.page-disclaimer{
  --u-rule: rgba(74,106,96,.42);
  --u-rule-faint: rgba(74,106,96,.20);
  --u-measure: 62ch;
  background: var(--ink);
  color: var(--body-text);
  overflow-x: hidden;
}

.page-disclaimer a{
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}
.page-disclaimer a:hover{
  color: var(--warm);
}

/* ---------- 首屏 ---------- */
.page-disclaimer .usage-hero{
  position: relative;
  padding: clamp(22px,4vw,44px) 0 clamp(30px,5vw,58px);
  background:
    radial-gradient(115% 85% at 88% -18%, rgba(0,240,192,.11), transparent 62%),
    radial-gradient(85% 65% at -6% 108%, rgba(255,106,26,.09), transparent 70%),
    var(--ink);
}
.page-disclaimer .usage-hero__inner{
  display: grid;
  gap: clamp(22px,4vw,48px);
  grid-template-columns: minmax(0,1fr);
  align-items: end;
}
.page-disclaimer .usage-hero__title{
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.9rem,5.4vw,3.5rem);
  line-height: 1.06;
  letter-spacing: -.02em;
  color: var(--warm);
  text-wrap: balance;
}
.page-disclaimer .usage-hero__mark{
  display: inline-block;
  color: var(--cyan);
  border-bottom: 3px solid var(--orange);
  padding-bottom: 2px;
}
.page-disclaimer .usage-hero__lead{
  margin: 18px 0 0;
  max-width: 54ch;
  color: var(--body-text);
  font-size: clamp(.95rem,1.6vw,1.05rem);
  line-height: 1.78;
}
.page-disclaimer .usage-hero__meta{
  margin: 0;
  display: grid;
  gap: 10px;
  border-left: 1px solid var(--u-rule);
  padding-left: 16px;
}
.page-disclaimer .usage-hero__meta-row{
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 12px;
}
.page-disclaimer .usage-hero__meta dt{
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mist);
  min-width: 5.5em;
}
.page-disclaimer .usage-hero__meta dd{
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(.9rem,2vw,1.05rem);
  color: var(--cyan);
  letter-spacing: -.01em;
}
.page-disclaimer .usage-hero__figure{
  margin: clamp(22px,4vw,38px) 0 0;
}
.page-disclaimer .usage-hero__figure .img-frame{
  box-shadow: 0 18px 40px -28px rgba(0,0,0,.9);
}
.page-disclaimer .img-frame img{
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}
.page-disclaimer .usage-hero__figure .img-frame__cap{
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--mist);
}

/* ---------- 刻度装饰线 ---------- */
.page-disclaimer .usage-ruler{
  height: 12px;
  border-top: 1px solid var(--u-rule);
  border-bottom: 1px solid var(--u-rule-faint);
  background-image: repeating-linear-gradient(90deg, var(--u-rule) 0 1px, transparent 1px 15px);
  background-repeat: repeat-x;
  background-size: auto 6px;
  background-position: 0 0;
  opacity: .85;
}

/* ---------- 主体骨架 ---------- */
.page-disclaimer .usage-body{
  padding-top: clamp(26px,4vw,48px);
  padding-bottom: clamp(40px,6vw,80px);
}
.page-disclaimer .usage-layout{
  display: grid;
  grid-template-columns: minmax(0,1fr);
  gap: clamp(28px,4vw,56px);
}

/* ---------- 章节 ---------- */
.page-disclaimer .usage-sec{
  padding: clamp(26px,4vw,44px) 0;
  border-top: 1px solid var(--u-rule-faint);
}
.page-disclaimer .usage-sec:first-child{
  border-top: 0;
  padding-top: 0;
}
.page-disclaimer .usage-sec__head{
  display: grid;
  grid-template-columns: auto minmax(0,1fr);
  gap: clamp(12px,2vw,22px);
  align-items: start;
}
.page-disclaimer .usage-sec__num{
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.6rem,4.6vw,2.9rem);
  line-height: .92;
  letter-spacing: -.04em;
  color: var(--mist);
  opacity: .78;
  padding-top: 2px;
}
.page-disclaimer .usage-sec__title{
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(1.14rem,2.6vw,1.5rem);
  line-height: 1.24;
  letter-spacing: -.01em;
  color: var(--warm);
  text-wrap: balance;
}
.page-disclaimer .usage-sec__sum{
  margin: 16px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--cyan);
  font-size: .92rem;
  line-height: 1.6;
  color: var(--warm);
  max-width: var(--u-measure);
}
.page-disclaimer .usage-sec__body{
  margin-top: 20px;
  max-width: var(--u-measure);
}
.page-disclaimer .usage-sec__body p{
  margin: 0 0 14px;
  font-size: 1rem;
  line-height: 1.78;
  color: var(--body-text);
}
.page-disclaimer .usage-sec__body p:last-child{
  margin-bottom: 0;
}
.page-disclaimer .usage-sec__body strong{
  color: var(--warm);
  font-weight: 700;
}

/* ---------- 列表（方形符号） ---------- */
.page-disclaimer .usage-list{
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 9px;
}
.page-disclaimer .usage-list li{
  position: relative;
  padding-left: 20px;
  font-size: .95rem;
  line-height: 1.7;
  color: var(--body-text);
}
.page-disclaimer .usage-list li::before{
  content: "";
  position: absolute;
  left: 0;
  top: .63em;
  width: 7px;
  height: 7px;
  background: var(--cyan);
}
.page-disclaimer .usage-list--free li::before{
  background: var(--mist);
  opacity: .75;
}

/* ---------- 引用示例块 ---------- */
.page-disclaimer .usage-sample{
  margin: 18px 0 6px;
  padding: 16px 18px;
  border: 1px solid var(--u-rule);
  border-left: 2px solid var(--cyan);
  background: linear-gradient(180deg, var(--ink-2), rgba(14,43,35,.55));
  display: grid;
  gap: 4px;
}
.page-disclaimer .usage-sample__line{
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.9;
  letter-spacing: .02em;
  color: var(--warm);
  word-break: break-word;
}
.page-disclaimer .usage-sample__line:first-child{
  color: var(--cyan);
}

/* ---------- 双列对照 ---------- */
.page-disclaimer .usage-split{
  display: grid;
  grid-template-columns: minmax(0,1fr);
  gap: 18px;
  margin: 20px 0 6px;
  padding-top: 18px;
  border-top: 1px solid var(--u-rule-faint);
}
.page-disclaimer .usage-split__title{
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mist);
}
.page-disclaimer .usage-split__col .usage-list{
  margin-top: 12px;
}

/* ---------- 结尾联系块 ---------- */
.page-disclaimer .usage-close{
  margin-top: clamp(30px,5vw,52px);
  padding: clamp(20px,3.4vw,30px);
  border: 1px solid var(--u-rule);
  background:
    linear-gradient(135deg, rgba(0,240,192,.09), transparent 58%),
    var(--ink-2);
  position: relative;
}
.page-disclaimer .usage-close::before{
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(180deg, var(--cyan), var(--orange));
}
.page-disclaimer .usage-close__kicker{
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--orange);
}
.page-disclaimer .usage-close__text{
  margin: 10px 0 0;
  font-size: .95rem;
  line-height: 1.72;
  color: var(--body-text);
  max-width: 58ch;
}
.page-disclaimer .usage-close__actions{
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 右侧章节锚点 ---------- */
.page-disclaimer .usage-aside{
  order: 2;
}
.page-disclaimer .usage-toc{
  border-top: 1px solid var(--u-rule);
  padding-top: 14px;
}
.page-disclaimer .usage-toc__title{
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--mist);
}
.page-disclaimer .usage-toc__list{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}
.page-disclaimer .usage-toc__list a{
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 7px 0 7px 8px;
  border-left: 1px solid transparent;
  font-size: .86rem;
  line-height: 1.45;
  color: var(--body-text);
  text-decoration: none;
  transition: color .18s var(--ease), border-color .18s var(--ease), background .18s var(--ease);
}
.page-disclaimer .usage-toc__list a:hover,
.page-disclaimer .usage-toc__list a:focus-visible{
  color: var(--warm);
  border-left-color: var(--orange);
  background: rgba(0,240,192,.06);
}
.page-disclaimer .usage-toc__n{
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--mist);
  letter-spacing: -.02em;
}
.page-disclaimer .usage-toc__foot{
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--u-rule-faint);
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 中屏与桌面 ---------- */
@media (min-width: 680px){
  .page-disclaimer .usage-split{
    grid-template-columns: minmax(0,1fr) minmax(0,1fr);
    gap: 24px;
  }
}

@media (min-width: 1000px){
  .page-disclaimer .usage-hero__inner{
    grid-template-columns: minmax(0,1fr) 268px;
    gap: clamp(32px,4vw,64px);
  }
  .page-disclaimer .usage-hero__meta{
    gap: 14px;
    padding-left: 20px;
    justify-self: end;
    width: 100%;
  }
  .page-disclaimer .usage-layout{
    grid-template-columns: minmax(0,1fr) 232px;
    align-items: start;
  }
  .page-disclaimer .usage-aside{
    order: 0;
  }
  .page-disclaimer .usage-toc{
    position: sticky;
    top: calc(var(--header-stack) + 26px);
  }
  .page-disclaimer .usage-sec__body{
    padding-left: clamp(0px,2vw,8px);
  }
}

@media (min-width: 1360px){
  .page-disclaimer .usage-hero__lead{
    font-size: 1.08rem;
  }
}

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