.page-disclaimer {
  --usage-note-bg: rgba(18, 58, 82, .66);
  --usage-code-bg: rgba(5, 19, 31, .88);
  position: relative;
  overflow-x: hidden;
  padding: calc(var(--header-h) + 1.25rem) 0 clamp(3rem, 7vw, 5.5rem);
  background:
    radial-gradient(1100px 480px at 84% -8%, rgba(47, 227, 210, .11), transparent 62%),
    radial-gradient(880px 460px at 4% 14%, rgba(255, 107, 74, .07), transparent 60%),
    var(--abyss);
  color: var(--sand);
}

/* ---------- 面包屑 ---------- */
.page-disclaimer .usage-crumb {
  margin: 0 0 clamp(1rem, 3vw, 1.6rem);
  font-size: .8125rem;
  color: var(--muted);
}
.page-disclaimer .usage-crumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .45rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-disclaimer .usage-crumb__list li + li::before {
  content: "/";
  margin-right: .45rem;
  color: var(--cyan-32);
}
.page-disclaimer .usage-crumb__list a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s ease, border-color .2s ease;
}
.page-disclaimer .usage-crumb__list a:hover,
.page-disclaimer .usage-crumb__list a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan-32);
}
.page-disclaimer .usage-crumb__list [aria-current="page"] {
  color: var(--sand);
}

/* ---------- 首屏 ---------- */
.page-disclaimer .usage-hero {
  max-width: 100%;
}
.page-disclaimer .usage-hero__eyebrow {
  display: block;
  margin: 0 0 .85rem;
}
.page-disclaimer .usage-hero__title {
  margin: 0 0 1rem;
  max-width: 20ch;
  font-size: clamp(1.9rem, 6vw, 3.4rem);
  line-height: 1.15;
  letter-spacing: -.02em;
}
.page-disclaimer .usage-hero__lede {
  margin: 0;
  max-width: 40em;
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--ink-70);
}
.page-disclaimer .usage-hero__meta {
  margin: .85rem 0 0;
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .28rem .7rem;
  border-radius: var(--r-pill);
  border: 1px solid var(--gold-10);
  background: var(--gold-10);
  color: var(--gold);
  font-size: .75rem;
  letter-spacing: .04em;
}
.page-disclaimer .usage-hero__media {
  margin: clamp(1.4rem, 4vw, 2.25rem) 0 0;
  border: var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}
.page-disclaimer .usage-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 编号跳转条 ---------- */
.page-disclaimer .usage-jump {
  margin-top: clamp(1.4rem, 4vw, 2.25rem);
  padding: .75rem 0;
  display: flex;
  align-items: center;
  gap: .75rem;
  border-top: var(--line);
  border-bottom: var(--line);
}
.page-disclaimer .usage-jump__label {
  flex: none;
  font-family: var(--font-serif);
  font-size: .72rem;
  letter-spacing: .18em;
  color: var(--muted);
  text-transform: uppercase;
}
.page-disclaimer .usage-jump__list {
  display: flex;
  flex: 1 1 auto;
  gap: .5rem;
  margin: 0;
  padding: .15rem 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}
.page-disclaimer .usage-jump__list::-webkit-scrollbar {
  height: 0;
}
.page-disclaimer .usage-jump__link {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .45rem .85rem;
  border: var(--line);
  border-radius: var(--r-pill);
  color: var(--sand);
  font-size: .8125rem;
  white-space: nowrap;
  text-decoration: none;
  transition: border-color .2s ease, background-color .2s ease, color .2s ease;
}
.page-disclaimer .usage-jump__link .bx-num {
  font-size: .75rem;
  color: var(--cyan);
}
.page-disclaimer .usage-jump__link:hover,
.page-disclaimer .usage-jump__link:focus-visible {
  border-color: var(--cyan-32);
  background: var(--cyan-06);
  color: var(--mint);
}

/* ---------- 条款 ---------- */
.page-disclaimer .usage-clause {
  padding-block: clamp(2rem, 5vw, 3.25rem);
  border-bottom: var(--line);
  scroll-margin-top: calc(var(--header-h) + 1rem);
}
.page-disclaimer .usage-clause:last-child {
  border-bottom: 0;
}
.page-disclaimer .usage-clause__head {
  display: flex;
  align-items: flex-start;
  gap: clamp(.8rem, 2.5vw, 1.5rem);
  margin-bottom: clamp(1.1rem, 3vw, 1.75rem);
}
.page-disclaimer .usage-clause__no {
  flex: none;
  padding-top: .12em;
  font-family: var(--font-mono);
  font-size: clamp(1.55rem, 4.6vw, 2.4rem);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--cyan);
}
.page-disclaimer .usage-clause__title {
  margin: 0;
  font-size: clamp(1.3rem, 3.6vw, 1.95rem);
  line-height: 1.3;
  letter-spacing: -.01em;
  font-weight: 700;
  color: var(--sand);
}
.page-disclaimer .usage-clause__grid {
  display: grid;
  gap: clamp(1.1rem, 3vw, 1.75rem);
}

/* ---------- 条款正文 ---------- */
.page-disclaimer .usage-body p {
  margin: 0 0 1rem;
  max-width: 40em;
  font-size: 1rem;
  line-height: 1.78;
  color: var(--ink-70);
}
.page-disclaimer .usage-body p:last-child {
  margin-bottom: 0;
}
.page-disclaimer .usage-body .usage-lead {
  font-size: 1.0625rem;
  line-height: 1.72;
  color: var(--sand);
}
.page-disclaimer .usage-body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-32);
  padding-bottom: 1px;
  transition: color .2s ease, border-color .2s ease;
}
.page-disclaimer .usage-body a:hover,
.page-disclaimer .usage-body a:focus-visible {
  color: var(--mint);
  border-bottom-color: var(--cyan);
}
.page-disclaimer .usage-list {
  display: grid;
  gap: .7rem;
  margin: 0 0 1.1rem;
  padding: 0;
  list-style: none;
}
.page-disclaimer .usage-list li {
  position: relative;
  padding-left: 1.35rem;
  font-size: .9688rem;
  line-height: 1.72;
  color: var(--ink-70);
}
.page-disclaimer .usage-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: .5rem;
  height: .5rem;
  border: 1px solid var(--cyan-32);
  border-radius: 2px;
  background: var(--cyan-10);
}
.page-disclaimer .usage-list li strong {
  color: var(--sand);
  font-weight: 700;
}

/* ---------- 版本时间轴 ---------- */
.page-disclaimer .usage-timeline {
  display: grid;
  gap: .75rem;
  margin: 0 0 1.1rem;
  padding: 0 0 0 1rem;
  list-style: none;
  border-left: 1px solid var(--cyan-18);
}
.page-disclaimer .usage-timeline li {
  position: relative;
  font-size: .9375rem;
  line-height: 1.7;
  color: var(--ink-70);
}
.page-disclaimer .usage-timeline li::before {
  content: "";
  position: absolute;
  left: -1.32rem;
  top: .58em;
  width: .45rem;
  height: .45rem;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 3px var(--cyan-10);
}
.page-disclaimer .usage-timeline li:last-child::before {
  background: var(--coral);
  box-shadow: 0 0 0 3px var(--coral-10);
}
.page-disclaimer .usage-timeline .bx-num {
  margin-right: .5rem;
  font-size: .8125rem;
  color: var(--mint);
}

/* ---------- 引用格式 ---------- */
.page-disclaimer .usage-cite {
  margin: 0 0 1.1rem;
  padding: .95rem 1rem 1rem;
  border: var(--line);
  border-radius: var(--r-md);
  background: var(--usage-code-bg);
}
.page-disclaimer .usage-cite__label {
  margin: 0 0 .6rem;
  font-family: var(--font-serif);
  font-size: .72rem;
  letter-spacing: .16em;
  color: var(--mint);
}
.page-disclaimer .usage-cite__code {
  margin: 0 0 .85rem;
  padding: 0;
  font-family: var(--font-mono);
  font-size: .8125rem;
  line-height: 1.9;
  color: var(--cyan);
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: anywhere;
}
.page-disclaimer .usage-cite__code code {
  font: inherit;
  color: inherit;
}
.page-disclaimer .usage-cite__copy {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .45rem .9rem;
  font: inherit;
  font-size: .8125rem;
  color: var(--sand);
  border: 1px solid var(--coral-30);
  border-radius: var(--r-pill);
  background: var(--coral-10);
  cursor: pointer;
  transition: background-color .2s ease, border-color .2s ease;
}
.page-disclaimer .usage-cite__copy:hover {
  background: rgba(255, 107, 74, .2);
  border-color: var(--coral);
}
.page-disclaimer .usage-cite__copy:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}
.page-disclaimer .usage-cite__copy[data-copied]::after {
  content: "已复制";
  color: var(--cyan);
  font-size: .75rem;
}

/* ---------- 联系块 ---------- */
.page-disclaimer .usage-contact {
  display: grid;
  gap: .5rem;
  margin: 0 0 1.1rem;
  padding: 0;
  list-style: none;
  font-size: .9375rem;
  line-height: 1.7;
  color: var(--ink-70);
}
.page-disclaimer .usage-contact li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .15rem .7rem;
}
.page-disclaimer .usage-contact__label {
  flex: none;
  min-width: 5.2em;
  font-size: .8125rem;
  letter-spacing: .04em;
  color: var(--muted);
}
.page-disclaimer .usage-contact .bx-num {
  color: var(--sand);
  word-break: break-all;
}

/* ---------- 右侧注释栏 ---------- */
.page-disclaimer .usage-note {
  padding: .95rem 1rem;
  border: var(--line);
  border-left: 2px solid var(--cyan-32);
  border-radius: var(--r-md);
  background: var(--usage-note-bg);
  font-size: .8125rem;
  line-height: 1.68;
  color: var(--muted);
}
.page-disclaimer .usage-note__summary {
  display: none;
}
.page-disclaimer .usage-note__title {
  margin: 0 0 .55rem;
  font-family: var(--font-serif);
  font-size: .72rem;
  letter-spacing: .16em;
  color: var(--mint);
}
.page-disclaimer .usage-note p {
  margin: 0 0 .55rem;
}
.page-disclaimer .usage-note p:last-child {
  margin-bottom: 0;
}

/* ---------- 窄屏：注释栏折叠 ---------- */
@media (max-width: 899px) {
  .page-disclaimer .usage-note {
    padding: .8rem .9rem;
  }
  .page-disclaimer .usage-note__summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .6rem;
    list-style: none;
    cursor: pointer;
    font-family: var(--font-serif);
    font-size: .72rem;
    letter-spacing: .16em;
    color: var(--mint);
  }
  .page-disclaimer .usage-note__summary::-webkit-details-marker {
    display: none;
  }
  .page-disclaimer .usage-note__summary::after {
    content: "展开";
    font-family: var(--font-display);
    font-size: .72rem;
    letter-spacing: 0;
    color: var(--cyan);
  }
  .page-disclaimer .usage-note[open] .usage-note__summary::after {
    content: "收起";
  }
  .page-disclaimer .usage-note__title {
    display: none;
  }
  .page-disclaimer .usage-note__summary + .usage-note__body {
    margin-top: .6rem;
    padding-top: .6rem;
    border-top: 1px solid var(--cyan-18);
  }
  .page-disclaimer .usage-jump__label {
    display: none;
  }
}

/* ---------- 桌面双栏 ---------- */
@media (min-width: 900px) {
  .page-disclaimer .usage-clause__grid {
    grid-template-columns: minmax(0, 1fr) 288px;
    gap: clamp(1.75rem, 4vw, 3rem);
    align-items: start;
  }
  .page-disclaimer .usage-note {
    position: relative;
  }
}

@media (min-width: 1180px) {
  .page-disclaimer .usage-hero__lede {
    font-size: 1.125rem;
  }
  .page-disclaimer .usage-body p {
    font-size: 1.0313rem;
  }
}
<<<END>>>