<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title></title> <style> .box{ width: 1000px; height: 200px; margin:100px auto; border: 1px solid #000; /*background-color: red;*/ /* 浏览器私有化前缀： -webkit-: 谷歌 苹果 -moz-:火狐 -ms-：ie -o-：欧朋 */ background:-webkit-linear-gradient(left,red,blue); background:-moz-linear-gradient(left,red,blue); background:-ms-linear-gradient(left,red,blue); background:-o-linear-gradient(left,red,blue); background:linear-gradient(left,red,blue); } </style> </head> <body> <div class="box"></div> </body> </html>