霓虹闪烁
不规则亮度跳变，模拟老式霓虹灯管。
效果预览
参数调节
完整代码
/* 霓虹闪烁 */
@keyframes neonFlicker {
0%, 19%, 21%, 55%, 57%, 100% { opacity: 1; box-shadow: 0 0 12px rgba(56,189,248,.8); }
20%, 56% { opacity: .45; box-shadow: 0 0 3px rgba(56,189,248,.3); }
}
.neon-flicker { animation: neonFlicker 2.6s linear infinite; }