CSS文件夹比html高一个，我认为我用CSS/样式解决了它
<link rel="stylesheet"
href="https://cdn.jsdelivr.net/npm/bootstrap@4.6.0/dist/css/bootstrap.min.css"
integrity="sha384-B0vP5xmATw1+K9KRQjQERJvTumQW0nPEzvF6L/Z6nronJ3oUOFUFpCjEUQouq2+l"
crossorigin="anonymous">
<link rel="stylesheet" href="css/styles.css">
<link rel="stylesheet" href="css/styles.css">
应该是
<link rel="stylesheet" href="../css/styles.css">
