=> You can replace the current logo with your logo. After that, you have to increase the dimension of logo area.
Otherwise, you can remove the top2 position in the layout file such as main-left-right.xml in "templates\sj_health\layouts"
Thank you SA Supporter!
I have did that, but when I increase logo area, main manu go down, and CSS is also ugly. So I think it is necessary to hack the code, or delete some of the position top1-4. But which codes exactly? I am newbie in coding.
=> please add the following code line to the end of bootstrap-responsive.min.css file in "templates/sj_health/asset/bootstrap/css" folder":
.yt-main-in2.row-fluid{
background-color: your_background_color
}
I have added this codes, but it changes not only header background, but some of body background also. Please, check the ticket to see image.