<html><head><style>#grad1 { height: 150px; width: 200px; background-color: red; /* 适用于不支持渐变的浏览器 */ background-image: repeating-radial-gradient(red, yellow 10%, green 15%);}</style></head><body><h1>重复径向渐变</h1><div id="grad1"></div></body></html>