.page-disclaimer {
  --u-num: 40px;
  --u-clause-pad: clamp(24px, 4vw, 46px);
  background: var(--indigo-900);
  color: var(--paper);
}

.page-disclaimer .usage-crumb {
  padding-top: clamp(18px, 3vw, 34px);
}

/* ---------- 首屏声明 ---------- */
.page-disclaimer .usage-masthead {
  padding: clamp(22px, 4vw, 48px) 0 clamp(30px, 5vw, 68px);
  border-bottom: 1px solid var(--line-dark);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(198, 242, 78, 0.10), transparent 62%),
    linear-gradient(180deg, rgba(20, 27, 58, 0.55), rgba(11, 16, 38, 0) 70%);
}

.page-disclaimer .usage-masthead__inner {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
}

.page-disclaimer .usage-masthead__lead {
  max-width: 62ch;
}

.page-disclaimer .usage-masthead h1 {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: clamp(34px, 7vw, 74px);
  line-height: 1.02;
  letter-spacing: -0.012em;
  color: var(--paper);
}

.page-disclaimer .usage-lede {
  margin: 18px 0 0;
  font-family: var(--font-body);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--lake-300);
  max-width: 44em;
}

.page-disclaimer .usage-masthead__facts {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line-lime);
  align-self: end;
}

.page-disclaimer .usage-masthead__facts > div {
  padding: 14px 0 12px;
  border-bottom: 1px solid var(--line-dark);
}

.page-disclaimer .usage-masthead__facts > div:nth-child(odd) {
  padding-right: 14px;
}

.page-disclaimer .usage-masthead__facts > div:nth-child(even) {
  padding-left: 14px;
  border-left: 1px solid var(--line-dark);
}

.page-disclaimer .usage-masthead__facts dt {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-disclaimer .usage-masthead__facts dd {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(18px, 2.4vw, 26px);
  letter-spacing: -0.01em;
  color: var(--lime);
}

/* ---------- 条款索引 ---------- */
.page-disclaimer .usage-index {
  background: var(--indigo-800);
  border-bottom: 1px solid var(--line-dark);
  padding: 16px 0;
}

.page-disclaimer .usage-index__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 30px;
}

.page-disclaimer .usage-index__label {
  margin: 0;
  color: var(--muted);
}

.page-disclaimer .usage-index__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
}

.page-disclaimer .usage-index__list a {
  display: inline-block;
  padding-bottom: 2px;
  font-size: 13px;
  letter-spacing: 0.03em;
  color: var(--lake-300);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-disclaimer .usage-index__list a:hover,
.page-disclaimer .usage-index__list a:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

.page-disclaimer .usage-index__list .mono {
  margin-right: 7px;
  font-size: 12px;
  color: var(--amber);
}

/* ---------- 条款主体 ---------- */
.page-disclaimer .usage-clauses {
  padding: clamp(8px, 2vw, 22px) 0 clamp(38px, 6vw, 84px);
}

.page-disclaimer .usage-clause {
  display: grid;
  grid-template-columns: var(--u-num) minmax(0, 1fr);
  gap: 8px 16px;
  padding: var(--u-clause-pad) 0;
  border-bottom: 1px solid var(--line-dark);
  scroll-margin-top: 110px;
}

.page-disclaimer .usage-clause__num {
  margin: 0;
  position: relative;
  padding-left: 13px;
  font-family: var(--font-mono);
  font-size: clamp(17px, 3vw, 26px);
  line-height: 1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--lime);
}

.page-disclaimer .usage-clause__num::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.1em;
  width: 3px;
  height: 1.7em;
  background: currentColor;
}

.page-disclaimer .usage-clause--deny .usage-clause__num {
  color: var(--lava);
}

.page-disclaimer .usage-clause__body {
  min-width: 0;
  max-width: 70ch;
}

.page-disclaimer .usage-clause--wide .usage-clause__body {
  max-width: none;
}

.page-disclaimer .usage-clause__title {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: clamp(21px, 3.4vw, 34px);
  line-height: 1.16;
  letter-spacing: -0.005em;
  color: var(--paper);
}

.page-disclaimer .usage-clause__text {
  margin: 0 0 16px;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.78;
  color: var(--lake-300);
}

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

.page-disclaimer .usage-clause__text a {
  color: var(--lime);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 列表基础 ---------- */
.page-disclaimer .usage-list,
.page-disclaimer .usage-marklist,
.page-disclaimer .usage-deny-list {
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 11px;
  font-family: var(--font-body);
  font-size: 15.5px;
  line-height: 1.72;
  color: var(--lake-300);
}

.page-disclaimer .usage-list li,
.page-disclaimer .usage-deny-list li {
  position: relative;
  padding-left: 19px;
}

.page-disclaimer .usage-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 10px;
  height: 1px;
  background: var(--lime);
}

.page-disclaimer .usage-list--lava li::before {
  background: var(--lava);
}

.page-disclaimer .usage-deny-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 10px;
  height: 1px;
  background: var(--lava);
}

.page-disclaimer .usage-list strong,
.page-disclaimer .usage-deny-list strong {
  font-family: var(--font-head);
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--paper);
}

/* ---------- 标注清单 ---------- */
.page-disclaimer .usage-marklist li {
  display: grid;
  grid-template-columns: 3.4em minmax(0, 1fr);
  gap: 4px 14px;
  padding: 12px 0 12px 14px;
  border-left: 2px solid var(--lime-deep);
  border-bottom: 1px solid var(--line-soft);
}

.page-disclaimer .usage-marklist .mono {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--amber);
  padding-top: 0.25em;
}

/* ---------- 标注模板 ---------- */
.page-disclaimer .usage-template {
  margin: 22px 0 0;
  padding: 16px 18px;
  border: 1px solid var(--line-lime);
  border-radius: var(--radius-card);
  background: rgba(198, 242, 78, 0.06);
}

.page-disclaimer .usage-template .index {
  margin: 0 0 9px;
  color: var(--lime);
}

.page-disclaimer .usage-template__line {
  margin: 0;
  font-size: 13px;
  line-height: 1.9;
  color: var(--paper);
  word-break: break-word;
}

/* ---------- 配图 ---------- */
.page-disclaimer .usage-figure {
  margin: 26px 0 0;
}

.page-disclaimer .usage-figure img {
  display: block;
  width: 100%;
  height: auto;
}

/* ---------- 字段对照表 ---------- */
.page-disclaimer .table-wrap {
  border: 1px solid var(--line-dark);
  margin-bottom: 14px;
}

.page-disclaimer .data-table {
  min-width: 720px;
  font-size: 14px;
}

.page-disclaimer .data-table th[scope="row"] {
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--lime);
}

.page-disclaimer .usage-note {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.03em;
  color: var(--muted);
}

/* ---------- 适用范围收束 ---------- */
.page-disclaimer .usage-scope {
  background: var(--lake-100);
  color: var(--indigo-900);
  border-top: 3px solid var(--lava);
  padding: clamp(30px, 5vw, 68px) 0 clamp(38px, 6vw, 86px);
}

.page-disclaimer .usage-scope__inner {
  display: grid;
  gap: 14px;
  max-width: 74ch;
}

.page-disclaimer .usage-scope__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--lava);
}

.page-disclaimer .usage-scope__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: clamp(24px, 4vw, 40px);
  line-height: 1.12;
  color: var(--indigo-900);
}

.page-disclaimer .usage-scope p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.78;
  color: var(--indigo-700);
}

.page-disclaimer .usage-scope a:not(.btn) {
  color: var(--indigo-900);
  text-decoration: underline 2px var(--lime-deep);
  text-underline-offset: 3px;
}

.page-disclaimer .usage-scope__back {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 900px) {
  .page-disclaimer {
    --u-num: 96px;
  }

  .page-disclaimer .usage-clause {
    gap: 10px 24px;
  }
}

@media (min-width: 1024px) {
  .page-disclaimer .usage-masthead__inner {
    grid-template-columns: minmax(0, 1.6fr) minmax(280px, 0.85fr);
    align-items: end;
    gap: clamp(32px, 5vw, 72px);
  }

  .page-disclaimer .usage-index__inner {
    justify-content: flex-start;
  }
}

@media (max-width: 520px) {
  .page-disclaimer .usage-masthead__facts {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-disclaimer .usage-masthead__facts > div:nth-child(even) {
    padding-left: 0;
    border-left: 0;
  }

  .page-disclaimer .usage-clause {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }

  .page-disclaimer .usage-clause__num {
    padding-left: 11px;
    font-size: 16px;
  }

  .page-disclaimer .usage-marklist li {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .usage-index__list a {
    transition-duration: 1ms;
  }
}