带图标提示的分步式输入框【原创】

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页面的head部分，需远程调用图标字体库font-awesome，并设置好页面元素的样式，代码如下：

<link rel='stylesheet prefetch' href='https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.4.0/css/font-awesome.min.css'>
<style type="text/css">
*, *:before, *:after {
  box-sizing: border-box;
  transition: .5s ease-in-out;
}

body, html {
  font-family: 'Microsoft YaHei','Lantinghei SC','Open Sans',Arial,'Hiragino Sans GB','STHeiti','WenQuanYi Micro Hei','SimSun',sans-serif;
  font-weight: 200;
  position: relative;
  height: 100%;
}

h1 {
  font-size: 30px;
  line-height: 30px;
  font-weight: 200;
  padding: 75px 0 50px 0;
  text-align: center;
}
h1 .subtext {
  opacity: .3;
}

.newsletter {
  max-width: 400px;
  margin: 50px auto;
  position: relative;
}
.newsletter > span.container {
  display: block;
  width: 100%;
  position: absolute;
  z-index: 1;
  top: 0px;
  left: 0px;
  padding: 20px 10px 10px 10px;
  opacity: 0;
}
.newsletter > span.container.active {
  opacity: 1;
  z-index: 2;
}
.newsletter > span.container.active + .submit {
  z-index: 3;
  top: 20px;
  opacity: 1;
}
.newsletter > span.container > label {
  display: block;
  position: absolute;
  top: -5px;
  line-height: 18px;
}
.newsletter > span.container > label.fadeOut {
  opacity: 0;
  top: 10px;
}
.newsletter > span.container > input {
  padding: 15px;
  margin: 0;
  width: 100%;
  outline: none;
  border: 1px solid #d1d1d1;
  border-radius: 3px;
  font-family: -apple-system, helvetica neue, helvetica, arial, sans-serif;
  font-weight: 200;
  font-size: 18px;
  line-height: 18px;
}
.newsletter > span.container .next {
  display: block;
  position: absolute;
  height: 53px;
  width: 53px;
  top: 20px;
  right: 10px;
  text-align: center;
  border-radius: 0 3px 3px 0;
  border-top: 1px solid transparent;
  border-right: 1px solid transparent;
  border-bottom: 1px solid transparent;
}
.newsletter > span.container .next:hover {
  color: #22a31b;
  cursor: pointer;
}
.newsletter > span.container .next:hover:before {
  color: #22a31b;
}
.newsletter > span.container .next:before {
  content: '\f061';
  font-family: FontAwesome;
  font-size: 18px;
  font-weight: 200;
  line-height: 51px;
  color: #b6b6b6;
}
.newsletter > span.container span.error {
  color: red;
  position: absolute;
  display: block;
  width: 100%;
  font-size: 12px;
  line-height: 12px;
  bottom: -10px;
}
.newsletter > span.submit {
  display: block;
  position: absolute;
  height: 53px;
  width: 53px;
  top: 20px;
  right: 10px;
  text-align: center;
  opacity: 0;
  border-radius: 0 3px 3px 0;
  border-top: 1px solid transparent;
  border-right: 1px solid transparent;
  border-bottom: 1px solid transparent;
  overflow: hidden;
  background: #b6b6b6;
}
.newsletter > span.submit:hover {
  background: #22a31b;
  border-top: 1px solid #158010;
  border-right: 1px solid #158010;
  border-bottom: 1px solid #158010;
  cursor: pointer;
}
.newsletter > span.submit:hover:before {
  color: white;
}
.newsletter > span.submit:before {
  content: '\f1d8';
  font-family: FontAwesome;
  font-size: 18px;
  font-weight: 200;
  line-height: 51px;
  color: white;
}
.newsletter > span.submit:after {
  content: "提交成功！";
  display: block;
  color: white;
  font-weight: 400;
  text-shadow: 1px 1px 0 rgba(0, 0, 0, 0.3);
  height: 100%;
  width: 100%;
  line-height: 51px;
  position: absolute;
  top: 10px;
  opacity: 0;
}
.newsletter > span.submit.submitted {
  transition: 0.75s cubic-bezier(0.19, 1, 0.22, 1);
  width: calc(100% - 20px);
  background: #22a31b;
  border: 1px solid #158010;
  cursor: pointer;
  border-radius: 3px;
}
.newsletter > span.submit.submitted:before {
  color: white;
  position: relative;
  top: -50px;
  right: -100px;
  transition: .25s .75s ease-in-out;
}
.newsletter > span.submit.submitted:after {
  top: 0;
  opacity: 1;
  color: white;
  transition: .5s 1s ease-in-out;
}

.reset {
  width: 100%;
  margin-top: 138px;
  text-align: center;
  cursor: pointer;
  color: #747474;
}
.reset:hover {
  color: red;
}
</style>

页面body部分，主要是一个form表单加上一个带重置功能的div，代码如下：

<h1>请按提示操作</h1>
<form class="newsletter">
  <span class="container active">
    <label for="name">请输入您的姓名：</label>
    <input class="required" type="text" id="name" name="name"/>
    <span class="next" title="下一步"></span>
  </span>
  <span class="container">
    <label for="email">请输入您的邮箱：</label>
    <input class="required" type="email" id="email" name="email"/>
  </span>
  <span class="submit" title="提交"></span>
</form>
<div class="reset">重置表单</div>

页面的底部，需远程调用jQuery库和一个JS文件，并引入本地的一个JS文件，代码如下：

<script src='http://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js'></script>
<script src='https://cdn.jsdelivr.net/jquery.validation/1.14.0/jquery.validate.min.js'></script>
<script type="text/javascript" src="js/index.js"></script>