.page-disclaimer {
  --u-radius: 4px;
  --u-gap: clamp(16px, 3vw, 26px);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-disclaimer .mono {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
}

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

.page-disclaimer a:hover {
  color: var(--terracotta);
}

/* —— 首屏：折页说明的分屏 —— */
.page-disclaimer .usage-hero {
  padding: clamp(22px, 5vw, 64px) 0 clamp(30px, 6vw, 64px);
  background: linear-gradient(180deg, var(--paper-deep) 0%, var(--paper) 82%);
  border-bottom: var(--crease);
}

.page-disclaimer .usage-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 44px);
  align-items: start;
}

.page-disclaimer .usage-hero-copy .breadcrumb {
  margin-bottom: 18px;
}

.page-disclaimer .usage-hero-copy h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 7vw, 54px);
  line-height: 1.16;
  letter-spacing: -0.012em;
  margin: 10px 0 0;
}

.page-disclaimer .usage-lede {
  margin: 18px 0 0;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.9;
  color: var(--ink-soft);
  max-width: 34em;
}

.page-disclaimer .usage-hero-meta {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-disclaimer .usage-hero-meta li {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding-top: 10px;
  border-top: var(--crease);
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-disclaimer .usage-hero-meta .mono {
  color: var(--terracotta);
  font-weight: 700;
  flex: none;
}

.page-disclaimer .usage-hero-figure {
  margin: 0;
}

.page-disclaimer .usage-hero-figure .media-frame {
  border-radius: var(--u-radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.page-disclaimer .usage-hero-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.9) contrast(1.02);
}

.page-disclaimer .usage-hero-figure .media-caption {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--stone);
}

/* —— 折叠目录 —— */
.page-disclaimer .usage-toc-wrap {
  padding-top: clamp(18px, 3vw, 30px);
}

.page-disclaimer .usage-toc {
  background: var(--paper-deep);
  border: var(--crease);
  border-radius: var(--u-radius);
  padding: 4px clamp(14px, 3vw, 22px);
}

.page-disclaimer .usage-toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-disclaimer .usage-toc-list li + li a {
  border-top: var(--crease);
}

.page-disclaimer .usage-toc-list a {
  display: flex;
  gap: 14px;
  align-items: baseline;
  padding: 11px 0;
  font-size: 15px;
  text-decoration: none;
  color: var(--indigo);
  transition: color 200ms var(--ease-out), padding-left 200ms var(--ease-out);
}

.page-disclaimer .usage-toc-list a:hover {
  color: var(--terracotta);
  padding-left: 6px;
}

.page-disclaimer .usage-toc-list .mono {
  color: var(--terracotta);
  flex: none;
}

/* —— 通用区块 —— */
.page-disclaimer .usage-section {
  padding: clamp(40px, 7vw, 88px) 0;
}

.page-disclaimer .usage-section + .usage-section {
  border-top: var(--crease);
}

.page-disclaimer .usage-head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(20px, 3.4vw, 34px);
  max-width: 46em;
}

.page-disclaimer .usage-head h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(23px, 4vw, 36px);
  line-height: 1.24;
  margin: 0;
}

.page-disclaimer .usage-sub {
  margin: 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink-soft);
  max-width: 38em;
}

/* —— 第一节：三类场景 —— */
.page-disclaimer .usage-points {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--u-gap);
}

.page-disclaimer .usage-point {
  background: var(--sand);
  border-radius: var(--u-radius);
  padding: clamp(18px, 3vw, 24px);
  box-shadow: var(--shadow-card);
  transition: transform 220ms var(--ease-out), box-shadow 220ms var(--ease-out);
}

.page-disclaimer .usage-point:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 0 rgba(36, 28, 23, 0.08), 0 16px 32px -20px rgba(36, 28, 23, 0.6);
}

.page-disclaimer .usage-point-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 2px;
  background: var(--terracotta);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.06em;
  margin-bottom: 14px;
}

.page-disclaimer .usage-point h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  line-height: 1.4;
}

.page-disclaimer .usage-point p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-disclaimer .usage-section .note {
  margin-top: clamp(20px, 3vw, 28px);
  max-width: 46em;
}

/* —— 第二节：版本号 —— */
.page-disclaimer .usage-version {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3.5vw, 36px);
  align-items: start;
}

.page-disclaimer .usage-version-badge {
  display: grid;
  gap: 6px;
  padding: clamp(20px, 3.4vw, 28px);
  border-radius: var(--u-radius);
  background: var(--slate-deep);
  color: var(--paper);
  box-shadow: var(--shadow-card);
}

.page-disclaimer .usage-version-label,
.page-disclaimer .usage-version-date {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--terracotta-soft);
}

.page-disclaimer .usage-version-date {
  color: rgba(246, 240, 228, 0.72);
}

.page-disclaimer .usage-version-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(52px, 12vw, 88px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-disclaimer .usage-version-title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
}

.page-disclaimer .usage-version-rules {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-disclaimer .usage-version-rules li {
  display: flex;
  gap: 12px;
  align-items: baseline;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
  padding-bottom: 12px;
  border-bottom: var(--crease);
}

.page-disclaimer .usage-version-rules .mono {
  flex: none;
  min-width: 2.6em;
  color: var(--terracotta);
  font-weight: 700;
  font-size: 14px;
}

.page-disclaimer .usage-history {
  border: var(--crease);
  border-radius: var(--u-radius);
  padding: 4px clamp(14px, 3vw, 20px);
  background: var(--paper-deep);
}

.page-disclaimer .usage-version-tip {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--stone);
}

/* —— 第三节：注意事项（青灰长块） —— */
.page-disclaimer .usage-section--slate {
  background: var(--slate);
  color: var(--paper);
  border-top: none;
  border-bottom: none;
}

.page-disclaimer .usage-section--slate .usage-head h2 {
  color: var(--paper);
}

.page-disclaimer .usage-section--slate .usage-sub,
.page-disclaimer .usage-section--slate .eyebrow {
  color: rgba(246, 240, 228, 0.82);
}

.page-disclaimer .usage-caution {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.6vw, 22px);
}

.page-disclaimer .usage-caution-item {
  padding: 4px 0 4px clamp(14px, 2.4vw, 20px);
  border-left: 3px solid var(--terracotta-soft);
}

.page-disclaimer .usage-caution-item h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  line-height: 1.45;
  display: flex;
  gap: 10px;
  align-items: baseline;
  color: var(--paper);
}

.page-disclaimer .usage-caution-item .mono {
  color: var(--terracotta-soft);
  font-weight: 700;
}

.page-disclaimer .usage-caution-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(246, 240, 228, 0.86);
}

/* —— 第四节：两列对照 —— */
.page-disclaimer .usage-compare {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 30px);
  position: relative;
}

.page-disclaimer .usage-cmp-col {
  border-radius: var(--u-radius);
  padding: clamp(18px, 3vw, 28px);
  box-shadow: var(--shadow-card);
  transition: opacity 220ms var(--ease-out), transform 220ms var(--ease-out);
}

.page-disclaimer .usage-cmp-col--self {
  background: var(--sand);
  color: var(--ink);
}

.page-disclaimer .usage-cmp-col--help {
  background: var(--slate-deep);
  color: var(--paper);
}

.page-disclaimer .usage-cmp-tag {
  display: inline-block;
  margin: 0 0 10px;
  padding: 3px 9px;
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
}

.page-disclaimer .usage-cmp-col--self .usage-cmp-tag {
  background: var(--terracotta);
  color: var(--paper);
}

.page-disclaimer .usage-cmp-col--help .usage-cmp-tag {
  background: var(--terracotta-soft);
  color: var(--slate-deep);
}

.page-disclaimer .usage-cmp-col h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(19px, 2.6vw, 22px);
  font-weight: 800;
  line-height: 1.4;
}

.page-disclaimer .usage-cmp-col ul {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-disclaimer .usage-cmp-col li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.8;
}

.page-disclaimer .usage-cmp-col li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 10px;
  height: 2px;
  border-radius: 2px;
  background: var(--terracotta);
}

.page-disclaimer .usage-cmp-col--help li::before {
  background: var(--terracotta-soft);
}

.page-disclaimer .usage-cmp-col--help li {
  color: rgba(246, 240, 228, 0.9);
}

.page-disclaimer .usage-compare:has(.usage-cmp-col:hover) .usage-cmp-col:not(:hover) {
  opacity: 0.66;
}

.page-disclaimer .usage-compare-note {
  margin: clamp(18px, 3vw, 26px) 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--stone);
  max-width: 40em;
}

/* —— 第五节：引用与转载 —— */
.page-disclaimer .usage-quote {
  background: var(--paper-deep);
  border: var(--crease);
  border-left: 4px solid var(--terracotta);
  border-radius: var(--u-radius);
  padding: clamp(18px, 3vw, 28px);
}

.page-disclaimer .usage-quote-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  counter-reset: q;
}

.page-disclaimer .usage-quote-list li {
  position: relative;
  padding-left: 30px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
  counter-increment: q;
}

.page-disclaimer .usage-quote-list li::before {
  content: counter(q, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.1em;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--terracotta);
}

.page-disclaimer .usage-quote-ask {
  margin: 18px 0 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink-soft);
  max-width: 40em;
}

/* —— 收束条 —— */
.page-disclaimer .usage-end {
  padding: clamp(24px, 5vw, 56px) 0 clamp(40px, 7vw, 88px);
}

.page-disclaimer .usage-endbar {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
  padding: clamp(26px, 4.5vw, 44px) clamp(18px, 4vw, 34px);
  border-radius: var(--u-radius);
  background: var(--slate-deep);
  color: var(--paper);
  box-shadow: var(--shadow-card);
}

.page-disclaimer .usage-endbar-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(20px, 3.4vw, 28px);
  line-height: 1.35;
}

.page-disclaimer .usage-endbar-text {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(246, 240, 228, 0.8);
}

.page-disclaimer .usage-endbar-actions {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.page-disclaimer .usage-endbar .btn--ghost {
  border-color: rgba(246, 240, 228, 0.5);
  color: var(--paper);
}

.page-disclaimer .usage-endbar .btn--ghost:hover {
  border-color: var(--paper);
  color: var(--paper);
}

/* —— 平板与桌面 —— */
@media (min-width: 720px) {
  .page-disclaimer .usage-hero-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.86fr);
    align-items: center;
  }

  .page-disclaimer .usage-points,
  .page-disclaimer .usage-caution {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-disclaimer .usage-version {
    grid-template-columns: minmax(200px, 0.7fr) minmax(0, 1.6fr);
  }

  .page-disclaimer .usage-toc-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(16px, 3vw, 32px);
  }

  .page-disclaimer .usage-toc-list li + li a {
    border-top: var(--crease);
  }
}

@media (min-width: 960px) {
  .page-disclaimer .usage-points {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-disclaimer .usage-caution {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(28px, 4vw, 52px);
  }

  .page-disclaimer .usage-compare {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }

  .page-disclaimer .usage-compare::before {
    content: "";
    position: absolute;
    top: 6px;
    bottom: 6px;
    left: 50%;
    width: 1px;
    background: linear-gradient(180deg, rgba(125, 139, 192, 0), rgba(125, 139, 192, 0.9), rgba(125, 139, 192, 0));
  }

  .page-disclaimer .usage-section--slate .usage-head {
    max-width: 42em;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .usage-point,
  .page-disclaimer .usage-cmp-col,
  .page-disclaimer .usage-toc-list a {
    transition: opacity 160ms linear;
    transform: none;
  }

  .page-disclaimer .usage-point:hover {
    transform: none;
  }
}