.demo-bar{background: #b71c1c;color: #fff;text-align: center;font: 600 13px/1.4 system-ui,sans-serif;padding: 6px 12px;position: sticky;top: 0;z-index: 10000}.demo-hint{margin-top: 12px;padding: 10px 12px;border: 1px dashed #b71c1c;border-radius: 6px;font-size: 13px}.demo-watermark{display: none}@media print{.demo-bar{position: static}.demo-watermark{display: block;position: fixed;top: 50%;left: 50%;transform: translate(-50%,-50%) rotate(-35deg);font: 800 90pt/1 system-ui,sans-serif;color: rgba(200,0,0,.18);white-space: nowrap;z-index: 9999;pointer-events: none}}