Direct URL Slug Index Page Banner Not Showing

Site URL: http://https%3Awww.guniwheel.com

Hello,

I'm working in the brine family, and have banner background images added on my varies index pages. The banner background images show when I view the site as a whole, but if I enter in the direct URL slug (example: guniwheel.com/our-solution) the image doesn't show and displays a white background. Since the text in this page is also white, I can't see the text.  Does anyone know how to fix this?  

You can set background color by adding this code to Page Settings > Advanced > Header

<style>
  .Main {
    background: red;
}
</style>