body { font-family: 'Arial', sans-serif; line-height: 1.6; margin: 20px; } h1 { color: #333; text-align: center; margin-bottom: 20px; } h2 { color: #555; margin-top: 30px; } p { color: #666; margin-bottom: 15px; } ul { list-style: none; margin: 0; padding: 0; } li::before { content: '■ '; color: #ff…