Create a WordPress template or create own CMS for company website - open to bidding

there are 2 possible approaches: 1 we use our own custom CMS: ◦ we need a functional, static HTML-site, which we create our templates from. 2 we use WordPress as a CMS: ◦ we need a complete theme For both solutions: • and will do the integration and future maintenance ourselves • we'd like to have offers for both ways before we decide which one to go. • We'd like to agree on a design first, before development starts • require to be provided with the full source code, as we intend to continue to manage the site in-house TECHNICAL REQUIREMENTS • Responsive webdesign, HTML5, CSS3, modern JS • Supported Browsers: ◦ IE 10+, Recent 6 Versions of Google Chrome and Firefox, iOS8+, Recent Android Browser. ◦ older browsers should still display correctly, degrading gracefully • Frontend Javascript: Written in modular ES6, compiled down to ES5 via webpack + babel • Stylesheets: ◦ prefer modularized SCSS styling ◦ using a framework like Foundation 6 is preferred, bootstrap 4 or [login to view URL] are also possible • HTML: Clean and semantic HTML5 structure PROVIDE FROM US: • Logo as an Illustrator file • Fonts via Adobe TypeKit CONTENT Intro • Creative Web-Animation based on logo and/or our market • Before creating the animation, we'd like to agree on a short storyboard and a possible graphical style • see [login to view URL] for a layout-concept (but I don't like the design) • Intro is implemented as HTML5 Canvas, either 2D or 3D with WebGL. No Flash! • It's possible to play the intro on capable mobile devices • gracefully degrades to a static image on older browsers About • Text TBD Services • Icons + short descriptions • Web-Development ◦ Node.js ◦ React.js ◦ PHP ◦ Full-Stack ◦ ... ◦ Web-Animation, Canvas, WebGL • latest technologies • Mobile Development ◦ native iOS ◦ React Native Clients • Short list of logos Blog • List of posts • Categories • Detail-Pages ◦ multiple images per Post, large Slider ◦ Descriptive text • Comments via Disqus or Facebook Contact • no third-party plugins or modules • simple HTML5-form • posts to [login to view URL] Imprint / legal • Simple Content-pages with a default set of text-formatting Inspiration: • [login to view URL] • [login to view URL] • [login to view URL] • [login to view URL] • [login to view URL] • [login to view URL] • [login to view URL]