CSS实现图标的聚焦渐变(悬停魔术棒)

效果演示
源码(CSS已嵌入body)
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="http://at.alicdn.com/t/c/font_4096975_pswyqyk8tdo.css">
</head>
<body>
    <div>
        <ul>
            <li>
                <span class="iconfont icon-QQ"></span>
                <span class="iconfont icon-QQ"></span>
            </li>
            <li>
                <span class="iconfont icon-weixin"></span>
                <span class="iconfont icon-weixin"></span>
            </li>
            <li>
                <span class="iconfont icon-douyin"></span>
                <span class="iconfont icon-douyin"></span>
            </li>
        </ul>
    </div>

    <style>
        *{
    margin: 0;
    padding: 0;
    }

    ul{
        width: 180px;
        height: 45px;
        /* background-color: #000; */
        color: #fff;
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%,-50%);
        display: flex;
        list-style: none;
    }

    ul li{
        position: relative;
        margin: 0 10px;
        width: 40px;
        height: 40px;
    }

    ul li span{
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        line-height: 40px;
        text-align: center;
        cursor: pointer;
        font-size: 40px !important;
    }

    ul li span:first-child{
        height: 0;
        z-index: 2;
    }
    ul li:nth-child(1) span:first-child{
        border-bottom: 1px solid #1da1f2;
    }
    ul li:nth-child(2) span:first-child{
        border-bottom: 1px solid #25d366;
    }
    ul li:nth-child(3) span:first-child{
        border-bottom: 1px solid #f00;
    }

    ul li:nth-child(3) span{
        font-size: 32px !important;
    }

    ul li span{
        transition: all 0.5s ease-in-out;
    }
    ul li:nth-child(1):hover span:first-child{
        color: #1da1f2;
        height: 100%;
    }
    ul li:nth-child(2):hover span:first-child{
        color: #25d366;
        height: 100%;
    }
    ul li:nth-child(3):hover span:first-child{
        color: #f00;
        height: 100%;
    }

    ul li span{
        color: #222;
    }
    </style>
</body>
</html>
CSS实现图标的聚焦渐变(悬停魔术棒)

效果演示

源码(CSS已嵌入body)

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