.page-disclaimer {
  --u-line: rgba(154, 179, 204, .22);
  --u-grid: rgba(154, 179, 204, .06);
  --u-gap: clamp(18px, 3.6vw, 40px);
}

.page-disclaimer .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding-top: clamp(20px, 4vw, 36px);
  font-size: 13px;
  color: var(--c-mist);
}

.page-disclaimer .crumbs a {
  color: var(--c-mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-disclaimer .crumbs a:hover,
.page-disclaimer .crumbs a:focus-visible {
  color: var(--c-orange);
  border-bottom-color: var(--c-orange);
}

.page-disclaimer .crumbs [aria-current="page"] {
  color: var(--c-ice);
}

/* ---------- 首屏 ---------- */
.page-disclaimer .usage-hero {
  padding-top: clamp(22px, 4vw, 48px);
}

.page-disclaimer .usage-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 52px);
  align-items: start;
}

.page-disclaimer .usage-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(38px, 8vw, 84px);
  line-height: .98;
  letter-spacing: .01em;
  color: var(--c-ice);
}

.page-disclaimer .usage-hero .lead {
  margin: clamp(16px, 2vw, 24px) 0 0;
  max-width: 60ch;
  font-size: clamp(16px, 1.7vw, 19px);
  line-height: 1.85;
  color: var(--c-ice);
  opacity: .88;
}

.page-disclaimer .hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 28px);
  margin: clamp(26px, 3.4vw, 44px) 0 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .hero-stats li {
  display: grid;
  gap: 6px;
  padding-top: 12px;
  border-top: 2px solid var(--c-orange);
}

.page-disclaimer .hero-stats .stat__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 38px);
  line-height: 1;
  font-weight: 700;
  color: var(--c-ice);
  white-space: nowrap;
}

.page-disclaimer .hero-stats .unit {
  margin-left: .12em;
  font-size: .5em;
  color: var(--c-mist);
}

.page-disclaimer .hero-stats .stat__num--live {
  color: var(--c-neon);
}

.page-disclaimer .hero-stats .stat__label {
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--c-mist);
}

/* ---------- 目录浮岛 ---------- */
.page-disclaimer .usage-toc {
  padding: clamp(18px, 2.6vw, 26px);
}

.page-disclaimer .usage-toc__title {
  margin: 0 0 12px;
  font-size: 13px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--c-orange);
}

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

.page-disclaimer .usage-toc__list a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 9px 10px;
  font-size: 15px;
  color: var(--c-ice);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: background .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease);
}

.page-disclaimer .usage-toc__list a:hover,
.page-disclaimer .usage-toc__list a:focus-visible {
  background: rgba(255, 107, 44, .12);
  border-left-color: var(--c-orange);
  color: #fff;
}

.page-disclaimer .toc-no {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-orange);
}

/* ---------- 横幅 ---------- */
.page-disclaimer .usage-banner {
  margin: clamp(30px, 4.5vw, 60px) 0 0;
}

.page-disclaimer .usage-banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  filter: saturate(.85) contrast(1.05);
  border-top: 2px solid var(--c-orange);
}

.page-disclaimer .usage-banner figcaption {
  margin-top: 12px;
}

/* ---------- 条款区 ---------- */
.page-disclaimer .clauses {
  margin-top: clamp(38px, 6vw, 76px);
  padding: clamp(20px, 3vw, 40px) 0 clamp(10px, 2vw, 20px);
  background-image:
    linear-gradient(var(--u-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--u-grid) 1px, transparent 1px);
  background-size: 48px 48px;
}

.page-disclaimer .clause {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(12px, 2vw, 22px);
  padding: clamp(22px, 3vw, 36px) 0;
  border-top: 1px solid var(--u-line);
}

.page-disclaimer .clause__head {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: baseline;
  gap: 14px;
  cursor: pointer;
  list-style: none;
}

.page-disclaimer .clause__head::-webkit-details-marker {
  display: none;
}

.page-disclaimer .clause__head:focus-visible {
  outline: 2px solid var(--c-neon);
  outline-offset: 4px;
}

.page-disclaimer .clause__no {
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.4vw, 30px);
  font-weight: 700;
  line-height: 1;
  color: var(--c-orange);
}

.page-disclaimer .clause__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(19px, 2.4vw, 27px);
  line-height: 1.25;
  color: var(--c-ice);
}

.page-disclaimer .clause__chev {
  position: relative;
  width: 14px;
  height: 14px;
  align-self: center;
  border-right: 2px solid var(--c-mist);
  border-bottom: 2px solid var(--c-mist);
  transform: rotate(45deg);
  transform-origin: 60% 60%;
  transition: transform .24s var(--ease), border-color .24s var(--ease);
}

.page-disclaimer .clause[open] .clause__chev {
  transform: rotate(-135deg);
  border-color: var(--c-orange);
}

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

.page-disclaimer .clause__list li {
  position: relative;
  padding-left: 24px;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: var(--c-ice);
}

.page-disclaimer .clause__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 12px;
  height: 2px;
  background: var(--c-orange);
}

.page-disclaimer .clause__list a {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px dashed rgba(47, 214, 255, .55);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-disclaimer .clause__list a:hover,
.page-disclaimer .clause__list a:focus-visible {
  color: var(--c-orange);
  border-bottom-color: var(--c-orange);
}

.page-disclaimer .clause--paper {
  --u-line: rgba(16, 27, 42, .16);
  margin-block: clamp(20px, 3.4vw, 40px);
  padding: clamp(24px, 3.2vw, 40px) clamp(20px, 3vw, 40px);
  border-top: 0;
  background: var(--c-paper);
  color: var(--c-ink);
  clip-path: polygon(0 0, calc(100% - 30px) 0, 100% 30px, 100% 100%, 30px 100%, 0 calc(100% - 30px));
}

.page-disclaimer .clause--paper .clause__title,
.page-disclaimer .clause--paper .clause__list li {
  color: var(--c-ink);
}

.page-disclaimer .clause--paper .clause__no {
  color: #B93F14;
}

.page-disclaimer .clause--paper .clause__list a {
  color: var(--c-arena);
  border-bottom-color: rgba(10, 26, 47, .35);
}

.page-disclaimer .clause--paper .clause__list a:hover,
.page-disclaimer .clause--paper .clause__list a:focus-visible {
  color: #B93F14;
  border-bottom-color: #B93F14;
}

/* ---------- 延伸阅读 ---------- */
.page-disclaimer .more-pages {
  margin-top: clamp(44px, 6vw, 80px);
}

.page-disclaimer .link-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: clamp(16px, 2.2vw, 26px);
}

.page-disclaimer .link-card {
  display: grid;
  gap: 8px;
  padding: clamp(18px, 2.4vw, 24px);
  background: var(--c-midnight);
  border: 1px solid var(--u-line);
  color: var(--c-ice);
  text-decoration: none;
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
  transition: transform .24s var(--ease), border-color .24s var(--ease), background .24s var(--ease);
}

.page-disclaimer .link-card:hover,
.page-disclaimer .link-card:focus-visible {
  transform: translateY(-6px);
  border-color: var(--c-orange);
  background: #16314F;
}

.page-disclaimer .link-card__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  line-height: 1.3;
}

.page-disclaimer .link-card__desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-mist);
}

.page-disclaimer .closing-note {
  margin: clamp(32px, 4.5vw, 56px) 0 clamp(30px, 5vw, 70px);
  padding-left: 14px;
  border-left: 2px solid var(--c-orange);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-disclaimer .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 960px) {
  .page-disclaimer .usage-hero__grid {
    grid-template-columns: minmax(0, 1.62fr) minmax(0, 1fr);
  }

  .page-disclaimer .usage-toc {
    position: sticky;
    top: 120px;
  }
}

@media (min-width: 1024px) {
  .page-disclaimer .clause {
    grid-template-columns: minmax(220px, 27%) minmax(0, 1fr);
    gap: var(--u-gap);
  }

  .page-disclaimer .clause__head {
    align-content: start;
    grid-template-columns: auto 1fr;
    gap: 12px;
    position: sticky;
    top: 118px;
    align-self: start;
  }

  .page-disclaimer .clause__chev {
    grid-column: 1 / -1;
    justify-self: start;
    margin-top: 6px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .link-card,
  .page-disclaimer .clause__chev,
  .page-disclaimer .usage-toc__list a {
    transition: none;
  }

  .page-disclaimer .link-card:hover,
  .page-disclaimer .link-card:focus-visible {
    transform: none;
  }
}