.page-disclaimer {
  --disc-glow: rgba(232, 84, 47, .09);
  --disc-glow-strong: rgba(232, 84, 47, .16);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.8;
  overflow-x: hidden;
}

.page-disclaimer .usage-crumb {
  padding-top: calc(var(--header-h) + 16px);
}

/* ---------- 首屏 ---------- */
.page-disclaimer .usage-hero {
  position: relative;
  margin-top: 20px;
  padding: 30px 0 44px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, var(--disc-glow), rgba(247, 243, 236, 0) 62%);
  overflow: hidden;
}

.page-disclaimer .usage-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: .3;
  pointer-events: none;
}

.page-disclaimer .usage-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 30px;
}

.page-disclaimer .usage-hero__kicker {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--clay);
}

.page-disclaimer .usage-hero__title {
  margin: 14px 0 0;
  font-family: var(--sans);
  font-weight: 900;
  font-size: clamp(28px, 7vw, 52px);
  line-height: 1.16;
  letter-spacing: -.01em;
  overflow-wrap: break-word;
}

.page-disclaimer .usage-hero__text {
  margin: 18px 0 0;
  max-width: 40em;
  font-size: 16.5px;
  color: var(--slate);
  overflow-wrap: break-word;
}

.page-disclaimer .usage-jump {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-disclaimer .usage-jump__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 14px;
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--slate);
  text-decoration: none;
  font-family: var(--sans);
  font-size: 13.5px;
  line-height: 1.4;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-disclaimer .usage-jump__link:hover {
  border-color: var(--orange);
  color: var(--clay);
}

.page-disclaimer .usage-jump__link:focus-visible {
  outline: none;
  border-color: var(--teal);
  box-shadow: inset 0 0 0 1px var(--teal);
  color: var(--clay);
}

.page-disclaimer .usage-jump__num {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--orange);
}

.page-disclaimer .usage-hero__figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--white);
}

.page-disclaimer .usage-hero__frame {
  position: relative;
  aspect-ratio: 2 / 1;
  overflow: hidden;
  background:
    repeating-linear-gradient(45deg, rgba(217, 210, 198, .55) 0 1px, transparent 1px 10px),
    var(--paper);
}

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

.page-disclaimer .usage-hero__caption {
  padding: 12px 16px 14px;
  border-top: 1px solid var(--line);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--stone);
}

/* ---------- 章节骨架 ---------- */
.page-disclaimer .usage-sec {
  padding: 40px 0 28px;
  border-bottom: 1px solid var(--line);
}

.page-disclaimer .usage-sec:last-of-type {
  border-bottom: none;
}

.page-disclaimer .usage-sec__rail {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 12px;
}

.page-disclaimer .usage-sec__num {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--orange);
  border-bottom: 2px solid var(--orange);
  padding-bottom: 2px;
}

.page-disclaimer .usage-sec__note {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--stone);
}

.page-disclaimer .usage-sec__title {
  margin: 0;
  font-family: var(--sans);
  font-weight: 800;
  font-size: clamp(21px, 4.6vw, 30px);
  line-height: 1.3;
  letter-spacing: -.01em;
}

.page-disclaimer .usage-sec__lead {
  margin: 10px 0 0;
  max-width: 42em;
  font-size: 16px;
  color: var(--slate);
}

/* ---------- 使用范围示意 ---------- */
.page-disclaimer .usage-scale {
  margin: 24px 0 0;
  padding: 16px 14px 12px;
  border: 1px solid var(--line);
  background: var(--white);
}

.page-disclaimer .usage-scale svg {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
}

.page-disclaimer .usage-scale__box--a {
  fill: var(--orange-soft);
  stroke: var(--stone);
  stroke-width: 1;
}

.page-disclaimer .usage-scale__box--b {
  fill: var(--slate);
  stroke: var(--slate);
  stroke-width: 1;
}

.page-disclaimer .usage-scale__box--c {
  fill: var(--clay);
  stroke: var(--clay);
  stroke-width: 1;
}

.page-disclaimer .usage-scale__num {
  font-family: var(--mono);
  font-size: 12px;
  fill: var(--clay);
}

.page-disclaimer .usage-scale__num--light {
  fill: var(--orange-soft);
}

.page-disclaimer .usage-scale__label {
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 800;
  fill: var(--ink);
}

.page-disclaimer .usage-scale__label--light {
  fill: var(--white);
}

.page-disclaimer .usage-scale__desc {
  font-family: var(--serif);
  font-size: 12.5px;
  fill: var(--slate);
}

.page-disclaimer .usage-scale__desc--light {
  fill: rgba(247, 243, 236, .88);
}

.page-disclaimer .usage-scale figcaption {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--stone);
}

/* ---------- 两栏对照 ---------- */
.page-disclaimer .usage-split {
  display: grid;
  gap: 16px;
  margin-top: 24px;
}

.page-disclaimer .usage-split__col {
  padding: 18px 18px 20px;
  border: 1px solid var(--line);
  border-top: 3px solid var(--moss);
  background: var(--white);
}

.page-disclaimer .usage-split__col--edge {
  border-top-color: var(--clay);
  background: var(--paper);
}

.page-disclaimer .usage-split__label {
  margin: 0 0 14px;
  font-family: var(--sans);
  font-weight: 800;
  font-size: 14px;
  letter-spacing: .08em;
  color: var(--moss);
}

.page-disclaimer .usage-split__col--edge .usage-split__label {
  color: var(--clay);
}

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

.page-disclaimer .usage-list__item {
  position: relative;
  padding-left: 20px;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--slate);
  overflow-wrap: break-word;
}

.page-disclaimer .usage-list__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 8px;
  height: 8px;
  background: var(--orange-soft);
  border: 1px solid var(--orange);
}

.page-disclaimer .usage-split__col--edge .usage-list__item::before {
  background: transparent;
  border-color: var(--clay);
}

/* ---------- 步骤与格式示例 ---------- */
.page-disclaimer .usage-steps {
  counter-reset: usage-step;
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-disclaimer .usage-steps__item {
  position: relative;
  padding-left: 46px;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--slate);
}

.page-disclaimer .usage-steps__item::before {
  counter-increment: usage-step;
  content: counter(usage-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: .28em;
  width: 34px;
  padding-top: 3px;
  border-top: 1px solid var(--orange);
  font-family: var(--mono);
  font-size: 12px;
  color: var(--orange);
}

.page-disclaimer .usage-snippet {
  margin: 22px 0 0;
  padding: 14px 16px 16px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--teal);
  background: var(--white);
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.9;
  color: var(--slate);
  word-break: break-word;
}

.page-disclaimer .usage-snippet__label {
  display: block;
  margin-bottom: 6px;
  font-family: var(--sans);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--stone);
}

/* ---------- 底部相关链接 ---------- */
.page-disclaimer .usage-foot-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
  padding: 26px 0 40px;
  border-top: 1px solid var(--line);
  font-family: var(--sans);
  font-size: 14px;
}

/* ---------- 联系区 ---------- */
.page-disclaimer .usage-contact {
  margin-top: 8px;
  background: var(--ink);
  color: var(--paper);
  padding: 44px 0 48px;
}

.page-disclaimer .usage-contact__grid {
  display: grid;
  gap: 28px;
}

.page-disclaimer .usage-contact__kicker {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--orange-soft);
}

.page-disclaimer .usage-contact__title {
  margin: 12px 0 0;
  font-family: var(--sans);
  font-weight: 800;
  font-size: clamp(21px, 4.6vw, 30px);
  line-height: 1.32;
  color: var(--white);
}

.page-disclaimer .usage-contact__text {
  margin: 14px 0 0;
  max-width: 38em;
  font-size: 15.5px;
  color: rgba(247, 243, 236, .82);
}

.page-disclaimer .usage-contact__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid rgba(247, 243, 236, .22);
}

.page-disclaimer .usage-contact__row {
  display: grid;
  grid-template-columns: 6.5em minmax(0, 1fr);
  gap: 10px;
  padding: 13px 0;
  border-bottom: 1px solid rgba(247, 243, 236, .22);
  align-items: baseline;
}

.page-disclaimer .usage-contact__label {
  font-family: var(--mono);
  font-size: 12px;
  color: rgba(247, 243, 236, .62);
}

.page-disclaimer .usage-contact__value {
  font-family: var(--mono);
  font-size: 13.5px;
  color: var(--white);
  word-break: break-word;
}

/* ---------- 桌面端 ---------- */
@media (min-width: 760px) {
  .page-disclaimer .usage-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 0;
  }

  .page-disclaimer .usage-split__col:first-child {
    border-right: none;
  }
}

@media (min-width: 900px) {
  .page-disclaimer .usage-crumb {
    padding-top: calc(var(--header-h) + 24px);
  }

  .page-disclaimer .usage-hero {
    padding: 48px 0 64px;
  }

  .page-disclaimer .usage-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    column-gap: 44px;
    align-items: start;
  }

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

  .page-disclaimer .usage-sec {
    display: grid;
    grid-template-columns: 168px minmax(0, 1fr);
    column-gap: 40px;
    padding: 60px 0 34px;
  }

  .page-disclaimer .usage-sec__rail {
    display: block;
    margin: 0;
    padding-right: 24px;
    border-right: 1px solid var(--line);
    text-align: right;
  }

  .page-disclaimer .usage-sec__num {
    display: inline-block;
    font-size: 15px;
  }

  .page-disclaimer .usage-sec__note {
    display: block;
    width: max-content;
    max-height: 210px;
    margin: 24px 0 0 auto;
    writing-mode: vertical-rl;
    letter-spacing: .18em;
  }

  .page-disclaimer .usage-scale {
    padding: 22px 22px 16px;
  }

  .page-disclaimer .usage-contact {
    padding: 60px 0 64px;
  }

  .page-disclaimer .usage-contact__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    column-gap: 56px;
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .usage-jump__link {
    transition: none;
  }
}