.page-disclaimer {
  --pd-rule: 2px solid var(--line);
  --pd-pad: clamp(32px, 5.5vw, 72px);
  --pd-gold: 242, 193, 78;
  --pd-red: 226, 62, 87;
  color: var(--ink-2);
}

.page-disclaimer .crumbs {
  padding: clamp(20px, 3vw, 32px) 0 0;
  font-size: 12px;
  color: var(--ink-3);
}

.page-disclaimer .crumbs a {
  color: var(--ink-3);
  text-decoration: none;
}

.page-disclaimer .crumbs a:hover {
  color: var(--gold);
}

/* ---------- 首屏说明牌 ---------- */

.page-disclaimer .usage-hero {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  padding: clamp(20px, 3vw, 36px) 0 var(--pd-pad);
  border-bottom: var(--pd-rule);
}

.page-disclaimer .usage-hero__lead {
  display: grid;
  gap: 16px;
  align-content: start;
  min-width: 0;
}

.page-disclaimer .usage-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin: 0;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--gold);
}

.page-disclaimer .usage-eyebrow::before {
  content: "";
  width: 34px;
  height: 2px;
  background: var(--gold);
}

.page-disclaimer .usage-hero h1 {
  margin: 0;
  font-size: clamp(40px, 8.5vw, 100px);
  font-weight: 300;
  line-height: 1.02;
  letter-spacing: -.02em;
  color: var(--white);
  overflow-wrap: break-word;
}

.page-disclaimer .usage-hero h1 em {
  font-style: normal;
  font-weight: 500;
  color: var(--gold);
  box-shadow: inset 0 -0.14em 0 rgba(var(--pd-gold), .22);
}

.page-disclaimer .usage-hero__intro {
  margin: 0;
  max-width: 48ch;
  font-size: clamp(15px, 1.7vw, 18px);
  line-height: 1.9;
  color: var(--ink-2);
}

.page-disclaimer .usage-visual {
  margin: 0;
  min-width: 0;
}

.page-disclaimer .usage-visual__frame {
  position: relative;
  overflow: hidden;
  border: var(--pd-rule);
  background: var(--stand);
  box-shadow: var(--shadow-hard);
  aspect-ratio: 3 / 2;
}

.page-disclaimer .usage-visual__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(200deg, rgba(242, 193, 78, .14), transparent 58%);
  pointer-events: none;
}

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

.page-disclaimer .usage-visual__cap {
  margin-top: 12px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--fog);
}

/* ---------- 条目跳转 ---------- */

.page-disclaimer .usage-index {
  display: flex;
  border-bottom: var(--pd-rule);
  border-top: 1px solid var(--line);
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-disclaimer .usage-index::-webkit-scrollbar {
  display: none;
}

.page-disclaimer .usage-index__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  padding: 16px 20px;
  border-right: 1px solid var(--line);
  font-size: 14px;
  color: var(--ink-2);
  text-decoration: none;
  white-space: nowrap;
  transition: background .18s var(--ease), color .18s var(--ease);
}

.page-disclaimer .usage-index__link:first-child {
  padding-left: 0;
}

.page-disclaimer .usage-index__link:hover {
  color: var(--gold-soft);
  background: rgba(var(--pd-gold), .06);
}

.page-disclaimer .usage-index__link[aria-current="true"] {
  background: var(--gold);
  color: var(--night);
}

.page-disclaimer .usage-index__num {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--gold);
}

.page-disclaimer .usage-index__link[aria-current="true"] .usage-index__num {
  color: rgba(10, 20, 40, .65);
}

/* ---------- 章节 ---------- */

.page-disclaimer .usage-block {
  display: grid;
  gap: 18px;
  padding: var(--pd-pad) 0;
  border-bottom: 2px solid var(--line);
  scroll-margin-top: 92px;
}

.page-disclaimer .usage-block:last-of-type {
  border-bottom: 0;
}

.page-disclaimer .usage-block__rail {
  display: flex;
  align-items: center;
  gap: 14px;
}

.page-disclaimer .usage-num {
  font-family: var(--font-data);
  font-size: clamp(26px, 4vw, 42px);
  line-height: 1;
  letter-spacing: -.02em;
  color: rgba(var(--pd-gold), .32);
  transition: color .2s var(--ease);
}

.page-disclaimer .usage-block.is-active .usage-num {
  color: var(--gold);
}

.page-disclaimer .usage-rule {
  flex: 1;
  height: 2px;
  background: var(--line);
}

.page-disclaimer .usage-block.is-active .usage-rule {
  background: linear-gradient(90deg, rgba(var(--pd-gold), .7), transparent);
}

.page-disclaimer .usage-block__body {
  min-width: 0;
}

.page-disclaimer .usage-block__title {
  margin: 0 0 12px;
  font-size: clamp(24px, 3.4vw, 36px);
  font-weight: 500;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-disclaimer .usage-block__lede {
  margin: 0 0 22px;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--ink-2);
}

/* ---------- 条目牌 ---------- */

.page-disclaimer .usage-board {
  border-top: 1px solid var(--line);
}

.page-disclaimer .sign {
  position: relative;
  padding: 18px 0 18px 18px;
  border-bottom: 1px solid var(--line);
  transition: background .18s var(--ease), padding-left .18s var(--ease);
}

.page-disclaimer .sign::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 3px;
  background: var(--gold);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform .18s var(--ease);
}

.page-disclaimer .sign:hover,
.page-disclaimer .sign:focus-within {
  background: rgba(var(--pd-gold), .05);
  padding-left: 26px;
}

.page-disclaimer .sign:hover::before,
.page-disclaimer .sign:focus-within::before {
  transform: scaleY(1);
}

.page-disclaimer .sign__key {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--gold-soft);
}

.page-disclaimer .sign__text {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--ink-2);
}

/* ---------- 联系方式 ---------- */

.page-disclaimer .usage-channels {
  margin: 0;
  display: grid;
  border-top: 1px solid var(--line);
}

.page-disclaimer .usage-channels__row {
  display: grid;
  gap: 6px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
  position: relative;
  transition: background .18s var(--ease), padding-left .18s var(--ease);
}

.page-disclaimer .usage-channels__row::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 3px;
  background: var(--gold);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform .18s var(--ease);
}

.page-disclaimer .usage-channels__row:hover {
  background: rgba(var(--pd-gold), .05);
  padding-left: 24px;
}

.page-disclaimer .usage-channels__row:hover::before {
  transform: scaleY(1);
}

.page-disclaimer .usage-channels dt {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--fog);
}

.page-disclaimer .usage-channels dd {
  margin: 0;
  font-size: 16px;
  line-height: 1.6;
  color: var(--white);
  overflow-wrap: anywhere;
}

.page-disclaimer .usage-note {
  margin: 22px 0 0;
  padding: 16px 20px;
  border-left: 3px solid var(--red);
  background: rgba(var(--pd-red), .08);
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-2);
}

.page-disclaimer .usage-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-disclaimer .usage-actions .btn {
  text-decoration: none;
}

/* ---------- 页尾条 ---------- */

.page-disclaimer .usage-footnav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  padding: 28px 0 clamp(40px, 6vw, 78px);
  border-top: 2px solid var(--line);
}

.page-disclaimer .usage-footnav__note {
  margin: 0;
  max-width: 56ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-3);
}

.page-disclaimer .usage-top {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--gold);
  text-decoration: none;
  padding-bottom: 3px;
  border-bottom: 1px solid rgba(var(--pd-gold), .4);
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-disclaimer .usage-top:hover {
  color: var(--gold-soft);
  border-color: var(--gold-soft);
}

/* ---------- 桌面版 ---------- */

@media (min-width: 900px) {
  .page-disclaimer .usage-hero {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    align-items: end;
    column-gap: clamp(32px, 5vw, 72px);
  }

  .page-disclaimer .usage-index {
    flex-wrap: wrap;
    overflow-x: visible;
  }

  .page-disclaimer .usage-index__link {
    flex: 1 1 0;
    justify-content: center;
  }

  .page-disclaimer .usage-index__link:first-child {
    padding-left: 20px;
  }

  .page-disclaimer .usage-block {
    grid-template-columns: 150px minmax(0, 1fr);
    column-gap: clamp(24px, 4vw, 64px);
    row-gap: 0;
  }

  .page-disclaimer .usage-block__rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    padding-top: 6px;
  }

  .page-disclaimer .usage-rule {
    width: 2px;
    height: 100%;
    min-height: 48px;
    flex: 1;
    background: var(--line);
  }

  .page-disclaimer .usage-block.is-active .usage-rule {
    background: linear-gradient(180deg, rgba(var(--pd-gold), .7), transparent);
  }

  .page-disclaimer .sign {
    display: grid;
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 6px 28px;
    align-items: baseline;
  }

  .page-disclaimer .sign__key {
    margin-bottom: 0;
  }

  .page-disclaimer .usage-channels__row {
    grid-template-columns: 170px minmax(0, 1fr);
    gap: 6px 28px;
    align-items: baseline;
  }
}

@media (min-width: 1200px) {
  .page-disclaimer .usage-block {
    grid-template-columns: 176px minmax(0, 1fr);
  }

  .page-disclaimer .sign {
    grid-template-columns: 220px minmax(0, 1fr);
  }
}

@media (max-width: 420px) {
  .page-disclaimer .usage-hero h1 {
    font-size: clamp(30px, 11.5vw, 44px);
  }

  .page-disclaimer .usage-index__link {
    padding: 14px 16px;
  }

  .page-disclaimer .usage-footnav {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .sign,
  .page-disclaimer .sign::before,
  .page-disclaimer .usage-channels__row,
  .page-disclaimer .usage-channels__row::before,
  .page-disclaimer .usage-index__link,
  .page-disclaimer .usage-num {
    transition: none;
  }
}
<<<END>>>