body{font-family:Poppins,Arial,sans-serif;background:#f8fafc;color:#1f2937;margin:0}
header{background:#4f46e5;color:#fff;padding:20px;text-align:center}
nav{background:#eef2ff;padding:10px;text-align:center}
nav a{margin:0 8px;color:#3730a3;text-decoration:none;font-weight:600}
.container{max-width:1100px;margin:auto;padding:20px}
pre{background:#0f172a;color:#e5e7eb;padding:15px;border-radius:8px;overflow-x:auto}
table{width:100%;border-collapse:collapse;margin:20px 0}
th,td{border:1px solid #e5e7eb;padding:10px}
th{background:#e0e7ff}
.tip{background:#ecfdf5;border-left:4px solid #22c55e;padding:10px;margin:15px 0}
footer{text-align:center;padding:15px;background:#e5e7eb}