body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 30px; }
        .logo { font-size: 28px; font-weight: bold; color: #FF6B35; text-shadow: 1px 1px 2px rgba(0,0,0,0.2); }
        nav ul { display: flex; list-style: none; gap: 20px; }
        nav a { text-decoration: none; color: #333; }
        .mobile-nav-toggle { display: none; }
        h1 { color: #1E3A8A; border-bottom: 3px solid #FF6B35; padding-bottom: 10px; }
        h2 { color: #1D4ED8; margin-top: 30px; }
        h3 { color: #3B82F6; }
        .download-btn, .login-btn { display: inline-block; padding: 12px 24px; background: #FF6B35; color: white; text-decoration: none; border-radius: 5px; margin: 10px 0; }
        .download-btn:hover, .login-btn:hover { background: #E85D04; }
        img { max-width: 100%; height: auto; margin: 20px 0; border-radius: 8px; }
        footer { margin-top: 50px; padding-top: 20px; border-top: 1px solid #eee; }
        @media (max-width: 768px) {
            .mobile-nav-toggle { display: block; }
            nav ul { display: none; flex-direction: column; }
            nav.active ul { display: flex; }
            header { flex-direction: column; align-items: flex-start; }
        }