:root {
  --bg: #f7f8fa;
  --surface: #fff;
  --text: #1a1a1a;
  --text-secondary: #666;
  --text-tertiary: #999;
  --border: #e5e7eb;
  --border-light: #f0f1f3;
  --accent: #2563eb;
  --accent-soft: #eff6ff;
  --accent-hover: #1d4ed8;
  --purple: #7c3aed;
  --purple-soft: #f5f3ff;
  --green: #16a34a;
  --green-soft: #f0fdf4;
  --orange: #ea580c;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow-md: 0 4px 16px rgba(0,0,0,0.07);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --header-h: 52px;
  --max: 1180px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body { font-family: var(--font); background: var(--bg); color: var(--text); font-size: 14px; line-height: 1.6; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }

.wrap { width: min(var(--max), 94vw); margin: 0 auto; }

.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.95); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.header-row {
  min-height: var(--header-h);
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 8px 0;
}

.breadcrumb { font-size: 12px; color: var(--text-tertiary); margin-bottom: 12px; }
.breadcrumb a { color: var(--text-tertiary); text-decoration: none; }

.footer { border-top: 1px solid var(--border); padding: 20px 0; font-size: 12px; color: var(--text-tertiary); background: var(--surface); margin-top: 20px; }
.footer-inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }