.page-disclaimer {
  --usage-rule: rgba(11, 44, 77, 0.12);
  --usage-rule-strong: rgba(11, 44, 77, 0.22);
  background: var(--seagull);
  color: var(--ink);
  padding-bottom: clamp(48px, 8vw, 104px);
}

.page-disclaimer .breadcrumb {
  padding-top: clamp(20px, 3vw, 32px);
}

/* ---------- 题头斜向色带 ---------- */
.page-disclaimer .usage-hero {
  position: relative;
  margin-top: clamp(16px, 2.5vw, 28px);
  overflow: hidden;
}

.page-disclaimer .usage-hero__band {
  position: absolute;
  inset: 0 0 auto 0;
  height: 100%;
  background:
    linear-gradient(118deg, var(--night) 0%, var(--deep) 46%, rgba(11, 44, 77, 0) 78%),
    linear-gradient(118deg, rgba(18, 227, 198, 0.16) 0%, rgba(18, 227, 198, 0) 42%);
  clip-path: polygon(0 0, 100% 0, 100% 62%, 0 92%);
}

.page-disclaimer .usage-hero::after {
  content: "";
  position: absolute;
  right: -6%;
  top: 8%;
  width: 46%;
  height: 62%;
  border-radius: 50%;
  background: radial-gradient(circle at 40% 40%, rgba(18, 227, 198, 0.22), rgba(18, 227, 198, 0) 68%);
  pointer-events: none;
}

.page-disclaimer .usage-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  padding: clamp(32px, 6vw, 72px) 0 clamp(40px, 7vw, 88px);
}

.page-disclaimer .usage-hero__eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-disclaimer .usage-hero__eyebrow b {
  color: var(--violet);
  font-weight: 700;
}

.page-disclaimer .usage-hero h1 {
  margin: 0 0 20px;
  font-size: clamp(2rem, 5.4vw, 3.6rem);
  font-weight: 300;
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--seagull);
  max-width: 22ch;
}

.page-disclaimer .usage-hero__lede {
  margin: 0;
  max-width: 60ch;
  font-size: 17px;
  line-height: 1.8;
  color: rgba(246, 248, 249, 0.78);
}

.page-disclaimer .usage-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.page-disclaimer .usage-hero__meta .data-chip {
  background: rgba(246, 248, 249, 0.1);
  color: rgba(246, 248, 249, 0.86);
  border: 1px solid rgba(246, 248, 249, 0.18);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-disclaimer .usage-hero__meta .tag {
  background: var(--violet);
  color: var(--seagull);
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  font-size: 11px;
  letter-spacing: 0.14em;
}

.page-disclaimer .usage-hero__figure {
  margin: 0;
}

.page-disclaimer .usage-hero__frame {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(246, 248, 249, 0.16);
  box-shadow: 0 24px 60px rgba(6, 26, 46, 0.36);
  background: var(--night);
}

.page-disclaimer .usage-hero__frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 7 / 4;
  object-fit: cover;
}

.page-disclaimer .usage-hero__figure figcaption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(246, 248, 249, 0.6);
  max-width: 46ch;
}

/* ---------- 双栏正文 ---------- */
.page-disclaimer .usage-body {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
  margin-top: clamp(40px, 6vw, 72px);
}

.page-disclaimer .usage-index {
  align-self: start;
  padding: 22px 22px 24px;
  border-radius: var(--radius-md);
  background: var(--mineral);
  border: 1px solid var(--usage-rule);
}

.page-disclaimer .usage-index__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--moss);
  text-transform: uppercase;
}

.page-disclaimer .usage-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-disclaimer .usage-index__list a {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 9px 10px;
  border-radius: var(--radius-sm);
  color: var(--ink);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.5;
  border-left: 2px solid transparent;
  transition: background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}

.page-disclaimer .usage-index__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--rock);
  letter-spacing: 0.06em;
}

.page-disclaimer .usage-index__list a:hover,
.page-disclaimer .usage-index__list a:focus-visible {
  background: rgba(255, 106, 69, 0.1);
  border-left-color: var(--coral);
}

.page-disclaimer .usage-index__list a:hover .usage-index__num,
.page-disclaimer .usage-index__list a:focus-visible .usage-index__num {
  color: var(--coral);
}

.page-disclaimer .usage-index__hint {
  margin: 16px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--rock);
}

.page-disclaimer .usage-content {
  display: grid;
  gap: clamp(36px, 5vw, 60px);
}

/* ---------- 条款条目 ---------- */
.page-disclaimer .usage-section {
  padding-top: clamp(20px, 3vw, 28px);
  border-top: 1px solid var(--usage-rule-strong);
}

.page-disclaimer .usage-section__eyebrow {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--moss);
}

.page-disclaimer .usage-section__eyebrow b {
  color: var(--violet);
  font-weight: 700;
}

.page-disclaimer .usage-section__title {
  margin: 0 0 18px;
  font-size: clamp(1.4rem, 2.4vw, 2rem);
  font-weight: 600;
  line-height: 1.28;
  color: var(--ink);
}

.page-disclaimer .usage-section__claim {
  margin: 0 0 8px;
  font-size: clamp(1.05rem, 1.5vw, 1.2rem);
  font-weight: 600;
  line-height: 1.6;
  color: var(--deep);
  border-bottom: 1px solid var(--cyan);
  display: inline;
  box-shadow: inset 0 -1px 0 var(--cyan);
  padding-bottom: 2px;
}

.page-disclaimer .usage-section__text {
  margin: 18px 0 0;
  max-width: 68ch;
  font-size: 17px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-disclaimer .usage-section__text a,
.page-disclaimer .usage-section__claim a {
  color: var(--deep);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan);
  padding-bottom: 1px;
}

.page-disclaimer .usage-section__text a:hover,
.page-disclaimer .usage-section__text a:focus-visible {
  border-bottom-width: 2px;
}

.page-disclaimer .usage-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-disclaimer .usage-list li {
  position: relative;
  padding: 12px 16px 12px 18px;
  border-radius: var(--radius-sm);
  background: var(--mineral);
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--rock);
}

.page-disclaimer .usage-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 3px;
  border-radius: var(--radius-pill);
  background: var(--cyan);
}

.page-disclaimer .usage-list li b {
  display: block;
  margin-bottom: 2px;
  color: var(--deep);
  font-weight: 600;
  font-size: 15px;
}

.page-disclaimer .usage-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

/* ---------- 桌面端双栏 ---------- */
@media (min-width: 900px) {
  .page-disclaimer .usage-hero__inner {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
  }

  .page-disclaimer .usage-body {
    grid-template-columns: 260px minmax(0, 1fr);
    align-items: start;
  }

  .page-disclaimer .usage-index {
    position: sticky;
    top: 108px;
  }
}

@media (min-width: 1440px) {
  .page-disclaimer .usage-body {
    grid-template-columns: 288px minmax(0, 1fr);
    column-gap: 72px;
  }

  .page-disclaimer .usage-section__text {
    max-width: 72ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .usage-index__list a {
    transition: none;
  }
}
</page_disclaimer>