一、HTML
<article>
<h1>Lorem ipsum</h1>
<p>Ne maluisset sententiae qui, mucius epicuri reprimique et cum, sumo saperet laboramus et pri. An ignota incorrupte quo, ex his dicta nominavi, erat consulatu eum cu. Eum ea illum assum dictas, tincidunt reprimique est eu.</p>
</article>
二、CSS
/*页面背景*/
body {
background:#d4676a;
margin:50px;
font-family:sans-serif;
}
article{
background:#FFF;
border-radius:4px;
padding:20px 40px;
width:400px;
box-shadow:5px 7px 1px rgba(0,0,0,.1);
position:relative;
}
article h1{
color:#d4676a;
}
article p{
color:#666;
}
article::after{
content:'';
/*绘制四个三角形*/
width:0;
height:0;
border-width:15px 20px;
border-style:solid;
/*绘制四个三角形,只显示右边一个三角形*/
border-color:transparent #FFF transparent transparent;
position:absolute;
left:-40px;
top:35px;
}
article::after,article::before{
content:'';
width:0;
height:0;
border-width:10px;
border-style:solid;
position:absolute;
top:42px;
border-color:transparent transparent transparent #d4676a;
right:20px;
}
article::after{
/*向左移挡住一部分三角形,形成箭头*/
right:25px;
border-color:transparent transparent transparent #FFF;
}