css文字效果，文字颜色有光影流动

.sq_start { position: absolute; bottom: 10%; left: 50%; z-index: 3; margin-left: -50px; width: 100px; height: 20px; font-size: 18px; background: -webkit-gradient(linear,left top,right top,color-stop(0, #549A66),color-stop(0.3, #3CAF5A),color-stop(0.5, white),color-stop(0.7, #3CAF5A),color-stop(1, #3CAF5A)); background-clip: text; -webkit-background-clip: text; -webkit-text-fill-color: transparent; text-fill-color: transparent; -webkit-animation: slidetounlock 4s linearinfinite; animation: slidetounlock 4s linear infinite; }