/* 主题：tech 科技蓝（默认） - 工业 / 科技 / 教育 / 直辖市 */
:root {
  --primary: #0066CC;
  --primary-dark: #004999;
  --primary-soft: rgba(0,102,204,0.1);
  --accent: #00D4FF;
  --text: #0E1A2B;
  --text-mute: #5B6477;
  --bg: #f4f6fb;
  --bg-alt: #eef2f9;
  --header-bg: rgba(255,255,255,0.92);
  --border: rgba(0,0,0,0.08);
  --hero-bg: linear-gradient(135deg, #0a1f3d 0%, #0a3060 60%, #003a73 100%);
  --hero-text: #fff;
  --hero-title: #fff;
  --hero-pattern:
    linear-gradient(rgba(0,212,255,0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,0.08) 1px, transparent 1px);
  --chip-bg: rgba(0,212,255,0.1);
  --chip-border: rgba(0,212,255,0.3);
  --chip-text: #cce8ff;
  --meta-border: rgba(0,212,255,0.25);
  --strip-bg: linear-gradient(135deg, #0a1f3d 0%, #0066CC 100%);
  --strip-deco: linear-gradient(90deg, #0066CC, #00D4FF, #0066CC);
  --card-bg: #fff;
  --input-bg: #f7f8fb;
  --footer-bg: #0a1428;
  --footer-pattern:
    linear-gradient(rgba(0,212,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,0.04) 1px, transparent 1px);
}