很长时间没有动笔了，最近学的东西很杂很乱！又有点丢了西瓜捡芝麻，走马观花，瞻前顾后的感觉！
因此，我决定一步步来，化繁为简，今天就从border入手。
很多时候我们都会需要一个三角形或者三角小箭头。我们可以用border来做。当然还有其他很多中方法，比如直接图片，canvas等。
直接上代码吧！
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
*{
padding:0;margin:0;
}
body{padding:100px;}
.a0,.a1{
display:inline-block;
0;height:0;
border-20px;
border-style:solid;
border-color:red blue black wheat;
}
.a0{40px;height:40px;}
p{
text-align:center;
margin:20px;
}
.a2,.a2-2{
display:inline-block;
0;height:0;
border-0 50px 50px 0;
border-style:dashed solid solid dashed;
border-color:red blue transparent wheat;
}
.a2-2{
margin-left:100px;
border-50px 50px 0px 50px;
border-style:dashed solid solid dashed;
border-color:red blue transparent wheat;
}
.a3,.a3-1{
display:inline-block;
0;height:0;
border-50px;
border-style:dashed dashed solid;
border-color:transparent transparent rgb(252,146,176) !important; /*rgba(252,146,176,.2)*/
-webkit-transform:rotate(-45deg);
transform:rotate(-45deg);
}
.a3-1{
display:inline-block;
0;height:0;
margin-left:100px;
border-50px;
border-style:dashed dashed solid;
border-color:rgba(252,146,176,.2) rgba(252,146,176,.2) rgb(252,146,176) !important; /*rgba(252,146,176,.2)*/
-webkit-transform:rotate(-45deg);
transform:rotate(-45deg);
}
.a3 i,.a3-1 i{
display:inline-block;
-webkit-transform:rotate(45deg);
transform:rotate(45deg);
font-style:normal;
margin-top:18px;
margin-left:-5px;
font-size:28px;
color:white;
}
</style>
</head>
<body>
<span class="a0"></span>
<span class="a1"></span>
<p><span class="a2"></span><span class="a2-2"></span></p>
<p style="padding:20px;"><span class="a3"><i>X</i></span><span class="a3-1"><i>X</i></span></p>
</body>
</html>
