.page-disclaimer {
  --u-hair: rgba(217, 178, 106, .26);
  --u-rule: rgba(43, 63, 85, .9);
  background: var(--ink-900);
  color: var(--paper-sand);
}

/* ---------- 首屏 ---------- */
.page-disclaimer .usage-hero {
  padding: clamp(22px, 5vw, 56px) 0 clamp(30px, 6vw, 64px);
  background:
    radial-gradient(120% 90% at 84% -14%, rgba(110, 127, 140, .24), transparent 62%),
    linear-gradient(180deg, rgba(16, 31, 51, .55), rgba(10, 21, 34, 0) 70%);
}

.page-disclaimer .usage-crumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0 0 clamp(18px, 3vw, 30px);
  padding: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--helan-slate);
}

.page-disclaimer .usage-crumb li:not(:last-child)::after {
  content: "/";
  margin-left: 4px;
  color: var(--archive-line);
}

.page-disclaimer .usage-crumb a {
  color: var(--muted-paper);
  text-decoration: none;
  transition: color .2s var(--ease);
}

.page-disclaimer .usage-crumb a:hover,
.page-disclaimer .usage-crumb a:focus-visible {
  color: var(--sand-gold);
}

.page-disclaimer .usage-crumb [aria-current="page"] {
  color: var(--sand-gold);
}

.page-disclaimer .usage-hero__grid {
  display: grid;
  gap: clamp(22px, 4vw, 44px);
}

.page-disclaimer .usage-kicker {
  margin: 0;
  font-size: 11px;
  letter-spacing: .34em;
  color: var(--sand-gold);
  text-transform: uppercase;
}

.page-disclaimer .usage-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 6.2vw, 4rem);
  line-height: 1.05;
  letter-spacing: .01em;
  color: var(--paper-sand);
}

.page-disclaimer .usage-hero__lede {
  margin: 18px 0 0;
  max-width: 50ch;
  font-size: clamp(15px, 1.9vw, 17.5px);
  line-height: 1.85;
  color: var(--muted-paper);
}

.page-disclaimer .usage-meta {
  border-top: 1px solid var(--u-hair);
  padding-top: 18px;
}

.page-disclaimer .usage-meta__label {
  margin: 0;
  font-size: 11px;
  letter-spacing: .3em;
  color: var(--helan-slate);
}

.page-disclaimer .usage-meta ul {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 13px;
}

.page-disclaimer .usage-meta li {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-disclaimer .usage-meta__num {
  flex: none;
  font-size: 15px;
  letter-spacing: .04em;
  color: var(--sand-gold);
}

.page-disclaimer .usage-meta__text {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted-paper);
}

.page-disclaimer .usage-hero__figure {
  margin: clamp(26px, 5vw, 52px) 0 0;
  padding: 10px;
  border: 1px solid var(--u-hair);
  background: var(--ink-800);
  position: relative;
}

.page-disclaimer .usage-hero__figure::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 8px;
  background-image: repeating-linear-gradient(90deg, rgba(217, 178, 106, .5) 0 1px, transparent 1px 15px);
  opacity: .75;
}

.page-disclaimer .usage-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 1400 / 800;
  object-fit: cover;
  filter: saturate(.95) contrast(1.02);
}

.page-disclaimer .usage-hero__figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  line-height: 1.7;
  color: var(--helan-slate);
}

/* ---------- 目录 ---------- */
.page-disclaimer .usage-toc {
  border-top: 1px solid var(--u-rule);
  border-bottom: 1px solid var(--u-rule);
  background: var(--ink-800);
}

.page-disclaimer .usage-toc .shell {
  padding-top: 0;
  padding-bottom: 0;
}

.page-disclaimer .usage-toc__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  list-style: none;
  margin: 0;
  padding: 0;
  background: var(--u-rule);
}

.page-disclaimer .usage-toc__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 15px clamp(12px, 2vw, 20px);
  background: var(--ink-800);
  color: var(--muted-paper);
  text-decoration: none;
  font-size: 14px;
  transition: background .22s var(--ease), color .22s var(--ease);
}

.page-disclaimer .usage-toc__link .mono {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--sand-gold);
}

.page-disclaimer .usage-toc__link:hover,
.page-disclaimer .usage-toc__link:focus-visible {
  background: var(--ink-700);
  color: var(--paper-sand);
}

/* ---------- 条款长卷 ---------- */
.page-disclaimer .usage-body {
  padding: clamp(26px, 5vw, 54px) 0 clamp(20px, 4vw, 34px);
}

.page-disclaimer .clause {
  display: grid;
  gap: 14px;
  padding: clamp(26px, 5vw, 46px) 0;
  border-bottom: 1px solid var(--u-rule);
  scroll-margin-top: 112px;
}

.page-disclaimer .clause__aside {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-disclaimer .clause__num {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3.6vw, 2.2rem);
  line-height: 1;
  letter-spacing: .06em;
  color: var(--sand-gold);
}

.page-disclaimer .clause__tag {
  font-size: 11px;
  letter-spacing: .32em;
  color: var(--helan-slate);
  padding-left: 12px;
  border-left: 1px solid var(--archive-line);
}

.page-disclaimer .clause__main h2 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.3rem, 3.2vw, 1.85rem);
  line-height: 1.36;
  color: var(--paper-sand);
}

.page-disclaimer .clause__main p {
  margin: 0 0 1em;
  max-width: 64ch;
  font-size: clamp(15px, 1.6vw, 16.5px);
  line-height: 1.85;
  color: var(--muted-paper);
}

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

.page-disclaimer .clause__points {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
  max-width: 64ch;
}

.page-disclaimer .clause__points li {
  position: relative;
  padding-left: 22px;
  font-size: 14px;
  line-height: 1.78;
  color: var(--paper-sand);
  opacity: .9;
}

.page-disclaimer .clause__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 11px;
  height: 1px;
  background: var(--sand-gold);
}

.page-disclaimer .usage-link {
  color: var(--sand-gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(217, 178, 106, .4);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-disclaimer .usage-link:hover,
.page-disclaimer .usage-link:focus-visible {
  color: var(--amber-orange);
  border-color: var(--amber-orange);
}

/* ---------- 关键提示色带 ---------- */
.page-disclaimer .usage-ribbon {
  margin: clamp(18px, 3vw, 28px) 0;
  border-left: 3px solid var(--amber-orange);
  background: linear-gradient(90deg, rgba(255, 138, 43, .16), rgba(255, 138, 43, .03) 68%, rgba(255, 138, 43, 0));
}

.page-disclaimer .usage-ribbon--last {
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-disclaimer .usage-ribbon summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  padding: 14px clamp(14px, 2.6vw, 22px);
  cursor: pointer;
  list-style: none;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--paper-sand);
}

.page-disclaimer .usage-ribbon summary .mono {
  font-size: 11px;
  letter-spacing: .26em;
  color: var(--amber-orange);
}

.page-disclaimer .usage-ribbon summary::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--amber-orange);
}

.page-disclaimer .usage-ribbon[open] summary::after {
  content: "－";
}

.page-disclaimer .usage-ribbon__body {
  margin: 0;
  padding: 0 clamp(14px, 2.6vw, 22px) 18px;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--muted-paper);
}

/* ---------- 版本标签 ---------- */
.page-disclaimer .version-tabs {
  display: grid;
  gap: 10px;
  margin-top: 24px;
  max-width: 660px;
}

.page-disclaimer .version-tab {
  border: 1px solid var(--u-hair);
  background: rgba(23, 41, 63, .55);
  transition: border-color .22s var(--ease), background .22s var(--ease);
}

.page-disclaimer .version-tab[open] {
  border-color: rgba(217, 178, 106, .55);
  background: rgba(23, 41, 63, .9);
}

.page-disclaimer .version-tab summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 13px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--paper-sand);
}

.page-disclaimer .version-tab summary::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--sand-gold);
}

.page-disclaimer .version-tab[open] summary::after {
  content: "－";
}

.page-disclaimer .version-tab__no {
  flex: none;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--ink-900);
  background: var(--sand-gold);
  padding: 3px 7px;
  border-radius: 2px;
}

.page-disclaimer .version-tab p {
  margin: 0;
  padding: 0 16px 16px;
  max-width: 60ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted-paper);
}

/* ---------- 收束 ---------- */
.page-disclaimer .usage-outro {
  border-top: 1px solid var(--u-hair);
  padding: clamp(30px, 5vw, 58px) 0 clamp(40px, 6vw, 72px);
  background: linear-gradient(180deg, rgba(16, 31, 51, .55), rgba(10, 21, 34, .95));
}

.page-disclaimer .usage-outro__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-disclaimer .usage-outro h2 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 4vw, 2.4rem);
  line-height: 1.2;
  color: var(--paper-sand);
}

.page-disclaimer .usage-outro__intro p {
  margin: 16px 0 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted-paper);
}

.page-disclaimer .usage-outro__contact {
  border-left: 2px solid var(--sand-gold);
  padding-left: clamp(16px, 2.6vw, 26px);
}

.page-disclaimer .usage-outro__label {
  margin: 0;
  font-size: 11px;
  letter-spacing: .3em;
  color: var(--helan-slate);
}

.page-disclaimer .usage-mail {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 18px;
  margin-top: 14px;
}

.page-disclaimer .usage-mail__addr {
  font-size: clamp(.95rem, 2.4vw, 1.2rem);
  letter-spacing: .04em;
  color: var(--paper-sand);
  overflow-wrap: anywhere;
}

.page-disclaimer .usage-mail .copy-btn {
  flex: none;
}

.page-disclaimer .usage-outro__links {
  margin: 18px 0 0;
  max-width: 44ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted-paper);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-disclaimer .usage-toc__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-disclaimer .usage-hero__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: end;
    gap: clamp(28px, 5vw, 72px);
  }

  .page-disclaimer .usage-meta {
    border-top: 0;
    border-left: 1px solid var(--u-hair);
    padding-top: 0;
    padding-left: clamp(16px, 2.4vw, 26px);
  }

  .page-disclaimer .clause {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: clamp(24px, 4vw, 64px);
    padding: clamp(34px, 5vw, 58px) 0;
  }

  .page-disclaimer .clause__aside {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    position: sticky;
    top: 96px;
  }

  .page-disclaimer .clause__tag {
    padding-left: 0;
    border-left: 0;
  }

  .page-disclaimer .usage-outro__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: start;
    gap: clamp(32px, 5vw, 72px);
  }
}

@media (min-width: 1080px) {
  .page-disclaimer .usage-toc__list {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer *,
  .page-disclaimer *::before,
  .page-disclaimer *::after {
    transition: none !important;
    animation: none !important;
    scroll-behavior: auto !important;
  }
}
<<<END>>>