<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
*{ margin: 0; padding: 0;}
.box{ width: 0; height: 0; border:50px solid #f00; border-color:red transparent transparent transparent;}
.box2{width: 0; height: 0; border:50px solid #f00; border-color:red red transparent transparent; line-height: 0;}
.box3{ width:200px; height: 100px; border: 5px solid #2E8DED; margin-left:10px; position: relative;}
.box3 .arror{ position: absolute; top: 100px; left:30px; width: 50px; height: 50px;}
.a1{ border:30px solid #f00; display: block; border-color:#2E8DED transparent transparent transparent;}
.a2{ position: absolute; left: 0; top:-8px; border:30px solid #f00; display: block; border-color:#fff transparent transparent transparent;}
</style>
<script type="text/javascript" class="lazyload" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB/AAffA0nNPuCLAAAAAElFTkSuQmCC" data-original="js/jquery-1.11.3.min.js"></script>
</head>
<body>
<div class="box">
</div>
<div class="box2">
</div>
<div class="box3">
<div class="arror">
<span class="a1"></span>
<span class="a2"></span>
</div>
<p>
气泡泡泡气泡泡泡气泡泡泡气泡泡泡气泡泡泡
</p>
</div>
<script type="text/javascript">
</script>
</body>
</html>效果：
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