.page-disclaimer {
  --pd-step-indent: 58px;
  --pd-line-x: 18px;
  background: var(--sand);
  color: var(--ink);
}

.page-disclaimer .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* ---------- 首屏 ---------- */
.page-disclaimer .usage-hero {
  position: relative;
  padding: clamp(26px, 6vw, 64px) 0 clamp(30px, 6vw, 56px);
  background:
    radial-gradient(120% 82% at 90% -14%, var(--pale-gold) 0%, rgba(255, 231, 184, 0) 62%),
    linear-gradient(180deg, var(--paper) 0%, var(--sand) 100%);
  overflow: hidden;
}

.page-disclaimer .usage-hero::after {
  content: "";
  position: absolute;
  right: -90px;
  bottom: -120px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(31, 169, 138, 0.16) 0%, rgba(31, 169, 138, 0) 70%);
  pointer-events: none;
}

.page-disclaimer .usage-hero .breadcrumb {
  margin-bottom: clamp(18px, 4vw, 30px);
}

.page-disclaimer .usage-hero h1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(32px, 6.4vw, 62px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0 0 clamp(14px, 3vw, 22px);
  max-width: 22ch;
}

.page-disclaimer .usage-hero .lead {
  font-size: clamp(16px, 2.4vw, 19px);
  line-height: 1.85;
  color: var(--slate);
  max-width: 40em;
  margin: 0;
}

.page-disclaimer .usage-hero__figure {
  margin: clamp(22px, 4vw, 38px) 0 0;
  position: relative;
  z-index: 1;
}

.page-disclaimer .usage-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 20px;
  object-fit: cover;
  box-shadow: 0 18px 40px -28px rgba(20, 32, 58, 0.45);
}

/* ---------- 首屏章节跳转 ---------- */
.page-disclaimer .usage-jump {
  list-style: none;
  margin: clamp(20px, 4vw, 32px) 0 0;
  padding: 0 0 4px;
  display: flex;
  gap: 10px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-disclaimer .usage-jump__link {
  display: inline-block;
  white-space: nowrap;
  padding: 9px 16px;
  border-radius: 999px;
  background: rgba(255, 253, 249, 0.72);
  border: 1px solid var(--rule);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.01em;
  text-decoration: none;
  transition: background-color 240ms var(--ease), border-color 240ms var(--ease), transform 240ms var(--ease);
}

.page-disclaimer .usage-jump__link:hover,
.page-disclaimer .usage-jump__link:focus-visible {
  background: var(--pale-gold);
  border-color: var(--gold);
  transform: translateY(-2px);
}

/* ---------- 主体布局 ---------- */
.page-disclaimer .usage-layout {
  padding: 0 0 clamp(48px, 9vw, 96px);
  background: linear-gradient(180deg, var(--sand) 0%, var(--sand) 62%, var(--paper) 100%);
}

.page-disclaimer .usage-layout__inner {
  display: grid;
  gap: clamp(20px, 4vw, 44px);
  align-items: start;
}

/* ---------- 目录 ---------- */
.page-disclaimer .usage-toc {
  padding: clamp(14px, 3vw, 20px) 0 clamp(6px, 2vw, 10px);
  border-bottom: 1px solid var(--rule-soft);
}

.page-disclaimer .usage-toc__title {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--slate);
  font-family: var(--font-mono);
}

.page-disclaimer .usage-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
}

.page-disclaimer .usage-toc__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  padding: 7px 12px 7px 10px;
  border-radius: 10px;
  border: 1px solid transparent;
  background: rgba(239, 226, 203, 0.55);
  color: var(--slate);
  font-size: 14px;
  text-decoration: none;
  transition: background-color 240ms var(--ease), color 240ms var(--ease), border-color 240ms var(--ease);
}

.page-disclaimer .usage-toc__link .num {
  font-size: 12px;
  color: var(--sun-deep);
}

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

/* ---------- 章节 ---------- */
.page-disclaimer .usage-flow {
  min-width: 0;
}

.page-disclaimer .usage-sec {
  padding: clamp(24px, 5vw, 44px) 0 clamp(26px, 5vw, 48px);
  border-top: 1px solid var(--rule-soft);
}

.page-disclaimer .usage-sec:first-child {
  border-top: 0;
  padding-top: clamp(6px, 2vw, 12px);
}

.page-disclaimer .usage-sec__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: clamp(10px, 2.4vw, 16px) clamp(12px, 3vw, 20px);
  border-radius: 14px;
  background: linear-gradient(100deg, var(--pale-gold) 0%, rgba(255, 231, 184, 0.35) 46%, rgba(255, 231, 184, 0) 100%);
  margin-bottom: clamp(14px, 3vw, 20px);
}

.page-disclaimer .usage-sec__head .chapter-num {
  flex: none;
  font-size: 13px;
  color: var(--sun-deep);
}

.page-disclaimer .usage-sec__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(20px, 3.6vw, 30px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-disclaimer .usage-sec .prose {
  font-size: clamp(16px, 2.3vw, 17px);
  line-height: 1.85;
  color: var(--slate);
  max-width: 40em;
  margin: 0 0 clamp(16px, 3.4vw, 24px);
}

/* ---------- 步骤 ---------- */
.page-disclaimer .step-list {
  position: relative;
  list-style: none;
  margin: 0 0 clamp(16px, 3.4vw, 24px);
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-disclaimer .step-list::before {
  content: "";
  position: absolute;
  left: var(--pd-line-x);
  top: 12px;
  bottom: 12px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--gold) 0%, var(--sun) 48%, var(--jade) 100%);
  opacity: 0.55;
}

.page-disclaimer .step {
  position: relative;
  padding-left: var(--pd-step-indent);
}

.page-disclaimer .step__num {
  position: absolute;
  left: 0;
  top: 2px;
  z-index: 1;
  width: 38px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: var(--pale-gold);
  color: var(--sun-deep);
  font-size: 13px;
  font-weight: 600;
}

.page-disclaimer .step__box {
  border-radius: 12px;
  background: rgba(255, 253, 249, 0.6);
  border: 1px solid var(--rule-soft);
  transition: background-color 260ms var(--ease), border-color 260ms var(--ease), transform 260ms var(--ease);
}

.page-disclaimer .step__box:hover {
  background: var(--paper);
  border-color: var(--rule);
  transform: translateY(-2px);
}

.page-disclaimer .step__head {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  cursor: pointer;
  list-style: none;
  padding: 11px 14px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(15px, 2.4vw, 17px);
  line-height: 1.6;
  color: var(--ink);
}

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

.page-disclaimer .step__head::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1.4;
  color: var(--sun);
}

.page-disclaimer .step__box[open] .step__head::after {
  content: "−";
}

.page-disclaimer .step__box[open] {
  background: var(--paper);
  border-color: rgba(242, 118, 46, 0.32);
}

.page-disclaimer .step__detail {
  margin: 0 14px 12px;
  padding: 10px 0 2px 12px;
  border-left: 2px solid var(--sand-deep);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--slate);
}

.page-disclaimer .step__detail p {
  margin: 0;
}

/* ---------- 提示卡 ---------- */
.page-disclaimer .usage-note {
  margin: clamp(16px, 3.4vw, 24px) 0 0;
  padding: 14px 16px;
  border: 1px solid var(--jade);
  background: var(--jade-mist);
  border-radius: 14px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ink);
  max-width: 46em;
}

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

.page-disclaimer .usage-inline-link {
  color: var(--sun-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-disclaimer .usage-inline-link:hover,
.page-disclaimer .usage-inline-link:focus-visible {
  color: var(--ink);
  text-decoration-color: var(--sun);
}

/* ---------- 回到顶部 ---------- */
.page-disclaimer .usage-top {
  margin: clamp(20px, 4vw, 28px) 0 0;
}

.page-disclaimer .usage-top__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: 999px;
  border: 1px solid var(--rule);
  background: var(--paper);
  color: var(--ink);
  font-size: 14px;
  text-decoration: none;
  transition: background-color 240ms var(--ease), border-color 240ms var(--ease), transform 240ms var(--ease);
}

.page-disclaimer .usage-top__link::before {
  content: "↑";
  font-family: var(--font-mono);
  color: var(--sun);
}

.page-disclaimer .usage-top__link:hover,
.page-disclaimer .usage-top__link:focus-visible {
  background: var(--pale-gold);
  border-color: var(--gold);
  transform: translateY(-2px);
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-disclaimer .usage-layout__inner {
    grid-template-columns: 218px minmax(0, 1fr);
    gap: clamp(32px, 5vw, 64px);
  }

  .page-disclaimer .usage-toc {
    position: sticky;
    top: calc(var(--header-h) + 20px);
    border-bottom: 0;
    border-left: 1px solid var(--rule-soft);
    padding: 4px 0 4px 18px;
  }

  .page-disclaimer .usage-toc__list {
    display: grid;
    gap: 4px;
    overflow: visible;
  }

  .page-disclaimer .usage-toc__link {
    width: 100%;
    background: transparent;
    padding: 7px 10px;
  }

  .page-disclaimer .usage-jump {
    flex-wrap: wrap;
    overflow: visible;
  }

  .page-disclaimer .step__detail {
    padding-left: 16px;
  }
}

@media (min-width: 1180px) {
  .page-disclaimer .usage-sec .prose {
    max-width: 44em;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .usage-jump__link,
  .page-disclaimer .usage-toc__link,
  .page-disclaimer .step__box,
  .page-disclaimer .usage-top__link {
    transition: none;
  }

  .page-disclaimer .usage-jump__link:hover,
  .page-disclaimer .step__box:hover,
  .page-disclaimer .usage-top__link:hover {
    transform: none;
  }
}
<<<END>>>