#zx-app{background:var(--bg);min-height:100vh}:root{--primary:#6366f1;--primary-light:#818cf8;--secondary:#8b5cf6;--accent:#06b6d4;--bg:#f0f4ff;--card:#fff;--text:#1e293b;--text-muted:#64748b;--border:#e2e8f0;--success:#10b981;--warning:#f59e0b;--danger:#ef4444;--radius:16px;--shadow:0 4px 24px #6366f114;--shadow-hover:0 8px 32px #6366f126}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;font-family:Noto Sans SC,-apple-system,sans-serif}.btn-back{border:2px solid var(--primary-light);color:var(--primary);cursor:pointer;background:#fff;border-radius:50px;align-items:center;gap:6px;padding:8px 16px;font-size:14px;font-weight:600;transition:all .2s;display:inline-flex}.btn-back:hover{background:var(--primary);color:#fff;border-color:var(--primary)}.empty{text-align:center;color:var(--text-muted);padding:80px 20px}.empty:before{content:"📭";margin-bottom:16px;font-size:48px;display:block}