.page-disclaimer {
  --ud-rule: 2px solid rgba(159, 179, 200, 0.26);
  --ud-rule-hard: 2px solid var(--ink);
  --ud-soft: rgba(159, 179, 200, 0.3);
  position: relative;
  padding-bottom: clamp(56px, 9vw, 120px);
  background-image:
    linear-gradient(rgba(159, 179, 200, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(159, 179, 200, 0.055) 1px, transparent 1px);
  background-size: 68px 68px;
  background-position: -1px -1px;
}

.page-disclaimer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 460px;
  background: radial-gradient(circle at 20% 0%, rgba(232, 163, 61, 0.14), transparent 62%);
  pointer-events: none;
}

.page-disclaimer > .container {
  position: relative;
  z-index: 1;
}

/* ---------- 首屏 ---------- */
.page-disclaimer .usage-hero {
  display: grid;
  gap: clamp(16px, 2.4vw, 24px);
  padding-top: clamp(28px, 5vw, 56px);
}

.page-disclaimer .usage-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--gold);
}

.page-disclaimer .usage-hero__eyebrow::before {
  content: "";
  width: 36px;
  height: 2px;
  background: var(--crimson);
}

.page-disclaimer .usage-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(38px, 9vw, 68px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-disclaimer .usage-hero__lede {
  margin: 0;
  max-width: 64ch;
  font-size: clamp(16px, 1.7vw, 18px);
  line-height: 1.85;
  letter-spacing: 0.02em;
  color: var(--white);
  opacity: 0.86;
}

/* ---------- 首屏图 ---------- */
.page-disclaimer .usage-banner {
  position: relative;
  margin: clamp(8px, 1.8vw, 16px) 0 0;
  overflow: hidden;
  border: var(--ud-rule-hard);
  background: var(--night-2);
  box-shadow: var(--shadow-hard);
}

.page-disclaimer .usage-banner img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 5;
  object-fit: cover;
}

.page-disclaimer .usage-banner figcaption {
  padding: 12px 16px;
  border-top: 2px solid var(--ink);
  background: var(--ink);
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
}

/* ---------- 条目跳转 ---------- */
.page-disclaimer .usage-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: clamp(14px, 2.4vw, 22px) 0 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .usage-toc a {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 10px 16px;
  border: 2px solid var(--steel);
  background: transparent;
  color: var(--white);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.page-disclaimer .usage-toc a:hover {
  border-color: var(--gold);
  color: var(--gold);
  transform: translateY(-2px);
}

.page-disclaimer .usage-toc a:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 3px;
}

.page-disclaimer .usage-toc .mono {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gold);
}

/* ---------- 章节通用 ---------- */
.page-disclaimer .usage-section {
  margin-top: clamp(46px, 7vw, 88px);
  padding-top: clamp(24px, 3.6vw, 40px);
  border-top: var(--ud-rule);
  scroll-margin-top: 96px;
}

.page-disclaimer .usage-section__head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-disclaimer .usage-section__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--gold);
}

.page-disclaimer .usage-section__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 5vw, 36px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-disclaimer .usage-section__lede {
  margin: 0;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.85;
  letter-spacing: 0.02em;
  color: var(--steel);
}

.page-disclaimer .usage-section__lede a,
.page-disclaimer .version-card__foot a,
.page-disclaimer .scope-block a,
.page-disclaimer .usage-contact a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-disclaimer .usage-section__lede a:hover,
.page-disclaimer .version-card__foot a:hover,
.page-disclaimer .scope-block a:hover,
.page-disclaimer .usage-contact a:hover {
  color: var(--white);
  border-bottom-color: var(--white);
}

.page-disclaimer .usage-section__lede a:focus-visible,
.page-disclaimer .version-card__foot a:focus-visible,
.page-disclaimer .scope-block a:focus-visible,
.page-disclaimer .usage-contact a:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 3px;
}

/* ---------- 条文列表 ---------- */
.page-disclaimer .rule-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--ud-rule);
}

.page-disclaimer .rule-list > li {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 4px 14px;
  padding: 18px 12px;
  border-bottom: var(--ud-rule);
  transition: background 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
}

.page-disclaimer .rule-list > li:hover,
.page-disclaimer .rule-list > li:focus-within {
  background: var(--night-2);
  border-bottom-color: var(--gold);
  box-shadow: inset 4px 0 0 var(--crimson);
}

.page-disclaimer .rule-list__no {
  grid-column: 1;
  grid-row: 1;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  color: var(--gold);
}

.page-disclaimer .rule-list__title {
  grid-column: 2;
  grid-row: 1;
  margin: 0;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.55;
  color: var(--white);
}

.page-disclaimer .rule-list__body {
  grid-column: 2;
  grid-row: 2;
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  letter-spacing: 0.02em;
  color: var(--steel);
}

/* ---------- 版本布局 ---------- */
.page-disclaimer .usage-version {
  display: grid;
  gap: clamp(22px, 3.4vw, 38px);
}

.page-disclaimer .version-card {
  padding: clamp(20px, 3vw, 30px);
  border: var(--ud-rule-hard);
  background: linear-gradient(155deg, var(--night-2) 0%, var(--night) 80%);
  box-shadow: var(--shadow-hard);
}

.page-disclaimer .version-card__label {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.22em;
  color: var(--gold);
}

.page-disclaimer .version-rows {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .version-rows > li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px dashed var(--ud-soft);
}

.page-disclaimer .version-rows > li:last-child {
  border-bottom: 0;
}

.page-disclaimer .version-rows__key {
  font-size: 14px;
  color: var(--steel);
}

.page-disclaimer .version-rows__val {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--white);
}

.page-disclaimer .version-card__foot {
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: var(--ud-rule);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--steel);
}

/* ---------- 版本号提示 ---------- */
.page-disclaimer .tip {
  position: relative;
  border-bottom: 1px solid var(--gold);
  cursor: help;
  outline: none;
}

.page-disclaimer .tip::after {
  content: attr(data-tip);
  position: absolute;
  left: 0;
  bottom: calc(100% + 10px);
  z-index: 6;
  width: max-content;
  max-width: min(280px, 74vw);
  padding: 10px 12px;
  border: 2px solid var(--gold);
  background: var(--ink);
  color: var(--gold);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;
  line-height: 1.65;
  letter-spacing: 0.02em;
  white-space: normal;
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  pointer-events: none;
}

.page-disclaimer .tip:hover::after,
.page-disclaimer .tip:focus-visible::after {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.page-disclaimer .tip:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 4px;
}

/* ---------- 订阅须知 ---------- */
.page-disclaimer .notice-list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .notice-list > li {
  padding: 18px 18px 18px 20px;
  border-left: 4px solid var(--green);
  background: var(--night-2);
  transition: border-color 0.22s ease, transform 0.22s ease, box-shadow 0.22s ease;
}

.page-disclaimer .notice-list > li:hover,
.page-disclaimer .notice-list > li:focus-within {
  border-left-color: var(--gold);
  transform: translateY(-2px);
  box-shadow: 0 10px 26px rgba(4, 10, 20, 0.5);
}

.page-disclaimer .notice-list__title {
  margin: 0 0 6px;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 16.5px;
  line-height: 1.55;
  color: var(--white);
}

.page-disclaimer .notice-list__body {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  letter-spacing: 0.02em;
  color: var(--steel);
}

/* ---------- 责任范围 ---------- */
.page-disclaimer .scope-block {
  padding: clamp(20px, 3vw, 32px);
  border-left: 6px solid var(--crimson);
  background: var(--night-2);
}

.page-disclaimer .scope-block p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.85;
  letter-spacing: 0.02em;
  color: var(--steel);
}

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

.page-disclaimer .scope-block strong {
  color: var(--white);
  font-weight: 700;
}

/* ---------- 更新通知 ---------- */
.page-disclaimer .update-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--ud-rule);
}

.page-disclaimer .update-list > li {
  position: relative;
  padding: 16px 0 16px 28px;
  border-bottom: var(--ud-rule);
  font-size: 16px;
  line-height: 1.8;
  letter-spacing: 0.02em;
  color: var(--steel);
}

.page-disclaimer .update-list > li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 28px;
  width: 14px;
  height: 2px;
  background: var(--gold);
}

/* ---------- 联系条 ---------- */
.page-disclaimer .usage-contact {
  margin-top: clamp(26px, 3.6vw, 40px);
  padding: clamp(20px, 3vw, 30px);
  border: var(--ud-rule-hard);
  background: var(--sand);
  color: var(--ink);
  box-shadow: var(--shadow-hard);
}

.page-disclaimer .usage-contact__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(20px, 3vw, 24px);
  color: var(--ink);
}

.page-disclaimer .usage-contact p {
  margin: 0 0 10px;
  font-size: 15.5px;
  line-height: 1.8;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-disclaimer .usage-contact a {
  color: var(--crimson);
  border-bottom-color: var(--crimson);
}

.page-disclaimer .usage-contact a:hover {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

.page-disclaimer .usage-contact__meta {
  margin-bottom: 0 !important;
  font-family: var(--font-mono);
  font-size: 13.5px;
  opacity: 0.78;
}

/* ---------- 收尾短评 ---------- */
.page-disclaimer .usage-endnote {
  margin: clamp(34px, 5vw, 56px) 0 0;
  padding-left: 18px;
  border-left: 4px solid var(--crimson);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(18px, 2.6vw, 22px);
  line-height: 1.6;
  color: var(--white);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-disclaimer .rule-list > li {
    grid-template-columns: 48px minmax(140px, 200px) minmax(0, 1fr);
    align-items: start;
    gap: 0 20px;
    padding: 20px 14px;
  }

  .page-disclaimer .rule-list__no {
    grid-column: 1;
    grid-row: 1;
  }

  .page-disclaimer .rule-list__title {
    grid-column: 2;
    grid-row: 1;
  }

  .page-disclaimer .rule-list__body {
    grid-column: 3;
    grid-row: 1;
  }
}

@media (min-width: 940px) {
  .page-disclaimer .usage-version {
    grid-template-columns: minmax(260px, 0.82fr) minmax(0, 1.18fr);
    align-items: start;
  }

  .page-disclaimer .version-card {
    position: sticky;
    top: 96px;
  }
}

@media (max-width: 640px) {
  .page-disclaimer .usage-banner img {
    aspect-ratio: 4 / 3;
  }

  .page-disclaimer .usage-toc a {
    padding: 9px 13px;
    font-size: 13.5px;
  }

  .page-disclaimer .scope-block {
    border-left-width: 5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .usage-toc a,
  .page-disclaimer .rule-list > li,
  .page-disclaimer .notice-list > li,
  .page-disclaimer .tip::after {
    transition: none;
  }

  .page-disclaimer .usage-toc a:hover,
  .page-disclaimer .notice-list > li:hover {
    transform: none;
  }
}