css版tooltip

CSS样式：

<style>
        .liuwttooltip {outline:none; }
        .liuwttooltip .title {line-height:30px;}
        .liuwttooltip .content {z-index:10;display:none; padding:14px 20px;margin-top:30px; margin-left:-100px;width:300px; line-height:16px;}
        .liuwttooltip:hover .content{display:inline; position:absolute; color:#111;border:1px solid #DCA; background:#fffAF0;}
        .liuwttooltip .content .callout {z-index:20;position:absolute;top:-12px;border:0;left:50px;}
        .liuwttooltip .content{border-radius:4px;box-shadow: 5px 5px 8px #CCC;}
        .liuwttooltip pre {white-space: pre-wrap;word-wrap: break-word;}
    </style>

html结构

<span class="liuwttooltip">
            显示内容
            <span class="content">
                <img class="callout" src="data:image/gif;base64,R0lGODlhFgAMAKIAAAAAAP///9K8jv/68P///wAAAAAAAAAAACH5BAEAAAQALAAAAAAWAAwAAAMnSLrc/kwISJUYY1Z3cd6R52lbJ2IkZJ4otbItB8Mp8c7jcuP5zo8JADs=" />
                <strong class="title">标题</strong><br/>
                <pre>内容内容内容内容内容内容内容</pre>
            </span>
    </span>

效果