.page-disclaimer {
  --cut-rule: 22px;
  --cut-seg: 14px;
  display: block;
}

/* ---------- 面包屑间距 ---------- */
.page-disclaimer .breadcrumb {
  margin: 20px 0 8px;
}

/* ---------- 首屏 ---------- */
.page-disclaimer .usage-hero {
  padding: 16px 0 44px;
  background:
    radial-gradient(120% 90% at 88% 12%, rgba(58, 208, 222, .13), transparent 58%),
    radial-gradient(90% 70% at 6% 90%, rgba(215, 168, 78, .10), transparent 60%),
    linear-gradient(160deg, var(--ink) 0%, var(--void) 100%);
}

.page-disclaimer .usage-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
  align-items: start;
}

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

.page-disclaimer .usage-hero .index-tag {
  display: inline-block;
  margin: 0 0 18px;
  padding: 5px 12px;
  border-left: 2px solid var(--gold);
  background: rgba(215, 168, 78, .08);
  color: var(--gold);
  letter-spacing: .22em;
}

.page-disclaimer .usage-hero h1.display {
  margin: 0 0 22px;
  font-family: var(--font-sans);
  font-weight: 200;
  font-size: clamp(36px, 8.4vw, 72px);
  line-height: 1.06;
  letter-spacing: -.01em;
  color: var(--ivory);
  max-width: 15ch;
}

.page-disclaimer .usage-hero h1.display strong {
  font-weight: 900;
  background: linear-gradient(96deg, var(--gold-hi), var(--gold) 55%, #b9862f);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-disclaimer .usage-hero__lede {
  margin: 0 0 24px;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--body-text);
}

.page-disclaimer .usage-hero__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 设备刻度微组件 ---------- */
.page-disclaimer .usage-hero__meter {
  position: relative;
  padding: 20px 18px 22px;
  background: linear-gradient(158deg, rgba(20, 31, 58, .94), rgba(5, 8, 15, .92));
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut-rule)), calc(100% - var(--cut-rule)) 100%, 0 100%);
}

.page-disclaimer .usage-hero__meter::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: linear-gradient(180deg, var(--ruby), var(--cyan) 45%, var(--jade));
}

.page-disclaimer .usage-hero__meter-title {
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--mist);
}

.page-disclaimer .meter {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-disclaimer .meter__seg {
  position: relative;
  padding: 13px 16px 13px 18px;
  background: rgba(11, 18, 36, .78);
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut-seg)), calc(100% - var(--cut-seg)) 100%, 0 100%);
  cursor: default;
  transition: border-color .16s var(--ease), background-color .16s var(--ease), transform .16s var(--ease);
}

.page-disclaimer .meter__seg::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  transition: width .16s var(--ease);
}

.page-disclaimer .meter__seg--low::after { background: var(--ruby); }
.page-disclaimer .meter__seg--ok::after { background: var(--jade); }
.page-disclaimer .meter__seg--wide::after { background: var(--cyan); }

.page-disclaimer .meter__seg:hover,
.page-disclaimer .meter__seg:focus-visible {
  background: rgba(20, 31, 58, .96);
  border-color: var(--line);
  transform: translateX(3px);
  outline: none;
}

.page-disclaimer .meter__seg:focus-visible {
  box-shadow: 0 0 0 2px rgba(58, 208, 222, .55);
}

.page-disclaimer .meter__seg:hover::after,
.page-disclaimer .meter__seg:focus-visible::after {
  width: 5px;
}

.page-disclaimer .meter__label {
  display: block;
  font-size: 14px;
  letter-spacing: .1em;
  color: var(--gold-hi);
}

.page-disclaimer .meter__seg--ok .meter__label { color: var(--jade); }
.page-disclaimer .meter__seg--wide .meter__label { color: var(--cyan); }

.page-disclaimer .meter__note {
  display: block;
  max-height: 0;
  margin-top: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 13px;
  line-height: 1.72;
  color: var(--mist);
  transition: max-height .24s var(--ease), opacity .24s var(--ease), margin-top .24s var(--ease);
}

.page-disclaimer .meter__seg--ok .meter__note {
  max-height: 130px;
  margin-top: 7px;
  opacity: 1;
}

.page-disclaimer .meter__seg:hover .meter__note,
.page-disclaimer .meter__seg:focus-visible .meter__note {
  max-height: 130px;
  margin-top: 7px;
  opacity: 1;
}

/* ---------- 顶部横幅图 ---------- */
.page-disclaimer .usage-banner {
  margin: 0;
  padding: 0;
  background: linear-gradient(180deg, var(--void), var(--ink));
}

.page-disclaimer .usage-banner__frame {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-disclaimer .usage-banner__frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(1.05) contrast(1.04);
}

.page-disclaimer .usage-banner__frame::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 58%;
  background: linear-gradient(180deg, transparent, rgba(5, 8, 15, .88));
  pointer-events: none;
}

.page-disclaimer .usage-banner__caption {
  position: absolute;
  left: 18px;
  bottom: 16px;
  z-index: 2;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--gold-hi);
  text-shadow: 0 1px 8px rgba(5, 8, 15, .9);
}

/* ---------- 双栏主体 ---------- */
.page-disclaimer .usage-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  padding: 44px 0 72px;
}

/* ---------- 左侧索引 ---------- */
.page-disclaimer .usage-index {
  padding: 16px 14px;
  background: rgba(5, 8, 15, .7);
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}

.page-disclaimer .usage-index .index-tag {
  display: block;
  margin: 0 0 12px;
  padding-left: 10px;
  border-left: 2px solid var(--gold);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--gold);
}

.page-disclaimer .usage-index__list {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-disclaimer .usage-index__list li {
  flex: 0 0 auto;
}

.page-disclaimer .usage-index__list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 14px;
  font-size: 14px;
  color: var(--body-text);
  text-decoration: none;
  border: 1px solid var(--line-soft);
  background: rgba(20, 31, 58, .6);
  white-space: nowrap;
  transition: color .16s var(--ease), border-color .16s var(--ease), background-color .16s var(--ease);
}

.page-disclaimer .usage-index__list a .mono {
  color: var(--gold);
  font-size: 12px;
  letter-spacing: .12em;
}

.page-disclaimer .usage-index__list a:hover,
.page-disclaimer .usage-index__list a:focus-visible {
  color: var(--gold-hi);
  border-color: var(--gold);
  background: rgba(215, 168, 78, .1);
  outline: none;
}

.page-disclaimer .usage-index__top {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 14px;
  min-height: 40px;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.page-disclaimer .usage-index__top:hover,
.page-disclaimer .usage-index__top:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
  outline: none;
}

/* ---------- 右侧正文 ---------- */
.page-disclaimer .usage-content {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 26px;
}

.page-disclaimer .rule {
  position: relative;
  padding: 26px 20px 24px;
  background: linear-gradient(158deg, rgba(20, 31, 58, .82), rgba(11, 18, 36, .66));
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--gold);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut-rule)), calc(100% - var(--cut-rule)) 100%, 0 100%);
  scroll-margin-top: calc(var(--header-h) + 20px);
}

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

.page-disclaimer .rule__num {
  flex: 0 0 auto;
  font-size: clamp(26px, 6vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px var(--gold);
  opacity: .85;
}

.page-disclaimer .rule__title {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(20px, 4.4vw, 30px);
  line-height: 1.28;
  color: var(--ivory);
}

.page-disclaimer .rule__lead {
  margin: 0 0 18px;
  max-width: 42ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--body-text);
}

.page-disclaimer .rule__facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 12px;
  margin: 0 0 20px;
  padding: 16px 14px;
  background: rgba(5, 8, 15, .58);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.page-disclaimer .rule__fact {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-disclaimer .rule__fact .data-number {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(26px, 6vw, 40px);
  line-height: 1;
  color: var(--gold-hi);
}

.page-disclaimer .rule__fact-label {
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: .04em;
  color: var(--mist);
}

/* 折叠细则 */
.page-disclaimer .rule__more {
  border-top: 1px dashed var(--line-soft);
  padding-top: 14px;
}

.page-disclaimer .rule__toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 0 16px;
  font-size: 14px;
  letter-spacing: .08em;
  color: var(--cyan);
  cursor: pointer;
  list-style: none;
  background: rgba(58, 208, 222, .08);
  border: 1px solid rgba(58, 208, 222, .32);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  transition: color .16s var(--ease), background-color .16s var(--ease), border-color .16s var(--ease);
}

.page-disclaimer .rule__toggle::-webkit-details-marker { display: none; }

.page-disclaimer .rule__toggle::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
}

.page-disclaimer .rule__more[open] > .rule__toggle::after {
  content: "–";
}

.page-disclaimer .rule__toggle:hover,
.page-disclaimer .rule__toggle:focus-visible {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
  outline: none;
}

.page-disclaimer .rule__more-body {
  margin-top: 16px;
  padding-left: 2px;
}

.page-disclaimer .rule__more-body ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-disclaimer .rule__more-body li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.82;
  color: var(--body-text);
}

.page-disclaimer .rule__more-body li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 10px;
  height: 1px;
  background: var(--gold);
  transform: rotate(-45deg);
  transform-origin: left center;
}

.page-disclaimer .rule__more-body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(58, 208, 222, .38);
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.page-disclaimer .rule__more-body a:hover,
.page-disclaimer .rule__more-body a:focus-visible {
  color: var(--gold-hi);
  border-color: var(--gold-hi);
  outline: none;
}

/* 光谱带 */
.page-disclaimer .spectrum-bar {
  height: 4px;
  margin: 2px 0;
  background: linear-gradient(90deg, var(--jade), var(--cyan) 48%, var(--ruby));
  opacity: .85;
  clip-path: polygon(0 0, 100% 0, calc(100% - 22px) 100%, 0 100%);
}

/* ---------- 联络块 ---------- */
.page-disclaimer .usage-reach {
  position: relative;
  padding: 28px 20px 26px;
  background:
    radial-gradient(110% 100% at 92% 0%, rgba(215, 168, 78, .16), transparent 62%),
    linear-gradient(158deg, rgba(20, 31, 58, .95), rgba(5, 8, 15, .95));
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut-rule)), calc(100% - var(--cut-rule)) 100%, 0 100%);
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-disclaimer .usage-reach__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 14px;
}

.page-disclaimer .usage-reach__lede {
  margin: 0 0 20px;
  max-width: 48ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--body-text);
}

.page-disclaimer .usage-reach__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 22px;
}

.page-disclaimer .usage-reach__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 16px;
  background: rgba(11, 18, 36, .72);
  border-left: 2px solid var(--gold);
  min-width: 0;
}

.page-disclaimer .usage-reach__label {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--mist);
}

.page-disclaimer .usage-reach__value {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ivory);
  text-decoration: none;
  word-break: break-all;
  border-bottom: 1px solid transparent;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.page-disclaimer .usage-reach__value--plain {
  color: var(--body-text);
}

a.usage-reach__value:hover,
a.usage-reach__value:focus-visible {
  color: var(--gold-hi);
  border-color: var(--gold-hi);
  outline: none;
}

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

/* ---------- 入场动效 ---------- */
.page-disclaimer .reveal-ready [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .32s var(--ease), transform .32s var(--ease);
}

.page-disclaimer .reveal-ready [data-reveal].is-in {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 窄屏优先：表格与事实栏 ---------- */
@media (max-width: 479px) {
  .page-disclaimer .usage-hero {
    padding-top: 8px;
  }

  .page-disclaimer .usage-hero h1.display {
    max-width: none;
  }

  .page-disclaimer .rule__facts {
    grid-template-columns: 1fr 1fr;
  }

  .page-disclaimer .usage-banner__frame {
    aspect-ratio: 3 / 1;
  }

  .page-disclaimer .usage-banner__caption {
    left: 12px;
    bottom: 10px;
    font-size: 11px;
    letter-spacing: .1em;
  }
}

/* ---------- 双栏与桌面布局 ---------- */
@media (min-width: 700px) {
  .page-disclaimer .usage-hero {
    padding: 32px 0 60px;
  }

  .page-disclaimer .usage-hero__grid {
    grid-template-columns: 7fr 5fr;
    gap: 44px;
  }

  .page-disclaimer .usage-banner__frame {
    aspect-ratio: 3 / 1;
  }

  .page-disclaimer .usage-body {
    grid-template-columns: 236px 1fr;
    gap: 44px;
    padding: 60px 0 96px;
  }

  .page-disclaimer .usage-index {
    position: sticky;
    top: calc(var(--header-h) + 20px);
    align-self: start;
  }

  .page-disclaimer .usage-index__list {
    flex-direction: column;
    overflow: visible;
  }

  .page-disclaimer .usage-index__list li {
    flex: 1 1 auto;
  }

  .page-disclaimer .usage-index__list a {
    display: flex;
    width: 100%;
    box-sizing: border-box;
    white-space: normal;
  }

  .page-disclaimer .rule {
    padding: 34px 32px 30px;
  }

  .page-disclaimer .usage-reach {
    padding: 38px 36px 34px;
  }

  .page-disclaimer .usage-reach__grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 1080px) {
  .page-disclaimer .usage-hero__grid {
    grid-template-columns: 6fr 6fr;
    gap: 60px;
  }

  .page-disclaimer .usage-hero__meter {
    padding: 26px 24px 28px;
  }

  .page-disclaimer .usage-body {
    grid-template-columns: 268px 1fr;
    gap: 56px;
  }

  .page-disclaimer .rule {
    padding: 40px 40px 34px;
  }

  .page-disclaimer .rule__lead {
    font-size: 17px;
  }
}

/* ---------- 降低动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .reveal-ready [data-reveal],
  .page-disclaimer .meter__seg,
  .page-disclaimer .meter__note,
  .page-disclaimer .rule__toggle,
  .page-disclaimer .usage-index__list a,
  .page-disclaimer .usage-index__top {
    transition: none !important;
  }

  .page-disclaimer .reveal-ready [data-reveal] {
    opacity: 1;
    transform: none;
  }
}