.page-disclaimer {
  --usage-stride: clamp(48px, 7vw, 96px);
  position: relative;
}

/* ---------- 首屏 ---------- */
.page-disclaimer .usage-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 4vw, 44px) 0 clamp(44px, 7vw, 88px);
}

.page-disclaimer .usage-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(104deg, var(--deep-dive) 0 28%, transparent 28%),
    linear-gradient(104deg, var(--deep-sea) 0 44%, transparent 44%);
}

.page-disclaimer .usage-hero > .wrap {
  position: relative;
  z-index: 1;
}

.page-disclaimer .usage-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 48px);
  align-items: end;
  margin-top: clamp(24px, 4vw, 44px);
}

.page-disclaimer .usage-hero__eyebrow {
  margin: 0 0 14px;
  font-size: 0.72rem;
  letter-spacing: 0.24em;
  color: var(--cyan);
  text-transform: uppercase;
}

.page-disclaimer .usage-hero__title {
  margin: 0 0 18px;
  font-size: clamp(30px, 6vw, 60px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: 0.03em;
  color: var(--ice);
  max-width: 18ch;
}

.page-disclaimer .usage-hero__lede {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.85;
  color: var(--mist);
}

.page-disclaimer .usage-hero__panel {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-disclaimer .usage-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(16px, 2.4vw, 24px) clamp(12px, 2vw, 20px);
  background: rgba(7, 11, 18, 0.86);
}

.page-disclaimer .usage-hero__num {
  font-size: clamp(26px, 4vw, 42px);
  font-weight: 700;
  line-height: 1;
  color: var(--alert);
}

.page-disclaimer .usage-hero__cap {
  font-size: 0.76rem;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--mist);
}

/* ---------- 索引条 ---------- */
.page-disclaimer .anchor-bar {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(11, 32, 54, 0.5);
}

.page-disclaimer .anchor-bar__list {
  scrollbar-width: thin;
}

/* ---------- 模块骨架 ---------- */
.page-disclaimer .usage-sec {
  border-top: 1px solid var(--line);
  padding: var(--usage-stride) 0;
}

.page-disclaimer .usage-sec:first-of-type {
  border-top: 0;
}

.page-disclaimer .usage-sec__head {
  display: grid;
  gap: 12px;
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-disclaimer .usage-sec__head .section__title {
  font-size: clamp(22px, 3.6vw, 38px);
  line-height: 1.28;
  letter-spacing: 0.02em;
  color: var(--ice);
  margin: 0;
}

.page-disclaimer .usage-sec__head .section__lede {
  margin: 0;
  font-size: clamp(15px, 1.3vw, 17px);
  line-height: 1.85;
  color: var(--mist);
}

.page-disclaimer .usage-sec__head .section__eyebrow {
  margin: 0;
  color: var(--mist);
  letter-spacing: 0.16em;
  font-size: 0.74rem;
}

.page-disclaimer .usage-sec__head .section__eyebrow span {
  color: var(--cyan);
  font-family: var(--font-mono);
  margin-right: 0.6em;
}

/* ---------- 版本模块珠光分区 ---------- */
.page-disclaimer #versioning {
  background-color: rgba(15, 90, 78, 0.2);
}

/* ---------- 对照检查表 ---------- */
.page-disclaimer .chk {
  border-top: 1px solid var(--line);
}

.page-disclaimer .chk__head {
  display: none;
}

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

.page-disclaimer .chk__row {
  display: grid;
  grid-template-columns: 2.6rem minmax(0, 1fr);
  border-bottom: 1px solid var(--line);
  transition: background-color 0.18s var(--ease);
}

.page-disclaimer .chk__idx {
  grid-column: 1;
  grid-row: 1 / span 2;
  padding: 18px 8px 18px 0;
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  color: var(--mist);
  transition: color 0.18s var(--ease);
}

.page-disclaimer .chk__cell {
  padding: 16px 0 16px 16px;
  border-left: 1px solid var(--line);
  font-size: 0.96rem;
  line-height: 1.78;
  color: var(--ice);
  transition: border-color 0.18s var(--ease);
}

.page-disclaimer .chk__cell p {
  margin: 0;
}

.page-disclaimer .chk__cell--do {
  grid-column: 2;
  grid-row: 1;
}

.page-disclaimer .chk__cell--risk {
  grid-column: 2;
  grid-row: 2;
  border-top: 1px dashed var(--line);
  color: var(--mist);
}

.page-disclaimer .chk__tag {
  display: inline-block;
  margin-right: 0.6em;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  vertical-align: 0.06em;
}

.page-disclaimer .chk__cell--do .chk__tag {
  color: var(--cyan);
}

.page-disclaimer .chk__cell--risk .chk__tag {
  color: var(--alert);
}

/* ---------- 对比示意图 ---------- */
.page-disclaimer .usage-figure {
  margin: 0 0 clamp(24px, 4vw, 40px);
  border: 1px solid var(--line);
  background: var(--deep-sea);
}

.page-disclaimer .usage-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-disclaimer .usage-figure figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 后续入口 ---------- */
.page-disclaimer .usage-next {
  border-top: 1px solid var(--line);
  padding: var(--usage-stride) 0 clamp(64px, 9vw, 120px);
  background: rgba(11, 32, 54, 0.42);
}

.page-disclaimer .usage-next__title {
  margin: 0 0 clamp(20px, 3vw, 32px);
  font-size: clamp(20px, 2.8vw, 30px);
  letter-spacing: 0.03em;
  color: var(--ice);
}

.page-disclaimer .usage-next__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-disclaimer .usage-next__link {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 56px;
  padding: 22px 20px 24px;
  background: var(--ink-black);
  border-top: 1px solid transparent;
  color: var(--ice);
  text-decoration: none;
  transition: background-color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-disclaimer .usage-next__link:hover,
.page-disclaimer .usage-next__link:focus-visible {
  background: var(--deep-sea);
  border-top-color: var(--cyan);
}

.page-disclaimer .usage-next__idx {
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--alert);
}

.page-disclaimer .usage-next__name {
  font-size: 1.06rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-disclaimer .usage-next__desc {
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 880px) {
  .page-disclaimer .usage-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(32px, 5vw, 80px);
  }

  .page-disclaimer .usage-sec__head {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    column-gap: clamp(32px, 5vw, 80px);
    align-items: end;
  }

  .page-disclaimer .usage-sec__head .section__eyebrow {
    grid-column: 1 / -1;
  }

  .page-disclaimer .usage-sec__head .section__title {
    grid-column: 1;
  }

  .page-disclaimer .usage-sec__head .section__lede {
    grid-column: 2;
  }

  .page-disclaimer .chk__head {
    display: grid;
    grid-template-columns: 2.6rem minmax(0, 1fr) minmax(0, 1fr);
    border-bottom: 1px solid var(--line);
  }

  .page-disclaimer .chk__head span {
    padding: 12px 0 12px 16px;
    border-left: 1px solid var(--line);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.18em;
    color: var(--mist);
  }

  .page-disclaimer .chk__head span:nth-child(1) {
    grid-column: 2;
  }

  .page-disclaimer .chk__head span:nth-child(2) {
    grid-column: 3;
  }

  .page-disclaimer .chk__row {
    grid-template-columns: 2.6rem minmax(0, 1fr) minmax(0, 1fr);
  }

  .page-disclaimer .chk__idx {
    grid-column: 1;
    grid-row: 1;
    padding-top: 20px;
  }

  .page-disclaimer .chk__cell--do {
    grid-column: 2;
    grid-row: 1;
  }

  .page-disclaimer .chk__cell--risk {
    grid-column: 3;
    grid-row: 1;
    border-top: 0;
  }

  .page-disclaimer .chk__tag {
    display: none;
  }

  .page-disclaimer .chk__row:hover {
    background: rgba(18, 59, 92, 0.32);
  }

  .page-disclaimer .chk__row:hover .chk__idx {
    color: var(--cyan);
  }

  .page-disclaimer .chk__row:hover .chk__cell--do {
    border-left-color: var(--cyan);
  }

  .page-disclaimer .chk__row:hover .chk__cell--risk {
    border-left-color: var(--alert);
  }

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

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .chk__row,
  .page-disclaimer .chk__cell,
  .page-disclaimer .chk__idx,
  .page-disclaimer .usage-next__link {
    transition: none;
  }
}
</main>