代码在这里了，纯css3,用动画实现
body {
background-color: #151515;
}
.super-input input {
background: #222;
background: -webkit-linear-gradient(#333, #222);
background: -moz-linear-gradient(#333, #222);
background: -o-linear-gradient(#333, #222);
background: -ms-linear-gradient(#333, #222);
background: linear-gradient(#333, #222);
border: 1px solid #444;
border-radius: 5px 0 0 5px;
box-shadow: 0 2px 0 #000;
color: #888;
display: block;
float: left;
font-family: 'Cabin', helvetica, arial, sans-serif;
font-size: 13px;
font-weight: 400;
height: 40px;
margin: 0;
padding: 0 10px;
text-shadow: 0 -1px 0 #000;
width: 200px;
}
/*这里是重点*/
.super-input input:focus {
-webkit-animation: glow 800ms ease-out infinite alternate;
-moz-animation: glow 800ms ease-out infinite alternate;
-o-animation: glow 800ms ease-out infinite alternate;
-ms-animation: glow 800ms ease-out infinite alternate;
/*这里使用了呼吸动画*/
animation: glow 800ms ease-out infinite alternate;
background: #222922;
background: -webkit-linear-gradient(#333933, #222922);
background: -moz-linear-gradient(#333933, #222922);
background: -o-linear-gradient(#333933, #222922);
background: -ms-linear-gradient(#333933, #222922);
background: linear-gradient(#333933, #222922);
border-color: #393;
box-shadow: 0 0 5px rgba(0,255,0,.2), inset 0 0 5px rgba(0,255,0,.1), 0 2px 0 #000;
color: #efe;
outline: none;
}
/*以下定义动画帧*/
@-webkit-keyframes glow {
0% {
border-color: #393;
box-shadow: 0 0 5px rgba(0,255,0,.2), inset 0 0 5px rgba(0,255,0,.1), 0 2px 0 #000;
}
100% {
border-color: #6f6;
box-shadow: 0 0 20px rgba(0,255,0,.6), inset 0 0 10px rgba(0,255,0,.4), 0 2px 0 #000;
}
}
@-moz-keyframes glow {
0% {
border-color: #393;
box-shadow: 0 0 5px rgba(0,255,0,.2), inset 0 0 5px rgba(0,255,0,.1), 0 2px 0 #000;
}
100% {
border-color: #6f6;
box-shadow: 0 0 20px rgba(0,255,0,.6), inset 0 0 10px rgba(0,255,0,.4), 0 2px 0 #000;
}
}
@-o-keyframes glow {
0% {
border-color: #393;
box-shadow: 0 0 5px rgba(0,255,0,.2), inset 0 0 5px rgba(0,255,0,.1), 0 2px 0 #000;
}
100% {
border-color: #6f6;
box-shadow: 0 0 20px rgba(0,255,0,.6), inset 0 0 10px rgba(0,255,0,.4), 0 2px 0 #000;
}
}
@-ms-keyframes glow {
0% {
border-color: #393;
box-shadow: 0 0 5px rgba(0,255,0,.2), inset 0 0 5px rgba(0,255,0,.1), 0 2px 0 #000;
}
100% {
border-color: #6f6;
box-shadow: 0 0 20px rgba(0,255,0,.6), inset 0 0 10px rgba(0,255,0,.4), 0 2px 0 #000;
}
}
@keyframes glow {
0% {
border-color: #393;
box-shadow: 0 0 5px rgba(0,255,0,.2), inset 0 0 5px rgba(0,255,0,.1), 0 2px 0 #000;
}
100% {
border-color: #6f6;
box-shadow: 0 0 20px rgba(0,255,0,.6), inset 0 0 10px rgba(0,255,0,.4), 0 2px 0 #000;
}
}
