.page-disclaimer {
  --season: var(--spring);
  --season-accent: var(--spring-accent);
  --usage-num-col: 4.25rem;
  --usage-note-col: 15rem;
}

.page-disclaimer [data-season="spring"] {
  --season: var(--spring);
  --season-accent: var(--spring-accent);
}

.page-disclaimer [data-season="summer"] {
  --season: var(--summer);
  --season-accent: var(--summer-accent);
}

.page-disclaimer [data-season="autumn"] {
  --season: var(--autumn);
  --season-accent: var(--autumn-accent);
}

.page-disclaimer [data-season="winter"] {
  --season: var(--winter);
  --season-accent: var(--autumn-accent);
}

/* 首屏：无 Hero，直接进入主题声明与目录 */
.page-disclaimer .usage-intro__inner {
  display: grid;
  gap: 2.25rem;
  align-items: start;
}

.page-disclaimer .usage-intro h1 {
  font-family: var(--font-serif);
  font-size: clamp(2.125rem, 7.5vw, 3.625rem);
  line-height: 1.18;
  letter-spacing: 0.01em;
  color: var(--winter);
  margin: 0.4rem 0 1rem;
}

.page-disclaimer .usage-intro .sk-lede {
  max-width: var(--measure);
  font-size: 1.0625rem;
  line-height: 1.9;
  color: var(--body);
  margin: 0;
}

.page-disclaimer .usage-meta {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.75rem;
  margin: 1.75rem 0 0;
  padding: 0;
}

.page-disclaimer .usage-meta__item {
  border: var(--line);
  border-left: 3px solid var(--season);
  background: var(--paper);
  padding: 0.35rem 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--muted);
}

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

.page-disclaimer .usage-intro__figure .sk-figure__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

/* 目录索引 */
.page-disclaimer .usage-toc__title {
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 3.6vw, 1.625rem);
  color: var(--winter);
  margin: 0 0 1.25rem;
}

.page-disclaimer .usage-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--line);
}

.page-disclaimer .usage-toc__item {
  border-bottom: var(--line);
}

.page-disclaimer .usage-toc__link {
  display: flex;
  align-items: baseline;
  gap: 0.875rem;
  padding: 0.9rem 0.35rem;
  color: var(--winter);
  text-decoration: none;
  font-size: 1rem;
  line-height: 1.6;
  transition: background-color 0.18s ease, color 0.18s ease;
}

.page-disclaimer .usage-toc__link:hover,
.page-disclaimer .usage-toc__link:focus-visible {
  background: var(--frost);
  color: var(--season);
}

.page-disclaimer .usage-toc__link[aria-current="true"] {
  background: var(--frost);
  color: var(--season);
  font-weight: 600;
}

.page-disclaimer .usage-toc__num {
  min-width: 2.25rem;
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--season);
}

/* 条款正文 */
.page-disclaimer .usage-clause {
  display: grid;
  gap: 1.5rem;
  border-top: 4px solid var(--season);
  padding-top: 1.75rem;
}

.page-disclaimer .usage-clause__num {
  font-size: 1.75rem;
  line-height: 1;
  letter-spacing: 0.1em;
  color: var(--season);
  margin: 0;
}

.page-disclaimer .usage-clause__title {
  font-family: var(--font-serif);
  font-size: clamp(1.375rem, 4.2vw, 1.875rem);
  line-height: 1.35;
  color: var(--winter);
  margin: 0 0 0.9rem;
}

.page-disclaimer .usage-clause__main > p {
  max-width: var(--measure);
  margin: 0 0 1rem;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--body);
}

.page-disclaimer .usage-bullets {
  list-style: none;
  margin: 0.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
  max-width: var(--measure);
}

.page-disclaimer .usage-bullets li {
  position: relative;
  padding-left: 1.5rem;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--body);
}

.page-disclaimer .usage-bullets li::before {
  content: "";
  position: absolute;
  left: 0.1rem;
  top: 0.72em;
  width: 0.5rem;
  height: 0.5rem;
  background: var(--season-accent);
  transform: rotate(45deg);
}

.page-disclaimer .usage-bullets a {
  color: var(--season);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.page-disclaimer .usage-bullets a:hover,
.page-disclaimer .usage-bullets a:focus-visible {
  color: var(--winter);
}

.page-disclaimer .usage-clause .sk-disclosure {
  max-width: var(--measure);
  margin-top: 1.25rem;
}

/* 右侧短注解 */
.page-disclaimer .usage-clause__note {
  border-left: 2px solid var(--season-accent);
  padding-left: 1rem;
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-disclaimer .usage-clause__note-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--season);
  margin: 0 0 0.5rem;
}

.page-disclaimer .usage-clause__note p {
  margin: 0 0 0.5rem;
}

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

.page-disclaimer .usage-clause__note a {
  color: var(--season);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.page-disclaimer .usage-clause__note a:hover,
.page-disclaimer .usage-clause__note a:focus-visible {
  color: var(--winter);
}

/* 桌面：左侧编号 + 主文 + 右侧短注解的三级层次 */
@media (min-width: 56rem) {
  .page-disclaimer .usage-intro__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: 3.5rem;
    align-items: center;
  }

  .page-disclaimer .usage-toc__list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 3.5rem;
  }

  .page-disclaimer .usage-clause {
    grid-template-columns: var(--usage-num-col) minmax(0, 1fr) var(--usage-note-col);
    column-gap: 2.5rem;
    row-gap: 0;
    align-items: start;
  }

  .page-disclaimer .usage-clause__num {
    font-size: 2.25rem;
    padding-top: 0.2rem;
  }

  .page-disclaimer .usage-clause__note {
    padding-top: 0.35rem;
  }
}

/* 打印：保留条款与编号，去掉导航型内容 */
@media print {
  .page-disclaimer .usage-toc,
  .page-disclaimer .usage-intro__figure {
    display: none;
  }

  .page-disclaimer .usage-clause {
    break-inside: avoid;
    border-top-color: #000;
  }

  .page-disclaimer .usage-clause__num,
  .page-disclaimer .usage-clause__note-title {
    color: #000;
  }

  .page-disclaimer .usage-clause__note {
    border-left-color: #000;
    color: #000;
  }
}