.page-disclaimer {
  --u-rail: 208px;
  --u-rule: rgba(22, 35, 46, 0.13);
  --u-rule-strong: rgba(22, 35, 46, 0.24);
  background: var(--ink);
  color: var(--paper);
  overflow-x: hidden;
}

/* 面包屑 */
.page-disclaimer .breadcrumb {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(22px, 3vw, 34px) var(--gutter) 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-small);
  color: var(--muted);
}

.page-disclaimer .breadcrumb a {
  color: var(--cream);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: color var(--ease), border-color var(--ease);
}

.page-disclaimer .breadcrumb a:hover,
.page-disclaimer .breadcrumb a:focus-visible {
  color: var(--gold);
  border-color: var(--gold);
}

/* 首屏 */
.page-disclaimer .usage-hero {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(26px, 4vw, 52px) var(--gutter) clamp(30px, 4.5vw, 58px);
  display: grid;
  gap: clamp(26px, 4vw, 54px);
  align-items: end;
}

.page-disclaimer .usage-hero__copy {
  min-width: 0;
}

.page-disclaimer .usage-hero .eyebrow {
  margin: 0 0 14px;
}

.page-disclaimer .usage-hero h1 {
  font-family: var(--font-narrow);
  font-weight: 900;
  font-size: clamp(44px, 10vw, 92px);
  line-height: 0.98;
  letter-spacing: -0.02em;
  margin: 0;
  color: var(--white);
}

.page-disclaimer .usage-hero .lede {
  margin: clamp(18px, 2.4vw, 30px) 0 0;
  max-width: 46ch;
  font-family: var(--font-serif);
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.8;
  color: var(--cream);
}

.page-disclaimer .usage-hero__figure {
  margin: 0;
  position: relative;
  border: 1px solid var(--line);
  background: var(--ink-2);
  overflow: hidden;
}

.page-disclaimer .usage-hero__figure::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(216, 163, 60, 0.16) 0 1px, transparent 1px 28px),
    repeating-linear-gradient(0deg, rgba(42, 70, 88, 0.5) 0 1px, transparent 1px 28px);
  pointer-events: none;
  z-index: 1;
}

.page-disclaimer .usage-hero__figure .figure-img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  opacity: 0.86;
}

.page-disclaimer .usage-hero__figure .figure-cap {
  position: relative;
  z-index: 2;
  margin: 0;
  padding: 12px 16px 14px;
  border-top: 1px solid var(--line);
  background: var(--ink-2);
  font-size: var(--fs-micro);
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* 刻度尺 */
.page-disclaimer .usage-meter {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.page-disclaimer .usage-meter__bar {
  height: 16px;
  border-bottom: 1px solid var(--line);
  background-image: repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 26px);
  background-repeat: repeat-x;
  background-size: 26px 100%;
}

/* 正文外壳 */
.page-disclaimer .usage-body {
  background: var(--paper);
  color: var(--text-dark);
}

.page-disclaimer .usage-body__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(36px, 5.5vw, 84px) var(--gutter) clamp(52px, 7vw, 116px);
  display: grid;
  gap: clamp(26px, 4vw, 60px);
  align-items: start;
}

/* 章节导航 */
.page-disclaimer .usage-toc {
  min-width: 0;
}

.page-disclaimer .usage-toc__title {
  margin: 0 0 14px;
  font-family: var(--font-narrow);
  font-size: var(--fs-micro);
  font-weight: 800;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.page-disclaimer .usage-toc ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0;
}

.page-disclaimer .usage-toc li {
  flex: 0 0 auto;
}

.page-disclaimer .usage-toc a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 16px 10px 14px;
  border-left: 2px solid var(--cream);
  border-bottom: 1px solid var(--u-rule);
  color: var(--text-dark);
  text-decoration: none;
  font-size: 15px;
  line-height: 1.5;
  transition: border-color var(--ease), background var(--ease), color var(--ease);
}

.page-disclaimer .usage-toc a .mono {
  font-size: var(--fs-micro);
  letter-spacing: 0.08em;
  color: var(--muted);
  transition: color var(--ease);
}

.page-disclaimer .usage-toc a:hover,
.page-disclaimer .usage-toc a:focus-visible {
  border-left-color: var(--gold);
  background: var(--cream);
  color: var(--text-dark);
}

.page-disclaimer .usage-toc a:hover .mono,
.page-disclaimer .usage-toc a:focus-visible .mono {
  color: var(--gold);
}

/* 章节正文 */
.page-disclaimer .usage-content {
  min-width: 0;
}

.page-disclaimer .usage-section {
  scroll-margin-top: 92px;
  padding-bottom: clamp(34px, 4.5vw, 62px);
  margin-bottom: clamp(34px, 4.5vw, 62px);
  border-bottom: 1px solid var(--u-rule);
}

.page-disclaimer .usage-section:last-of-type {
  border-bottom: none;
}

.page-disclaimer .usage-section h2 {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 6px;
  font-family: var(--font-narrow);
  font-weight: 800;
  font-size: var(--fs-h3);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--text-dark);
}

.page-disclaimer .usage-section__no {
  font-size: 0.58em;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-disclaimer .usage-section .conclusion {
  margin: 14px 0 0;
  font-family: var(--font-serif);
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.7;
  color: var(--text-dark);
}

.page-disclaimer .usage-section .prose {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: var(--fs-body);
  line-height: 1.85;
  color: #3A4550;
}

/* 条目清单 */
.page-disclaimer .term-list {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
}

.page-disclaimer .term-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 16px;
  row-gap: 6px;
  padding: 18px 14px 18px 14px;
  border-left: 2px solid transparent;
  border-top: 1px solid var(--u-rule);
  transition: border-color var(--ease), background var(--ease);
}

.page-disclaimer .term-item:last-child {
  border-bottom: 1px solid var(--u-rule);
}

.page-disclaimer .term-item:hover,
.page-disclaimer .term-item:focus-within {
  border-left-color: var(--gold);
  background: var(--cream);
}

.page-disclaimer .term-item__no {
  padding-top: 4px;
  font-size: var(--fs-micro);
  letter-spacing: 0.08em;
  color: var(--muted);
  white-space: nowrap;
}

.page-disclaimer .term-item__text {
  margin: 0;
  max-width: 58ch;
  font-size: var(--fs-body);
  line-height: 1.8;
  color: var(--text-dark);
}

.page-disclaimer .term-item__note {
  grid-column: 2;
  margin: 0;
  max-width: 58ch;
  font-size: var(--fs-small);
  line-height: 1.75;
  color: var(--muted);
  opacity: 0.62;
  transition: opacity var(--ease), color var(--ease);
}

.page-disclaimer .term-item:hover .term-item__note,
.page-disclaimer .term-item:focus-within .term-item__note {
  opacity: 1;
  color: #4A4032;
}

/* 延伸入口 */
.page-disclaimer .usage-links {
  margin-top: clamp(30px, 4vw, 52px);
  padding: clamp(22px, 3vw, 32px) clamp(18px, 3vw, 30px);
  background: var(--ink-2);
  border-left: 3px solid var(--gold);
  color: var(--cream);
}

.page-disclaimer .usage-links__lead {
  margin: 0 0 14px;
  font-family: var(--font-narrow);
  font-size: var(--fs-micro);
  font-weight: 800;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-disclaimer .usage-links ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

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

.page-disclaimer .usage-links li:last-child {
  border-bottom: none;
}

.page-disclaimer .usage-links a {
  display: block;
  padding: 12px 4px;
  color: var(--cream);
  text-decoration: none;
  font-size: 16px;
  line-height: 1.6;
  transition: color var(--ease), padding-left var(--ease), background var(--ease);
}

.page-disclaimer .usage-links a:hover,
.page-disclaimer .usage-links a:focus-visible {
  color: var(--gold);
  padding-left: 12px;
  background: rgba(216, 163, 60, 0.07);
}

/* 平板及以上：章节导航固定在左侧 */
@media (min-width: 780px) {
  .page-disclaimer .usage-toc ol {
    display: block;
  }

  .page-disclaimer .usage-toc a {
    border-bottom: none;
  }

  .page-disclaimer .usage-links ul {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 24px;
  }
}

@media (min-width: 960px) {
  .page-disclaimer .usage-hero {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  }

  .page-disclaimer .usage-body__inner {
    grid-template-columns: var(--u-rail) minmax(0, 1fr);
  }

  .page-disclaimer .usage-toc {
    position: sticky;
    top: 30px;
  }
}

@media (min-width: 1200px) {
  .page-disclaimer .usage-body__inner {
    --u-rail: 232px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .usage-toc a,
  .page-disclaimer .term-item,
  .page-disclaimer .term-item__note,
  .page-disclaimer .usage-links a,
  .page-disclaimer .breadcrumb a {
    transition: none;
  }
}