css3 绘制扇形

css3 绘制扇形，可使用利用border的属性，首先绘制一个原型，然后使用border-color属性设置一条边的颜色即可。

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <meta name="viewport" content="width=device-width, initial-scale=1.0">

    <meta http-equiv="X-UA-Compatible" content="ie=edge">

    <title>sector</title>

    <style>
        .sector {

            width: 0;

            height: 0;

            border-width: 50px;

            border-style: solid;

            border-color: transparent transparent transparent #b5c4b1;

            border-radius: 50px
        }
    </style>

</head>

<body>

    <div class="sector"></div>

</body>
```html