how to do for website home page and other page can be viewed on all plat form (cross browser) include mobile phone?
can you explain more? do you mean style them so that they are usable on all devices?
have the website on a server so you can get to it from any device?
Welcome to the forum @sochivy
Learn responsive web design, use semantic elements, media queries, follow best practices, test on various sizes of each devices, browsers and different versions of browsers.
You will then need to deploy the web site to the web.
Happy coding