.container{margin:50px auto; width: 800px; text-align: center;background: #ccc;} //大的轮廓div
padding: 40px;
width: 280px;
height: 100px;
border-radius: 10px;}
.con-arrow:after{
position: absolute;
right: 100%;
top:50%;
margin-top: -15px;
content: '';
border:30px solid;
border-color:transparent #88b7d5 transparent transparent ;
}
</head>
<body>
<div class="container"> //外层div
<div class="con-arrow">asdf</div> //内层窗口div
</div>
.con-arrow{ //内层div
position: relative;
background: #88b7d5;padding: 40px;
width: 280px;
height: 100px;
border-radius: 10px;}
.con-arrow:after{
position: absolute;
right: 100%;
top:50%;
margin-top: -15px;
content: '';
border:30px solid;
border-color:transparent #88b7d5 transparent transparent ;
}
</head>
<body>
<div class="container"> //外层div
<div class="con-arrow">asdf</div> //内层窗口div
</div>