:root{--primary:#1a73e8;--primary-dark:#1557b0;--primary-light:#e8f0fe;--success:#0d9488;--warning:#f59e0b;--danger:#ef4444;--bg:#f5f7fa;--card-bg:#fff;--text:#1f2937;--text-secondary:#6b7280;--border:#e5e7eb;--sidebar-bg:#1e293b;--sidebar-text:#cbd5e1;--sidebar-active:#3b82f6;--radius:8px;--shadow:0 1px 3px #0000001a, 0 1px 2px #0000000f;--shadow-lg:0 4px 6px #0000001a, 0 2px 4px #0000000f}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;line-height:1.6}a{color:var(--primary);text-decoration:none}button{cursor:pointer;border-radius:var(--radius);border:none;padding:8px 16px;font-family:inherit;font-size:14px;transition:all 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