.page-disclaimer {
  --pd-hair: rgba(0, 180, 216, 0.3);
  --pd-hair-soft: rgba(168, 198, 216, 0.22);
  padding-bottom: clamp(64px, 9vw, 120px);
}

/* 顶部刻度线 */
.page-disclaimer::before {
  content: "";
  display: block;
  height: 10px;
  margin-bottom: clamp(20px, 4vw, 36px);
  background-image: repeating-linear-gradient(
    90deg,
    rgba(0, 180, 216, 0.55) 0 1px,
    transparent 1px 20px
  );
  opacity: 0.85;
}

/* ---------- 面包屑 ---------- */
.page-disclaimer .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 clamp(24px, 4vw, 40px);
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-disclaimer .breadcrumbs li + li::before {
  content: "/";
  margin-right: 10px;
  color: var(--rock);
}

.page-disclaimer .breadcrumbs__link {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease-out), border-color 0.2s var(--ease-out);
}

.page-disclaimer .breadcrumbs__link:hover,
.page-disclaimer .breadcrumbs__link:focus-visible {
  color: var(--aqua);
  border-bottom-color: var(--aqua);
}

.page-disclaimer .breadcrumbs__current {
  color: var(--ivory);
}

/* ---------- 首屏 ---------- */
.page-disclaimer .guide-intro {
  max-width: 880px;
  margin-bottom: clamp(36px, 6vw, 64px);
}

.page-disclaimer .guide-title {
  margin: 14px 0 20px;
  font-size: clamp(1.9rem, 6.4vw, 4rem);
  font-weight: 200;
  line-height: 1.12;
  letter-spacing: 0.015em;
  color: var(--ivory);
}

.page-disclaimer .guide-lede {
  margin: 0;
  max-width: 64ch;
  font-size: clamp(1rem, 1.6vw, 1.125rem);
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 章节通用 ---------- */
.page-disclaimer .guide-section {
  position: relative;
}

.page-disclaimer .guide-section .section-title {
  margin-top: 10px;
  margin-bottom: 18px;
}

.page-disclaimer .guide-section .prose {
  max-width: 68ch;
}

.page-disclaimer .guide-section .prose + .prose {
  margin-top: 22px;
}

.page-disclaimer .guide-section a {
  color: var(--water);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 180, 216, 0.45);
  transition: color 0.2s var(--ease-out), border-color 0.2s var(--ease-out);
}

.page-disclaimer .guide-section a:hover,
.page-disclaimer .guide-section a:focus-visible {
  color: var(--aqua);
  border-bottom-color: var(--aqua);
}

/* ---------- 01 引用写法 ---------- */
.page-disclaimer .media-frame {
  margin: 30px 0 0;
}

.page-disclaimer .cite-list {
  max-width: 940px;
  margin: clamp(28px, 4vw, 40px) auto 0;
  display: grid;
  gap: 18px;
}

.page-disclaimer .cite-card {
  padding: 22px 24px 22px 28px;
  border-top: 1px solid var(--pd-hair);
  border-right: 1px solid var(--pd-hair);
  border-bottom: 1px solid var(--pd-hair);
  border-left: 3px solid var(--water);
  border-radius: 0 var(--radius-a) var(--radius-a) 0;
  background: linear-gradient(135deg, rgba(0, 180, 216, 0.09), rgba(11, 29, 58, 0) 64%),
    var(--navy-panel);
}

.page-disclaimer .cite-card__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-disclaimer .cite-card__index {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--aqua);
}

.page-disclaimer .cite-card__title {
  margin: 0;
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ivory);
}

.page-disclaimer .cite-code {
  margin: 16px 0 0;
  padding: 16px 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.85;
  letter-spacing: 0.02em;
  color: var(--ivory);
  background: rgba(5, 15, 30, 0.6);
  border-radius: var(--radius-a);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.page-disclaimer .cite-card__note {
  margin: 14px 0 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 02 使用范围 ---------- */
.page-disclaimer .tier-set {
  margin-top: clamp(26px, 4vw, 36px);
  display: grid;
  gap: 18px;
}

.page-disclaimer .tier {
  border-radius: var(--radius-b);
  padding: 24px 24px 26px;
  border-left: 6px solid transparent;
}

.page-disclaimer .tier__title {
  margin: 0 0 14px;
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.page-disclaimer .tier__list {
  margin: 0;
  padding-left: 1.1em;
  display: grid;
  gap: 8px;
  font-size: 0.9375rem;
  line-height: 1.7;
}

.page-disclaimer .tier__foot {
  margin: 16px 0 0;
  font-size: 0.8125rem;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  opacity: 0.82;
}

.page-disclaimer .tier--free {
  min-height: 220px;
  color: var(--navy);
  background: linear-gradient(150deg, rgba(0, 180, 216, 0.92), rgba(0, 245, 212, 0.58));
  border-left-color: var(--aqua);
}

.page-disclaimer .tier--mark {
  min-height: 176px;
  color: var(--navy);
  background: rgba(168, 198, 216, 0.55);
  border-left-color: var(--rock);
}

.page-disclaimer .tier--ask {
  min-height: 132px;
  color: var(--sand);
  background: var(--clay);
  border-left-color: #8f5038;
}

/* ---------- 03 版本差异 ---------- */
.page-disclaimer .compare {
  margin-top: clamp(26px, 4vw, 36px);
  display: flex;
  gap: 16px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: 14px;
  -webkit-overflow-scrolling: touch;
}

.page-disclaimer .compare__col {
  flex: 0 0 min(84%, 340px);
  scroll-snap-align: start;
  padding: 22px 22px 24px;
  border-radius: var(--radius-a);
  border: 1px solid var(--pd-hair);
  background: rgba(15, 37, 71, 0.72);
}

.page-disclaimer .compare__col--live {
  border-left: 3px solid var(--aqua);
}

.page-disclaimer .compare__col--archive {
  border-left: 3px solid var(--mist);
}

.page-disclaimer .compare__tag {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--aqua);
}

.page-disclaimer .compare__col--archive .compare__tag {
  color: var(--mist);
}

.page-disclaimer .compare__title {
  margin: 10px 0 18px;
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ivory);
}

.page-disclaimer .compare__facts {
  margin: 0;
  display: grid;
  gap: 4px 14px;
}

.page-disclaimer .compare__facts dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-disclaimer .compare__facts dd {
  margin: 0 0 12px;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--ivory);
}

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

/* ---------- 04 勘误 ---------- */
.page-disclaimer .errata-steps {
  margin: clamp(26px, 4vw, 34px) 0 0;
  padding: 0;
  list-style: none;
  counter-reset: pd-step;
  display: grid;
  gap: 14px;
  max-width: 72ch;
}

.page-disclaimer .errata-steps li {
  position: relative;
  counter-increment: pd-step;
  padding-left: 50px;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--sand);
}

.page-disclaimer .errata-steps li::before {
  content: counter(pd-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 3px;
  width: 34px;
  height: 22px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--aqua);
  border: 1px solid rgba(0, 245, 212, 0.42);
  border-radius: 999px;
}

.page-disclaimer .errata-contact {
  margin-top: clamp(28px, 4vw, 36px);
  padding: 22px 24px 24px;
  border-radius: var(--radius-a);
  border: 1px solid rgba(255, 107, 53, 0.42);
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.16), rgba(255, 107, 53, 0.04));
}

.page-disclaimer .errata-contact__label {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--coral);
}

.page-disclaimer .errata-contact__mail {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(1rem, 3.6vw, 1.25rem);
  letter-spacing: 0.04em;
  color: var(--ivory);
  overflow-wrap: anywhere;
}

.page-disclaimer .errata-contact__note {
  margin: 12px 0 0;
  font-size: 0.875rem;
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 05 内容与标识 ---------- */
.page-disclaimer .rule-list {
  margin: clamp(24px, 4vw, 32px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 18px;
  max-width: 74ch;
}

.page-disclaimer .rule-list li {
  position: relative;
  padding-left: 24px;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--navy);
}

.page-disclaimer .rule-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 12px;
  height: 2px;
  border-radius: 2px;
  background: var(--water);
}

.page-disclaimer .rule-list a {
  color: #04688a;
  border-bottom-color: rgba(4, 104, 138, 0.4);
}

.page-disclaimer .rule-list a:hover,
.page-disclaimer .rule-list a:focus-visible {
  color: #0b1d3a;
  border-bottom-color: #0b1d3a;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-disclaimer .tier-set {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-disclaimer .compare {
    overflow: visible;
    padding-bottom: 0;
  }

  .page-disclaimer .compare__col {
    flex: none;
  }
}

@media (min-width: 900px) {
  .page-disclaimer .compare {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }

  .page-disclaimer .cite-card {
    padding: 26px 32px 26px 34px;
  }
}

@media (max-width: 420px) {
  .page-disclaimer .errata-steps li {
    padding-left: 44px;
  }

  .page-disclaimer .compare__col {
    flex-basis: 88%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .breadcrumbs__link,
  .page-disclaimer .guide-section a,
  .page-disclaimer .rule-list a {
    transition: none;
  }
}
<<<END>>>