/* ============ 使用规范 /usage/ ============ */

.page-disclaimer {
  --u-rule: rgba(147, 173, 166, .22);
  --u-rule-soft: rgba(147, 173, 166, .12);
  --u-code-bg: #04211C;
  --u-body: rgba(242, 246, 241, .78);
  --u-ease: cubic-bezier(.22, .61, .36, 1);

  background: var(--ink-bg);
  color: var(--paper);
  overflow-x: clip;
}

.page-disclaimer a {
  color: var(--tactical);
  text-decoration: none;
}

.page-disclaimer a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-disclaimer a:focus-visible {
  outline: 2px solid var(--tactical);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ---------- 01 首屏 ---------- */

.page-disclaimer .u-hero {
  position: relative;
  padding: calc(var(--header-h) + clamp(26px, 5vw, 60px)) 0 clamp(34px, 6vw, 70px);
  border-bottom: 1px solid var(--u-rule);
  background-image:
    linear-gradient(rgba(147, 173, 166, .055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(147, 173, 166, .055) 1px, transparent 1px);
  background-size: 100% 96px, 96px 100%;
}

.page-disclaimer .u-hero__grid {
  display: grid;
  gap: clamp(28px, 5vw, 48px);
  align-items: start;
}

.page-disclaimer .u-hero h1 {
  margin: 12px 0 0;
  font-size: clamp(30px, 7vw, 56px);
  line-height: 1.1;
  letter-spacing: -.025em;
  font-weight: 800;
}

.page-disclaimer .u-lede {
  margin: 18px 0 0;
  max-width: 44ch;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.85;
  color: var(--u-body);
}

.page-disclaimer .u-facts {
  list-style: none;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: clamp(18px, 3vw, 26px) 0 0;
  border-top: 1px solid var(--u-rule);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 20px;
}

.page-disclaimer .u-facts li {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-disclaimer .u-facts__num {
  font-family: var(--mono);
  font-weight: 800;
  font-size: clamp(22px, 3.2vw, 30px);
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--tactical);
}

.page-disclaimer .u-facts__label {
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--moss);
}

.page-disclaimer .u-hero__media {
  margin: 0;
}

.page-disclaimer .u-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--u-rule);
}

.page-disclaimer .u-hero__media figcaption {
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 11.5px;
  line-height: 1.6;
  letter-spacing: .12em;
  color: var(--moss);
}

/* ---------- 通用区块 ---------- */

.page-disclaimer .u-block {
  padding: clamp(40px, 7vw, 84px) 0;
}

.page-disclaimer .u-block + .u-block {
  border-top: 1px solid var(--u-rule-soft);
}

.page-disclaimer .u-block__head {
  max-width: 62ch;
  margin-bottom: clamp(24px, 4vw, 42px);
}

.page-disclaimer .u-block__head h2 {
  margin: 10px 0 0;
  font-size: clamp(23px, 3.6vw, 36px);
  line-height: 1.22;
  letter-spacing: -.018em;
  font-weight: 800;
}

.page-disclaimer .u-block__intro {
  margin: 14px 0 0;
  max-width: 56ch;
  font-size: clamp(15.5px, 1.4vw, 17px);
  line-height: 1.85;
  color: var(--u-body);
}

/* ---------- 条文清单 ---------- */

.page-disclaimer .u-rules {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--u-rule);
}

.page-disclaimer .u-rule {
  position: relative;
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 14px;
  padding: clamp(20px, 3vw, 30px) 0;
  border-bottom: 1px solid var(--u-rule);
}

.page-disclaimer .u-rule::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: -12px;
  right: -12px;
  background: linear-gradient(90deg, rgba(23, 229, 184, .08), rgba(23, 229, 184, 0) 72%);
  opacity: 0;
  pointer-events: none;
  transition: opacity .22s var(--u-ease);
}

.page-disclaimer .u-rule:hover::before,
.page-disclaimer .u-rule:focus-within::before,
.page-disclaimer .u-rule:focus-visible::before {
  opacity: 1;
}

.page-disclaimer .u-rule:focus-visible {
  outline: 2px solid var(--tactical);
  outline-offset: 2px;
}

.page-disclaimer .u-rule__num {
  font-family: var(--mono);
  font-weight: 800;
  font-size: 24px;
  line-height: 1.15;
  letter-spacing: -.03em;
  color: var(--tactical);
  opacity: .55;
  transition: opacity .22s var(--u-ease);
}

.page-disclaimer .u-rule:hover .u-rule__num,
.page-disclaimer .u-rule:focus-within .u-rule__num,
.page-disclaimer .u-rule:focus-visible .u-rule__num {
  opacity: 1;
}

.page-disclaimer .u-rule__body {
  min-width: 0;
}

.page-disclaimer .u-rule__top {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 14px;
}

.page-disclaimer .u-rule__title {
  flex: 1 1 auto;
  margin: 0;
  font-size: clamp(16.5px, 1.9vw, 20px);
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: -.006em;
}

.page-disclaimer .u-rule__tag {
  flex: 0 0 auto;
}

.page-disclaimer .u-rule__body p {
  margin: 10px 0 0;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.82;
  color: var(--u-body);
}

.page-disclaimer .u-sample {
  margin: 14px 0 0;
  padding: 12px 14px;
  background: var(--u-code-bg);
  border-left: 3px solid var(--tactical);
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.75;
  letter-spacing: .01em;
  color: var(--tactical-soft);
  overflow-wrap: anywhere;
}

.page-disclaimer .u-sample code {
  font-family: inherit;
  font-size: inherit;
}

/* ---------- 03 反例说明区（明暗反转） ---------- */

.page-disclaimer .u-counter {
  background: var(--print);
  color: var(--ink-bg);
  border-top: 4px solid var(--amber);
  border-bottom: 1px solid var(--u-rule);
  padding: clamp(38px, 6.5vw, 76px) 0;
}

.page-disclaimer .u-counter .section-index {
  color: rgba(5, 35, 30, .58);
}

.page-disclaimer .u-counter h2 {
  margin: 10px 0 0;
  max-width: 22ch;
  font-size: clamp(22px, 3.4vw, 34px);
  font-weight: 800;
  line-height: 1.24;
  letter-spacing: -.018em;
  color: var(--ink-bg);
}

.page-disclaimer .u-counter__intro {
  margin: 14px 0 0;
  max-width: 52ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(5, 35, 30, .72);
}

.page-disclaimer .u-counter__list {
  list-style: none;
  margin: clamp(24px, 4vw, 38px) 0 0;
  padding: 0;
}

.page-disclaimer .u-counter__list li {
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr);
  gap: 12px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(5, 35, 30, .16);
}

.page-disclaimer .u-counter__list li:first-child {
  border-top: 1px solid rgba(5, 35, 30, .16);
}

.page-disclaimer .u-counter__mark {
  font-family: var(--mono);
  font-weight: 800;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-bg);
}

.page-disclaimer .u-counter__list p {
  margin: 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(5, 35, 30, .88);
}

/* ---------- 07 联系 ---------- */

.page-disclaimer .u-contact__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--u-rule);
  border: 1px solid var(--u-rule);
}

.page-disclaimer .u-contact__item {
  background: var(--ink-bg);
  padding: clamp(18px, 3vw, 26px);
}

.page-disclaimer .u-contact__label {
  margin: 0;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--moss);
}

.page-disclaimer .u-contact__value {
  margin: 10px 0 0;
  font-size: clamp(16px, 1.8vw, 19px);
  font-weight: 700;
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.page-disclaimer .u-contact__note {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--u-body);
}

.page-disclaimer .u-contact__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px 24px;
  margin-top: clamp(26px, 4vw, 40px);
  padding-top: 20px;
  border-top: 1px solid var(--u-rule);
}

.page-disclaimer .u-contact__foot p {
  margin: 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--u-body);
}

.page-disclaimer .u-contact__icp {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--moss);
}

.page-disclaimer .u-top-link {
  display: inline-block;
  margin-top: 22px;
  padding-bottom: 3px;
  border-bottom: 1px solid var(--u-rule);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--moss);
}

.page-disclaimer .u-top-link:hover {
  color: var(--tactical);
  border-color: var(--tactical);
}

/* ---------- 桌面 ---------- */

@media (min-width: 860px) {
  .page-disclaimer .u-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(320px, .92fr);
    gap: clamp(32px, 5vw, 64px);
  }

  .page-disclaimer .u-hero__media {
    margin-top: clamp(6px, 2vw, 20px);
  }

  .page-disclaimer .u-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-disclaimer .u-rule {
    grid-template-columns: clamp(64px, 7vw, 96px) minmax(0, 1fr);
    gap: clamp(20px, 3vw, 40px);
    align-items: start;
  }

  .page-disclaimer .u-rule__num {
    font-size: clamp(30px, 3.6vw, 44px);
  }

  .page-disclaimer .u-counter__list li {
    grid-template-columns: 30px minmax(0, 1fr);
    gap: 18px;
  }

  .page-disclaimer .u-contact__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .u-rule::before,
  .page-disclaimer .u-rule__num {
    transition: none;
  }
}