.page-disclaimer {
  --usage-line: rgba(232, 180, 90, 0.24);
  --usage-line-soft: rgba(232, 180, 90, 0.16);
  --usage-body: rgba(244, 235, 221, 0.8);
  --usage-body-strong: rgba(244, 235, 221, 0.92);
  background: var(--ink);
  color: var(--cream);
  overflow-x: clip;
  padding-bottom: clamp(40px, 7vw, 88px);
}

.page-disclaimer .container {
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.page-disclaimer .usage-row > *,
.page-disclaimer .usage-hero__grid > * {
  min-width: 0;
}

/* ---------- 首屏 ---------- */
.page-disclaimer .usage-hero {
  position: relative;
  isolation: isolate;
  padding: clamp(22px, 4vw, 40px) 0 clamp(30px, 5vw, 58px);
  border-bottom: 1px solid var(--usage-line);
  background:
    radial-gradient(130% 100% at 88% -10%, rgba(232, 180, 90, 0.16), transparent 62%),
    radial-gradient(90% 80% at 0% 110%, rgba(92, 225, 230, 0.08), transparent 60%),
    linear-gradient(180deg, #0B0E11 0%, #0D1318 100%);
}

.page-disclaimer .usage-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    repeating-linear-gradient(to right, rgba(232, 180, 90, 0.07) 0 1px, transparent 1px 80px),
    repeating-linear-gradient(to bottom, rgba(232, 180, 90, 0.07) 0 1px, transparent 1px 80px);
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 78%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 78%);
  pointer-events: none;
}

.page-disclaimer .usage-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3.4vw, 40px);
  align-items: start;
  margin-top: clamp(16px, 2.6vw, 28px);
}

.page-disclaimer .usage-hero h1 {
  margin: 10px 0 0;
  max-width: 24ch;
  font-family: var(--font-display);
  font-size: clamp(30px, 5.6vw, 56px);
  line-height: 1.1;
  letter-spacing: -0.022em;
  color: var(--cream);
}

.page-disclaimer .usage-hero__dek {
  margin: 16px 0 0;
  max-width: 54ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--usage-body);
}

.page-disclaimer .usage-jump {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(146px, 1fr));
  gap: 8px;
}

.page-disclaimer .usage-jump a {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 11px 12px;
  border: 1px solid rgba(232, 180, 90, 0.3);
  background: var(--glass);
  color: var(--usage-body-strong);
  font-size: 13.5px;
  line-height: 1.4;
  text-decoration: none;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-disclaimer .usage-jump a:hover,
.page-disclaimer .usage-jump a:focus-visible {
  border-color: var(--cyan);
  background: rgba(92, 225, 230, 0.08);
  color: var(--cyan);
  outline: none;
}

.page-disclaimer .usage-jump span {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--gold);
}

.page-disclaimer .usage-hero__figure {
  margin: 0;
  aspect-ratio: 12 / 7;
  border: 1px solid rgba(232, 180, 90, 0.3);
  background: #0E1419;
  box-shadow: 0 18px 42px rgba(0, 0, 0, 0.5);
  overflow: hidden;
}

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

/* ---------- 手册行通用 ---------- */
.page-disclaimer .usage-manual {
  padding: clamp(6px, 1.6vw, 16px) 0 0;
}

.page-disclaimer .usage-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(14px, 2.2vw, 26px);
  padding: clamp(30px, 5vw, 54px) 0;
  border-top: 1px solid var(--usage-line-soft);
}

.page-disclaimer .usage-manual:first-of-type .usage-row {
  border-top: 0;
}

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

.page-disclaimer .usage-row__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(36px, 5vw, 58px);
  font-weight: 600;
  line-height: 0.9;
  letter-spacing: -0.05em;
  color: var(--gold);
}

.page-disclaimer .usage-row h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(21px, 3vw, 31px);
  line-height: 1.22;
  letter-spacing: -0.012em;
  color: var(--cream);
}

.page-disclaimer .usage-row__body > p {
  margin: 0 0 14px;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.82;
  color: var(--usage-body);
}

.page-disclaimer .usage-row__note {
  margin-top: 18px;
  padding-left: 14px;
  border-left: 2px solid var(--gold-deep);
  font-size: 14px;
  color: var(--slate);
}

/* ---------- 导航卡片 ---------- */
.page-disclaimer .usage-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
  margin: 6px 0 0;
}

.page-disclaimer .usage-card {
  padding: 15px 16px 17px;
  border: 1px solid var(--usage-line);
  border-left: 2px solid var(--gold);
  background: var(--glass);
}

.page-disclaimer .usage-card h3 {
  margin: 0 0 7px;
  font-family: var(--font-display);
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--gold-soft);
}

.page-disclaimer .usage-card p {
  margin: 0;
  font-size: 13.8px;
  line-height: 1.72;
  color: rgba(244, 235, 221, 0.74);
}

/* ---------- 导航示意图 ---------- */
.page-disclaimer .usage-diagram {
  margin: 20px 0 0;
  padding: 12px;
  border: 1px solid var(--usage-line);
  background: #0E1419;
}

.page-disclaimer .usage-diagram svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-disclaimer .usage-diagram figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  line-height: 1.6;
  color: var(--slate);
}

/* ---------- 奶油纸面：规则阅读 ---------- */
.page-disclaimer .usage-sheet {
  position: relative;
  margin-top: clamp(10px, 2vw, 22px);
  padding: clamp(26px, 4.4vw, 46px) 0 clamp(30px, 5vw, 52px);
  background: var(--cream);
  color: var(--brown);
  border-top: 1px solid var(--gold-deep);
  border-bottom: 1px solid var(--gold-deep);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
}

.page-disclaimer .usage-sheet .usage-row {
  border-top: 0;
  padding: 0;
}

.page-disclaimer .usage-sheet .usage-row__num {
  color: var(--gold-deep);
}

.page-disclaimer .usage-sheet .usage-row h2 {
  color: var(--brown);
}

.page-disclaimer .usage-sheet .usage-row__body > p {
  color: rgba(38, 26, 18, 0.84);
}

.page-disclaimer .rule-index {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0 10px;
  padding: 0;
  list-style: none;
}

.page-disclaimer .rule-index a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 11px;
  border: 1px solid rgba(38, 26, 18, 0.25);
  background: rgba(255, 255, 255, 0.55);
  color: var(--brown);
  font-size: 13.5px;
  line-height: 1.4;
  text-decoration: none;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-disclaimer .rule-index a:hover,
.page-disclaimer .rule-index a:focus-visible {
  background: var(--brown);
  border-color: var(--brown);
  color: var(--cream);
  outline: none;
}

.page-disclaimer .rule-index span {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--gold-deep);
}

.page-disclaimer .rule-index a:hover span,
.page-disclaimer .rule-index a:focus-visible span {
  color: var(--gold-soft);
}

.page-disclaimer .rule-group {
  margin-top: 10px;
  border: 1px solid rgba(38, 26, 18, 0.2);
  background: rgba(255, 255, 255, 0.6);
}

.page-disclaimer .rule-group summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 16px;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 16px;
  line-height: 1.5;
  color: var(--brown);
  transition: background 0.2s var(--ease);
}

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

.page-disclaimer .rule-group summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--gold-deep);
}

.page-disclaimer .rule-group[open] summary::after {
  content: "–";
}

.page-disclaimer .rule-group summary:hover {
  background: rgba(232, 180, 90, 0.18);
}

.page-disclaimer .rule-group summary:focus-visible {
  outline: 2px solid var(--gold-deep);
  outline-offset: -2px;
}

.page-disclaimer .rule-group__code {
  flex: none;
  padding: 2px 7px;
  background: var(--gold-deep);
  color: var(--cream);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
}

.page-disclaimer .rule-group__body {
  padding: 0 16px 16px;
  font-size: 15px;
  line-height: 1.82;
  color: rgba(38, 26, 18, 0.86);
}

.page-disclaimer .rule-group__body p {
  margin: 0 0 10px;
}

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

/* ---------- 两种查法 ---------- */
.page-disclaimer .usage-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
  margin: 8px 0 0;
}

.page-disclaimer .usage-split__item {
  display: flex;
  flex-direction: column;
  gap: 11px;
  padding: clamp(16px, 2.2vw, 24px);
  border: 1px solid var(--usage-line);
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.02));
}

.page-disclaimer .usage-split__item .status {
  align-self: flex-start;
}

.page-disclaimer .usage-split__item h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 18px;
  line-height: 1.35;
  color: var(--gold-soft);
}

.page-disclaimer .usage-split__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--usage-body);
}

.page-disclaimer .usage-split__item .btn {
  align-self: flex-start;
  margin-top: auto;
}

/* ---------- 反馈联系 ---------- */
.page-disclaimer .usage-feedback {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 2.6vw, 30px);
  margin-top: 18px;
  padding: clamp(18px, 3vw, 28px);
  border: 1px solid rgba(255, 122, 89, 0.42);
  background: linear-gradient(140deg, rgba(255, 122, 89, 0.12), rgba(11, 14, 17, 0.5) 62%);
}

.page-disclaimer .usage-feedback__intro h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 17px;
  line-height: 1.4;
  color: var(--coral);
}

.page-disclaimer .usage-feedback__intro p {
  margin: 0 0 14px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--usage-body);
}

.page-disclaimer .usage-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-disclaimer .usage-links a {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px solid var(--usage-line-soft);
  color: var(--usage-body-strong);
  font-size: 14px;
  line-height: 1.6;
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

.page-disclaimer .usage-links a::after {
  content: "→";
  flex: none;
  color: var(--gold);
}

.page-disclaimer .usage-links a:hover,
.page-disclaimer .usage-links a:focus-visible {
  color: var(--cyan);
  outline: none;
}

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

.page-disclaimer .usage-contact {
  display: grid;
  gap: 4px;
  align-content: start;
}

.page-disclaimer .usage-contact__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--usage-line-soft);
}

.page-disclaimer .usage-contact__row:last-child {
  border-bottom: 0;
}

.page-disclaimer .usage-contact__label {
  flex: none;
  min-width: 62px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-disclaimer .usage-contact__value {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--usage-body-strong);
  word-break: break-word;
}

.page-disclaimer .usage-contact__row .copy-btn {
  margin-left: auto;
}

.page-disclaimer .usage-backtop {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: clamp(20px, 3vw, 30px);
  padding-bottom: 3px;
  border-bottom: 1px solid rgba(232, 180, 90, 0.42);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--gold);
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-disclaimer .usage-backtop:hover,
.page-disclaimer .usage-backtop:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
  outline: none;
}

.page-disclaimer .usage-manual--last .usage-row {
  border-top: 1px solid var(--usage-line-soft);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-disclaimer .usage-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 820px) {
  .page-disclaimer .usage-split {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-disclaimer .usage-feedback {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-disclaimer .usage-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: end;
  }

  .page-disclaimer .usage-row {
    grid-template-columns: 132px minmax(0, 1fr);
    column-gap: clamp(24px, 4vw, 54px);
  }

  .page-disclaimer .usage-row__side {
    position: sticky;
    top: 92px;
    align-self: start;
    flex-direction: column;
    gap: 14px;
  }

  .page-disclaimer .usage-sheet .usage-row {
    grid-template-columns: 132px minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .usage-jump a,
  .page-disclaimer .rule-index a,
  .page-disclaimer .rule-group summary,
  .page-disclaimer .usage-links a,
  .page-disclaimer .usage-backtop {
    transition: none;
  }
}
<<<END>>>