.page-disclaimer {
  position: relative;
  display: block;
  padding: clamp(18px, 3.6vw, 30px) 0 clamp(48px, 8vw, 88px);
  color: var(--text);
  background:
    radial-gradient(760px 380px at 88% -6%, rgba(47, 224, 200, .10), transparent 64%),
    radial-gradient(620px 320px at -8% 22%, rgba(110, 108, 147, .16), transparent 62%);
  background-repeat: no-repeat;
}

/* ---------- 面包屑 ---------- */
.page-disclaimer .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 clamp(18px, 3vw, 28px);
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-dim);
}

.page-disclaimer .breadcrumb a {
  color: var(--text-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur), border-color var(--dur);
}

.page-disclaimer .breadcrumb a:hover,
.page-disclaimer .breadcrumb a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-disclaimer .crumb-sep {
  color: var(--violet);
}

.page-disclaimer .crumb-current {
  color: var(--text);
}

/* ---------- 首屏 ---------- */
.usage-hero {
  padding-bottom: clamp(22px, 4vw, 34px);
  border-bottom: 1px solid var(--line);
  margin-bottom: clamp(26px, 4.5vw, 44px);
}

.usage-hero__kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--cyan);
}

.usage-hero h1 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 6vw, 46px);
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--text);
  max-width: 20ch;
}

.usage-hero__lede {
  margin: 0 0 24px;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-dim);
  max-width: 62ch;
}

.usage-hero__quick {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.usage-hero__quick li {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 13px 15px;
  background: var(--blue-panel);
}

.usage-hero__quick-k {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--violet);
}

.usage-hero__quick-v {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--text);
}

@media (min-width: 720px) {
  .usage-hero__quick {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 双栏：索引 + 说明 ---------- */
.usage-split {
  display: grid;
  gap: 18px;
  min-width: 0;
}

@media (min-width: 960px) {
  .usage-split {
    grid-template-columns: 276px minmax(0, 1fr);
    gap: 30px;
    align-items: start;
  }
}

.usage-index {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding: 2px 2px 10px;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}

.usage-index::-webkit-scrollbar {
  height: 4px;
}

.usage-index::-webkit-scrollbar-thumb {
  background: var(--line);
  border-radius: 4px;
}

@media (min-width: 960px) {
  .usage-index {
    flex-direction: column;
    overflow: visible;
    padding: 0;
    gap: 8px;
  }
}

.usage-tab {
  flex: 0 0 auto;
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 168px;
  min-height: 44px;
  padding: 12px 14px;
  text-align: left;
  font: inherit;
  color: var(--text);
  background: var(--glass);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--dur), border-color var(--dur), box-shadow var(--dur);
}

.usage-tab:hover {
  background: var(--glass-2);
  border-color: rgba(47, 224, 200, .38);
}

.usage-tab:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.usage-tab__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--violet);
  transition: color var(--dur);
}

.usage-tab__label {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-dim);
  transition: color var(--dur);
}

.usage-tab[aria-selected="true"] {
  background: var(--glass-2);
  border-color: rgba(47, 224, 200, .55);
  box-shadow: inset 3px 0 0 0 var(--cyan);
}

.usage-tab[aria-selected="true"] .usage-tab__num {
  color: var(--cyan);
}

.usage-tab[aria-selected="true"] .usage-tab__label {
  color: var(--text);
}

@media (min-width: 960px) {
  .usage-tab {
    width: 100%;
    min-width: 0;
  }
}

.usage-panels {
  min-width: 0;
}

.usage-panel {
  padding: clamp(18px, 3.4vw, 30px);
  background: linear-gradient(180deg, rgba(16, 36, 58, .92), rgba(16, 36, 58, .68));
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.usage-panel + .usage-panel {
  margin-top: 18px;
}

.usage-panel__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 14px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.usage-panel__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--cyan);
}

.usage-panel__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(19px, 3.6vw, 25px);
  line-height: 1.35;
  letter-spacing: -.01em;
  color: var(--text);
}

.usage-panel p {
  margin: 0 0 16px;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-dim);
  max-width: 64ch;
}

.usage-panel p:last-child {
  margin-bottom: 0;
}

.usage-panel strong {
  color: var(--text);
  font-weight: 600;
}

.usage-panel a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 224, 200, .35);
  transition: border-color var(--dur), color var(--dur);
}

.usage-panel a:hover,
.usage-panel a:focus-visible {
  border-bottom-color: var(--cyan);
}

/* ---------- 条目列表 ---------- */
.usage-list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.usage-list li {
  position: relative;
  padding: 12px 14px 12px 40px;
  background: rgba(8, 23, 38, .55);
  border: 1px solid var(--line);
  border-left: 3px solid rgba(47, 224, 200, .55);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-dim);
}

.usage-list li::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 20px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  opacity: .7;
}

/* ---------- 状态点图例 ---------- */
.usage-legend {
  display: grid;
  gap: 10px;
  margin: 0 0 20px;
}

.usage-legend__row {
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  gap: 4px 12px;
  align-items: start;
  padding: 13px 14px;
  background: rgba(8, 23, 38, .55);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.usage-dot {
  grid-column: 1;
  grid-row: 1;
  width: 11px;
  height: 11px;
  margin-top: 6px;
  border-radius: 50%;
}

.usage-dot--lime {
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(123, 227, 143, .14);
}

.usage-dot--gold {
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(242, 184, 75, .14);
}

.usage-dot--violet {
  background: var(--violet);
  box-shadow: 0 0 0 4px rgba(110, 108, 147, .18);
}

.usage-legend__name {
  grid-column: 2;
  grid-row: 1;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}

.usage-legend__desc {
  grid-column: 2;
  grid-row: 2;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-dim);
}

@media (prefers-reduced-motion: no-preference) {
  .usage-dot--gold {
    animation: usage-pulse 2.4s ease-in-out infinite;
  }
}

@keyframes usage-pulse {
  0%, 100% {
    box-shadow: 0 0 0 3px rgba(242, 184, 75, .16);
  }
  50% {
    box-shadow: 0 0 0 8px rgba(242, 184, 75, .04);
  }
}

/* ---------- 图例配图 ---------- */
.usage-figure {
  margin: 0 0 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--blue-deep);
}

.usage-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

.usage-figure .media-frame__caption {
  display: block;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--text-dim);
  background: rgba(8, 23, 38, .72);
  border-top: 1px solid var(--line);
}

/* ---------- 排查条目 ---------- */
.usage-trouble {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.usage-trouble__item {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 12px 14px;
  background: rgba(8, 23, 38, .5);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-dim);
}

.usage-trouble__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: rgba(47, 224, 200, .1);
  border: 1px solid rgba(47, 224, 200, .28);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1;
}

/* ---------- 数据格 ---------- */
.usage-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 0 0 18px;
}

@media (min-width: 640px) {
  .usage-meta {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.usage-meta__cell {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px;
  background: rgba(8, 23, 38, .5);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.usage-meta__num {
  font-family: var(--font-mono);
  font-size: clamp(20px, 4vw, 26px);
  font-weight: 500;
  letter-spacing: -.01em;
  color: var(--gold);
}

.usage-meta__cap {
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-dim);
}

/* ---------- 版本提示带 ---------- */
.usage-version-band {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  margin-top: clamp(30px, 5vw, 52px);
  padding: 15px 18px;
  border: 1px solid rgba(242, 184, 75, .42);
  border-left-width: 3px;
  border-radius: var(--radius-sm);
  background: linear-gradient(90deg, rgba(242, 184, 75, .13), rgba(242, 184, 75, .02) 60%, transparent);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-dim);
}

.usage-version-band__dot {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--gold);
}

.usage-version-band__main {
  margin: 0;
  color: var(--text-dim);
}

.usage-version-band__main strong {
  color: var(--gold);
  font-weight: 600;
  letter-spacing: .06em;
}

.usage-version-band__note {
  margin: 0;
  color: var(--text-dim);
  opacity: .85;
}
<<<END>>>