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<head>
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    <meta name="viewport" content="width=device-width, initial-scale=1.0">
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    <meta name="author" content="Exrick">
    <meta name="keyword" content="京东创客商城开放平台">

    <title>500</title>

    <style>

        .body-500 {
            background: #8075c6;
            color: #fff;
        }

        body {
            color: #797979;
            background: #f1f2f7;
            font