:root {
  color-scheme: dark;
  --bg: #0a0f16;
  --bg-soft: #0f1620;
  --surface: rgba(17, 25, 36, 0.96);
  --surface-strong: #151e2a;
  --surface-hover: #1a2532;
  --surface-subtle: rgba(15, 22, 32, 0.72);
  --border: rgba(166, 180, 198, 0.16);
  --border-strong: rgba(166, 180, 198, 0.3);
  --text: #f3f6f9;
  --text-muted: #aab4c2;
  --text-soft: #d2d9e2;
  --up: #ef5b5b;
  --down: #2fc47c;
  --flat: #aab4c2;
  --accent: #4b8cf7;
  --accent-strong: #78a9ff;
  --warning: #f2b84b;
  --danger: #ffb3b3;
  --danger-bg: rgba(239, 91, 91, 0.1);
  --shadow-lg: 0 20px 54px rgba(4, 10, 18, 0.34);
  --shadow-sm: 0 10px 28px rgba(4, 10, 18, 0.2);
  --radius: 8px;
  --radius-sm: 6px;
  --transition: 160ms cubic-bezier(0.2, 0, 0, 1);
  --focus-ring: 0 0 0 3px rgba(75, 140, 247, 0.24);
  --font-main: system-ui, -apple-system, BlinkMacSystemFont, "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
}