Develop a website for the client by utilizing a specific tech stack (Siteleaf, Jekyll, and Tailwind), while implementing an intricate design provided by a high-end design agency.
Analyze the client's new brand and design,and then customize Tailwind CSS with the updated colour palette, fonts, padding, and animations. Create content using Markdown files, allowing the client to easily edit the content through the Siteleaf UI. The entire process is closely integrated with GitHub, ensuring that any changes made in Siteleaf are automatically committed and pushed to the corresponding GitHub repository.
Ensure the website is properly maintained, regularly updated, and continuously developed with new features. Utilize Slack for seamless communication.