.page-disclaimer {
  --ag-indent: 0px;
  --ag-line: rgba(61, 242, 200, 0.24);
  --ag-line-soft: rgba(234, 244, 240, 0.10);
  --ag-num-size: clamp(1.6rem, 5vw, 2.5rem);

  position: relative;
  display: block;
  overflow-x: hidden;
  padding-bottom: var(--step-72);
  color: var(--c-fog);
  background:
    radial-gradient(120% 55% at 8% -8%, rgba(16, 58, 46, 0.92), transparent 62%),
    radial-gradient(85% 45% at 102% 2%, rgba(10, 46, 58, 0.72), transparent 58%),
    var(--c-base);
}

.page-disclaimer .agreement-rail {
  height: 2px;
  width: 100%;
  background: linear-gradient(
    90deg,
    rgba(61, 242, 200, 0) 0%,
    var(--c-accent) 16%,
    rgba(61, 242, 200, 0.16) 78%,
    rgba(61, 242, 200, 0) 100%
  );
}

.page-disclaimer .disclaimer-shell {
  width: 100%;
  max-width: var(--wrap-narrow);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* 面包屑 */
.page-disclaimer .breadcrumb {
  padding-top: var(--step-32);
}

.page-disclaimer .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-data);
  font-size: var(--step-12);
  letter-spacing: 0.04em;
  color: var(--c-ash);
}

.page-disclaimer .breadcrumb-list li + li::before {
  content: "/";
  margin-right: 0.5rem;
  color: rgba(143, 163, 155, 0.45);
}

.page-disclaimer .breadcrumb-list a {
  color: var(--c-ash);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 160ms ease, border-color 160ms ease;
}

.page-disclaimer .breadcrumb-list a:hover,
.page-disclaimer .breadcrumb-list a:focus-visible {
  color: var(--c-accent);
  border-bottom-color: var(--ag-line);
}

/* 首屏说明 */
.page-disclaimer .agreement-intro {
  display: grid;
  gap: var(--step-16);
  padding-top: var(--step-32);
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-disclaimer .agreement-intro .section-kicker {
  margin: 0;
  font-family: var(--font-data);
  font-size: var(--step-12);
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--c-accent);
}

.page-disclaimer h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 8vw, 3.75rem);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--c-fog);
}

.page-disclaimer .agreement-lede {
  margin: 0;
  max-width: 34em;
  font-size: var(--step-18);
  line-height: 1.8;
  color: rgba(234, 244, 240, 0.84);
}

.page-disclaimer .agreement-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--step-12) var(--step-24);
  margin: 0;
  padding-top: var(--step-16);
  border-top: 1px solid var(--ag-line-soft);
  font-family: var(--font-data);
  font-size: var(--step-12);
  letter-spacing: 0.06em;
  color: var(--c-ash);
}

/* 顶部横幅 */
.page-disclaimer .legal-banner {
  margin: var(--step-48) 0 0;
}

.page-disclaimer .legal-banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--ag-line-soft);
  filter: brightness(0.82) saturate(0.96);
}

/* 条款 */
.page-disclaimer .clause-stack {
  margin-top: var(--step-48);
}

.page-disclaimer .clause {
  border-top: 1px solid var(--ag-line-soft);
}

.page-disclaimer .clause:last-child {
  border-bottom: 1px solid var(--ag-line-soft);
}

.page-disclaimer .clause > summary {
  display: flex;
  align-items: baseline;
  gap: var(--step-16);
  padding: var(--step-24) 0 var(--step-16);
  cursor: pointer;
  list-style: none;
  -webkit-tap-highlight-color: transparent;
}

.page-disclaimer .clause > summary::-webkit-details-marker {
  display: none;
}

.page-disclaimer .clause > summary::marker {
  content: "";
}

.page-disclaimer .clause > summary::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-data);
  font-size: var(--step-18);
  line-height: 1;
  color: var(--c-ash);
  transition: color 180ms ease;
}

.page-disclaimer .clause[open] > summary::after {
  content: "–";
  color: var(--c-accent);
}

.page-disclaimer .clause > summary:hover::after,
.page-disclaimer .clause > summary:focus-visible::after {
  color: var(--c-accent);
}

.page-disclaimer .clause > summary:focus-visible {
  outline: 1px solid var(--c-accent);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}

.page-disclaimer .clause-title {
  flex: 1 1 auto;
  display: flex;
  align-items: baseline;
  gap: var(--step-12);
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 3.6vw, 1.55rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.3;
  color: var(--c-fog);
}

.page-disclaimer .clause-num {
  flex: 0 0 auto;
  min-width: 2.2ch;
  font-family: var(--font-data);
  font-size: var(--ag-num-size);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  color: rgba(61, 242, 200, 0.32);
  transition: color 180ms ease;
}

.page-disclaimer .clause[open] .clause-num {
  color: rgba(61, 242, 200, 0.62);
}

.page-disclaimer .clause-body {
  padding-bottom: var(--step-32);
}

.page-disclaimer .clause-body p {
  margin: 0 0 var(--step-16);
  font-size: var(--step-16);
  line-height: 1.85;
  color: rgba(234, 244, 240, 0.84);
}

.page-disclaimer .clause-body p:last-child {
  margin-bottom: 0;
}

.page-disclaimer .clause-body a {
  color: var(--c-accent);
  text-decoration: none;
  border-bottom: 1px solid var(--ag-line);
}

.page-disclaimer .clause-body a:hover,
.page-disclaimer .clause-body a:focus-visible {
  border-bottom-color: var(--c-accent);
}

/* 结尾引导 */
.page-disclaimer .agreement-outro {
  display: grid;
  gap: var(--step-16);
  margin-top: var(--step-72);
  padding-top: var(--step-32);
  border-top: 1px solid var(--ag-line);
}

.page-disclaimer .outro-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 4vw, 1.85rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--c-fog);
}

.page-disclaimer .agreement-outro p {
  margin: 0;
  font-size: var(--step-16);
  line-height: 1.85;
  color: rgba(234, 244, 240, 0.82);
}

.page-disclaimer .outro-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--step-12);
  padding-top: var(--step-12);
}

/* 返回顶部 */
.page-disclaimer .back-top {
  position: fixed;
  right: clamp(0.75rem, 3vw, 1.5rem);
  bottom: clamp(0.75rem, 3vw, 1.5rem);
  z-index: 40;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 0.5rem 0.7rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--ag-line);
  background: rgba(234, 244, 240, 0.08);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  color: var(--c-accent);
  font-family: var(--font-data);
  font-size: var(--step-12);
  line-height: 1.2;
  text-decoration: none;
  transition: background-color 180ms ease, border-color 180ms ease;
}

.page-disclaimer .back-top:hover,
.page-disclaimer .back-top:focus-visible {
  background: rgba(61, 242, 200, 0.16);
  border-color: var(--c-accent);
}

.page-disclaimer .back-top-arrow {
  font-size: var(--step-14);
  line-height: 1;
}

@media (min-width: 860px) {
  .page-disclaimer {
    --ag-indent: 5.5rem;
  }

  .page-disclaimer .clause-num {
    min-width: 3ch;
  }

  .page-disclaimer .clause > summary {
    padding: var(--step-32) 0 var(--step-24);
  }

  .page-disclaimer .clause-body {
    padding-left: var(--ag-indent);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .breadcrumb-list a,
  .page-disclaimer .clause > summary::after,
  .page-disclaimer .clause-num,
  .page-disclaimer .back-top {
    transition: none;
  }
}