I develop a new website https://www.technologyrental.co.uk on WordPress but now I want to go custom with the same CSS and frontend is there any possible way to do this because it will save my time.
Unfortunately, WordPress themes make it somewhat difficult to edit your content manually. There are tools within WordPress to customize your site through both a drag-and-drop interface and an HTML editor, but files are split across multiple directories in many cases. You can edit the HTML through the File Manager, but they may be overwritten by plugin or theme updates.