简单的404页面代码：
<!DOCTYPE html>
<html>
<head>
<title>404 Page Not Found</title>
<style>
body {
margin: 0;
padding: 0;
background: #f2f2f2;
font-family: Arial, sans-serif;
}
.container {
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
height: 100vh;
background: linear-gradient(to right, #3946dc, #ff4b2b);
background-size: 400% 400%;
animation: gradient 10s ease infinite;
}
@keyframes gradient {
0% {
background-position: 0% 50%;
}
50% {
background-position: 100% 50%;
}
100% {
background-position: 0% 50%;
}
}
h1 {
font-size: 10em;
color: #fff;
margin: 0;
text-shadow: 2px 2px #000;
}
p {
font-size: 2em;
color: #fff;
margin: 0;
margin-top: 20px;
text-shadow: 1px 1px #000;
}
a {
font-size: 3.6em;
color: #fff;
margin-top: 20px;
text-decoration: none;
border: 2px solid #fff;
padding: 10px 20px;
border-radius: 5px;
transition: all 0.3s ease;
}
a:hover {
background: #fff;
color: #ff4b2b;
}
@media screen and (max-width: 768px) {
h1 {
font-size: 10em;
}
p {
font-size: 2em;
}
a {
font-size: 3em;
}
}
</style>
</head>
<body>
<div class="container">
<h1>404</h1>
<p>Page Not Found</p>
<a href="/" target="_blank">点击访问网站首页</a>
</div>
<!-- 统计代码 -->
</body>
</html>直接替换宝塔默认404页面，另外一些CMS，如EYOUCMS，直接替换/public/errpage/目录下的404文件；PBOOTCMS替换/core/template/error.html文件！