有趣的HTML实例 404页面
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<!DOCTYPE html>
<html>
<head>
    <title>404 - 页面未找到</title>
    <style>
        body {
            text-align: center;
            font-family: "Arial", sans-serif;
            margin: 0;
            padding: 0;
            overflow: hidden;
            background-color: #f7f7f7;
        }
        #notfound {
            position: relative;
            height: 100vh;
        }
        #notfound .notfound {
            position: absolute;
            left: 50%;
            top: 50%;
            -webkit-transform: translate(-50%, -50%);
            -ms-transform: translate(-50%, -50%);
            transform: translate(-50%, -50%);
        }
        .notfound {
            max-width: 520px;
            width: 100%;
            line-height: 1.4;
            text-align: center;
        }
        .notfound .notfound-404 {
            height: 180px;
            position: relative;
            z-index: -1;
        }
        .notfound .notfound-404 h1 {
            font-size: 186px;
            position: absolute;
            left: 50%;
            top: 50%;
            -webkit-transform: translate(-50%, -50%);
            -ms-transform: translate(-50%, -50%);
            transform: translate(-50%, -50%);
            font-weight: 700;
            margin: 0;
            color: #262626;
            text-shadow: -1px -1px 0 #fff, 1px 1px 0 #fff, 1px -1px 0 #fff, -1px 1px 0 #fff;
        }
        .notfound h2 {
            font-size: 38px;
            margin-top: 10px;
            font-weight: 700;
            text-shadow: -1px -1px 0 #fff, 1px 1px 0 #fff, 1px -1px 0 #fff, -1px 1px 0 #fff;
        }
        .notfound p {
            color: #767676;
            font-size: 14px;
            margin-top: 0;
        }
        .notfound a {
            font-size: 14px;
            text-decoration: none;
            color: #262626;
            text-shadow: -1px -1px 0 #fff, 1px 1px 0 #fff, 1px -1px 0 #fff, -1px 1px 0 #fff;
        }
    </style>
</head>
<body>
    <div id="notfound">
        <div class="notfound">
            <div class="notfound           
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