.page-disclaimer {
  --disc-label: 14rem;
  --disc-sticky-offset: calc(var(--header-h) + 3.5rem);
}

/* ---------- 首屏 ---------- */
.page-disclaimer .disc-hero {
  padding-top: clamp(1rem, 3vw, 2rem);
}

.page-disclaimer .disc-hero__grid {
  display: grid;
  gap: 0.75rem;
  margin-top: clamp(1.25rem, 3vw, 2rem);
  margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
}

.page-disclaimer .disc-hero__rail {
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--stone);
  border-left: 1px solid var(--line);
  padding-left: 0.75rem;
}

.page-disclaimer .disc-hero__title h1 {
  margin: 0.45rem 0 1rem;
  max-width: 16ch;
}

.page-disclaimer .disc-hero__lede {
  max-width: 42ch;
}

.page-disclaimer .disc-hero__figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-disclaimer .disc-hero__figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
}

.page-disclaimer .disc-hero__figure .yt-figure__cap {
  margin: 0;
  padding: 0.7rem 0.9rem;
  background: var(--ink-800);
  border-top: 1px solid var(--line);
}

/* ---------- 章节索引条 ---------- */
.page-disclaimer .disc-index {
  position: sticky;
  top: var(--header-h);
  z-index: 6;
  background: var(--glass-strong);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-disclaimer .disc-index__inner {
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.page-disclaimer .disc-index__list {
  display: flex;
  gap: 0.15rem;
  margin: 0;
  padding: 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.page-disclaimer .disc-index__list::-webkit-scrollbar {
  display: none;
}

.page-disclaimer .disc-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.9rem 0.85rem;
  white-space: nowrap;
  font-size: 0.875rem;
  color: var(--text-2);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 150ms var(--ease), border-color 150ms var(--ease), background-color 150ms var(--ease);
}

.page-disclaimer .disc-index__link:hover {
  color: var(--text-1);
  background: var(--glass);
}

.page-disclaimer .disc-index__link.is-active {
  color: var(--text-1);
  border-bottom-color: var(--flag-blue);
}

.page-disclaimer .disc-index__no {
  font-size: 0.75rem;
  color: var(--flag-blue);
  letter-spacing: 0.06em;
}

/* ---------- 条款区块 ---------- */
.page-disclaimer .disc-clause {
  border-top: 1px solid var(--line);
  scroll-margin-top: var(--disc-sticky-offset);
}

.page-disclaimer .disc-clause__grid {
  display: grid;
  gap: 1.1rem;
}

.page-disclaimer .disc-clause__no {
  display: block;
  font-size: 0.8125rem;
  color: var(--flag-blue);
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}

.page-disclaimer .disc-clause__head h2 {
  margin: 0 0 0.55rem;
  font-size: clamp(1.35rem, 2.4vw, 1.75rem);
  line-height: 1.2;
  color: var(--text-1);
}

.page-disclaimer .disc-clause__meta {
  margin: 0;
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--stone);
  line-height: 1.6;
}

.page-disclaimer .disc-clause__body {
  min-width: 0;
}

/* ---------- 条款条目 ---------- */
.page-disclaimer .disc-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-disclaimer .disc-item {
  display: grid;
  grid-template-columns: 2.6rem minmax(0, 1fr);
  gap: 0.75rem;
  padding: 0.95rem 0;
  border-top: 1px solid var(--line);
}

.page-disclaimer .disc-item:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-disclaimer .disc-item__no {
  font-size: 0.75rem;
  color: var(--stone);
  letter-spacing: 0.06em;
  padding-top: 0.3rem;
  text-align: left;
}

.page-disclaimer .disc-item p {
  margin: 0;
  color: var(--text-1);
  line-height: 1.75;
}

.page-disclaimer .disc-item a {
  color: var(--flag-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-disclaimer .disc-item a:hover {
  color: var(--text-1);
}

/* ---------- 折叠补充 ---------- */
.page-disclaimer .disc-fold {
  margin-top: 1.15rem;
  padding: 0.85rem 1rem;
  background: var(--glass);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-disclaimer .disc-fold summary {
  cursor: pointer;
  list-style: none;
  color: var(--text-1);
  font-size: 0.9375rem;
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
}

.page-disclaimer .disc-fold summary::-webkit-details-marker {
  display: none;
}

.page-disclaimer .disc-fold summary::before {
  content: "+";
  font-family: var(--font-data);
  color: var(--flag-blue);
  font-size: 0.875rem;
}

.page-disclaimer .disc-fold[open] summary::before {
  content: "−";
}

.page-disclaimer .disc-fold p {
  margin: 0.8rem 0 0;
  color: var(--text-2);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.page-disclaimer .disc-fold a {
  color: var(--flag-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 引用标注块 ---------- */
.page-disclaimer .disc-quote {
  margin-top: 1.3rem;
  padding: 1.15rem 1.25rem;
  background: var(--flag-white);
  color: var(--ink-800);
  border-radius: var(--radius);
  border-left: 3px solid var(--flag-blue);
}

.page-disclaimer .disc-quote__label {
  display: block;
  font-family: var(--font-data);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-700);
  margin-bottom: 0.6rem;
}

.page-disclaimer .disc-quote p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--ink-900);
  word-break: break-word;
}

/* ---------- 尾部指路 ---------- */
.page-disclaimer .disc-tail__line {
  margin: 0;
  color: var(--text-2);
  line-height: 1.8;
}

.page-disclaimer .disc-tail__line a {
  color: var(--flag-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-disclaimer .disc-tail__line a:hover {
  color: var(--text-1);
}

/* ---------- 焦点可见 ---------- */
.page-disclaimer a:focus-visible,
.page-disclaimer summary:focus-visible {
  outline: 2px solid var(--flag-blue);
  outline-offset: 2px;
  border-radius: var(--radius);
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 720px) {
  .page-disclaimer .disc-item {
    grid-template-columns: 3.2rem minmax(0, 1fr);
    gap: 1rem;
  }

  .page-disclaimer .disc-item p {
    max-width: 40rem;
  }
}

/* ---------- 桌面两列对照 ---------- */
@media (min-width: 960px) {
  .page-disclaimer .disc-hero__grid {
    grid-template-columns: auto minmax(0, 1fr);
    grid-template-areas: "rail title";
    gap: clamp(1.5rem, 3vw, 2.5rem);
    align-items: end;
  }

  .page-disclaimer .disc-hero__rail {
    grid-area: rail;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    align-self: stretch;
    border-left: 0;
    border-right: 1px solid var(--line);
    padding-left: 0;
    padding-right: 0.75rem;
    display: flex;
    align-items: flex-end;
    height: 100%;
  }

  .page-disclaimer .disc-hero__title {
    grid-area: title;
  }

  .page-disclaimer .disc-hero__title h1 {
    max-width: 14ch;
  }

  .page-disclaimer .disc-clause__grid {
    grid-template-columns: var(--disc-label) minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 4.5rem);
    align-items: start;
  }

  .page-disclaimer .disc-clause__head {
    position: sticky;
    top: var(--disc-sticky-offset);
  }

  .page-disclaimer .disc-item__no {
    text-align: right;
  }

  .page-disclaimer .disc-index__link {
    padding: 0.9rem 1rem;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .disc-index__link,
  .page-disclaimer .disc-item,
  .page-disclaimer .disc-fold summary {
    transition: none;
  }
}