How to remove menu border and grey dividers amongst home page?

Hi there!

I’m really hoping that someone can assist me with this. I bought a template from Station Seven but am trying to make a few adjustments to the layout:

1) I would like to remove the navigation menu border. The template comes with a border (one on top, double border on bottom). I would like to remove all borders. I currently have this entered in my CSS and it has only removed the bottom border:

.secondary-nav ul {
border: none !important;
border-bottom: none !important;
border-top: none !important;
border-radius: none !important;
box-shadow: none !important;
}

2) I would like to remove the gray lines dividing each section throughout the home page. Nothing I’ve entered in the CSS has helped me with this.

Any assistance would be greatly appreciated!!!!