.page-disclaimer {
  --dc-num-col: 48px;
}

/* 面包屑与首屏 */
.page-disclaimer .dc-hero {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: end;
  padding-block: clamp(20px, 4vw, 48px) clamp(36px, 5vw, 68px);
}

.page-disclaimer .dc-hero__body {
  min-width: 0;
}

.page-disclaimer .dc-hero .eyebrow {
  margin-bottom: 16px;
  color: var(--cyan-400);
  letter-spacing: 0.14em;
}

.page-disclaimer .dc-hero__title {
  margin: 0 0 20px;
  font-family: var(--font-body);
  font-size: clamp(34px, 5.4vw, 64px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--paper-100);
  text-wrap: balance;
}

.page-disclaimer .dc-hero__lede {
  margin: 0;
  max-width: 58ch;
  font-size: var(--step-0);
  line-height: 1.85;
  color: var(--mist-300);
}

.page-disclaimer .dc-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin: 22px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--mist-500);
}

.page-disclaimer .dc-hero__figure {
  margin: 0;
  min-width: 0;
}

.page-disclaimer .dc-hero__figure .media-frame {
  border-radius: var(--radius-a);
  overflow: hidden;
  border: 1px solid var(--line-600);
}

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

.page-disclaimer .dc-hero__figure .figure__cap {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.65;
  color: var(--mist-500);
}

/* 章节骨架 */
.page-disclaimer .dc-section {
  padding-block: clamp(36px, 6vw, 76px);
}

.page-disclaimer .dc-section + .dc-section {
  border-top: 1px solid var(--line-600);
}

.page-disclaimer .dc-head {
  max-width: 62ch;
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-disclaimer .dc-head .eyebrow {
  margin-bottom: 12px;
  color: var(--cyan-400);
  letter-spacing: 0.14em;
}

.page-disclaimer .dc-head h2 {
  margin: 0 0 12px;
  font-size: var(--step-2);
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: -0.005em;
  color: var(--paper-100);
}

.page-disclaimer .dc-head p {
  margin: 0;
  font-size: var(--step-0);
  line-height: 1.8;
  color: var(--mist-300);
}

/* 规则条目清单 */
.page-disclaimer .rule-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-600);
}

.page-disclaimer .rule-item {
  display: grid;
  grid-template-columns: var(--dc-num-col) minmax(0, 1fr);
  column-gap: 14px;
  row-gap: 8px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line-600);
}

.page-disclaimer .rule-item__num {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.95;
  letter-spacing: 0.08em;
  color: var(--cyan-400);
}

.page-disclaimer .rule-item__body {
  min-width: 0;
}

.page-disclaimer .rule-item__body h3 {
  margin: 0 0 6px;
  font-size: var(--step-0);
  font-weight: 600;
  line-height: 1.5;
  color: var(--paper-100);
}

.page-disclaimer .rule-item__body p {
  margin: 0;
  max-width: 54ch;
  font-size: var(--step--1);
  line-height: 1.85;
  color: var(--mist-300);
}

.page-disclaimer .rule-item__note {
  grid-column: 2;
  margin: 0;
  max-width: 40ch;
  font-size: 12px;
  line-height: 1.75;
  color: var(--mist-500);
}

/* 数据出处 */
.page-disclaimer .dc-source {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
}

.page-disclaimer .dc-source__text {
  min-width: 0;
}

.page-disclaimer .dc-source__text p {
  margin: 0 0 14px;
  max-width: 60ch;
  font-size: var(--step-0);
  line-height: 1.85;
  color: var(--mist-300);
}

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

.page-disclaimer .dc-source__text a {
  color: var(--cyan-400);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
  transition: color 0.18s var(--ease);
}

.page-disclaimer .dc-source__text a:hover {
  color: var(--paper-100);
}

.page-disclaimer .dc-source__facts {
  list-style: none;
  margin: 0;
  padding: 20px;
  display: grid;
  gap: 16px;
  align-content: start;
  background: var(--turf-700);
  border: 1px solid var(--line-600);
  border-radius: var(--radius-b);
}

.page-disclaimer .dc-source__facts li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding-top: 14px;
  border-top: 1px solid var(--line-600);
}

.page-disclaimer .dc-source__facts li:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-disclaimer .dc-source__facts .num {
  font-family: var(--font-mono);
  font-size: var(--step-1);
  font-weight: 500;
  line-height: 1.2;
  color: var(--cyan-400);
  white-space: nowrap;
}

.page-disclaimer .dc-source__facts span:last-child {
  font-size: var(--step--1);
  line-height: 1.65;
  color: var(--mist-300);
}

/* 三种使用情形 */
.page-disclaimer .uses {
  display: grid;
  gap: 14px;
}

.page-disclaimer .use-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px 22px;
  background: var(--ink-800);
  border: 1px solid var(--line-600);
  border-radius: var(--radius-a);
  transition: transform 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-disclaimer .use-card:hover {
  transform: translateY(-2px);
  border-color: var(--mist-500);
}

.page-disclaimer .use-card__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mist-500);
}

.page-disclaimer .use-card h3 {
  margin: 0;
  font-size: var(--step-1);
  font-weight: 600;
  line-height: 1.45;
  color: var(--paper-100);
}

.page-disclaimer .use-card p {
  margin: 0;
  font-size: var(--step--1);
  line-height: 1.8;
  color: var(--mist-300);
}

.page-disclaimer .use-card__req {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px dashed var(--line-600);
  font-size: 12px;
  line-height: 1.6;
  color: var(--paper-100);
}

.page-disclaimer .use-card--accent {
  border-color: var(--orange-500);
}

.page-disclaimer .use-card--accent .use-card__kicker {
  color: var(--orange-500);
}

/* 图表引用 */
.page-disclaimer .cite {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
}

.page-disclaimer .cite__text {
  min-width: 0;
}

.page-disclaimer .cite__text p {
  margin: 0 0 14px;
  max-width: 58ch;
  font-size: var(--step-0);
  line-height: 1.85;
  color: var(--mist-300);
}

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

.page-disclaimer .cite__sample {
  padding: 22px 20px;
  border: 1px dashed var(--line-600);
  border-radius: var(--radius-b);
  background: linear-gradient(150deg, rgba(70, 242, 200, 0.08), rgba(6, 18, 14, 0) 64%);
}

.page-disclaimer .cite__line {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: var(--paper-100);
  overflow-wrap: anywhere;
}

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

.page-disclaimer .cite__line span {
  display: inline-block;
  min-width: 3.6em;
  margin-right: 8px;
  color: var(--cyan-400);
}

/* 版本块与收尾 */
.page-disclaimer .version {
  margin-top: clamp(20px, 3vw, 32px);
  background: var(--ink-800);
  border: 1px solid var(--orange-500);
  border-radius: var(--radius-b);
  overflow: hidden;
}

.page-disclaimer .version summary {
  display: flex;
  align-items: baseline;
  gap: 6px 14px;
  padding: 18px 20px;
  list-style: none;
  cursor: pointer;
  font-size: var(--step-0);
  font-weight: 600;
  line-height: 1.6;
  color: var(--paper-100);
  transition: background-color 0.18s var(--ease);
}

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

.page-disclaimer .version summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--orange-500);
}

.page-disclaimer .version[open] summary::after {
  content: "–";
}

.page-disclaimer .version summary:hover {
  background: var(--turf-700);
}

.page-disclaimer .version summary:focus-visible {
  outline: 2px solid var(--orange-500);
  outline-offset: -4px;
}

.page-disclaimer .version__body {
  padding: 0 20px 22px;
}

.page-disclaimer .version__body p {
  margin: 0 0 16px;
  max-width: 58ch;
  font-size: var(--step--1);
  line-height: 1.85;
  color: var(--mist-300);
}

.page-disclaimer .version__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-disclaimer .version__list li {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--line-600);
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist-300);
}

.page-disclaimer .version__list b {
  font-family: var(--font-mono);
  font-weight: 500;
  color: var(--paper-100);
}

.page-disclaimer .dc-cta {
  display: grid;
  gap: 16px;
  margin-top: clamp(24px, 4vw, 36px);
  padding: clamp(22px, 4vw, 36px);
  background: var(--turf-700);
  border-radius: var(--radius-a);
}

.page-disclaimer .dc-cta p {
  margin: 0;
  max-width: 54ch;
  font-size: var(--step-0);
  line-height: 1.8;
  color: var(--paper-100);
}

.page-disclaimer .dc-cta .btn {
  justify-self: start;
  white-space: nowrap;
}

/* 断点 */
@media (min-width: 640px) {
  .page-disclaimer .dc-source__facts li {
    grid-template-columns: 5.5em minmax(0, 1fr);
  }
}

@media (min-width: 820px) {
  .page-disclaimer .uses {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-disclaimer .dc-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-disclaimer .dc-source {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-disclaimer .cite {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-disclaimer .dc-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .page-disclaimer .dc-cta .btn {
    justify-self: end;
  }
}

@media (min-width: 900px) {
  .page-disclaimer {
    --dc-num-col: 64px;
  }

  .page-disclaimer .rule-item {
    grid-template-columns: var(--dc-num-col) minmax(0, 1fr) minmax(0, 0.62fr);
    column-gap: clamp(20px, 3vw, 40px);
    padding: 24px 0;
  }

  .page-disclaimer .rule-item__note {
    grid-column: 3;
    margin-top: 0;
    padding-left: clamp(12px, 2vw, 24px);
    border-left: 1px solid var(--line-600);
  }
}

@media (hover: hover) and (pointer: fine) and (min-width: 900px) {
  .page-disclaimer .rule-item__note {
    opacity: 0.5;
    transition: opacity 0.18s var(--ease);
  }

  .page-disclaimer .rule-item:hover .rule-item__note,
  .page-disclaimer .rule-item:focus-within .rule-item__note {
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .use-card,
  .page-disclaimer .rule-item__note,
  .page-disclaimer .dc-source__text a,
  .page-disclaimer .version summary {
    transition: none;
  }

  .page-disclaimer .use-card:hover {
    transform: none;
  }
}