.page-disclaimer {
  --usage-key-w: 168px;
  --usage-hair: rgba(230, 241, 236, 0.12);
  --usage-hair-strong: rgba(53, 242, 208, 0.24);
  background: var(--sig-ink);
  color: var(--sig-body);
  padding-bottom: clamp(48px, 8vw, 104px);
}

.page-disclaimer .sig-container {
  padding-top: clamp(12px, 2.4vw, 24px);
}

.page-disclaimer .sig-breadcrumb {
  font-size: 13px;
}

.page-disclaimer a:focus-visible,
.page-disclaimer summary:focus-visible {
  outline: 2px solid var(--sig-cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 首屏 ---------- */
.page-disclaimer .usage-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 4vw, 40px);
  align-items: end;
  padding: clamp(22px, 4vw, 44px) 0 clamp(26px, 4vw, 48px);
  border-bottom: 1px solid var(--usage-hair-strong);
}

.page-disclaimer .usage-hero__text {
  min-width: 0;
  max-width: 62ch;
}

.page-disclaimer .usage-hero h1 {
  margin: 12px 0 0;
  font-size: clamp(29px, 5vw, 52px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--sig-body);
}

.page-disclaimer .usage-hero__lead {
  margin: 18px 0 0;
  max-width: 40em;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: rgba(230, 241, 236, 0.78);
}

.page-disclaimer .usage-hero__media {
  position: relative;
  margin: 0;
  border-radius: var(--sig-radius);
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, var(--sig-blue), var(--sig-violet));
}

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

@media (min-width: 880px) {
  .page-disclaimer .usage-hero {
    grid-template-columns: minmax(0, 1fr) minmax(0, 320px);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-disclaimer .usage-hero__media {
    aspect-ratio: 7 / 4;
    align-self: end;
  }
}

/* ---------- 章节骨架 ---------- */
.page-disclaimer .usage-block {
  padding-top: clamp(32px, 5vw, 60px);
}

.page-disclaimer .usage-block + .usage-block {
  margin-top: clamp(30px, 4.6vw, 56px);
  border-top: 1px solid var(--usage-hair);
}

.page-disclaimer .usage-block__head {
  display: grid;
  gap: 10px;
  max-width: 58ch;
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-disclaimer .usage-block__head h2 {
  margin: 0;
  font-size: clamp(21px, 2.4vw, 30px);
  line-height: 1.26;
  letter-spacing: -0.01em;
  font-weight: 700;
  color: var(--sig-body);
}

.page-disclaimer .usage-block__note {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--sig-muted);
}

.page-disclaimer .usage-block__note a {
  color: var(--sig-cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--sig-cyan-soft);
}

.page-disclaimer .usage-block__note a:hover {
  border-bottom-color: var(--sig-cyan);
}

.page-disclaimer .usage-block__foot {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--sig-muted);
}

/* ---------- 两栏对照条目 ---------- */
.page-disclaimer .usage-list {
  display: grid;
}

.page-disclaimer .usage-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 18px 0;
  border-top: 1px solid var(--usage-hair);
}

.page-disclaimer .usage-list > .usage-item:first-child {
  border-top-color: var(--usage-hair-strong);
}

.page-disclaimer .usage-item__key {
  display: flex;
  align-items: baseline;
  gap: 10px;
  min-width: 0;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--sig-body);
}

.page-disclaimer .usage-item__no {
  flex: none;
  font-family: var(--sig-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--sig-cyan);
}

.page-disclaimer .usage-item__val {
  min-width: 0;
  max-width: 48em;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(230, 241, 236, 0.82);
}

.page-disclaimer .usage-item__val p {
  margin: 0;
}

.page-disclaimer .usage-item__val p + p {
  margin-top: 10px;
}

.page-disclaimer .usage-item__val a {
  color: var(--sig-cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--sig-cyan-soft);
}

.page-disclaimer .usage-item__val a:hover {
  border-bottom-color: var(--sig-cyan);
}

@media (min-width: 720px) {
  .page-disclaimer .usage-item {
    grid-template-columns: var(--usage-key-w) minmax(0, 1fr);
    gap: 8px 32px;
    align-items: start;
    padding: 20px 0;
  }
}

/* ---------- 展开补充说明 ---------- */
.page-disclaimer .usage-detail {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px dashed rgba(159, 183, 176, 0.28);
}

.page-disclaimer .usage-detail summary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  list-style: none;
  cursor: pointer;
  padding-bottom: 2px;
  font-family: var(--sig-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--sig-muted);
  border-bottom: 1px solid rgba(159, 183, 176, 0.4);
  transition: color 160ms var(--sig-ease), border-color 160ms var(--sig-ease);
}

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

.page-disclaimer .usage-detail summary::after {
  content: "+";
  font-size: 13px;
  line-height: 1;
}

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

.page-disclaimer .usage-detail summary:hover {
  color: var(--sig-cyan);
  border-bottom-color: var(--sig-cyan);
}

.page-disclaimer .usage-detail[open] summary {
  color: var(--sig-cyan);
  border-bottom-color: var(--sig-cyan);
}

.page-disclaimer .usage-detail__body {
  margin: 12px 0 0;
  max-width: 44em;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(230, 241, 236, 0.7);
}

/* ---------- 数据表 ---------- */
.page-disclaimer .usage-table-wrap {
  border: 1px solid rgba(200, 191, 168, 0.3);
  border-radius: 16px;
  overflow: hidden;
  background: linear-gradient(115deg, rgba(53, 242, 208, 0.06), rgba(17, 20, 23, 0.92) 58%);
}

.page-disclaimer .usage-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  line-height: 1.75;
}

.page-disclaimer .usage-table th[scope="row"] {
  text-align: left;
  vertical-align: top;
  width: 22%;
  min-width: 104px;
  padding: 15px 18px;
  border-bottom: 1px solid rgba(200, 191, 168, 0.2);
  color: var(--sig-body);
  font-weight: 600;
  font-family: var(--sig-sans);
  letter-spacing: 0;
}

.page-disclaimer .usage-table td {
  vertical-align: top;
  padding: 15px 18px;
  border-bottom: 1px solid rgba(200, 191, 168, 0.2);
  color: rgba(230, 241, 236, 0.8);
}

.page-disclaimer .usage-table tr:last-child th,
.page-disclaimer .usage-table tr:last-child td {
  border-bottom: 0;
}

@media (max-width: 640px) {
  .page-disclaimer .usage-table,
  .page-disclaimer .usage-table tbody,
  .page-disclaimer .usage-table tr,
  .page-disclaimer .usage-table th[scope="row"],
  .page-disclaimer .usage-table td {
    display: block;
    width: auto;
    min-width: 0;
  }

  .page-disclaimer .usage-table tr {
    padding: 14px 18px;
    border-bottom: 1px solid rgba(200, 191, 168, 0.2);
  }

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

  .page-disclaimer .usage-table th[scope="row"],
  .page-disclaimer .usage-table td {
    padding: 0;
    border-bottom: 0;
  }

  .page-disclaimer .usage-table td {
    margin-top: 6px;
    color: rgba(230, 241, 236, 0.74);
  }
}

/* ---------- 结尾提示条 ---------- */
.page-disclaimer .usage-final {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px 28px;
  margin-top: clamp(38px, 6vw, 72px);
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--sig-orange);
  border-radius: var(--sig-radius);
  background: linear-gradient(120deg, rgba(255, 122, 41, 0.14), rgba(17, 20, 23, 0.72) 64%);
}

.page-disclaimer .usage-final__text {
  flex: 1 1 320px;
  margin: 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--sig-body);
}

.page-disclaimer .usage-final__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (max-width: 720px) {
  .page-disclaimer {
    --usage-key-w: 100%;
  }

  .page-disclaimer .usage-final__actions {
    width: 100%;
  }

  .page-disclaimer .usage-final__actions .sig-btn {
    flex: 1 1 auto;
    justify-content: center;
  }
}

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