Hi,

Sure, I can help you import it, please use private reply and send your website url with wordpress login so I can do it for you.

Make sure backup anything you need, the import process will remove all current data.

Hi,

I had imported the demo content for you, please check your website now.

Hi,

Yes, it's possible. Please setting coming soon page in: Settings -> Reading -> Front page.

Then the visitor will see the coming soon page when come to: http://www.sheerdoor.fr/.

And you can work with one page version in: http://www.sheerdoor.fr/home-page. It's separate with other pages.

Hi,

I can help you change the color with this css:

#DateCountdown {
    color: #fff !important;
}

For the color of round icon, it's the canvas icon. So you can't change it except you're familiar with canvas, you can found it in: /muziq/images/icons.svg.

Hi,

Use child theme is better way to do when you have custom style in your theme. But if you want, you can use third party plugin for custom style like: https://wordpress.org/plugins/simple-custom-css/. It's easy to use and powerful.

I'm recommended it for few clients don't want lose the custom style in their site.