<html lang="en"><head> <meta charset="UTF-8"> <title>欢迎来到蝴蝶教程</title></head><body> <h1>SVG 径向渐变</h1> <svg height="150" width="500"> <defs> <radialGradient id="grad1" cx="50%" cy="50%" r="50%" fx="50%" fy="50%"> <stop offset="0%" style="stop-color:rgb(255,255,255); stop-opacity:0" /> <stop offset="100%" style="stop-color:rgb(0,0,255);stop-opacity:1" /> </radialGradient> </defs> <ellipse cx="200" cy="70" rx="85" ry="55" fill="url(#grad1)" /> 抱歉，您的浏览器不支持嵌入式SVG。 </svg></body></html>