icon代码
方法1，用图片
<link rel="icon" href="https://img.keplu.eu.org/file/img1/1749897585818_logo04.png" type="image/ico">
方法2，用字符
<link rel="shortcut icon" href="data:image/svg+xml,<svg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 100 100%22><text y=%22.9em%22 font-size=%2280%22>🌐</text></svg>">