.page-disclaimer {
  --dlv-1: #CFE7EE;
  --dlv-2: #DBEEF3;
  --dlv-3: #E8F3F7;
  --dlv-4: #F1F7FA;
  --dlv-5: #F7F3EA;
  --dlv-title: 15rem;
  background: var(--dawn);
  color: var(--ink);
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-disclaimer a {
  color: var(--lake);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.page-disclaimer .breadcrumb {
  padding-top: clamp(16px, 2.6vw, 30px);
}

/* ── 顶部版本说明区 ── */
.page-disclaimer .usage-head {
  padding: clamp(14px, 2.4vw, 26px) 0 clamp(20px, 3.4vw, 40px);
}

.page-disclaimer .usage-head__card {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: var(--lake-deep);
  min-height: clamp(330px, 46vw, 460px);
  display: flex;
  align-items: flex-end;
}

.page-disclaimer .usage-head__card > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

.page-disclaimer .usage-head__veil {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(165deg, rgba(10, 67, 86, 0.28) 0%, rgba(10, 67, 86, 0.78) 52%, rgba(10, 67, 86, 0.95) 100%),
    linear-gradient(90deg, rgba(15, 110, 140, 0.35) 0%, rgba(15, 110, 140, 0) 60%);
}

.page-disclaimer .usage-head__content {
  position: relative;
  z-index: 2;
  padding: clamp(24px, 4.2vw, 58px);
  max-width: 46rem;
}

.page-disclaimer .usage-head__eyebrow {
  color: var(--rape);
  margin: 0 0 12px;
}

.page-disclaimer .usage-head__content h1 {
  margin: 0 0 16px;
  font-size: clamp(28px, 5vw, 52px);
  line-height: 1.16;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: #fff;
}

.page-disclaimer .usage-head__lede {
  margin: 0 0 22px;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.88);
  max-width: 34em;
}

.page-disclaimer .usage-head__ver {
  display: inline-block;
  margin: 0;
  padding: 7px 18px;
  border: 1px solid var(--sand);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--sand);
  line-height: 1.5;
}

/* ── 章节跳转胶囊 ── */
.page-disclaimer .usage-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: clamp(18px, 2.6vw, 28px);
}

.page-disclaimer .usage-jump a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  background: var(--lake-mist);
  color: var(--lake-deep);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  transition: background-color 0.12s ease, color 0.12s ease, transform 0.12s ease;
}

.page-disclaimer .usage-jump a .num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--lake);
}

.page-disclaimer .usage-jump a:hover {
  background: var(--rape);
  color: var(--ink);
}

.page-disclaimer .usage-jump a:hover .num {
  color: var(--ember-ink);
}

.page-disclaimer .usage-jump a:active {
  transform: translateY(1px);
}

/* ── 章节块 ── */
.page-disclaimer .usage-body {
  display: block;
}

.page-disclaimer .usage-chapter {
  scroll-margin-top: 104px;
  padding: clamp(24px, 3.4vw, 42px) clamp(20px, 3.2vw, 46px);
  border-radius: var(--radius-lg);
}

.page-disclaimer .usage-chapter--1 { background: var(--dlv-1); }
.page-disclaimer .usage-chapter--2 { background: var(--dlv-2); }
.page-disclaimer .usage-chapter--3 { background: var(--dlv-3); }
.page-disclaimer .usage-chapter--4 { background: var(--dlv-4); }
.page-disclaimer .usage-chapter--5 {
  background: var(--dlv-5);
  box-shadow: inset 0 0 0 1px rgba(15, 110, 140, 0.14);
}

.page-disclaimer .usage-chapter__head {
  margin-bottom: 14px;
}

.page-disclaimer .usage-chapter__index {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--lake);
}

.page-disclaimer .usage-chapter__head h2 {
  margin: 0;
  font-size: clamp(19px, 2.3vw, 25px);
  font-weight: 800;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-disclaimer .usage-chapter__body p {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--rock);
  max-width: 36em;
}

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

/* ── 引用写法示例 ── */
.page-disclaimer .usage-sample {
  margin: 18px 0;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.72);
  border-left: 4px solid var(--lake);
}

.page-disclaimer .usage-sample__label {
  margin: 0 0 8px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--lake);
}

.page-disclaimer .usage-sample__code {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.9;
  letter-spacing: 0.02em;
  color: var(--ink);
  word-break: break-word;
}

/* ── 章节之间的刻度线 ── */
.page-disclaimer .usage-rule {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 600 / 14;
  margin: clamp(16px, 2.4vw, 28px) 0;
}

/* ── 收尾 ── */
.page-disclaimer .usage-next {
  margin-top: clamp(24px, 3.6vw, 48px);
  padding: clamp(24px, 3.4vw, 46px);
  border-radius: var(--radius-lg);
  background: var(--lake-deep);
  display: grid;
  gap: 16px;
}

.page-disclaimer .usage-next h2 {
  margin: 0;
  font-size: clamp(20px, 2.2vw, 26px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: #fff;
}

.page-disclaimer .usage-next p {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.85);
  max-width: 38em;
}

.page-disclaimer .usage-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 4px;
}

.page-disclaimer .usage-next__alt {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 26px;
  border: 1.5px solid rgba(255, 255, 255, 0.52);
  border-radius: var(--radius-pill);
  color: #fff;
  font-size: 17px;
  font-weight: 700;
  text-decoration: none;
  transition: background-color 0.12s ease, border-color 0.12s ease;
}

.page-disclaimer .usage-next__alt:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
}

@media (min-width: 880px) {
  .page-disclaimer .usage-chapter {
    display: grid;
    grid-template-columns: var(--dlv-title) minmax(0, 1fr);
    gap: clamp(24px, 4vw, 64px);
    align-items: start;
  }

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

  .page-disclaimer .usage-head__content h1 {
    max-width: 16em;
  }
}

@media (min-width: 1080px) {
  .page-disclaimer .usage-head__card {
    min-height: 480px;
  }
}
<<<END>>>