.page-disclaimer {
  --usage-index-w: 236px;
  --usage-measure: 66ch;
  background: var(--ink-900);
  color: var(--text);
}

/* ---------- 首屏 ---------- */
.page-disclaimer .usage-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background: var(--ink-950);
}

.page-disclaimer .usage-hero__media {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.page-disclaimer .usage-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .34;
  filter: saturate(.7) contrast(1.05);
}

.page-disclaimer .usage-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(110% 85% at 84% 14%, rgba(232, 184, 106, .18), transparent 58%),
    linear-gradient(158deg, rgba(7, 12, 22, .95) 0%, rgba(11, 18, 32, .88) 48%, rgba(22, 18, 43, .94) 100%);
}

.page-disclaimer .usage-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, var(--line-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line-soft) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: .16;
}

.page-disclaimer .usage-hero__seal {
  position: absolute;
  top: clamp(.5rem, 4vw, 2.5rem);
  right: clamp(-4rem, -3vw, -1.5rem);
  z-index: 0;
  width: clamp(190px, 34vw, 330px);
  height: auto;
  color: var(--gold);
  opacity: .26;
  pointer-events: none;
}

.page-disclaimer .usage-hero__inner {
  position: relative;
  z-index: 1;
  padding-block: clamp(2.6rem, 7vw, 5.5rem) clamp(2.4rem, 6vw, 4.5rem);
}

.page-disclaimer .usage-hero .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .45rem;
  margin-bottom: clamp(1.6rem, 4vw, 2.6rem);
  font-family: var(--mono);
  font-size: .78rem;
  letter-spacing: .06em;
  color: var(--muted-dim);
}

.page-disclaimer .usage-hero .crumbs a {
  color: var(--muted);
  text-decoration: none;
}

.page-disclaimer .usage-hero .crumbs a:hover,
.page-disclaimer .usage-hero .crumbs a:focus-visible {
  color: var(--cyan);
}

.page-disclaimer .usage-hero .kicker {
  margin: 0 0 1rem;
}

.page-disclaimer .usage-hero .page-title {
  margin: 0 0 1.1rem;
  max-width: 22ch;
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(2rem, 5vw, 3.7rem);
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--text);
}

.page-disclaimer .usage-hero .lede {
  margin: 0;
  max-width: 58ch;
  font-size: clamp(1rem, 1.5vw, 1.12rem);
  line-height: 1.8;
  color: var(--muted);
}

.page-disclaimer .usage-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin: 1.8rem 0 0;
  padding: 0;
  list-style: none;
}

/* ---------- 正文骨架 ---------- */
.page-disclaimer .usage-body {
  display: grid;
  gap: clamp(1.8rem, 4vw, 3.2rem);
  padding-block: clamp(2.2rem, 5.5vw, 4rem) clamp(3rem, 6vw, 5rem);
}

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

/* ---------- 章节索引 ---------- */
.page-disclaimer .usage-index {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--violet-900), rgba(11, 18, 32, .92));
  padding: 1.1rem 1rem 1.2rem;
}

.page-disclaimer .usage-index__title {
  margin: 0 0 .9rem;
  font-family: var(--mono);
  font-size: .74rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted-dim);
}

.page-disclaimer .usage-index__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: .1rem;
}

.page-disclaimer .usage-index__list a {
  display: grid;
  grid-template-columns: 1.9rem minmax(0, 1fr);
  gap: .55rem;
  align-items: baseline;
  padding: .48rem .5rem .48rem .2rem;
  border-left: 2px solid transparent;
  color: var(--muted);
  font-size: .9rem;
  line-height: 1.5;
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-disclaimer .usage-index__list a:hover,
.page-disclaimer .usage-index__list a:focus-visible {
  color: var(--text);
  border-left-color: var(--line);
  background: rgba(53, 224, 208, .05);
}

.page-disclaimer .usage-index__num {
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .06em;
  color: var(--gold);
}

.page-disclaimer .usage-index__list a[aria-current="true"] {
  color: var(--text);
  border-left-color: var(--cyan);
  background: rgba(53, 224, 208, .09);
}

.page-disclaimer .usage-index__list a[aria-current="true"] .usage-index__num {
  color: var(--cyan);
}

.page-disclaimer .usage-index__hint {
  margin: 1rem 0 0;
  padding-top: .9rem;
  border-top: 1px solid var(--line-soft);
  font-size: .8rem;
  line-height: 1.7;
  color: var(--muted-dim);
}

/* ---------- 条款 ---------- */
.page-disclaimer .clause {
  scroll-margin-top: 96px;
  padding-block: clamp(1.7rem, 3.4vw, 2.5rem);
  border-top: 1px solid var(--line-soft);
}

.page-disclaimer .clause:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-disclaimer .clause__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .6rem 1rem;
  margin-bottom: 1rem;
}

.page-disclaimer .clause__num {
  flex: none;
  padding: .16rem .5rem .2rem;
  border: 1px solid rgba(232, 184, 106, .45);
  background: rgba(232, 184, 106, .07);
  font-family: var(--mono);
  font-size: .78rem;
  letter-spacing: .14em;
  color: var(--gold);
}

.page-disclaimer .clause__head h2 {
  flex: 1 1 18ch;
  min-width: 0;
  margin: 0;
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(1.28rem, 2.6vw, 1.72rem);
  line-height: 1.4;
  letter-spacing: -.01em;
  color: var(--text);
}

.page-disclaimer .clause__body p {
  max-width: var(--usage-measure);
  margin: 0 0 1rem;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--muted);
}

.page-disclaimer .clause__body p:last-child {
  margin-bottom: 0;
}

.page-disclaimer .clause__body strong {
  color: var(--text);
  font-weight: 600;
}

.page-disclaimer .clause__body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 224, 208, .35);
}

.page-disclaimer .clause__body a:hover,
.page-disclaimer .clause__body a:focus-visible {
  border-bottom-color: var(--cyan);
}

.page-disclaimer .clause__flag {
  position: relative;
  max-width: var(--usage-measure);
  margin: 1.3rem 0 0;
  padding: .8rem 1rem .8rem 1.1rem;
  border-left: 2px solid var(--gold);
  background: linear-gradient(90deg, rgba(232, 184, 106, .1), rgba(232, 184, 106, 0) 78%);
  font-size: .95rem;
  line-height: 1.8;
  color: var(--text);
}

.page-disclaimer .clause__flag strong {
  color: var(--gold);
  font-weight: 600;
}

/* ---------- 列表与步骤 ---------- */
.page-disclaimer .usage-list {
  max-width: var(--usage-measure);
  margin: 0 0 1rem;
  padding: 0;
  list-style: none;
  display: grid;
  gap: .6rem;
}

.page-disclaimer .usage-list li {
  position: relative;
  padding-left: 1.45rem;
  font-size: .98rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-disclaimer .usage-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .82em;
  width: .7rem;
  height: 1px;
  background: var(--cyan);
}

.page-disclaimer .usage-list strong {
  color: var(--text);
  font-weight: 600;
}

.page-disclaimer .usage-steps {
  max-width: 62ch;
  margin: 1.2rem 0 1.4rem;
  padding: 0;
  list-style: none;
  display: grid;
  gap: .85rem;
}

.page-disclaimer .usage-steps li {
  display: grid;
  grid-template-columns: 2.1rem minmax(0, 1fr);
  gap: .8rem;
  align-items: start;
}

.page-disclaimer .usage-steps__num {
  padding-top: .28rem;
  border-top: 1px solid var(--line);
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-disclaimer .usage-steps p {
  margin: 0;
  font-size: .98rem;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 折叠细则 ---------- */
.page-disclaimer .clause__more {
  max-width: var(--usage-measure);
  margin-top: 1.2rem;
  border: 1px solid var(--line);
  background: rgba(30, 42, 58, .42);
}

.page-disclaimer .clause__more > summary {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .8rem 1rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--mono);
  font-size: .78rem;
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-disclaimer .clause__more > summary::-webkit-details-marker {
  display: none;
}

.page-disclaimer .clause__more > summary::before {
  content: "+";
  flex: none;
  font-size: 1rem;
  line-height: 1;
  color: var(--gold);
}

.page-disclaimer .clause__more[open] > summary::before {
  content: "−";
}

.page-disclaimer .clause__more > summary:hover {
  color: var(--text);
}

.page-disclaimer .clause__more__body {
  padding: .9rem 1rem 1rem;
  border-top: 1px solid var(--line-soft);
}

.page-disclaimer .clause__more__body .usage-list {
  margin-bottom: 0;
}

/* ---------- 联系面板 ---------- */
.page-disclaimer .usage-contact {
  max-width: var(--usage-measure);
  margin: 1.4rem 0 1.2rem;
}

.page-disclaimer .usage-contact .panel__head {
  font-family: var(--mono);
  font-size: .76rem;
  letter-spacing: .08em;
  color: var(--muted-dim);
}

.page-disclaimer .usage-contact__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: .95rem;
  margin: 0;
  padding: 1rem 1.1rem 1.2rem;
}

.page-disclaimer .usage-contact__item dt {
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--muted-dim);
}

.page-disclaimer .usage-contact__item dd {
  margin: .3rem 0 0;
  font-size: .95rem;
  line-height: 1.65;
  color: var(--text);
  overflow-wrap: anywhere;
}

.page-disclaimer .usage-contact__item dd a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 224, 208, .35);
}

.page-disclaimer .usage-contact__item dd a:hover,
.page-disclaimer .usage-contact__item dd a:focus-visible {
  border-bottom-color: var(--cyan);
}

.page-disclaimer .mono {
  font-family: var(--mono);
  font-size: .95em;
  letter-spacing: .02em;
}

/* ---------- 返回顶部兜底 ---------- */
.page-disclaimer .to-top {
  position: fixed;
  right: clamp(1rem, 3vw, 2.2rem);
  bottom: clamp(1rem, 3vw, 2.2rem);
  z-index: 40;
  padding: .6rem .95rem;
  border: 1px solid var(--line);
  background: rgba(11, 18, 32, .92);
  font-family: var(--mono);
  font-size: .74rem;
  letter-spacing: .08em;
  color: var(--muted);
  cursor: pointer;
}

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

/* ---------- 断点 ---------- */
@media (min-width: 900px) {
  .page-disclaimer .usage-body {
    grid-template-columns: var(--usage-index-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-disclaimer .usage-index {
    position: sticky;
    top: 84px;
  }

  .page-disclaimer .usage-hero .page-title {
    max-width: 20ch;
  }
}

@media (min-width: 600px) {
  .page-disclaimer .usage-contact__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 599px) {
  .page-disclaimer .usage-hero__seal {
    opacity: .18;
    width: clamp(150px, 42vw, 210px);
  }

  .page-disclaimer .clause__head {
    gap: .5rem .75rem;
  }

  .page-disclaimer .usage-steps li {
    grid-template-columns: minmax(0, 1fr);
    gap: .2rem;
  }

  .page-disclaimer .usage-steps__num {
    justify-self: start;
    padding-top: .2rem;
  }
}

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