:root{--bg:#070b16;--panel:#0d1426;--panel2:#111b31;--line:rgba(164,191,241,.16);--text:#eff5ff;--muted:#96a4bf;--blue:#56a9ff;--cyan:#55e6ff;--red:#ff6f78;--gold:#ffcd62;--shadow:0 22px 60px rgba(0,0,0,.35)}*{box-sizing:border-box}html,body{margin:0;min-height:100%;background:radial-gradient(circle at 80% -20%,#1a3764 0,transparent 38%),linear-gradient(135deg,#060914,#0a1020 48%,#080b15);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI","Microsoft YaHei",sans-serif}body{overflow-x:hidden}.app-shell{max-width:1380px;margin:0 auto;padding:22px 30px 40px}.topbar{height:44px;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:11px}.brand-mark{display:grid;place-items:center;width:32px;height:32px;border:1px solid rgba(94,205,255,.45);border-radius:10px;color:var(--cyan);font-size:17px;box-shadow:0 0 18px rgba(60,203,255,.18)}.brand strong{font-size:14px;letter-spacing:.12em}.brand 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