<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>勾股定理互动演示</title>
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<body class="bg-gradient-custom min-h-screen font-sans text-gray-800">
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<div class="container mx-auto px-4 py-8 max-w-6xl">
</body>
</html>
