.page-disclaimer {
  --u-border: rgba(43, 33, 28, .16);
  --u-border-strong: rgba(43, 33, 28, .34);
  --u-side: 296px;
  --u-radius: 14px;
  --u-pad: clamp(18px, 3.4vw, 30px);
  background: var(--cream);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-disclaimer .usage-hero {
  padding: calc(var(--header-h) + 26px) 0 clamp(30px, 5vw, 56px);
  background:
    radial-gradient(circle at 82% 12%, rgba(217, 164, 65, .34), transparent 46%),
    radial-gradient(circle at 8% 88%, rgba(95, 211, 196, .18), transparent 52%),
    linear-gradient(158deg, var(--lake-deep) 0%, #1c3a52 52%, var(--indigo) 100%);
  color: var(--paper);
  position: relative;
  overflow: hidden;
}

.page-disclaimer .usage-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(0deg, rgba(255, 249, 239, .05) 0 1px, transparent 1px 44px),
    repeating-linear-gradient(90deg, rgba(255, 249, 239, .05) 0 1px, transparent 1px 44px);
  pointer-events: none;
}

.page-disclaimer .usage-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  align-items: center;
}

.page-disclaimer .usage-crumb {
  margin-bottom: 16px;
  color: rgba(255, 249, 239, .7);
  font-size: 13px;
  letter-spacing: .02em;
}

.page-disclaimer .usage-crumb a {
  color: var(--gold);
  text-decoration: none;
}

.page-disclaimer .usage-crumb a:hover,
.page-disclaimer .usage-crumb a:focus-visible {
  text-decoration: underline;
}

.page-disclaimer .usage-crumb span[aria-current="page"] {
  color: rgba(255, 249, 239, .88);
}

.page-disclaimer .usage-hero__eyebrow {
  color: var(--gold);
  font-weight: 700;
  letter-spacing: .16em;
}

.page-disclaimer .usage-hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 6.2vw, 50px);
  line-height: 1.22;
  margin: 10px 0 0;
  color: var(--paper);
  text-shadow: 0 2px 0 rgba(21, 72, 92, .45);
}

.page-disclaimer .usage-hero__lede {
  margin: 16px 0 0;
  max-width: 60ch;
  font-size: clamp(15px, 2.2vw, 17px);
  line-height: 1.9;
  color: rgba(255, 249, 239, .84);
}

.page-disclaimer .usage-hero__meta {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-disclaimer .usage-hero__meta li {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 9px 15px;
  border: 1px solid rgba(217, 164, 65, .55);
  border-radius: 999px;
  background: rgba(255, 249, 239, .07);
}

.page-disclaimer .usage-hero__meta span {
  font-size: 11px;
  letter-spacing: .12em;
  color: rgba(255, 249, 239, .62);
}

.page-disclaimer .usage-hero__meta strong {
  font-size: 14px;
  font-weight: 700;
  color: var(--gold);
  white-space: nowrap;
}

.page-disclaimer .usage-hero__art {
  position: relative;
  margin: 0;
  border: 2px solid rgba(255, 249, 239, .34);
  border-radius: var(--u-radius);
  background: var(--paper);
  overflow: visible;
}

.page-disclaimer .usage-hero__art img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 11px;
  object-fit: cover;
}

.page-disclaimer .usage-hero__art figcaption {
  padding: 10px 14px 12px;
  font-size: 12.5px;
  line-height: 1.6;
  color: rgba(43, 33, 28, .72);
  border-top: 1px dashed var(--u-border-strong);
  background: var(--paper);
  border-radius: 0 0 11px 11px;
}

.page-disclaimer .usage-seal {
  position: absolute;
  right: -12px;
  top: -16px;
  width: 74px;
  height: 74px;
  color: var(--ochre);
  background: var(--cream);
  border-radius: 50%;
  padding: 6px;
  box-shadow: var(--shadow-paper);
}

/* ---------- 摘要框 ---------- */
.page-disclaimer .usage-brief-wrap {
  padding-top: clamp(24px, 4vw, 40px);
  padding-bottom: 0;
}

.page-disclaimer .usage-brief {
  position: relative;
  border: 2px solid var(--u-border-strong);
  border-radius: var(--u-radius);
  background: var(--peach);
  box-shadow: var(--shadow-paper);
  padding: 0;
}

.page-disclaimer .usage-brief::before {
  content: "";
  position: absolute;
  inset: 6px -6px -6px 6px;
  border: 2px solid var(--u-border);
  border-radius: var(--u-radius);
  z-index: -1;
}

.page-disclaimer .usage-brief > summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px var(--u-pad);
  cursor: pointer;
  list-style: none;
  border-bottom: 1px dashed var(--u-border-strong);
}

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

.page-disclaimer .usage-brief > summary::after {
  content: "收起";
  margin-left: auto;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--ochre-deep);
}

.page-disclaimer .usage-brief:not([open]) > summary::after {
  content: "展开";
}

.page-disclaimer .usage-brief:not([open]) > summary {
  border-bottom: none;
}

.page-disclaimer .usage-brief__badge {
  flex: none;
  padding: 4px 11px;
  border-radius: 999px;
  background: var(--ochre);
  color: var(--paper);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
}

.page-disclaimer .usage-brief h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(17px, 2.6vw, 21px);
  font-weight: 800;
  line-height: 1.4;
  color: var(--ink);
}

.page-disclaimer .usage-brief__list {
  margin: 0;
  padding: 18px var(--u-pad) 22px calc(var(--u-pad) + 6px);
  display: grid;
  gap: 10px;
  counter-reset: brief;
  list-style: none;
}

.page-disclaimer .usage-brief__list li {
  position: relative;
  padding-left: 30px;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(43, 33, 28, .88);
}

.page-disclaimer .usage-brief__list li::before {
  counter-increment: brief;
  content: counter(brief);
  position: absolute;
  left: 0;
  top: 4px;
  width: 21px;
  height: 21px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--paper);
  border: 1.5px solid var(--ochre);
  color: var(--ochre-deep);
  font-size: 11px;
  font-weight: 700;
}

/* ---------- 侧栏 + 正文 ---------- */
.page-disclaimer .usage-layout {
  display: grid;
  gap: clamp(24px, 4vw, 36px);
  padding-top: clamp(28px, 4.6vw, 48px);
  padding-bottom: clamp(46px, 7vw, 84px);
}

.page-disclaimer .usage-side__panel {
  border: 2px solid var(--u-border-strong);
  border-radius: var(--u-radius);
  background: var(--paper);
  box-shadow: var(--shadow-paper);
  padding: 18px;
  display: grid;
  gap: 16px;
}

.page-disclaimer .usage-side__label {
  margin: 0;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--lake);
}

.page-disclaimer .usage-side__toc {
  display: grid;
  gap: 2px;
}

.page-disclaimer .usage-side__toc a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 10px;
  border-radius: 10px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--ink);
  text-decoration: none;
  transition: background-color .18s ease, color .18s ease;
}

.page-disclaimer .usage-side__toc a span {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 13px;
  color: var(--ochre);
}

.page-disclaimer .usage-side__toc a:hover,
.page-disclaimer .usage-side__toc a:focus-visible {
  background: var(--mist);
  color: var(--lake-deep);
}

.page-disclaimer .usage-side__contact {
  display: grid;
  gap: 7px;
  padding-top: 15px;
  border-top: 1px dashed var(--u-border-strong);
}

.page-disclaimer .usage-side__mail {
  margin: 0;
  font-size: 14px;
  font-weight: 700;
  color: var(--lake-deep);
  word-break: break-all;
}

.page-disclaimer .usage-side__note {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: rgba(43, 33, 28, .68);
}

.page-disclaimer .usage-side__contact .btn {
  justify-self: start;
  margin-top: 4px;
}

/* ---------- 章节 ---------- */
.page-disclaimer .usage-chapters {
  display: grid;
  gap: clamp(18px, 3vw, 26px);
  min-width: 0;
}

.page-disclaimer .usage-chapter {
  --chip: var(--lake);
  position: relative;
  background: var(--paper);
  border: 2px solid var(--u-border);
  border-left: 6px solid var(--chip);
  border-radius: var(--u-radius);
  padding: var(--u-pad);
  box-shadow: var(--shadow-paper);
  scroll-margin-top: calc(var(--header-h) + 20px);
  min-width: 0;
}

.page-disclaimer .usage-chapter:nth-of-type(2) { --chip: var(--ochre); }
.page-disclaimer .usage-chapter:nth-of-type(3) { --chip: var(--table); }
.page-disclaimer .usage-chapter:nth-of-type(4) { --chip: var(--indigo); }
.page-disclaimer .usage-chapter:nth-of-type(5) { --chip: var(--gold); }

.page-disclaimer .usage-chapter__head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 14px;
}

.page-disclaimer .usage-chapter__num {
  flex: none;
  font-family: var(--font-display);
  font-size: clamp(30px, 5vw, 42px);
  font-weight: 900;
  line-height: .92;
  color: var(--chip);
  letter-spacing: -.02em;
}

.page-disclaimer .usage-chapter h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(18px, 3vw, 25px);
  font-weight: 800;
  line-height: 1.42;
  color: var(--ink);
  padding-bottom: 8px;
  border-bottom: 3px solid var(--chip);
  border-image: linear-gradient(90deg, var(--chip) 0 56px, transparent 56px) 1;
}

.page-disclaimer .usage-chapter p {
  margin: 0 0 12px;
  font-size: 15.5px;
  line-height: 1.88;
  color: rgba(43, 33, 28, .87);
  max-width: 70ch;
}

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

.page-disclaimer .usage-chapter a {
  color: var(--lake);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
}

.page-disclaimer .usage-chapter a:hover,
.page-disclaimer .usage-chapter a:focus-visible {
  color: var(--ochre-deep);
}

.page-disclaimer .usage-list {
  margin: 0 0 14px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 9px;
}

.page-disclaimer .usage-list li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.82;
  color: rgba(43, 33, 28, .87);
}

.page-disclaimer .usage-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 11px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--chip);
  transform: rotate(45deg);
}

.page-disclaimer .usage-list strong {
  color: var(--ink);
  font-weight: 700;
}

.page-disclaimer .usage-callout {
  margin: 0 0 14px;
  padding: 13px 16px;
  border-radius: 10px;
  background: var(--mist);
  border-left: 4px solid var(--lake);
  font-size: 14.5px !important;
  line-height: 1.8 !important;
  color: var(--lake-deep) !important;
}

.page-disclaimer .usage-flow {
  display: grid;
  gap: 8px;
  margin: 0 0 14px;
}

.page-disclaimer .usage-flow__step {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 14px;
  border: 1.5px dashed var(--u-border-strong);
  border-radius: 10px;
  background: var(--cream);
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}

.page-disclaimer .usage-flow__step span {
  flex: none;
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--indigo);
  color: var(--neon);
  font-size: 12px;
  font-weight: 700;
}

/* ---------- 响应式 ---------- */
@media (max-width: 599px) {
  .page-disclaimer .usage-hero__meta li {
    flex: 1 1 auto;
  }

  .page-disclaimer .usage-seal {
    width: 60px;
    height: 60px;
    right: -6px;
    top: -12px;
  }

  .page-disclaimer .usage-brief > summary {
    flex-wrap: wrap;
    gap: 8px;
  }

  .page-disclaimer .usage-brief > summary::after {
    margin-left: 0;
  }
}

@media (min-width: 760px) {
  .page-disclaimer .usage-hero__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: center;
  }

  .page-disclaimer .usage-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-disclaimer .usage-flow__step {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    font-size: 13.5px;
    line-height: 1.5;
  }
}

@media (min-width: 960px) {
  .page-disclaimer .usage-layout {
    grid-template-columns: var(--u-side) minmax(0, 1fr);
    align-items: start;
  }

  .page-disclaimer .usage-side {
    position: sticky;
    top: calc(var(--header-h) + 18px);
  }
}

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