转~~~ DIV+CSS实现三角形提示框

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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<link rel="shortcut icon"href="resources/img/logo-color.png"type="image/x-icon">
<title>测试</title>
<style>
.out-div {
color: #FFFFFF;
font-size: 16px;
line-height: 40px;
display: inline-block;
height: 40px;
width: 200px;
text-align: center;
border-radius: 5px;
margin-left: 32px;
vertical-align: top;
background-color: maroon
}.arrow {
width: 0px;
height: 0px;
border-top: 10px solid transparent;
border-right: 10px solid;
border-bottom: 10px solid transparent;
position: absolute;
margin-left: -10px;
margin-top: 10px;
border-right-color: maroon
}</style>
</head>
<body>
<div class="out-div">
<div class="arrow"></div>
<span>这是一个提示框</span>
</div>
</body>
</html>