:root {
  color-scheme: light dark;
  --text: #1a1a1a;
  --muted: #555;
  --bg: #fafafa;
  --card: #fff;
  --border: #e5e5e5;
  --link: #2563eb;
  --accent: #111;
}
@media (prefers-color-scheme: dark) {
  :root {
    --text: #f0f0f0;
    --muted: #aaa;
    --bg: #111;
    --card: #1a1a1a;
    --border: #333;
    --link: #60a5fa;
    --accent: #fff;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
}
.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 20px 64px;
}
header {
  margin-bottom: 28px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}
header h1 {
  margin: 0 0 4px;
  font-size: 1.5rem;
  font-weight: 700;
}
header .sub {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}
nav.top {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 18px;
  margin: 16px 0 0;
  font-size: 0.9rem;
}
nav.top a { color: var(--link); text-decoration: none; }
nav.top a:hover { text-decoration: underline; }
.lang-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}
.lang-bar button {
  padding: 6px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  text-decoration: none;
  font-size: 0.875rem;
  cursor: pointer;
}
.lang-bar button:hover,
.lang-bar button.active {
  border-color: var(--link);
  color: var(--link);
}
.doc {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px 24px;
  margin-bottom: 32px;
}
.doc h2 {
  margin: 1.75em 0 0.5em;
  font-size: 1.05rem;
  font-weight: 600;
}
.doc h2:first-child { margin-top: 0; }
.doc p { margin: 0.75em 0; }
.doc ul { margin: 0.5em 0 0.75em; padding-left: 1.25em; }
.doc li { margin: 0.35em 0; }
.doc .effective { color: var(--muted); font-size: 0.9rem; margin-bottom: 1.25em; }
.doc .caps {
  font-size: 0.92rem;
  letter-spacing: 0.01em;
}
.doc a { color: var(--link); word-break: break-all; }
.legal-text {
  margin: 0;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font: inherit;
  color: inherit;
}
.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 40px 0;
}
footer {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--muted);
}
footer a { color: var(--link); }
.index-card {
  display: block;
  padding: 18px 20px;
  margin-bottom: 12px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  text-decoration: none;
  color: var(--text);
}
.index-card:hover { border-color: var(--link); }
.index-card strong { display: block; font-size: 1.05rem; margin-bottom: 4px; }
.index-card span { color: var(--muted); font-size: 0.9rem; }