<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>JS Bin</title>
</head>
<body>
<div class="background-box"></div>
<div class="border-box"></div>
</body>
</html>
<style>
/* 背景图片实现 */
.background-box {
400px;
height: 100px;
/* 透明色替换为当前背景底色 */
background:linear-gradient(-135deg, transparent 50px, red , yellow) top right;
background-size: 50% 50%;
background-repeat: no-repeat;
}
/* 边框实现 */
.border-box {
100px;
height: 50px;
background: linear-gradient(#e66465, #9198e5);
position: relative;
}
.border-box::after {
position: absolute;
content: "";
right: 0;
top: 0,
0;
height: 0;
border-bottom: 50px solid transparent;
border-right: 50px solid #FFF; /*颜色替换为当前卡片底色*/
border-left: 50px solid transparent;
}
</style>