/* 后台公共样式 */
:root { --primary: #4472C4; --primary-dark: #2a56a0; --success: #70AD47; --danger: #e74c3c; --warning: #f39c12; }
.hidden { display: none !important; }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes fadeInDown { from { opacity: 0; transform: translateX(-50%) translateY(-20px); } to { opacity: 1; transform: translateX(-50%) translateY(0); } }
body { background: #f0f4f8; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif; }