body { font-family: 'Segoe UI', Meiryo, sans-serif; line-height: 1.8; margin: 20px; color: #333; } h1 { color: #0078D4; text-align: center; border-bottom: 2px solid #0078D4; padding-bottom: 10px; } h2 { color: #005A9E; border-bottom: 1px solid #ccc; padding-bottom: 8px; margin-top: 40px; } h3 { colo…