Hi Nimue,
1. Please the class mtn
to the second custom headline to remove the margin on top of it. You can find more info about the css classes available to use here.
2. Please add this in the custom CSS:
.x-nav-tabs.top>li a {
font-size: 1.3em;
font-weight: 700;
}
3. This would require more custom code where you should target each tab through CSS add adding the image as the background image for the tab. It should be something like this:
#x-section-6 .x-nav li:nth-child(1) a {
background-image: url(URL_OF_THE_IMAGE);
}
Note that the code above will only target the first that. You will have to create other CSS declarations for the other tabs.You can find more information here as well as this link
4. This would as well require a more specific custom CSS as well. Please check this link on how you could do that.
Hope these help.