转载自：http://www.fly63.com/article/detial/616

文字闪烁效果一：

通过改变透明度来实现文字的渐变闪烁，效果如下：

文字带渐变效果的闪烁：

<div class="main">
	文字闪烁：<span class="blink">闪烁效果</span>
</div>

<style type="text/css">
.main{
  color: #666;margin-top: 50px;
}
/* 定义keyframe动画，命名为blink */
@keyframes blink{
  0%{opacity: 1;}
  100%{opacity: 0;} 
}
/* 添加兼容性前缀 */
@-webkit-keyframes blink {
    0% { opacity: 1; }
    100% { opacity: 0; }
}
@-moz-keyframes blink {
    0% { opacity: 1; }
    100% { opacity: 0; }
}
@-ms-keyframes blink {
    0% {opacity: 1; } 
    100% { opacity: 0;}
}
@-o-keyframes blink {
    0% { opacity: 1; }
    100% { opacity: 0; }
}
/* 定义blink类*/
.blink{
    color: #dd4814;
    animation: blink 1s linear infinite;  
    /* 其它浏览器兼容性前缀 */
    -webkit-animation: blink 1s linear infinite;
    -moz-animation: blink 1s linear infinite;
    -ms-animation: blink 1s linear infinite;
    -o-animation: blink 1s linear infinite;
}
</style>

如果不需要渐变闪烁效果，我们可以在keyframe动画中定义50%，50.1%的opacity的值。如下：

@-webkit-keyframes blink {
    0% { opacity: 1; }
    50% { opacity: 1; }
    50.01% { opacity: 0; }
    100% { opacity: 0; }
}

这样的效果：

文字不渐变闪烁：闪烁效果

文字闪烁效果二：

通过设置text-shadow的值，来实现文字阴影闪烁的效果，效果如下：

闪烁效果

代码如下：

<div class="box">闪烁效果</div>

<style>  
    .box{ 
    	font-size: 20px; 
    	color:#4cc134; 
    	margin: 10px;
    	animation: changeshadow 1s  ease-in  infinite ;
    	/* 其它浏览器兼容性前缀 */
	    -webkit-animation: changeshadow 1s linear infinite;
	    -moz-animation: changeshadow 1s linear infinite;
	    -ms-animation: changeshadow 1s linear infinite;
	    -o-animation: changeshadow 1s linear infinite;
    }  
    @keyframes changeshadow {  
        0%{ text-shadow: 0 0 4px #4cc134}  
        50%{ text-shadow: 0 0 40px #4cc134}  
        100%{ text-shadow: 0 0 4px #4cc134}  
    }
    /* 添加兼容性前缀 */
	@-webkit-keyframes changeshadow {
	  0%{ text-shadow: 0 0 4px #4cc134}  
          50%{ text-shadow: 0 0 40px #4cc134}  
          100%{ text-shadow: 0 0 4px #4cc134}  
	}
	@-moz-keyframes changeshadow {
	    0%{ text-shadow: 0 0 4px #4cc134}  
            50%{ text-shadow: 0 0 40px #4cc134}  
            100%{ text-shadow: 0 0 4px #4cc134}  
	}
	@-ms-keyframes changeshadow {
	    0%{ text-shadow: 0 0 4px #4cc134}  
            50%{ text-shadow: 0 0 40px #4cc134}  
            100%{ text-shadow: 0 0 4px #4cc134}  
	}
	@-o-keyframes changeshadow {
	    0%{ text-shadow: 0 0 4px #4cc134}  
            50%{ text-shadow: 0 0 40px #4cc134}  
            100%{ text-shadow: 0 0 4px #4cc134}  
	}
</style> 

文字闪烁效果三：

利用背景图片或者背景渐变，实现文字颜色的闪烁效果，效果如下：

闪烁效果

代码如下：

<span class="box">闪烁效果</span>

<style>  
    .box{ 
    	display: inline-block;
    	font-size: 20px;
    	margin: 10px;
    	background: linear-gradient(left, #f71605, #e0f513); 
        background: -webkit-linear-gradient(left, #f71605, #e0f513);
        background: -o-linear-gradient(right, #f71605, #e0f513);
		-webkit-background-clip: text;
		-webkit-text-fill-color: transparent;
		animation:scratchy 0.253s linear forwards infinite;
		/* 其它浏览器兼容性前缀 */
	    -webkit-animation:scratchy 0.253s linear forwards infinite;
	    -moz-animation: scratchy 0.253s linear forwards infinite;
	    -ms-animation: scratchy 0.253s linear forwards infinite;
	    -o-animation: scratchy 0.253s linear forwards infinite;
    }  
   @keyframes  scratchy {
		0% {
			background-position: 0 0;
		}
		25% {
			background-position: 0 0;
		}
		26% {
			background-position: 20px -20px;
		}
		50% {
			background-position: 20px -20px;
		}
		51% {
			background-position: 40px -40px;
		}
		75% {
			background-position: 40px -40px;
		}
		76% {
			background-position: 60px -60px;
		}
		99% {
			background-position: 60px -60px;
		}
		100% {
			background-position: 0 0;
		}
	}
	/* 添加兼容性前缀 */
	@-webkit-keyframes scratchy {
	    0% {
			background-position: 0 0;
		}
		25% {
			background-position: 0 0;
		}
		26% {
			background-position: 20px -20px;
		}
		50% {
			background-position: 20px -20px;
		}
		51% {
			background-position: 40px -40px;
		}
		75% {
			background-position: 40px -40px;
		}
		76% {
			background-position: 60px -60px;
		}
		99% {
			background-position: 60px -60px;
		}
		100% {
			background-position: 0 0;
		}
	}
	@-moz-keyframes scratchy {
	    0% {
			background-position: 0 0;
		}
		25% {
			background-position: 0 0;
		}
		26% {
			background-position: 20px -20px;
		}
		50% {
			background-position: 20px -20px;
		}
		51% {
			background-position: 40px -40px;
		}
		75% {
			background-position: 40px -40px;
		}
		76% {
			background-position: 60px -60px;
		}
		99% {
			background-position: 60px -60px;
		}
		100% {
			background-position: 0 0;
		}
	}
	@-ms-keyframes scratchy {
	   0% {
			background-position: 0 0;
		}
		25% {
			background-position: 0 0;
		}
		26% {
			background-position: 20px -20px;
		}
		50% {
			background-position: 20px -20px;
		}
		51% {
			background-position: 40px -40px;
		}
		75% {
			background-position: 40px -40px;
		}
		76% {
			background-position: 60px -60px;
		}
		99% {
			background-position: 60px -60px;
		}
		100% {
			background-position: 0 0;
		}
	}
	@-o-keyframes scratchy {
	   0% {
			background-position: 0 0;
		}
		25% {
			background-position: 0 0;
		}
		26% {
			background-position: 20px -20px;
		}
		50% {
			background-position: 20px -20px;
		}
		51% {
			background-position: 40px -40px;
		}
		75% {
			background-position: 40px -40px;
		}
		76% {
			background-position: 60px -60px;
		}
		99% {
			background-position: 60px -60px;
		}
		100% {
			background-position: 0 0;
		}
	}
</style>