Base64 PDF解析器
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<head><meta charset="UTF-8"><title>Base64 PDF解析器</title><style>body {font-family: Arial, sans-serif;max-width: 800px;margin: 20px auto;padding: 20px;}.container {border: 1px solid #ccc;padding: 20px;border-radius: 5px;}textarea {width: 100%;height: 150px;margin: 10px 0;}button {padding: 10px 20px;background-color<