Hi Yoshikazu Takayama,

I’m afraid what you’re trying to achieve requires customization work. Unfortunately, this is a service that we do not provide.

We only share snippet only to solve issues with our theme. Any further request for CSS snippets will have to be part of a defect that needs to be fixed urgently. No snippets will be shared otherwise.

If you want to go further with the customization of your website, we advise that you hire a freelancer to do it for you.

If you’re on a tight budget, we recommend you to require the services from Envato Studio freelancers (https://studio.envato.com/explore/websites-programming). This web platform gives you access to developers who have already experience with theme customizations, and for very competitive prices.

Thank you for your understanding.