.page-disclaimer {
  background: var(--snow);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-disclaimer .usage-hero {
  display: grid;
  gap: clamp(14px, 2vw, 22px);
  padding: clamp(26px, 5vw, 58px) 0 clamp(22px, 3vw, 38px);
}

.page-disclaimer .usage-hero__eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--lake);
}

.page-disclaimer .usage-hero__title {
  margin: 0;
  font-size: clamp(32px, 6.2vw, 68px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-disclaimer .usage-hero__lede {
  margin: 0;
  font-size: clamp(15.5px, 1.7vw, 17.5px);
  line-height: 1.85;
  color: var(--graphite);
}

.page-disclaimer .usage-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin: 0;
  padding: 14px 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--graphite);
}

.page-disclaimer .usage-hero__meta li {
  position: relative;
  padding-left: 14px;
}

.page-disclaimer .usage-hero__meta li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 6px;
  height: 6px;
  background: var(--rape);
  transform: translateY(-50%);
}

.page-disclaimer .usage-hero__meta li:first-child::before {
  background: var(--signal);
}

@media (min-width: 900px) {
  .page-disclaimer .usage-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
    column-gap: clamp(24px, 3vw, 48px);
  }
  .page-disclaimer .usage-hero__eyebrow,
  .page-disclaimer .usage-hero__meta {
    grid-column: 1 / -1;
  }
  .page-disclaimer .usage-hero__title {
    grid-column: 1;
  }
  .page-disclaimer .usage-hero__lede {
    grid-column: 2;
    padding-bottom: 6px;
  }
}

/* ---------- 顶部配图 ---------- */
.page-disclaimer .usage-banner {
  position: relative;
  margin: 0 0 clamp(26px, 4vw, 46px);
}

.page-disclaimer .usage-banner::before {
  content: "";
  position: absolute;
  left: 0;
  top: -12px;
  width: 76px;
  height: 4px;
  background: var(--rape);
}

.page-disclaimer .usage-banner img {
  display: block;
  width: 100%;
  height: clamp(190px, 34vw, 360px);
  object-fit: cover;
  max-width: 100%;
}

.page-disclaimer .usage-banner__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: .02em;
  color: var(--graphite);
}

/* ---------- 主体网格 ---------- */
.page-disclaimer .usage-body {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  padding-bottom: clamp(48px, 7vw, 88px);
}

@media (min-width: 1000px) {
  .page-disclaimer .usage-body {
    grid-template-columns: minmax(0, 1fr) 302px;
    align-items: start;
    column-gap: clamp(34px, 4vw, 64px);
  }
  .page-disclaimer .usage-flow {
    grid-column: 1;
    grid-row: 1;
  }
  .page-disclaimer .usage-rail {
    grid-column: 2;
    grid-row: 1;
    position: sticky;
    top: 96px;
  }
}

/* ---------- 正文章节 ---------- */
.page-disclaimer .usage-section {
  padding: clamp(22px, 3vw, 34px) 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 96px;
  transition: background-color .2s var(--ease);
}

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

.page-disclaimer .usage-section:target {
  background: var(--lake-mist);
  box-shadow: -18px 0 0 var(--lake-mist), 18px 0 0 var(--lake-mist);
}

.page-disclaimer .usage-section__head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.page-disclaimer .usage-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  min-width: clamp(40px, 5vw, 50px);
  height: clamp(40px, 5vw, 50px);
  background: var(--rape);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: clamp(15px, 1.8vw, 19px);
  font-weight: 700;
  letter-spacing: .04em;
}

.page-disclaimer .usage-section__title {
  margin: 0;
  font-size: clamp(20px, 2.7vw, 27px);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-disclaimer .usage-section p {
  margin: 0 0 14px;
  max-width: 62ch;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--ink);
}

.page-disclaimer .usage-section p:last-child {
  margin-bottom: 0;
}

/* ---------- 编号条目 ---------- */
.page-disclaimer .rule-list {
  list-style: none;
  counter-reset: pd-rule;
  margin: 18px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-disclaimer .rule-list > li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 16px;
  line-height: 1.8;
  color: var(--graphite);
}

.page-disclaimer .rule-list > li::before {
  counter-increment: pd-rule;
  content: counter(pd-rule, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--lake);
  padding-top: 4px;
}

.page-disclaimer .rule-list strong {
  color: var(--ink);
  font-weight: 700;
}

/* ---------- 引用示例 ---------- */
.page-disclaimer .cite-samples {
  display: grid;
  gap: 10px;
  margin: 18px 0 20px;
}

.page-disclaimer .cite-sample {
  background: var(--ink);
  border-left: 4px solid var(--rape);
  padding: 15px 18px;
}

.page-disclaimer .cite-sample__label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--rape);
}

.page-disclaimer .cite-sample__code {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--snow);
  word-break: break-word;
  user-select: all;
}

/* ---------- 轮次数据带 ---------- */
.page-disclaimer .round-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 20px 0 4px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-disclaimer .round-strip > div {
  background: var(--snow);
  padding: 15px 14px;
}

.page-disclaimer .round-strip__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--lake);
}

.page-disclaimer .round-strip__label {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  letter-spacing: .02em;
  color: var(--graphite);
}

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

/* ---------- 联系卡 ---------- */
.page-disclaimer .usage-contact {
  display: grid;
  gap: 1px;
  margin: 22px 0 20px;
  background: var(--line);
  border: 1px solid var(--lake);
}

.page-disclaimer .usage-contact > div {
  background: var(--lake-mist);
  padding: 15px 17px;
}

.page-disclaimer .usage-contact__label {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--lake-deep);
}

.page-disclaimer .usage-contact__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink);
  word-break: break-word;
}

.page-disclaimer .usage-contact__value--plain {
  font-family: var(--font-sans);
  font-size: 15px;
}

@media (min-width: 640px) {
  .page-disclaimer .usage-contact {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 章节尾注 ---------- */
.page-disclaimer .usage-tail {
  margin: 0;
  padding-top: 16px;
  border-top: 1px solid var(--line-soft);
  font-size: 15px;
  line-height: 1.9;
  color: var(--graphite);
}

.page-disclaimer .usage-tail a {
  color: var(--lake);
  text-decoration: none;
  border-bottom: 1px solid rgba(10, 110, 138, .34);
  transition: border-color .16s var(--ease), color .16s var(--ease);
}

.page-disclaimer .usage-tail a:hover {
  color: var(--lake-deep);
  border-bottom-color: var(--lake-deep);
}

/* ---------- 侧栏 ---------- */
.page-disclaimer .usage-rail {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-disclaimer .usage-index {
  border-top: 3px solid var(--ink);
  padding-top: 12px;
}

.page-disclaimer .usage-index__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--graphite);
}

.page-disclaimer .usage-index__list {
  list-style: none;
  counter-reset: pd-idx;
  margin: 0;
  padding: 0;
}

.page-disclaimer .usage-index__list li {
  border-bottom: 1px solid var(--line-soft);
}

.page-disclaimer .usage-index__list a {
  display: flex;
  gap: 10px;
  padding: 9px 0;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--ink);
  text-decoration: none;
  transition: color .16s var(--ease), padding-left .16s var(--ease);
}

.page-disclaimer .usage-index__list a::before {
  counter-increment: pd-idx;
  content: counter(pd-idx, decimal-leading-zero);
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--graphite);
  padding-top: 4px;
}

.page-disclaimer .usage-index__list a:hover {
  color: var(--lake);
  padding-left: 4px;
}

.page-disclaimer .usage-note {
  background: var(--lake-mist);
  border-left: 4px solid var(--lake);
  padding: 15px 17px;
  transition: box-shadow .2s var(--ease);
}

.page-disclaimer .usage-note:hover {
  box-shadow: inset 0 0 0 999px rgba(6, 74, 94, .06);
}

.page-disclaimer .usage-note__title {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--lake-deep);
}

.page-disclaimer .usage-note p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink);
}

@media (max-width: 999px) {
  .page-disclaimer .usage-index__list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 18px;
  }
}