.page-disclaimer {
  --usage-gap: clamp(1.75rem, 4vw, 3.5rem);
  --usage-pad: clamp(2.5rem, 6vw, 4.5rem);
}

/* ---------- 首屏 ---------- */

.page-disclaimer .usage-hero {
  padding-top: clamp(1.25rem, 3vw, 2rem);
  padding-bottom: var(--usage-pad);
  background:
    radial-gradient(1100px 460px at 82% -10%, rgba(61, 245, 165, 0.09), transparent 62%),
    radial-gradient(760px 420px at 8% 0%, rgba(56, 217, 232, 0.08), transparent 60%),
    var(--ink-900);
}

.page-disclaimer .usage-hero-grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: end;
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
}

.page-disclaimer .usage-hero-lead .page-title {
  margin: 0.35rem 0 0.9rem;
}

.page-disclaimer .usage-hero-lead .page-lead {
  max-width: 62ch;
  margin: 0;
  color: var(--mist);
}

.page-disclaimer .usage-hero-meta {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-disclaimer .meta-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--line);
}

.page-disclaimer .meta-key {
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--mist);
  flex: none;
}

.page-disclaimer .meta-val {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-variant-numeric: tabular-nums;
  color: var(--silver);
  text-align: right;
}

.page-disclaimer .usage-hero-figure {
  margin-top: clamp(1.75rem, 4vw, 2.75rem);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-800);
}

.page-disclaimer .usage-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 5;
}

/* ---------- 双栏说明主体 ---------- */

.page-disclaimer .usage-body {
  padding-block: var(--usage-pad);
  background: var(--ink-800);
}

.page-disclaimer .usage-layout {
  display: grid;
  gap: var(--usage-gap);
}

.page-disclaimer .usage-index-label {
  margin: 0 0 0.9rem;
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-disclaimer .usage-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.1rem;
  border-left: 1px solid var(--line);
}

.page-disclaimer .usage-link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  padding: 0.62rem 0.9rem;
  margin-left: -1px;
  border-left: 2px solid transparent;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--mist);
  text-decoration: none;
  font-size: 0.94rem;
  line-height: 1.4;
  transition: color 160ms ease-out, border-color 160ms ease-out, background-color 160ms ease-out;
}

.page-disclaimer .usage-link-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-variant-numeric: tabular-nums;
  color: var(--line);
  flex: none;
  transition: color 160ms ease-out;
}

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

.page-disclaimer .usage-link:hover,
.page-disclaimer .usage-link:focus-visible {
  color: var(--silver);
  border-left-color: var(--green);
  background: var(--ink-700);
  outline: none;
}

.page-disclaimer .usage-link:hover .usage-link-num,
.page-disclaimer .usage-link:focus-visible .usage-link-num {
  color: var(--green);
}

.page-disclaimer .usage-link:focus-visible {
  box-shadow: 0 0 0 2px var(--cyan);
}

/* ---------- 条款 ---------- */

.page-disclaimer .usage-content {
  display: grid;
  gap: 0;
  min-width: 0;
}

.page-disclaimer .clause {
  padding-block: clamp(1.75rem, 4vw, 2.6rem);
  border-top: 1px solid var(--line);
  scroll-margin-top: 6.5rem;
}

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

.page-disclaimer .clause:target .clause-num {
  color: var(--green);
}

.page-disclaimer .clause:target .clause-title {
  color: var(--silver);
}

.page-disclaimer .clause-head {
  display: flex;
  align-items: baseline;
  gap: clamp(0.75rem, 2vw, 1.4rem);
  margin-bottom: 1rem;
}

.page-disclaimer .clause-num {
  font-family: var(--font-mono);
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  font-variant-numeric: tabular-nums;
  font-weight: 500;
  color: var(--cyan);
  flex: none;
  position: relative;
  transition: color 160ms ease-out;
}

.page-disclaimer .clause-num::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.35rem;
  width: 100%;
  height: 2px;
  border-radius: var(--pill);
  background: linear-gradient(90deg, var(--green), transparent);
  opacity: 0.5;
}

.page-disclaimer .clause-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 1.85rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.18;
  color: var(--silver);
  text-transform: none;
}

.page-disclaimer .clause-body {
  display: grid;
  gap: 1rem;
  max-width: 72ch;
}

.page-disclaimer .clause-body p {
  margin: 0;
  color: var(--text);
  font-size: 17px;
  line-height: 1.78;
}

.page-disclaimer .usage-tags {
  margin-top: 0.4rem;
}

.page-disclaimer .usage-list {
  margin: 0 0 0.9rem;
  padding-left: 1.15rem;
  display: grid;
  gap: 0.35rem;
  color: var(--text);
  font-size: 0.96rem;
  line-height: 1.7;
}

.page-disclaimer .usage-list li::marker {
  color: var(--green);
  font-family: var(--font-mono);
}

.page-disclaimer .usage-collapse {
  margin-top: 0.5rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: var(--ink-700);
  overflow: hidden;
}

.page-disclaimer .usage-collapse .collapse-trigger {
  width: 100%;
  text-align: left;
  padding: 1rem 1.15rem;
  background: transparent;
  border: 0;
  color: var(--silver);
  font-family: var(--font-body);
  font-size: 0.96rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: color 160ms ease-out, background-color 160ms ease-out;
}

.page-disclaimer .usage-collapse .collapse-trigger:hover {
  color: var(--green);
  background: var(--ink-800);
}

.page-disclaimer .usage-collapse .collapse-trigger:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-disclaimer .usage-collapse .collapse-inner {
  padding: 0 1.15rem 1.1rem;
  display: grid;
  gap: 0.85rem;
  color: var(--mist);
  font-size: 0.94rem;
  line-height: 1.72;
}

.page-disclaimer .usage-collapse .collapse-inner p {
  margin: 0;
  color: var(--mist);
  font-size: 0.94rem;
  line-height: 1.72;
}

.page-disclaimer .usage-collapse .collapse-inner .link {
  color: var(--cyan);
}

.page-disclaimer .usage-cta-row {
  margin-top: 0.6rem !important;
}

/* ---------- 收束色带 ---------- */

.page-disclaimer .usage-ribbon-section {
  padding-block: clamp(2rem, 5vw, 3.25rem);
  background:
    linear-gradient(90deg, rgba(61, 245, 165, 0.12), rgba(56, 217, 232, 0.1) 45%, rgba(124, 92, 255, 0.1)),
    var(--ink-900);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-disclaimer .usage-ribbon {
  display: grid;
  gap: 1.25rem;
  margin: 0;
}

.page-disclaimer .usage-ribbon-item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px dashed var(--line);
}

.page-disclaimer .usage-ribbon-item dt {
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-disclaimer .usage-ribbon-item dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1rem;
  font-variant-numeric: tabular-nums;
  color: var(--green);
  text-align: right;
}

/* ---------- 响应式 ---------- */

@media (min-width: 700px) {
  .page-disclaimer .usage-ribbon {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.5rem 2.5rem;
  }
}

@media (min-width: 900px) {
  .page-disclaimer .usage-hero-grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
  }

  .page-disclaimer .usage-layout {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    align-items: start;
  }

  .page-disclaimer .usage-index {
    position: sticky;
    top: 6.5rem;
  }

  .page-disclaimer .usage-content {
    border-left: 1px solid var(--line);
    padding-left: clamp(1.75rem, 4vw, 3.5rem);
  }

  .page-disclaimer .clause:first-child {
    padding-top: 0.2rem;
  }

  .page-disclaimer .usage-ribbon {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 480px) {
  .page-disclaimer .meta-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.2rem;
  }

  .page-disclaimer .meta-val {
    text-align: left;
  }

  .page-disclaimer .usage-ribbon-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.2rem;
  }

  .page-disclaimer .usage-ribbon-item dd {
    text-align: left;
  }
}
<<<END>>>