.page-disclaimer {
  --u-rail: 222px;
  --u-line: rgba(141, 166, 184, 0.38);
}

/* ---------- 首屏 ---------- */
.page-disclaimer .usage-hero {
  position: relative;
  overflow: hidden;
  background: var(--ice-deep);
  border-bottom: 2px solid var(--line-strong);
}

.page-disclaimer .usage-hero__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.page-disclaimer .usage-hero__bg img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.26;
  filter: saturate(0.35) contrast(1.15);
}

.page-disclaimer .usage-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 18, 31, 0.55) 0%, rgba(6, 18, 31, 0.96) 100%);
}

.page-disclaimer .usage-hero__inner {
  position: relative;
  padding-top: clamp(28px, 6vw, 64px);
  padding-bottom: clamp(26px, 5vw, 52px);
}

.page-disclaimer .usage-hero .breadcrumb {
  margin-bottom: 18px;
}

.page-disclaimer .usage-hero h1 {
  margin: 8px 0 20px;
  max-width: 22ch;
  font-family: var(--ff-display);
  font-size: var(--fs-h1);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -0.015em;
  color: var(--ice-white);
}

.page-disclaimer .usage-hero__lead {
  margin: 0;
  max-width: 62ch;
  font-size: var(--fs-body);
  line-height: 1.78;
  color: var(--ice-pale);
}

.page-disclaimer .usage-hero__stamp {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  align-items: center;
  margin: 24px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-family: var(--ff-mono);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  color: var(--steel);
}

.page-disclaimer .usage-hero__stamp strong {
  color: var(--neon);
  font-weight: 600;
}

/* ---------- 布局 ---------- */
.page-disclaimer .usage-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 46px);
  padding-top: clamp(28px, 5vw, 54px);
}

.page-disclaimer .usage-main {
  min-width: 0;
}

/* ---------- 目录 ---------- */
.page-disclaimer .usage-toc {
  order: -1;
  padding: 16px 14px;
  background: rgba(11, 34, 55, 0.92);
  border: 1px solid var(--line-strong);
  border-top: 2px solid var(--neon);
}

.page-disclaimer .usage-toc__title {
  margin: 0;
  font-family: var(--ff-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--steel);
}

.page-disclaimer .usage-toc__list {
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 2px;
}

.page-disclaimer .usage-toc__link {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 9px 8px 9px 10px;
  border-left: 2px solid transparent;
  color: var(--steel);
  font-size: 0.9rem;
  line-height: 1.4;
  text-decoration: none;
  transition: color var(--dur) linear, border-color var(--dur) linear, background-color var(--dur) linear;
}

.page-disclaimer .usage-toc__num {
  font-size: 0.74rem;
  color: var(--ice-light);
  letter-spacing: 0.06em;
  flex: none;
}

.page-disclaimer .usage-toc__link:hover,
.page-disclaimer .usage-toc__link:focus-visible {
  color: var(--ice-white);
  border-left-color: var(--ice-light);
  background: rgba(30, 90, 125, 0.28);
}

.page-disclaimer .usage-toc__link[aria-current="true"] {
  color: var(--neon);
  border-left-color: var(--neon);
  background: rgba(182, 255, 60, 0.08);
}

.page-disclaimer .usage-toc__link[aria-current="true"] .usage-toc__num {
  color: var(--neon);
}

/* ---------- 规则区块 ---------- */
.page-disclaimer .rule-block {
  padding: clamp(22px, 3.4vw, 32px) 0;
  border-top: 1px solid var(--u-line);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-disclaimer .rule-block:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-disclaimer .rule-block__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 14px;
}

.page-disclaimer .rule-block__num {
  flex: none;
  font-size: 0.92rem;
  letter-spacing: 0.08em;
  color: var(--neon);
}

.page-disclaimer .rule-block__num::before {
  content: "";
  display: inline-block;
  width: 18px;
  height: 2px;
  margin-right: 9px;
  vertical-align: middle;
  background: var(--neon);
}

.page-disclaimer .rule-block h2 {
  margin: 0;
  font-family: var(--ff-display);
  font-size: var(--fs-h3);
  font-weight: 800;
  letter-spacing: 0.01em;
  line-height: 1.25;
  color: var(--ice-white);
}

.page-disclaimer .rule-block__rule {
  margin: 0 0 14px;
  max-width: 68ch;
  font-size: var(--fs-body);
  line-height: 1.78;
  color: var(--ice-pale);
}

.page-disclaimer .rule-block__rule a,
.page-disclaimer .rule-block__example a {
  color: var(--ice-light);
  text-decoration-color: var(--ice-bright);
  text-underline-offset: 3px;
}

.page-disclaimer .rule-block__rule a:hover,
.page-disclaimer .rule-block__example a:hover {
  color: var(--neon);
  text-decoration-color: var(--neon);
}

.page-disclaimer .rule-block__example {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 12px;
  margin: 0;
  padding: 11px 14px;
  max-width: 68ch;
  background: rgba(18, 58, 87, 0.55);
  border-left: 2px solid var(--ice-bright);
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--ice-pale);
}

.page-disclaimer .rule-block__tag {
  flex: none;
  font-family: var(--ff-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--neon);
  padding-top: 2px;
}

/* ---------- 时间戳示例块 ---------- */
.page-disclaimer .stamp-sample {
  margin: 0;
  padding: 14px 16px;
  max-width: 68ch;
  overflow-x: auto;
  background: var(--ice-deep);
  border: 1px solid var(--line-strong);
  border-left: 3px solid var(--neon);
  font-family: var(--ff-mono);
  font-size: 0.85rem;
  line-height: 1.9;
  color: var(--ice-light);
  white-space: pre-wrap;
  word-break: break-word;
}

/* ---------- 横向提示带 ---------- */
.page-disclaimer .usage-band {
  margin: clamp(24px, 4vw, 40px) 0;
  padding: clamp(20px, 3.4vw, 30px);
  background: var(--ice-mid);
  border: 1px solid var(--line-strong);
  border-left: 4px solid var(--orange);
}

.page-disclaimer .usage-band__inner {
  display: grid;
  gap: 16px;
}

.page-disclaimer .usage-band__label {
  margin: 0 0 8px;
  font-family: var(--ff-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-disclaimer .usage-band h2 {
  margin: 0;
  font-family: var(--ff-display);
  font-size: clamp(1.15rem, 2.4vw, 1.5rem);
  font-weight: 800;
  line-height: 1.35;
  color: var(--ice-white);
}

.page-disclaimer .usage-band__body p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--ice-pale);
}

.page-disclaimer .usage-band__code {
  margin-top: 12px !important;
  padding: 10px 12px;
  background: rgba(6, 18, 31, 0.72);
  border-left: 2px solid var(--neon);
  font-family: var(--ff-mono);
  font-size: 0.84rem;
  letter-spacing: 0.03em;
  color: var(--neon);
}

/* ---------- 收尾 ---------- */
.page-disclaimer .usage-next {
  margin-top: clamp(30px, 5vw, 52px);
  padding-top: clamp(22px, 3.4vw, 32px);
  border-top: 2px solid var(--line-strong);
}

.page-disclaimer .usage-next h2 {
  margin: 0 0 10px;
  font-family: var(--ff-display);
  font-size: var(--fs-h3);
  font-weight: 800;
  color: var(--ice-white);
}

.page-disclaimer .usage-next__lead {
  margin: 0;
  max-width: 56ch;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--steel);
}

.page-disclaimer .usage-next__links {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .usage-next__links a {
  display: block;
  padding: 12px 14px;
  background: var(--ice-deep);
  border: 2px solid var(--line-strong);
  box-shadow: var(--shadow-hard);
  color: var(--ice-white);
  font-size: 0.92rem;
  text-decoration: none;
  transition: border-color var(--dur) linear, color var(--dur) linear, transform var(--dur) linear, box-shadow var(--dur) linear;
}

.page-disclaimer .usage-next__links a:hover,
.page-disclaimer .usage-next__links a:focus-visible {
  border-color: var(--neon);
  color: var(--neon);
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 rgba(182, 255, 60, 0.16);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-disclaimer .usage-next__links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-disclaimer .usage-band__inner {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 24px;
    align-items: start;
  }
}

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

  .page-disclaimer .usage-toc {
    order: 0;
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-disclaimer .rule-block {
    padding: clamp(26px, 2.6vw, 36px) 0;
  }
}

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

  .page-disclaimer .usage-next__links a:hover,
  .page-disclaimer .usage-next__links a:focus-visible {
    transform: none;
  }
}
<<<END>>>