*{margin:0;padding:0;box-sizing:border-box;}
:root{
  /* Background */
  --bg:#F9FAFB;--sidebar-bg:#FFFFFF;--card:#FFFFFF;--border:#E5E7EB;--border-light:#EAECF0;
  /* Text */
  --text:#1F2937;--text2:#6B7280;--text3:#9CA3AF;
  /* Primary (蓝紫主色调) */
  --primary:#3556D8;--primary-light:#EEF1FF;--primary-hover:#2C47B8;--primary-100:#E0E7FF;
  /* Status */
  --success:#10B981;--success-bg:#ECFDF5;
  --warning:#F59E0B;--warning-bg:#FEF7E6;
  --danger:#EF4444;--danger-bg:#FEF2F2;
  /* Extra */
  --blue:#3B82F6;--blue-bg:#EFF6FF;
  --purple:#8B5CF6;--purple-bg:#F5F3FF;
  --orange:#F97316;--orange-bg:#FFF7ED;
  --cyan:#06B6D4;--cyan-bg:#ECFEFF;
  /* Layout */
  --radius:8px;--radius-sm:6px;--radius-lg:12px;
  --shadow:0 1px 3px rgba(0,0,0,.04);--shadow-md:0 4px 12px rgba(0,0,0,.06);
}
body{font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;background:var(--bg);color:var(--text);font-size:13.5px;line-height:1.55;}
button,input,select,textarea{font:inherit;color:inherit;}
a{color:var(--primary);text-decoration:none;}
a:hover{text-decoration:underline;}
::-webkit-scrollbar{width:6px;height:6px;}
::-webkit-scrollbar-track{background:transparent;}
::-webkit-scrollbar-thumb{background:#d1d5db;border-radius:10px;}
::-webkit-scrollbar-thumb:hover{background:var(--text3);}