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<!DOCTYPE html>
<html lang="vi">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
<title>HỆ THỐNG CẢNH BÁO</title>
<style>
body { background: #000; color: #f00; font-family: 'Courier New', Courier, monospace; text-align: center; margin: 0; padding: 0; overflow: hidden; user-select: none; -webkit-user-select: none; }
#setup-screen { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: #000; z-index: 10000; display: flex; flex-direction: column; align-items: center; justify-content: center; cursor: pointer; }
.gift-box { border: 3px solid #0f0; padding: 30px; border-radius: 15px; color: #0f0; animation: pulse 1.5s infinite; }
<!DOCTYPE html>
<html lang="vi">
<head>
<meta charset="UTF-8">
<title>HỆ THỐNG PHÁT HIỆN XÂM NHẬP!</title>
<style>
body {
background: #000; color: #f00;
font-family: 'Courier New', Courier, monospace;
text-align: center; padding-top: 15%;