/* ===== 使用说明页 · page-disclaimer ===== */

.page-disclaimer {
  display: block;
  position: relative;
  isolation: isolate;
}

/* 整页精密网格背景 */
.page-disclaimer::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(74, 88, 120, 0.14) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(74, 88, 120, 0.09) 1px, transparent 1px);
  background-size: 96px 96px;
}

.page-disclaimer .wrap {
  position: relative;
  z-index: 1;
}

/* ---------- 面包屑 ---------- */
.page-disclaimer .breadcrumb {
  padding-top: calc(var(--header-h) + clamp(16px, 3vw, 30px));
}

/* ---------- 首屏 ---------- */
.page-disclaimer .usage-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 4.5vw, 52px) 0 clamp(26px, 4vw, 48px);
  border-bottom: 1px solid var(--c-line);
}

.page-disclaimer .usage-hero::after {
  content: "";
  position: absolute;
  top: -46%;
  right: -8%;
  width: min(640px, 76vw);
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle at center, rgba(59, 42, 107, 0.72), rgba(59, 42, 107, 0) 68%);
  pointer-events: none;
  z-index: 0;
}

.page-disclaimer .usage-hero > * {
  position: relative;
  z-index: 1;
}

.page-disclaimer .usage-hero .eyebrow {
  color: var(--c-observ);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  margin: 0;
}

.page-disclaimer .usage-hero__title {
  margin: 10px 0 0;
  font-size: clamp(46px, 8.4vw, 108px);
  line-height: 0.95;
  letter-spacing: -0.02em;
  color: var(--c-stardust);
}

.page-disclaimer .usage-hero__lede {
  max-width: 62ch;
  margin: clamp(18px, 2.6vw, 30px) 0 0;
  color: var(--c-body);
}

.page-disclaimer .usage-hero__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1px;
  margin-top: clamp(24px, 4vw, 42px);
  background: var(--c-line);
  border: 1px solid var(--c-line);
}

.page-disclaimer .usage-hero__stats .stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  background: rgba(16, 26, 61, 0.88);
}

.page-disclaimer .usage-hero__stats .stat__value {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 40px);
  line-height: 1;
  color: var(--c-cyan);
  font-variant-numeric: tabular-nums;
}

.page-disclaimer .usage-hero__stats .stat__value--warm {
  color: var(--c-orange);
}

.page-disclaimer .usage-hero__stats .stat__label {
  font-size: 13px;
  color: var(--c-observ);
  letter-spacing: 0.04em;
}

/* ---------- 章节索引 ---------- */
.page-disclaimer .usage-index {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: clamp(16px, 2.4vw, 24px) 0;
  border-bottom: 1px solid var(--c-line);
}

.page-disclaimer .usage-index .anchor-index__link {
  display: inline-block;
  padding: 7px 13px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  color: var(--c-observ);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.page-disclaimer .usage-index .anchor-index__link:hover,
.page-disclaimer .usage-index .anchor-index__link:focus-visible {
  color: var(--c-cyan);
  border-color: var(--c-cyan);
}

.page-disclaimer .usage-index .anchor-index__link.is-active {
  color: var(--c-void);
  background: var(--c-cyan);
  border-color: var(--c-cyan);
}

/* ---------- 主布局 ---------- */
.page-disclaimer .usage-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3vw, 44px);
  padding: clamp(26px, 4vw, 48px) 0 clamp(40px, 6vw, 80px);
}

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

/* ---------- 章节 ---------- */
.page-disclaimer .usage-sec {
  padding: 0 0 clamp(28px, 4vw, 48px);
  margin-bottom: clamp(28px, 4vw, 48px);
  border-bottom: 1px solid var(--c-line);
}

.page-disclaimer .usage-sec:last-child {
  margin-bottom: 0;
  border-bottom: 0;
  padding-bottom: 0;
}

.page-disclaimer .usage-sec__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: clamp(14px, 2vw, 22px);
}

.page-disclaimer .usage-sec__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--c-orange);
  padding-top: 4px;
}

.page-disclaimer .usage-sec__title {
  margin: 0;
  color: var(--c-stardust);
}

.page-disclaimer .usage-sec .prose p {
  color: var(--c-body);
}

.page-disclaimer .prose a {
  color: var(--c-cyan);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  text-decoration-color: rgba(53, 224, 208, 0.45);
}

.page-disclaimer .prose a:hover,
.page-disclaimer .prose a:focus-visible {
  text-decoration-color: var(--c-cyan);
}

.page-disclaimer .usage-links {
  margin: 1.2em 0 0;
  color: var(--c-body);
}

.page-disclaimer .usage-links a {
  color: var(--c-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(53, 224, 208, 0.45);
}

.page-disclaimer .usage-links a:hover,
.page-disclaimer .usage-links a:focus-visible {
  text-decoration-color: var(--c-cyan);
}

/* ---------- 直角要点列表 ---------- */
.page-disclaimer .square-list {
  list-style: none;
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
  border-left: 1px solid var(--c-line);
}

.page-disclaimer .square-list li {
  position: relative;
  padding-left: 26px;
  color: var(--c-body);
  line-height: 1.75;
}

.page-disclaimer .square-list li::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 0.62em;
  width: 7px;
  height: 7px;
  background: var(--c-cyan);
}

.page-disclaimer .square-list li::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, rgba(53, 224, 208, 0.6), rgba(53, 224, 208, 0));
}

/* ---------- 图示 ---------- */
.page-disclaimer .usage-figure {
  margin: clamp(20px, 3vw, 32px) 0 0;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(16, 26, 61, 0.6);
}

.page-disclaimer .usage-figure__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-disclaimer .usage-figure .media-frame__caption {
  padding: 10px 14px;
  border-top: 1px solid var(--c-line);
  font-size: 13px;
  color: var(--c-observ);
}

/* ---------- 折叠条目 ---------- */
.page-disclaimer .usage-acc {
  margin-top: clamp(18px, 2.4vw, 26px);
  border-top: 1px solid var(--c-line);
}

.page-disclaimer .usage-acc .accordion__item {
  border-bottom: 1px solid var(--c-line);
}

.page-disclaimer .usage-acc .accordion__trigger {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 14px 0;
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
  color: var(--c-stardust);
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.01em;
}

.page-disclaimer .usage-acc .accordion__trigger:hover {
  color: var(--c-cyan);
}

.page-disclaimer .usage-acc .accordion__idx {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--c-orange);
}

.page-disclaimer .usage-acc .accordion__trigger-text {
  flex: 1 1 auto;
}

.page-disclaimer .usage-acc .accordion__mark {
  flex: none;
  position: relative;
  width: 12px;
  height: 12px;
}

.page-disclaimer .usage-acc .accordion__mark::before,
.page-disclaimer .usage-acc .accordion__mark::after {
  content: "";
  position: absolute;
  background: var(--c-cyan);
}

.page-disclaimer .usage-acc .accordion__mark::before {
  left: 0;
  top: 5px;
  width: 12px;
  height: 1px;
}

.page-disclaimer .usage-acc .accordion__mark::after {
  left: 5px;
  top: 0;
  width: 1px;
  height: 12px;
  transition: transform 0.2s ease-out;
}

.page-disclaimer .usage-acc .accordion__item[data-open] .accordion__mark::after {
  transform: scaleY(0);
}

.page-disclaimer .usage-acc .accordion__body {
  padding: 0 0 16px 26px;
  color: var(--c-body);
  font-size: 15px;
  line-height: 1.75;
}

.page-disclaimer .usage-acc .accordion__body p {
  margin: 0;
}

/* ---------- 设备表格 ---------- */
.page-disclaimer .usage-device-wrap {
  margin-top: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--c-line);
  overflow-x: auto;
}

.page-disclaimer .usage-device-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 15px;
}

.page-disclaimer .usage-device-table__caption {
  caption-side: top;
  padding: 12px 14px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-observ);
  border-bottom: 1px solid var(--c-line);
}

.page-disclaimer .usage-device-table th,
.page-disclaimer .usage-device-table td {
  padding: 13px 14px;
  text-align: left;
  vertical-align: top;
  line-height: 1.65;
  border-bottom: 1px solid var(--c-line);
}

.page-disclaimer .usage-device-table thead th {
  background: var(--c-orbit);
  color: var(--c-stardust);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.06em;
}

.page-disclaimer .usage-device-table tbody th {
  position: sticky;
  left: 0;
  background: var(--c-cabin);
  color: var(--c-cyan);
  font-weight: 500;
  white-space: nowrap;
}

.page-disclaimer .usage-device-table tbody td {
  color: var(--c-body);
}

.page-disclaimer .usage-device-table tbody tr:last-child th,
.page-disclaimer .usage-device-table tbody tr:last-child td {
  border-bottom: 0;
}

/* ---------- 右侧指标速览 ---------- */
.page-disclaimer .usage-side {
  min-width: 0;
}

.page-disclaimer .usage-side__inner {
  border: 1px solid var(--c-line);
  background: rgba(16, 26, 61, 0.72);
  padding: clamp(18px, 2.4vw, 24px);
}

.page-disclaimer .usage-side__title {
  margin: 0 0 14px;
  color: var(--c-stardust);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  font-weight: 500;
}

.page-disclaimer .usage-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.page-disclaimer .usage-table__caption {
  caption-side: bottom;
  padding-top: 12px;
  text-align: left;
  font-size: 12px;
  line-height: 1.6;
  color: var(--c-observ);
}

.page-disclaimer .usage-table th,
.page-disclaimer .usage-table td {
  padding: 10px 0;
  text-align: left;
  vertical-align: baseline;
  border-bottom: 1px solid var(--c-line);
}

.page-disclaimer .usage-table th {
  font-weight: 400;
  color: var(--c-observ);
  font-size: 13px;
}

.page-disclaimer .usage-table td {
  text-align: right;
  color: var(--c-stardust);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.page-disclaimer .usage-table tr:last-child th,
.page-disclaimer .usage-table tr:last-child td {
  border-bottom: 0;
}

.page-disclaimer .usage-side__note {
  margin: 16px 0 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-observ);
}

/* ---------- 收尾 ---------- */
.page-disclaimer .usage-cta {
  display: grid;
  gap: clamp(18px, 2.6vw, 28px);
  padding: clamp(24px, 3.6vw, 40px);
  margin-bottom: clamp(40px, 6vw, 88px);
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-orange);
  background:
    radial-gradient(circle at 88% 12%, rgba(59, 42, 107, 0.75), rgba(59, 42, 107, 0) 70%),
    rgba(16, 26, 61, 0.7);
}

.page-disclaimer .usage-cta__title {
  margin: 0 0 10px;
  color: var(--c-stardust);
}

.page-disclaimer .usage-cta__text p {
  margin: 0;
  max-width: 62ch;
  color: var(--c-body);
}

.page-disclaimer .usage-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 1000px) {
  .page-disclaimer .usage-layout {
    grid-template-columns: minmax(0, 7fr) minmax(280px, 4fr);
    align-items: start;
  }

  .page-disclaimer .usage-side__inner {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-disclaimer .usage-sec__head {
    gap: 20px;
  }

  .page-disclaimer .usage-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
  }
}

/* ---------- 窄屏微调 ---------- */
@media (max-width: 640px) {
  .page-disclaimer .usage-index {
    flex-wrap: nowrap;
    overflow-x: auto;
    scrollbar-width: none;
    padding-bottom: 14px;
  }

  .page-disclaimer .usage-index::-webkit-scrollbar {
    display: none;
  }

  .page-disclaimer .usage-index .anchor-index__link {
    flex: none;
  }

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

  .page-disclaimer .usage-sec__head {
    flex-direction: column;
    gap: 6px;
  }

  .page-disclaimer .usage-sec__num {
    padding-top: 0;
  }

  .page-disclaimer .usage-cta__actions .btn {
    flex: 1 1 auto;
  }

  .page-disclaimer .square-list li {
    padding-left: 22px;
  }

  .page-disclaimer .square-list li::before {
    left: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .usage-index .anchor-index__link,
  .page-disclaimer .usage-acc .accordion__mark::after {
    transition: none;
  }
}
<<<END>>>