忘记在哪里看到的这个效果，当时就被这个体验给吸引了，卖的一手好萌啊。如果你也想让你的网站用户体验下可以试试哦。
DEMO： http://jsfiddle.net/gothic/m2wrdptL/4/
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>login form</title>
<style>
.mod {
position: relative;
padding: 50px;
}
.login-form {
position: relative;
width: 300px;
padding-top: 25px;
margin: 100px auto;
}
.login-form input {
width: 300px;
height: 40px;
margin-bottom: 10px;
border-radius: 4px;
border: 1px solid #ccc;
text-indent: 10px;
}
.avatar {
width: 100%;
/*background-color: #FFF;*/
position: absolute;
top: -100px;
-webkit-user-select: none; /* 1 */
-moz-user-select: none; /* 1 */
-ms-user-select: none; /* 1 */
-o-user-select: none; /* 1 */
user-select: none; /* 1 */
}
/* 头*/
.cabeca {
background-color: #E35C49;
height: 100px;
width: 130px;
margin: 0 auto;
border-radius: 50% 50% 0 0;
position: relative;
}
.orelha, .olhos, .narinas, .dentes { position: absolute; }
/* 耳朵 */
.orelha {
width: 35px;
height: 35px;
border-radius: 50%;
background-color: #E25441;
top: 0;
/* z-index: -1;*/
transform: translateY(-25%);
}
.orelha-esq {
left: 10px;
box-shadow: inset 3px 5px 0 #E35C49;
}
.orelha-dir {
right: 10px;
box-shadow: inset -3px 5px 0 #E35C49;
}
/* 眼睛*/
.olhos {
width: 35px;
height: 35px;
background-color: #FFF;
border-radius: 50%;
top: 30px;
overflow: hidden;
box-shadow: inset 0 1px 2px rgba(0,0,0,0.8);
transition: all 0.05s ease;
}
.olhos .palpebra {
background-color: #E25441;
position: absolute;
width: 100%;
z-index: 2;
border-radius: 50%;
-webkit-animation: piscar 1.5s linear infinite alternate;
animation: piscar 1.5s linear infinite alternate;
}
/* 眨眼动画 */
@-webkit-keyframes piscar {
0% { height: 0; }
95% { height: 0; }
100% { height: 100%; }
}
@keyframes piscar {
0% { height: 0; }
95% { height: 0; }
100% { height: 100%; }
}
/* 手臂动画 */
.olhos.fechar .palpebra {
-webkit-animation: paused; /*1*/
animation: paused; /*1*/
}
.olho-esq { left: 25px; }
.olho-dir { right: 25px; }
.olhos::before,
.olhos::after {
content: " ";
display: block;
position: absolute;
border-radius: 50%;
z-index: 1;
}
.olhos::before {
bottom: 1px;
background-color: #000;
width: 10px;
height: 10px;
left: 50%;
transform: translateX(-50%);
}
.olhos::after {
width: 5px;
height: 5px;
background-color: #FFF;
bottom: 7px;
left: 18px;
}
/* 鼻子 */
.narinas {
width: 10px;
height: 10px;
background-color: rgba(255,255,255,0.2);
border-radius: 50%;
box-shadow: inset 0 2px 2px rgba(0,0,0,0.3);
top: 70px;
}
.narina-esq { left: 50px; }
.narina-dir { right: 50px; }
/* 牙齿 */
.dentes {
width: 25px;
height: 20px;
background-color: #EAEAEA;
border-radius: 0 0 3px 3px;
bottom: -20px;
}
.dente-esq { left: 30px; }
.dente-dir { right: 30px; }
/* 手臂 */
.bracos {
position: absolute;
right: 0;
bottom: 0;
left: 0;
}
.bracos .mao {
width: 50px;
height: 40px;
border-radius: 50%;
background-color: #E25441;
position: absolute;
bottom: 0;
overflow: hidden;
z-index: 5;
box-shadow: 0 2px 0 rgba(0,0,0,0.2), inset 0 2px 0 rgba(0,0,0,0.1);
transform: translateY(50%);
transition: all 0.3s ease-out;
}
.bracos .mao-esq { left: 30px; }
.bracos .mao-dir { right: 30px; }
.mao .unha {
background-color: rgba(255,255,255,0.2);
width: 10px;
height: 10px;
border-radius: 50% 50% 0 0;
position: absolute;
bottom: 0;
left: 10px;
box-shadow: 20px 0 0 rgba(255,255,255,0.2);
}
/* 遮眼 */
.esconder .mao {
height: 75px;
bottom: 30px;
box-shadow: 0 0 0 rgba(0,0,0,0), inset 0 2px 0 rgba(0,0,0,0.1);
}
.esconder .mao-esq {
left: 90px;
transform: translateY(50%) rotate(-125deg);
}
.esconder .mao-dir {
right: 90px;
transform: translateY(50%) rotate(125deg);
}
</style>
</head>
<body>
<div class="mod">
<form action="" id="login_form" class="login-form">
<input type="email" placeholder="邮箱" >
<input type="password" id="password" placeholder="密码">
</form>
</div>
<script>
var template = [
'<div class="avatar">',
' <div class="cabeca">',
' <div class="orelha-esq orelha"></div>',
' <div class="orelha-dir orelha"></div>',
' <div class="olho-esq olhos">',
' <div class="palpebra"></div>',
' </div>',
' <div class="olho-dir olhos">',
' <div class="palpebra"></div>',
' </div>',
' <div class="narina-esq narinas"></div>',
' <div class="narina-dir narinas"></div>',
' <div class="dente-esq dentes"></div>',
' <div class="dente-dir dentes"></div>',
' </div>',
' <div class="bracos" id="bracos">',
' <div class="mao-esq mao">',
' <div class="unha"></div>',
' </div>',
' <div class="mao-dir mao">',
' <div class="unha"></div>',
' </div>',
' </div>',
'</div>'
].join("");
var isIE9_ = document.all && !window.atob; //判断 IE9- 浏览器
if (!isIE9_) {
$("#login_form").prepend(template);
$("#password").on({
"focus": function() {
$("#bracos").addClass("esconder");
$(".olhos").addClass("fechar");
},
"focusout": function() {
$("#bracos").removeClass("esconder");
$(".olhos").removeClass("fechar");
}
})
}
</script>
</body>
</html>