CSS组件之文本输入框(input text)样式2

<!DOCTYPE HTML>
<html>
<head>
    <meta charset="utf-8">
    <title>三十课 - CSS组件之文本输入框(input text)样式2</title>
    <style>
        .row {
            margin: 0 auto;
            padding-top: 10px;
            padding-left: 5em;
            position: relative;
            z-index: 1;
        }
        .row span {
            position: relative;
            display: inline-block;
            margin: 10px;
        }
        .clean-slide {
            position: relative;
            display: inline-block;
            width: 215px;
            padding: 10px 0 10px 15px;
            font-family: "Open Sans", sans;
            font-weight: 400;
            color: #377D6A;
            background: #efefef;
            border: 1px solid #377D6A;
            border-radius: 3px;
            outline: 0;
            text-indent: 60px;
            transition: all .3s ease-in-out;
        }
        .clean-slide::-webkit-input-placeholder {
            color: #efefef;
            text-indent: 0;
            font-weight: 300;
        }
        .clean-slide + label {
            display: inline-block;
            position: absolute;
            transform: translateX(0);
            top: 0;
            left: 0;
            bottom: 0;
            padding: 13px 15px;
            font-size: 11px;
            font-weight: 700;
            text-transform: uppercase;
            color: #032429;
            text-align: left;
            text-shadow: 0 1px 0 rgba(255, 255, 255, 0.4);
            transition: all .3s ease-in-out, color .3s ease-out;
            border-top-left-radius: 3px;
            border-bottom-left-radius: 3px;
            overflow: hidden;
        }
        .clean-slide + label:after {
            content: "";
            position: absolute;
            top: 0;
            right: 100%;
            bottom: 0;
            width: 100%;
            background: #7AB893;
            z-index: -1;
            transform: translate(0);
            transition: all .3s ease-in-out;
            border-top-left-radius: 3px;
            border-bottom-left-radius: 3px;
        }

.clean-slide:focus,
        .clean-slide:active {
            color: #377D6A;
            text-indent: 0;
            background: #fff;
            border-top-left-radius: 0;
            border-bottom-left-radius: 0;
        }
        .clean-slide:focus::-webkit-input-placeholder,
        .clean-slide:active::-webkit-input-placeholder {
            color: #aaa;
        }
        .clean-slide:focus + label,
        .clean-slide:active + label {
            color: #fff;
            text-shadow: 0 1px 0 rgba(19, 74, 70, 0.4);
            transform: translateX(-100%);
        }
        .clean-slide:focus + label:after,
        .clean-slide:active + label:after {
            transform: translate(100%);
        }
    </style>
</head>
<body>
<div class="row">
  <span>
    <input class="clean-slide" id="site1" type="text" placeholder="源自程序员" /><label for="site1">三十课</label>
  </span>
    <span>
    <input class="clean-slide" id="site2" type="text" placeholder="服务程序员" /><label for="site2">思否</label>
  </span>
</div>
  <p style="color:#4a4a4a;">点击输入区域，查看示例效果！</p>
</body>
</html>