body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        header { background: linear-gradient(135deg, #003366, #0066cc); color: white; padding: 20px; border-radius: 10px; margin-bottom: 30px; }
        .logo { font-size: 28px; font-weight: bold; text-shadow: 2px 2px 4px rgba(0,0,0,0.3); }
        nav { display: flex; justify-content: space-between; align-items: center; }
        .mobile-menu { display: none; }
        @media (max-width: 768px) {
            .desktop-nav { display: none; }
            .mobile-menu { display: block; }
        }
        .btn { background: #ff9900; color: white; padding: 10px 20px; border-radius: 5px; text-decoration: none; font-weight: bold; }
        h1 { color: #003366; border-bottom: 3px solid #ff9900; padding-bottom: 10px; }
        h2 { color: #0066cc; margin-top: 30px; }
        h3 { color: #3399ff; }
        .download-section { background: #f0f8ff; padding: 20px; border-radius: 10px; margin: 20px 0; }
        .community-box { background: #fff8e6; padding: 15px; border-radius: 8px; margin: 15px 0; }
        footer { margin-top: 40px; padding-top: 20px; border-top: 2px solid #eee; }
        .tag { background: #e6f2ff; padding: 5px 10px; border-radius: 15px; margin: 5px; display: inline-block; }