.page-disclaimer {
  --doc-rail: 76px;
  --doc-gap: clamp(16px, 2.4vw, 36px);
  --doc-panel-soft: rgba(12, 44, 36, 0.72);
  position: relative;
  isolation: isolate;
  overflow-x: clip;
  padding-block: clamp(22px, 3.5vw, 48px) clamp(64px, 9vw, 120px);
  background:
    linear-gradient(155deg, var(--arena-ink) 0%, var(--arena-slate-a) 54%, var(--arena-ink) 100%);
  color: var(--arena-text);
}

.page-disclaimer::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    12deg,
    rgba(47, 243, 208, 0.05) 0 1px,
    transparent 1px 88px
  );
}

.page-disclaimer > * {
  position: relative;
  z-index: 1;
}

/* 面包屑 */
.page-disclaimer .doc-crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--arena-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-disclaimer .doc-crumbs li {
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-disclaimer .doc-crumbs li + li::before {
  content: "/";
  color: var(--arena-quiet);
}

.page-disclaimer .doc-crumbs a {
  color: var(--arena-muted);
  text-decoration: none;
}

.page-disclaimer .doc-crumbs a:hover,
.page-disclaimer .doc-crumbs a:focus-visible {
  color: var(--arena-cyan-soft);
}

.page-disclaimer .doc-crumbs [aria-current="page"] {
  color: var(--arena-cyan);
}

/* 首屏 */
.page-disclaimer .doc-hero {
  display: grid;
  gap: clamp(14px, 2.2vw, 22px);
  max-width: 900px;
  padding-block: clamp(26px, 4.5vw, 52px) clamp(22px, 3.4vw, 38px);
}

.page-disclaimer .doc-kicker {
  margin: 0;
  font-family: var(--arena-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--arena-cyan);
}

.page-disclaimer .doc-title {
  margin: 0;
  font-size: clamp(36px, 7vw, 72px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.035em;
}

.page-disclaimer .doc-lede {
  margin: 0;
  max-width: 64ch;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.75;
  color: var(--arena-text);
}

.page-disclaimer .hero-meta {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 6px 0 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--arena-line);
  border-radius: var(--arena-radius-md);
  background: var(--arena-line);
  overflow: hidden;
}

.page-disclaimer .hero-meta li {
  display: grid;
  gap: 6px;
  padding: 15px 18px;
  background: var(--doc-panel-soft);
}

.page-disclaimer .hero-meta .arena-mono {
  font-size: 20px;
  letter-spacing: 0.04em;
  color: var(--arena-cyan);
  font-variant-numeric: tabular-nums;
}

.page-disclaimer .hero-meta li > span:last-child {
  font-size: 13px;
  line-height: 1.6;
  color: var(--arena-muted);
}

/* 页头横幅 */
.page-disclaimer .doc-banner {
  margin: 0;
  border: 1px solid var(--arena-line);
  border-radius: 8px var(--arena-radius-lg) var(--arena-radius-lg) 8px;
  overflow: hidden;
  background: var(--arena-panel);
}

.page-disclaimer .doc-banner img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 340px;
  object-fit: cover;
  object-position: center 40%;
}

/* 条款目录 */
.page-disclaimer .clause-toc {
  margin-top: clamp(24px, 4vw, 44px);
  padding: clamp(18px, 3vw, 26px) clamp(18px, 3vw, 30px) clamp(20px, 3vw, 28px);
  background: linear-gradient(118deg, var(--arena-slate-a) 0%, var(--arena-slate-b) 100%);
  border: 1px solid var(--arena-line);
  border-radius: var(--arena-radius-lg) var(--arena-radius-lg) var(--arena-radius-lg) 8px;
}

.page-disclaimer .toc-head {
  margin: 0 0 14px;
  font-family: var(--arena-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--arena-cyan);
}

.page-disclaimer .toc-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .toc-list a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 9px 10px;
  border: 1px solid transparent;
  border-radius: 12px;
  font-size: 15px;
  color: var(--arena-text);
  text-decoration: none;
  transition: background 0.2s var(--arena-ease), border-color 0.2s var(--arena-ease);
}

.page-disclaimer .toc-list a:hover,
.page-disclaimer .toc-list a:focus-visible {
  background: rgba(47, 243, 208, 0.08);
  border-color: var(--arena-line);
  outline: none;
}

.page-disclaimer .toc-list .arena-mono {
  font-size: 13px;
  color: var(--arena-cyan);
  font-variant-numeric: tabular-nums;
}

/* 条款主体 */
.page-disclaimer .clause-stack {
  margin-top: clamp(28px, 4.5vw, 56px);
}

.page-disclaimer .clause {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  padding-block: clamp(26px, 4vw, 46px);
  border-top: 1px solid var(--arena-line);
  scroll-margin-top: 120px;
}

.page-disclaimer .clause:first-child {
  border-top: 0;
}

.page-disclaimer .clause-rail {
  display: flex;
  align-items: flex-start;
}

.page-disclaimer .clause-no {
  font-family: var(--arena-mono);
  font-size: clamp(20px, 2.4vw, 30px);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--arena-cyan);
  font-variant-numeric: tabular-nums;
}

.page-disclaimer .clause-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 18px;
  margin-bottom: 14px;
}

.page-disclaimer .clause-title {
  margin: 0;
  font-size: clamp(20px, 2.6vw, 28px);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: -0.02em;
}

.page-disclaimer .clause-copy {
  flex: none;
  appearance: none;
  padding: 6px 13px;
  border: 1px solid var(--arena-line);
  border-radius: 999px;
  background: transparent;
  color: var(--arena-muted);
  font-family: var(--arena-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: color 0.2s var(--arena-ease), border-color 0.2s var(--arena-ease);
}

.page-disclaimer .clause-copy:hover,
.page-disclaimer .clause-copy:focus-visible {
  color: var(--arena-cyan);
  border-color: var(--arena-cyan);
  outline: none;
}

.page-disclaimer .clause-copy[data-copied] {
  color: var(--arena-cyan);
  border-color: var(--arena-cyan);
}

.page-disclaimer .clause-body {
  max-width: 84ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--arena-text);
}

.page-disclaimer .clause-body p {
  margin: 0 0 14px;
  break-inside: avoid;
}

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

.page-disclaimer .clause-body a {
  color: var(--arena-cyan-soft);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-decoration-color: rgba(47, 243, 208, 0.45);
  text-underline-offset: 4px;
}

.page-disclaimer .clause-body a:hover,
.page-disclaimer .clause-body a:focus-visible {
  color: var(--arena-cyan);
  text-decoration-color: var(--arena-cyan);
}

.page-disclaimer .clause-list {
  margin: 0 0 16px;
  padding: 0;
  list-style: none;
}

.page-disclaimer .clause-list li {
  position: relative;
  margin-bottom: 9px;
  padding-left: 20px;
  break-inside: avoid;
}

.page-disclaimer .clause-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 8px;
  height: 1px;
  background: var(--arena-cyan);
}

.page-disclaimer .clause-list strong {
  font-weight: 600;
  color: var(--arena-cyan-soft);
}

/* 折叠说明 */
.page-disclaimer .clause-fold {
  margin: 18px 0 0;
  padding: 0 16px;
  border: 1px solid var(--arena-line);
  border-radius: var(--arena-radius-sm);
  background: var(--doc-panel-soft);
  break-inside: avoid;
}

.page-disclaimer .clause-fold summary {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--arena-cyan-soft);
  cursor: pointer;
  list-style: none;
}

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

.page-disclaimer .clause-fold summary::before {
  content: "+";
  font-family: var(--arena-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--arena-cyan);
}

.page-disclaimer .clause-fold[open] summary::before {
  content: "–";
}

.page-disclaimer .clause-fold p {
  margin: 0 0 16px;
}

/* 灰蓝色带 */
.page-disclaimer .band {
  margin-block: clamp(32px, 5vw, 64px);
  padding-block: clamp(24px, 4vw, 52px);
  background: linear-gradient(105deg, var(--arena-slate-a) 0%, var(--arena-slate-b) 100%);
  border-block: 1px solid var(--arena-line);
  border-radius: 8px var(--arena-radius-lg) var(--arena-radius-lg) 8px;
}

.page-disclaimer .clause-stack--band {
  margin-top: 0;
}

.page-disclaimer .band .clause:first-child {
  border-top: 0;
}

/* 联系方式 */
.page-disclaimer .contact-list {
  margin: 0 0 16px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
  break-inside: avoid;
}

.page-disclaimer .contact-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding: 12px 16px;
  border: 1px solid var(--arena-line);
  border-radius: var(--arena-radius-sm);
  background: var(--doc-panel-soft);
  break-inside: avoid;
}

.page-disclaimer .contact-list .arena-mono {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--arena-muted);
  min-width: 34px;
}

.page-disclaimer .contact-list a {
  color: var(--arena-cyan-soft);
  text-decoration: none;
  word-break: break-all;
}

.page-disclaimer .contact-list a:hover,
.page-disclaimer .contact-list a:focus-visible {
  color: var(--arena-cyan);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* 页面信息条 */
.page-disclaimer .doc-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 22px;
  margin: clamp(40px, 6vw, 72px) 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--arena-line);
  font-family: var(--arena-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--arena-muted);
}

.page-disclaimer .doc-foot .stamp {
  padding: 3px 11px;
  border: 1px solid rgba(255, 196, 107, 0.45);
  border-radius: 999px;
  color: var(--arena-amber);
}

/* 返回顶部 */
.page-disclaimer .to-top {
  position: fixed;
  right: clamp(14px, 3vw, 28px);
  bottom: clamp(14px, 3vw, 28px);
  z-index: 60;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border: 1px solid var(--arena-line);
  border-radius: 999px;
  background: var(--arena-panel);
  color: var(--arena-cyan);
  font-family: var(--arena-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-decoration: none;
  box-shadow: 0 12px 30px rgba(3, 14, 11, 0.6);
  transition: border-color 0.2s var(--arena-ease), color 0.2s var(--arena-ease);
}

.page-disclaimer .to-top:hover,
.page-disclaimer .to-top:focus-visible {
  border-color: var(--arena-cyan);
  color: var(--arena-cyan-soft);
  outline: none;
}

/* 断点：平板起两栏信息块 */
@media (min-width: 620px) {
  .page-disclaimer .hero-meta {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-disclaimer .toc-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 22px;
  }
}

/* 断点：桌面条款编号独立成列 */
@media (min-width: 900px) {
  .page-disclaimer .clause {
    grid-template-columns: var(--doc-rail) minmax(0, 1fr);
    gap: var(--doc-gap);
  }

  .page-disclaimer .clause-rail {
    padding-top: 4px;
  }

  .page-disclaimer .toc-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* 断点：宽屏条款正文双栏 */
@media (min-width: 1100px) {
  .page-disclaimer .clause-body {
    max-width: none;
    column-count: 2;
    column-gap: clamp(30px, 4vw, 56px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .toc-list a,
  .page-disclaimer .clause-copy,
  .page-disclaimer .to-top {
    transition: none;
  }
}