.page-disclaimer {
  --usage-tag-w: 300px;
  --usage-row-gap: clamp(36px, 5vw, 84px);
  padding-block: clamp(26px, 4vw, 56px) clamp(64px, 9vw, 110px);
  background: var(--ink-900);
  color: var(--text-100);
}

.page-disclaimer .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: clamp(20px, 3vw, 34px);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-400);
}

.page-disclaimer .breadcrumb a {
  color: var(--text-400);
  text-decoration: none;
}

.page-disclaimer .breadcrumb a:hover,
.page-disclaimer .breadcrumb a:focus-visible {
  color: var(--blue-500);
}

.page-disclaimer .breadcrumb__current {
  color: var(--gold-500);
}

.page-disclaimer .breadcrumb__sep {
  color: var(--line-gold-deep);
}

/* ——— 首屏 ——— */
.page-disclaimer .usage-hero {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  align-items: end;
}

.page-disclaimer .eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--gold-500);
  text-transform: uppercase;
}

.page-disclaimer h1 {
  margin-top: 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(38px, 9vw, 76px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--gold-500);
}

.page-disclaimer .usage-hero__text {
  margin-top: clamp(16px, 2.4vw, 26px);
  max-width: 48ch;
  font-size: clamp(15px, 2.1vw, 17px);
  line-height: 1.75;
  color: var(--text-100);
}

.page-disclaimer .usage-figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line-gold-deep);
  border-radius: var(--radius-lg);
  box-shadow: 0 40px 70px -40px rgba(0, 0, 0, 0.9);
}

.page-disclaimer .usage-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
}

.page-disclaimer .usage-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(118deg, rgba(47, 168, 255, 0.16), transparent 46%),
    linear-gradient(300deg, rgba(201, 162, 39, 0.14), transparent 52%);
  pointer-events: none;
}

/* ——— 条款主体 ——— */
.page-disclaimer .usage-clauses {
  margin-top: clamp(44px, 6vw, 78px);
  border-bottom: 1px solid var(--steel-700);
}

.page-disclaimer .usage-clause {
  display: grid;
  gap: 14px;
  padding-block: clamp(28px, 4.4vw, 54px);
  border-top: 1px solid var(--steel-700);
}

.page-disclaimer .usage-clause:first-child {
  border-top-color: var(--line-gold-deep);
}

.page-disclaimer .usage-clause__num {
  display: block;
  font-size: 13px;
  letter-spacing: 0.22em;
  color: var(--gold-500);
}

.page-disclaimer .usage-clause h2 {
  margin-top: 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 3.2vw, 30px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--text-100);
}

.page-disclaimer .usage-clause__body p {
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--text-100);
}

.page-disclaimer .usage-clause__body p + p,
.page-disclaimer .usage-clause__body p + ul,
.page-disclaimer .usage-clause__body ul + p {
  margin-top: 16px;
}

.page-disclaimer .usage-clause__body ul {
  display: grid;
  gap: 10px;
  margin-top: 16px;
  padding: 0;
  list-style: none;
}

.page-disclaimer .usage-clause__body li {
  position: relative;
  padding-left: 24px;
  max-width: 64ch;
  font-size: 15.5px;
  line-height: 1.72;
  color: var(--text-100);
}

.page-disclaimer .usage-clause__body li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 12px;
  height: 2px;
  background: var(--blue-500);
}

.page-disclaimer .usage-clause__body strong {
  color: var(--gold-200);
  font-weight: 700;
}

.page-disclaimer .usage-clause__body a {
  color: var(--blue-500);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-disclaimer .usage-clause__body a:hover,
.page-disclaimer .usage-clause__body a:focus-visible {
  color: var(--blue-200);
}

/* ——— 中部提示带 ——— */
.page-disclaimer .notice-band {
  margin-block: clamp(20px, 3vw, 32px);
  border: 1px solid rgba(255, 122, 51, 0.42);
  border-left: 3px solid var(--orange-500);
  border-radius: var(--radius-md);
  background: linear-gradient(180deg, rgba(255, 122, 51, 0.09), rgba(255, 122, 51, 0.02));
}

.page-disclaimer .notice-band summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 20px;
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  line-height: 1.6;
  font-weight: 600;
  color: var(--gold-200);
}

.page-disclaimer .notice-band summary::-webkit-details-marker {
  display: none;
}

.page-disclaimer .notice-band summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--orange-500);
}

.page-disclaimer .notice-band details[open] summary::after {
  content: "−";
}

.page-disclaimer .notice-band summary:focus-visible {
  outline: 2px solid var(--blue-500);
  outline-offset: -2px;
}

.page-disclaimer .notice-band__badge {
  flex: none;
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background: var(--orange-500);
  color: var(--ink-900);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  text-align: center;
  line-height: 22px;
}

.page-disclaimer .notice-band__body {
  padding: 0 20px 18px 54px;
}

.page-disclaimer .notice-band__body p {
  max-width: 66ch;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--text-100);
}

/* ——— 引用标注示意 ——— */
.page-disclaimer .cite-note {
  display: grid;
  gap: clamp(16px, 2.6vw, 26px);
  margin-top: clamp(22px, 3vw, 32px);
  padding: clamp(18px, 2.6vw, 26px);
  border: 1px solid var(--steel-700);
  border-radius: var(--radius-md);
  background: var(--ink-800);
}

.page-disclaimer .cite-note__diagram {
  display: block;
  width: 100%;
  height: auto;
  max-width: 420px;
}

.page-disclaimer .cite-note__list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .cite-note__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--text-100);
}

.page-disclaimer .cite-note__key {
  flex: none;
  min-width: 46px;
  padding: 2px 8px;
  border: 1px solid var(--line-gold-deep);
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--gold-500);
}

.page-disclaimer .cite-note__key--blue {
  border-color: rgba(47, 168, 255, 0.5);
  color: var(--blue-500);
}

.page-disclaimer .cite-note__key--orange {
  border-color: rgba(255, 122, 51, 0.55);
  color: var(--orange-500);
}

/* ——— 返回顶部 ——— */
.page-disclaimer .to-top {
  position: fixed;
  right: clamp(14px, 3vw, 32px);
  bottom: clamp(14px, 3vw, 32px);
  z-index: 40;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border: 1px solid var(--line-gold-deep);
  border-radius: 999px;
  background: rgba(17, 21, 27, 0.92);
  color: var(--text-100);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s;
}

.page-disclaimer .to-top[data-visible] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.page-disclaimer .to-top:hover,
.page-disclaimer .to-top:focus-visible {
  border-color: var(--blue-500);
  color: var(--blue-200);
}

.page-disclaimer .to-top__arrow {
  color: var(--gold-500);
}

/* ——— 响应式 ——— */
@media (min-width: 640px) {
  .page-disclaimer .cite-note {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
  }

  .page-disclaimer .notice-band__body {
    padding-left: 54px;
  }
}

@media (min-width: 960px) {
  .page-disclaimer .usage-hero {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: clamp(40px, 6vw, 84px);
  }

  .page-disclaimer .usage-clause {
    grid-template-columns: minmax(0, var(--usage-tag-w)) minmax(0, 1fr);
    column-gap: var(--usage-row-gap);
    padding-block: clamp(38px, 4vw, 58px);
  }

  .page-disclaimer .usage-clause__tag {
    position: sticky;
    top: calc(var(--head-h) + 30px);
    align-self: start;
    padding-left: 18px;
    border-left: 2px solid var(--line-gold-deep);
  }

  .page-disclaimer .notice-band summary {
    padding: 18px 24px;
    font-size: 16px;
  }

  .page-disclaimer .notice-band__body {
    padding: 0 24px 20px 60px;
  }
}

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