 折叠面板间距 */
.page-disclaimer .panel {
  margin-top: 1.75rem;
}

.page-disclaimer .panel__body ul {
  margin: 0;
}

/* ---------- 结尾入口 ---------- */
.page-disclaimer .usage-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

@media (max-width: 560px) {
  .page-disclaimer .usage-actions .btn {
    width: 100%;
    text-align: center;
  }
}