.page-disclaimer {
  --u-clause-pad: 28px;
  --u-grid-line: rgba(199, 204, 214, 0.06);
  display: block;
}

/* ---------- 面包屑 ---------- */
.page-disclaimer .breadcrumbs {
  padding-top: 22px;
}

/* ---------- 框景首屏 ---------- */
.page-disclaimer .usage-hero {
  position: relative;
  padding: 26px 0 0;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 90% at 88% -20%, rgba(58, 134, 255, 0.16), transparent 62%),
    radial-gradient(90% 80% at 4% 0%, rgba(57, 255, 136, 0.09), transparent 58%);
}

.page-disclaimer .usage-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, var(--u-grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--u-grid-line) 1px, transparent 1px);
  background-size: 68px 68px;
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, transparent 78%);
  mask-image: linear-gradient(to bottom, #000 0%, transparent 78%);
}

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

.page-disclaimer .usage-hero__title {
  margin: 16px 0 0;
  font-family: var(--font-sans);
  font-size: clamp(40px, 8vw, 68px);
  font-weight: 250;
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-disclaimer .usage-hero__lede {
  max-width: 62ch;
  margin: 18px 0 0;
  font-size: 16px;
  line-height: 29px;
  color: var(--silver);
}

.page-disclaimer .usage-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 30px;
  margin: 30px 0 0;
  padding: 16px 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-disclaimer .usage-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 9px;
  min-width: 0;
}

.page-disclaimer .usage-hero__k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--silver);
  opacity: 0.75;
}

.page-disclaimer .usage-hero__v {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--green);
}

.page-disclaimer .usage-hero__figure {
  position: relative;
  z-index: 1;
  margin: 30px 0 0;
}

.page-disclaimer .usage-hero__figure .figure__media {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.page-disclaimer .usage-hero__figure .figure__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--silver);
  opacity: 0.7;
}

/* ---------- 正文骨架 ---------- */
.page-disclaimer .usage-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
  padding-top: 44px;
  padding-bottom: 64px;
}

/* ---------- 目录 ---------- */
.page-disclaimer .usage-toc {
  align-self: start;
}

.page-disclaimer .usage-toc__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--silver);
  opacity: 0.72;
}

.page-disclaimer .usage-toc__list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-disclaimer .usage-toc__link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 11px 10px 11px 12px;
  border-left: 2px solid transparent;
  color: var(--silver);
  font-size: 14px;
  line-height: 20px;
  text-decoration: none;
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-disclaimer .usage-toc__link:hover {
  color: var(--white);
  background: var(--panel);
  border-left-color: var(--green);
}

.page-disclaimer .usage-toc__link:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
  color: var(--white);
}

.page-disclaimer .usage-toc__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--green);
}

/* ---------- 条款列表 ---------- */
.page-disclaimer .usage-clauses {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.page-disclaimer .usage-clause {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  padding: var(--u-clause-pad) 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-h) + 24px);
  transition: border-color 0.25s var(--ease);
}

.page-disclaimer .usage-clause:last-of-type {
  border-bottom: 1px solid var(--line);
}

.page-disclaimer .usage-clause:target {
  border-top-color: var(--green);
}

.page-disclaimer .usage-clause__mark {
  line-height: 1;
}

.page-disclaimer .usage-clause__num {
  display: inline-block;
  padding: 3px 9px;
  border: 1px solid rgba(57, 255, 136, 0.35);
  border-radius: var(--radius);
  background: var(--green-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--green);
  transition: color 0.25s var(--ease), background-color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-disclaimer .usage-clause:target .usage-clause__num {
  color: var(--white);
  border-color: var(--green);
  background: rgba(57, 255, 136, 0.2);
}

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

.page-disclaimer .usage-clause__title {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 23px;
  font-weight: 400;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-disclaimer .usage-clause__content p {
  margin: 14px 0 0;
  max-width: 68ch;
  font-size: 15.5px;
  line-height: 28px;
  color: var(--ink);
}

.page-disclaimer .usage-clause__content a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-disclaimer .usage-clause__content a:hover {
  color: var(--green);
}

.page-disclaimer .usage-clause__content a:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

/* ---------- 列表 ---------- */
.page-disclaimer .usage-list {
  display: grid;
  gap: 10px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .usage-list li {
  position: relative;
  padding-left: 22px;
  max-width: 68ch;
  font-size: 15px;
  line-height: 26px;
  color: var(--ink);
}

.page-disclaimer .usage-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 10px;
  height: 1px;
  background: var(--green);
}

/* ---------- 联系卡 ---------- */
.page-disclaimer .usage-contact {
  margin: 20px 0 0;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--orange);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow-soft);
}

.page-disclaimer .usage-contact__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-disclaimer .usage-contact__mail {
  display: inline-block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--ink);
  text-decoration: none;
  word-break: break-all;
  transition: color 0.2s var(--ease);
}

.page-disclaimer .usage-contact__mail:hover {
  color: var(--green);
}

.page-disclaimer .usage-contact__mail:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

.page-disclaimer .usage-contact__note {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 22px;
  color: var(--silver);
}

/* ---------- 底部导航 ---------- */
.page-disclaimer .usage-footnav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 34px;
}

/* ---------- 桌面版 ---------- */
@media (min-width: 900px) {
  .page-disclaimer {
    --u-clause-pad: 34px;
  }

  .page-disclaimer .usage-hero {
    padding-top: 40px;
  }

  .page-disclaimer .usage-hero__figure {
    margin-top: 38px;
  }

  .page-disclaimer .usage-body {
    grid-template-columns: 212px minmax(0, 1fr);
    gap: 72px;
    padding-top: 68px;
    padding-bottom: 96px;
  }

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

  .page-disclaimer .usage-clause {
    grid-template-columns: 82px minmax(0, 1fr);
    gap: 30px;
  }

  .page-disclaimer .usage-footnav {
    margin-top: 44px;
    padding-top: 26px;
    border-top: 1px solid var(--line);
  }
}

/* ---------- 打印 ---------- */
@media print {
  .page-disclaimer .usage-hero {
    background: none;
  }

  .page-disclaimer .usage-hero::after,
  .page-disclaimer .usage-toc,
  .page-disclaimer .usage-footnav {
    display: none;
  }

  .page-disclaimer .usage-clause {
    break-inside: avoid;
    border-top-color: #999;
  }
}