:root{
  --font-title:"Microsoft YaHei","微软雅黑","PingFang SC",-apple-system,sans-serif;
  --font-body:"PingFang SC","苹方-简","Microsoft YaHei","微软雅黑",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --font-mono:"Fira Code","Consolas","Menlo","Monaco","Courier New",monospace;

  --radius-sm:8px;
  --radius-md:12px;
  --radius-lg:16px;

  --bg:#f9f9f9;
  --panel:#ffffff;
  --sidebar:#f3f3f3;
  --border:#e5e5e5;
  --border-strong:#d4d4d4;

  --text:#1f1f1f;
  --text-secondary:#6b6b6b;
  --text-muted:#9b9b9b;

  --hover:#f0f0f0;
  --hover-strong:#e8e8e8;
  --conv-active:#e0e0e0;
  --conv-more-bg:#ededed;

  --user-bubble:#1f1f1f;
  --user-bubble-text:#f5f5f5;

  --success:#22c55e;
  --danger:#ef4444;
  --code-bg:#f7f7f7;
}