/* 昨日回响 · 静态页共用样式 */
:root {
  --gold: #f5a623;
  --gold-dark: #d4880c;
  --bg: #fafafa;
  --card: #ffffff;
  --text: #1a1a1a;
  --muted: #666;
  --border: #e8e8e8;
  --max: 720px;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
}

a { color: var(--gold-dark); }
a:hover { color: var(--gold); }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 16px 24px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
  text-decoration: none;
}

.site-header nav {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.site-header nav a {
  text-decoration: none;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-header nav a[aria-current="page"] {
  color: var(--gold-dark);
  font-weight: 600;
}

.doc, .hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: 32px 24px 48px;
}

.hero {
  text-align: center;
  padding-top: 48px;
}

.hero h1 {
  font-size: 2rem;
  margin-bottom: 8px;
}

.hero p.lead {
  color: var(--muted);
  font-size: 1.05rem;
}

.hero .cta {
  display: inline-block;
  margin-top: 24px;
  padding: 12px 24px;
  background: var(--gold);
  color: #fff;
  text-decoration: none;
  border-radius: 12px;
  font-weight: 600;
}

.card-grid {
  display: grid;
  gap: 16px;
  margin-top: 32px;
  text-align: left;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
}

.card h2 {
  margin: 0 0 8px;
  font-size: 1.1rem;
}

.card p { margin: 0; color: var(--muted); }

.doc h1 {
  font-size: 1.75rem;
  margin-bottom: 4px;
}

.doc .meta {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 32px;
}

.doc section {
  margin-bottom: 32px;
}

.doc h2 {
  font-size: 1.25rem;
  margin: 0 0 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--gold);
}

.doc h3 {
  font-size: 1.05rem;
  margin: 20px 0 8px;
}

.doc p, .doc li { color: #333; }

.doc ul, .doc ol {
  padding-left: 1.25rem;
}

.site-footer {
  text-align: center;
  padding: 24px;
  color: var(--muted);
  font-size: 0.875rem;
  border-top: 1px solid var(--border);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111;
    --card: #1c1c1e;
    --text: #f2f2f7;
    --muted: #98989d;
    --border: #38383a;
  }
  .doc p, .doc li { color: #d1d1d6; }
  .brand { color: var(--text); }
}