Website Sale Banner Revamp

I want to freshen up my site by replacing every existing banner with a single, eye-catching graphic that announces our upcoming sale or special offer. The banner should instantly communicate the promotion, fit seamlessly with the current layout, and be responsive so it looks sharp on desktop and mobile.

Here is what I need from you:
• A modern, professionally designed banner (static or lightweight animated—open to your suggestion) sized to match my current banner dimensions.
• Web-ready files plus the original editable source (PSD, AI, or Figma).
• Implementation support to swap the new banner in for the old one across the site without breaking any styling or load times.

I will supply brand guidelines, color codes, copy, and access details once we start.