Create a sleek, modern banner for the analytics company Fyllu

Create a sleek, modern banner for the analytics company Fyllu. Use a gradient background transitioning from dark slate gray to a lighter blue-gray, matching the tones in the existing logo. On the left side of the banner, prominently display the slogan 'Your complete analytics department, on demand' in crisp white text. The font should be clean and professional, possibly a sans-serif typeface. On the right side of the banner, incorporate abstract data visualization elements such as stylized bar charts, line graphs, or scatter plots that fade into the background. These elements should use shades of blue and white to complement the logo's color scheme. Maintain ample negative space to keep the design clean and impactful. The overall aesthetic should convey professionalism, technological advancement, and reliability in data analytics services