:root{--bg:#f6f7f9;--panel:#fff;--line:#e3e6ea;--fg:#1a1d24;--muted:#6b7280;--accent:#2563eb;--ok:#16a34a;--err:#dc2626}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--fg);font:15px/1.65 -apple-system,PingFang SC,HarmonyOS Sans,Segoe UI,Roboto,sans-serif}button,textarea,select{font:inherit;color:inherit}header{position:sticky;top:0;z-index:10;display:flex;gap:12px;align-items:center;flex-wrap:wrap;padding:14px 24px;background:var(--panel);border-bottom:1px solid var(--line)}header .logo{width:30px;height:30px;border-radius:8px;flex-shrink:0;background:linear-gradient(135deg,#2563eb,#7c3aed);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:13px}header h1{font-size:16px;font-weight:650}header .sub{color:var(--muted);font-size:12px}header .conn{margin-left:auto;display:flex;align-items:center;gap:8px;font-size:12px;color:var(--muted)}header .conn 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