给文字加上管灯闪烁、发光霓虹灯特效，HTML/Vue代码在线实时编辑、预览

            
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            * {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}
html {
  font-family: "Nunito";
}
body {
  background-color: #09111b;
}
:root {
  --var-color: rgb(0, 238, 255);
}
section {
  height: 100vh;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #09111b;
}
.container h1 {
  font-size: 20vw;
  color: var(--var-color);
  position: relative;
}
.container h1::before {
  position: absolute;
  content: attr(data-text);
  text-shadow: 0px 0px 20px var(--var-color);
  filter: blur(10px) brightness(0);
  animation: flicker 4s linear forwards;
  /* animation-delay: 2s; */
  animation-iteration-count: infinite;

}
@keyframes flicker {
  0% {
    filter: blur(10px) brightness(0);
  }
  29% {
    filter: blur(10px) brightness(0);
  }
  30% {
    filter: blur(5px) brightness(1);
  }
  32% {
    filter: blur(5px) brightness(0);
  }
  33% {
    filter: blur(5px) brightness(0);
  }
  35% {
    filter: blur(5px) brightness(1);
  }
  37% {
    filter: blur(5px) brightness(0);
  }
  38% {
    filter: blur(5px) brightness(1);
  }
  39% {
    filter: blur(5px) brightness(0);
  }
  40% {
    filter: blur(5px) brightness(1);
  }
  48% {
    filter: blur(5px) brightness(1);
  }
  59% {
    filter: blur(5px) brightness(0);
  }
  70% {
    filter: blur(5px) brightness(1);
  }
  100% {
    filter: blur(5px) brightness(1);
  }
}