<style>
        /* 初始化样式 */

        * {
            margin: 0;
            padding: 0;
        }

        a {
            text-decoration: none;
        }

        li {
            list-style-type: none;
        }

        input,
        button {
            outline: none;
        }

        .l {
            float: left;
        }

        .r {
            float: right;
        }

        .c:after {
            clear: both;
            width: 0;
            padding: 0;
            content: "";
            display: block;
            visibility: hidden;
        }

        html,
        body {
            background: #ebf9f9;
        }
        /* 添加样式 */

        #header>div {
            width: 500px;
            height: 100px;
            margin-top:20px;
        }
        .one{
            background: #0f0;

        }
        .two{
            background: orange;

        }

        #header .one ul>li {
            padding: 10px 0px 10px 20px;
        }

        #header .one ul>li a {
            padding-left: 16px;
            background: url(http://r.biquge5200.com/images/all.gif) no-repeat;
            border: 1px solid red;
        }

        #header .one ul>li:nth-of-type(1) a {
            background-position: 0px 5px;
        }

        #header .one ul>li:nth-of-type(2) a {
            background-position: 0px -16px;
        }

        .two ul li{
           position:relative;
        }
        .two ul li span{
            display: inline-block;
            border:1px solid red;
            width:20px;
            height:21px;
            position:absolute;
            left:0;
            top:0;
        }
          .two ul li{
              margin:0px 20px;
          }
          .two ul li  a{
              margin-left:20px;
          }
        .two ul li span{
                background: url(http://r.biquge5200.com/images/all.gif) no-repeat;
        }
        .two ul li:nth-of-type(1) span{
            background-position: 0px 5px;
        }
        .two ul li:nth-of-type(2) span{
            background-position: 0px -16px;
            
        }
    </style>
</head>

<body>
    <div id="header">
        <div class="one">
            <ul>
                <li class="l">
                    <a href>将笔趣阁快捷键下载到桌面</a>
                </li>
                <li class="l">
                    <a href>收藏笔趣阁</a>
                </li>
            </ul>
        </div>
        <div class="two">
            <ul>
                <li class="l">
                    <span></span>
                    <a href>将笔趣阁快捷键下载到桌面</a>
                </li>
                <li class="l">
                    <span></span>                    
                    <a href>收藏笔趣阁</a>
                </li>
            </ul>
        </div>
    </div>
</body>

</html>