:root {
  --ink: #182936;
  --ink-soft: #56616d;
  --muted: #626d78;
  --metal-start: #1a81b2;
  --metal-mid: #24b8da;
  --metal-end: #1aa4c4;
  --brand-gradient: linear-gradient(135deg, var(--metal-start) 0%, var(--metal-mid) 48%, var(--metal-end) 100%);
  --brand: var(--metal-start);
  --brand-hover: var(--metal-end);
  --brand-ink: #136785;
  --on-brand: #041c28;
  --accent: var(--metal-mid);
  --paper: #fff;
  --soft: #f5f6f8;
  --mist: #eefafc;
  --line: #e2e6eb;
  --dark: #102332;
  --error: #a52525;
  --font: Inter, -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'PingFang TC', 'Microsoft YaHei', 'Noto Sans CJK SC', 'Noto Sans CJK TC', sans-serif;
  --container: 1400px;
  --header-h: 80px;
  --radius: 6px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --ease: 180ms ease;
  --ease-spring: cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-sm: 0 2px 8px rgba(15, 40, 60, 0.05);
  --shadow-md: 0 8px 24px -4px rgba(15, 40, 60, 0.08);
  --shadow-lg: 0 16px 36px -6px rgba(15, 40, 60, 0.12);
  --shadow-hover: 0 20px 40px -8px rgba(0, 119, 173, 0.16);
}
@media (max-width: 760px) { :root { --header-h: 68px; } }

html[lang="zh-Hant"] { --font: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "Microsoft JhengHei", "Noto Sans CJK TC", sans-serif; }