.page-disclaimer {
  --pd-measure: 46rem;
  --pd-text: #C3CFE9;
  --pd-gap: clamp(2.75rem, 7vw, 4.25rem);
  position: relative;
  padding-bottom: clamp(4rem, 10vw, 7rem);
  overflow-x: clip;
}

/* ---------- 页首横幅 ---------- */
.page-disclaimer .pd-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(2rem, 7vw, 4.5rem) 0 clamp(2.25rem, 6vw, 3.75rem);
  border-bottom: 1px solid var(--xk-line);
}

.page-disclaimer .pd-hero__bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: .32;
}

.page-disclaimer .pd-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(120% 90% at 82% 8%, rgba(154, 107, 255, .22) 0%, rgba(6, 10, 28, 0) 58%),
    linear-gradient(180deg, rgba(6, 10, 28, .5) 0%, rgba(6, 10, 28, .9) 62%, var(--xk-ink) 100%);
}

.page-disclaimer .pd-hero__tag {
  margin: clamp(1.5rem, 4vw, 2.5rem) 0 0;
}

.page-disclaimer .pd-hero__title {
  margin: 1rem 0 0;
  font-size: clamp(2.15rem, 7.5vw, 4.25rem);
  font-weight: 700;
  letter-spacing: .05em;
  line-height: 1.02;
  color: var(--xk-white);
  max-width: 14ch;
}

.page-disclaimer .pd-hero__lead {
  margin: 1.35rem 0 0;
  max-width: 32rem;
  font-size: clamp(1rem, 2.2vw, 1.125rem);
  line-height: 1.8;
  color: var(--pd-text);
}

/* ---------- 摘要条 ---------- */
.page-disclaimer .pd-summary {
  position: sticky;
  top: var(--xk-header-h-sm);
  z-index: 6;
  background: rgba(6, 10, 28, .9);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--xk-line);
}

.page-disclaimer .pd-summary::before {
  content: "";
  display: block;
  height: 2px;
  background: linear-gradient(90deg, var(--xk-cyan), var(--xk-violet) 60%, rgba(59, 240, 208, 0));
}

.page-disclaimer .pd-summary__note {
  margin: 0;
  padding-top: .85rem;
  font-size: .875rem;
  line-height: 1.7;
  color: var(--xk-gray);
  max-width: 40rem;
}

.page-disclaimer .pd-summary__list {
  display: flex;
  gap: .5rem;
  margin: .75rem 0 0;
  padding: 0 0 .85rem;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  scrollbar-width: none;
}

.page-disclaimer .pd-summary__list::-webkit-scrollbar {
  display: none;
}

.page-disclaimer .pd-summary__list li {
  flex: none;
  scroll-snap-align: start;
}

.page-disclaimer .pd-summary__list a {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .4rem .85rem;
  border: 1px solid var(--xk-line-soft);
  border-radius: var(--xk-pill);
  font-size: .8125rem;
  letter-spacing: .05em;
  color: var(--xk-gray);
  text-decoration: none;
  white-space: nowrap;
  transition: color .25s var(--xk-ease), border-color .25s var(--xk-ease), background .25s var(--xk-ease);
}

.page-disclaimer .pd-summary__list a:hover,
.page-disclaimer .pd-summary__list a:focus-visible {
  color: var(--xk-cyan);
  border-color: rgba(59, 240, 208, .55);
  background: var(--xk-cyan-soft);
}

.page-disclaimer .pd-summary__num {
  font-family: var(--xk-font-mono);
  font-size: .7rem;
  letter-spacing: .06em;
  color: var(--xk-cyan);
}

/* ---------- 正文 ---------- */
.page-disclaimer .pd-body {
  padding-top: var(--pd-gap);
}

.page-disclaimer .pd-article {
  max-width: var(--pd-measure);
  margin-inline: auto;
}

.page-disclaimer .pd-section {
  padding-top: var(--pd-gap);
  border-top: 1px solid var(--xk-line-soft);
  scroll-margin-top: calc(var(--xk-header-h-sm) + 6.5rem);
}

.page-disclaimer .pd-section:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-disclaimer .pd-section__head {
  display: flex;
  align-items: baseline;
  gap: .9rem;
  margin-bottom: 1.15rem;
}

.page-disclaimer .pd-section__num {
  flex: none;
  font-family: var(--xk-font-mono);
  font-size: .9rem;
  letter-spacing: .08em;
  color: var(--xk-cyan);
}

.page-disclaimer .pd-section__title {
  margin: 0;
  font-size: clamp(1.3rem, 3.4vw, 1.85rem);
  font-weight: 600;
  letter-spacing: .02em;
  line-height: 1.25;
  color: var(--xk-white);
}

.page-disclaimer .pd-section__body p {
  margin: 0 0 1.15em;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--pd-text);
}

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

/* ---------- 引用格式 ---------- */
.page-disclaimer .pd-cite {
  margin-top: 1.75rem;
  padding: 1.1rem 1.15rem 1.25rem;
  border: 1px solid var(--xk-line-soft);
  border-radius: var(--xk-radius-m);
  background: linear-gradient(160deg, rgba(12, 18, 48, .96) 0%, rgba(6, 10, 28, .96) 100%);
}

.page-disclaimer .pd-cite__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .75rem;
  margin-bottom: .35rem;
}

.page-disclaimer .pd-cite__code {
  margin-top: .9rem;
  padding-top: .9rem;
  border-top: 1px dashed var(--xk-line-soft);
  font-family: var(--xk-font-mono);
  font-size: .8125rem;
  line-height: 2;
  color: var(--xk-white);
}

.page-disclaimer .pd-cite__row {
  display: block;
  overflow-wrap: anywhere;
}

.page-disclaimer .pd-cite__row b {
  display: inline-block;
  min-width: 6.5em;
  font-weight: 500;
  color: var(--xk-cyan);
}

/* ---------- 回到顶部 ---------- */
.page-disclaimer .pd-top {
  position: fixed;
  right: clamp(1rem, 3vw, 2rem);
  bottom: clamp(1rem, 3vw, 2rem);
  z-index: 8;
  display: inline-flex;
  align-items: center;
  padding: .55rem .95rem;
  border: 1px solid var(--xk-line-soft);
  border-radius: var(--xk-pill);
  background: rgba(12, 18, 48, .92);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  color: var(--xk-gray);
  font-size: .8125rem;
  letter-spacing: .05em;
  text-decoration: none;
  transition: color .25s var(--xk-ease), border-color .25s var(--xk-ease);
}

.page-disclaimer .pd-top::before {
  content: "↑";
  margin-right: .35rem;
  color: var(--xk-cyan);
  font-family: var(--xk-font-mono);
}

.page-disclaimer .pd-top:hover,
.page-disclaimer .pd-top:focus-visible {
  color: var(--xk-cyan);
  border-color: rgba(59, 240, 208, .55);
}

/* ---------- 响应式 ---------- */
@media (min-width: 900px) {
  .page-disclaimer .pd-summary {
    top: var(--xk-header-h);
  }

  .page-disclaimer .pd-summary__list {
    flex-wrap: wrap;
    overflow-x: visible;
  }

  .page-disclaimer .pd-section {
    scroll-margin-top: calc(var(--xk-header-h) + 7rem);
  }

  .page-disclaimer .pd-hero__title {
    max-width: 18ch;
  }
}

@media (min-width: 1200px) {
  .page-disclaimer .pd-article {
    max-width: 48rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .pd-summary__list a,
  .page-disclaimer .pd-top {
    transition: none;
  }
}