摘要：
Documentbody{background-image:linear-gradient(torighttop,#f0050%,#ece50%);background-repeat:no-repeat;height:300vh;position:relative;background-size:100%calc(100%-100vh+5px);}body::after{content:'';display:block;position:fixed;top:5px;left:0;bottom:0;right:0;z-index:-1;background-color:#fff;}ViewCode效果如下：
<!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>Document</title> <style>body{background-image:linear-gradient(to right top,#f00 50%,#ece 50%);background-repeat:no-repeat;height:300vh;position:relative;background-size:100% calc(100% - 100vh + 5px); }body::after{content:'';display:block;position:fixed;top:5px;left:0;bottom:0;right:0;z-index:-1;background-color:#fff; } </style> </head> <body> </body> </html>
效果如下：
