:root {
  color-scheme: light;
  --bg: #f7f8fa;
  --surface: #ffffff;
  --ink: #151923;
  --muted: #596273;
  --line: #e2e5ea;
  --control-border: #7a8290;
  --action: #171c27;
  --action-hover: #2a3240;
  --action-text: #ffffff;
  --focus-ring: #475569;
  --selected-bg: #eceef1;
  --font-ui:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", sans-serif;
}