css 实现边框渐变(完美兼容)
方法很简单，创建一个大盒子，将其设置成渐变，然后在大盒子里设置一个小盒子，小盒子背景设置成白底。
首先创建一个父级盒子元素，给其设置渐变。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
.stacked-linear {
width: 500px;
height: 500px;
margin: auto;
padding: 10px;
border-radius: 10px;
background:
linear-gradient(217deg, rgba(255, 0, 0, .8), rgba(255, 0, 0, 0) 70.71%),
linear-gradient(127deg, rgba(0, 255, 0, .8), rgba(0, 255, 0, 0) 70.71%),
linear-gradient(336deg, rgba(0, 0, 255, .8), rgba(0, 0, 255, 0) 70.71%);
}
</style>
</head>
<body>
<div class="stacked-linear">
</div>
</body>
</html>
接下来在父类盒子里添加一个子盒子：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
.stacked-linear {
width: 500px;
height: 500px;
margin: auto;
padding: 10px;
border-radius: 10px;
background:
linear-gradient(217deg, rgba(255, 0, 0, .8), rgba(255, 0, 0, 0) 70.71%),
linear-gradient(127deg, rgba(0, 255, 0, .8), rgba(0, 255, 0, 0) 70.71%),
linear-gradient(336deg, rgba(0, 0, 255, .8), rgba(0, 0, 255, 0) 70.71%);
}
.blank{
width: 100%;
height: 100%;
background: #fff;
}
</style>
</head>
<body>
<div class="stacked-linear">
<div class="blank"></div>
</div>
</body>
</html>