CSS3字体火焰燃烧效果

// fire
@keyframes fireDiv {
  0% {
    text-shadow: 0 0 4px white, 0 -5px 4px #ff3, 2px -10px 6px #fd3,
      -2px -15px 11px #f80, 2px -25px 18px #f20;
  }
  25% {
    text-shadow: 0 0 4px white, 2px -7px 6px #ff3, 2px -12px 8px #fd3,
      -3px -20px 11px #f80, 4px -30px 22px #f20;
  }
  50% {
    text-shadow: 0 0 4px white, 2px -10px 8px #ff3, 2px -14px 10px #fd3,
      -4px -25px 11px #f80, 4px -35px 25px #f20;
  }
  75% {
    text-shadow: 0 0 4px white, 2px -7px 6px #ff3, 2px -12px 8px #fd3,
      -3px -20px 11px #f80, 4px -30px 22px #f20;
  }
  100% {
    text-shadow: 0 0 4px white, 0 -5px 4px #ff3, 2px -10px 6px #fd3,
      -2px -15px 11px #f80, 2px -25px 18px #f20;
  }
}