.page-disclaimer {
  --dc-rail-width: 168px;
  --dc-panel-bg: color-mix(in srgb, var(--color-surface) 88%, var(--color-primary-soft));
  position: relative;
  padding-bottom: var(--section-y);
  background:
    radial-gradient(860px 520px at 8% -6%, color-mix(in srgb, var(--color-primary) 20%, transparent), transparent 68%),
    radial-gradient(720px 460px at 94% 4%, color-mix(in srgb, var(--color-accent) 11%, transparent), transparent 66%),
    var(--color-surface);
}

.page-disclaimer .breadcrumb {
  padding-top: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}

.page-disclaimer .breadcrumb a {
  color: var(--color-ink-soft);
  text-decoration: none;
  border-bottom: var(--border-thin) solid transparent;
  transition: border-color 200ms cubic-bezier(0.2, 0.7, 0.2, 1), color 200ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

.page-disclaimer .breadcrumb a:hover {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.page-disclaimer .breadcrumb span[aria-hidden="true"] {
  padding-inline: var(--space-1);
  color: var(--color-line);
}

/* 开篇横幅 */
.page-disclaimer .dc-banner {
  position: relative;
  margin: var(--space-3) 0 var(--space-6);
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: var(--border-thin) solid var(--color-line);
  box-shadow: var(--shadow-2);
  background: var(--color-contrast-surface);
}

.page-disclaimer .dc-banner img {
  display: block;
  width: 100%;
  height: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  object-position: center;
}

.page-disclaimer .dc-banner .media__scrim {
  position: absolute;
  inset: 0;
  background: var(--overlay-scrim);
}

.page-disclaimer .dc-banner .media__body {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-3);
}

.page-disclaimer .dc-banner__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-contrast-accent);
}

.page-disclaimer .dc-banner__title {
  margin: 0;
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: 1.25;
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
}

.page-disclaimer .dc-banner__lead {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: 1.7;
  color: color-mix(in srgb, var(--color-contrast-ink) 82%, transparent);
}

/* 双栏骨架 */
.page-disclaimer .dc-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
}

/* 条款锚点窄栏 */
.page-disclaimer .dc-rail__caption {
  margin: 0 0 var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-ink-muted);
}

.page-disclaimer .dc-rail__list {
  display: flex;
  gap: var(--space-1);
  margin: 0;
  padding: 0 0 var(--space-1);
  overflow-x: auto;
  list-style: none;
  scrollbar-width: thin;
}

.page-disclaimer .dc-rail__link {
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding: 6px 10px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--color-surface) 75%, transparent);
  white-space: nowrap;
  text-decoration: none;
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  transition: border-color 200ms cubic-bezier(0.2, 0.7, 0.2, 1),
    background-color 200ms cubic-bezier(0.2, 0.7, 0.2, 1),
    color 200ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

.page-disclaimer .dc-rail__no {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-primary);
}

.page-disclaimer .dc-rail__link:hover {
  border-color: color-mix(in srgb, var(--color-primary) 46%, var(--color-line));
  background: var(--color-primary-soft);
  color: var(--color-ink);
}

.page-disclaimer .dc-rail__link:focus-visible,
.page-disclaimer .cite-spec__item:focus-visible,
.page-disclaimer .clause__head:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

/* 条款分组刻度标题 */
.page-disclaimer .dc-group-block + .dc-group-block {
  margin-top: var(--space-8);
}

.page-disclaimer .dc-group {
  display: grid;
  grid-template-columns: auto auto minmax(24px, 1fr);
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.page-disclaimer .dc-group__index {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-ink-muted);
}

.page-disclaimer .dc-group__title {
  margin: 0;
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: 1.3;
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-disclaimer .dc-ticks {
  height: 7px;
  border-bottom: var(--border-thin) solid var(--color-line);
  background-image: repeating-linear-gradient(90deg, var(--color-line) 0 1px, transparent 1px 12px);
  background-repeat: repeat-x;
  background-position: left bottom;
  background-size: 100% 7px;
}

/* 条款折叠单元 */
.page-disclaimer .clause {
  margin-bottom: var(--space-2);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--dc-panel-bg);
  box-shadow: var(--shadow-1);
  transition: border-color 240ms cubic-bezier(0.2, 0.7, 0.2, 1),
    box-shadow 240ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

.page-disclaimer .clause:hover {
  border-color: color-mix(in srgb, var(--color-primary) 34%, var(--color-line));
  box-shadow: var(--shadow-2);
}

.page-disclaimer .clause__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 2px var(--space-2);
  align-items: baseline;
  padding: var(--space-3);
  cursor: pointer;
  list-style: none;
}

.page-disclaimer .clause__head::-webkit-details-marker {
  display: none;
}

.page-disclaimer .clause__head::after {
  grid-column: 3;
  align-self: center;
  width: 8px;
  height: 8px;
  border-right: 1.5px solid var(--color-ink-muted);
  border-bottom: 1.5px solid var(--color-ink-muted);
  transform: rotate(45deg);
  transition: transform 240ms cubic-bezier(0.2, 0.7, 0.2, 1);
  content: "";
}

.page-disclaimer .clause[open] .clause__head::after {
  transform: rotate(225deg);
}

.page-disclaimer .clause__no {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  white-space: nowrap;
  color: var(--color-primary);
}

.page-disclaimer .clause__title {
  margin: 0;
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: 1.4;
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-disclaimer .clause__gist {
  grid-column: 2 / 4;
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink-muted);
}

.page-disclaimer .clause__body {
  padding: 0 var(--space-3) var(--space-3);
  border-top: var(--border-thin) solid color-mix(in srgb, var(--color-line) 62%, transparent);
  padding-top: var(--space-2);
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-disclaimer .clause__body p {
  margin: 0 0 var(--space-2);
}

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

.page-disclaimer .clause__body a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--color-primary) 55%, transparent);
  transition: border-color 200ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

.page-disclaimer .clause__body a:hover {
  border-bottom-color: var(--color-accent);
}

/* 引用三要素面板 */
.page-disclaimer .cite-spec {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-2);
  margin: var(--space-3) 0;
}

.page-disclaimer .cite-spec__item {
  padding: var(--space-2);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--color-primary-soft) 62%, var(--color-surface));
  transition: border-color 220ms cubic-bezier(0.2, 0.7, 0.2, 1),
    box-shadow 220ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

.page-disclaimer .cite-spec__item:hover,
.page-disclaimer .cite-spec__item:focus-within {
  border-color: color-mix(in srgb, var(--color-primary) 52%, var(--color-line));
  box-shadow: var(--shadow-1);
}

.page-disclaimer .cite-spec__key {
  margin: 0 0 6px;
  padding-bottom: 6px;
  border-bottom: var(--border-thin) dashed color-mix(in srgb, var(--color-primary) 40%, transparent);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--color-accent);
}

.page-disclaimer .cite-spec__desc {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink);
}

.page-disclaimer .cite-spec__sample {
  max-height: 0;
  margin: 0;
  overflow: hidden;
  opacity: 0;
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-soft);
  transition: max-height 260ms cubic-bezier(0.2, 0.7, 0.2, 1),
    opacity 260ms cubic-bezier(0.2, 0.7, 0.2, 1),
    margin-top 260ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

.page-disclaimer .cite-spec__item:hover .cite-spec__sample,
.page-disclaimer .cite-spec__item:focus-within .cite-spec__sample {
  max-height: 140px;
  margin-top: var(--space-1);
  opacity: 1;
}

/* 深色责任条款 */
.page-disclaimer .clause--deep {
  border-color: var(--color-contrast-line);
  background: var(--color-contrast-surface);
  box-shadow: var(--shadow-2);
}

.page-disclaimer .clause--deep:hover {
  border-color: color-mix(in srgb, var(--color-contrast-accent) 55%, var(--color-contrast-line));
}

.page-disclaimer .clause--deep .clause__no {
  color: var(--color-contrast-accent);
}

.page-disclaimer .clause--deep .clause__title {
  color: var(--color-contrast-ink);
}

.page-disclaimer .clause--deep .clause__gist {
  color: color-mix(in srgb, var(--color-contrast-ink) 70%, transparent);
}

.page-disclaimer .clause--deep .clause__head::after {
  border-right-color: var(--color-contrast-accent);
  border-bottom-color: var(--color-contrast-accent);
}

.page-disclaimer .clause--deep .clause__body {
  border-top-color: var(--color-contrast-line);
  color: var(--color-contrast-ink);
}

/* 联系方式清单 */
.page-disclaimer .dc-contact {
  margin: var(--space-3) 0 0;
  display: grid;
  gap: 1px;
  background: color-mix(in srgb, var(--color-line) 70%, transparent);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.page-disclaimer .dc-contact__row {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: var(--space-2);
  padding: 10px var(--space-2);
  background: var(--color-surface-alt);
}

.page-disclaimer .dc-contact__key {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

.page-disclaimer .dc-contact__val {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink);
  overflow-wrap: anywhere;
}

/* 响应式 */
@media (min-width: 640px) {
  .page-disclaimer .dc-banner img {
    aspect-ratio: 16 / 9;
  }

  .page-disclaimer .dc-banner .media__body {
    padding: var(--space-6) var(--space-6) var(--space-4);
    gap: var(--space-2);
  }

  .page-disclaimer .dc-banner__title {
    font-size: var(--text-3xl);
  }

  .page-disclaimer .dc-banner__lead {
    font-size: var(--text-base);
  }

  .page-disclaimer .clause__head,
  .page-disclaimer .clause__body {
    padding-inline: var(--space-4);
  }
}

@media (min-width: 900px) {
  .page-disclaimer .dc-layout {
    grid-template-columns: var(--dc-rail-width) minmax(0, 1fr);
    gap: var(--space-8);
    align-items: start;
  }

  .page-disclaimer .dc-rail {
    position: sticky;
    top: var(--space-8);
  }

  .page-disclaimer .dc-rail__list {
    flex-direction: column;
    gap: 2px;
    padding-bottom: 0;
    overflow: visible;
  }

  .page-disclaimer .dc-rail__link {
    border-color: transparent;
    background: transparent;
    border-radius: var(--radius-sm);
    padding: 7px 10px;
  }

  .page-disclaimer .dc-rail__link:hover {
    border-color: var(--color-line);
    background: color-mix(in srgb, var(--color-surface-alt) 82%, transparent);
  }

  .page-disclaimer .dc-banner__title {
    font-size: var(--text-4xl);
    max-width: 22ch;
  }

  .page-disclaimer .dc-banner__lead {
    max-width: 52ch;
  }
}

@media (hover: none) {
  .page-disclaimer .cite-spec__sample {
    max-height: none;
    margin-top: var(--space-1);
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .clause,
  .page-disclaimer .clause__head::after,
  .page-disclaimer .cite-spec__item,
  .page-disclaimer .dc-rail__link,
  .page-disclaimer .clause__body a {
    transition: none;
  }

  .page-disclaimer .cite-spec__sample {
    max-height: none;
    margin-top: var(--space-1);
    opacity: 1;
    transition: none;
  }
}