This css should be added into Theme options > Custom CSS & JS > Custom CSS section. But if it does not work, make sure you don't use cache and you don't have any errors.
and the portfolio category page should be like this? http://photoraphic.com/?page_id=1776 .portfolio-category #Content { padding-top: 120px !important; }
Comments
to do this, please activate Header Minimalist option under Theme options > Header & Subheader > Header section.
http://7xivjk.com1.z0.glb.clouddn.com/6EB09786-B79F-42B2-9BA0-ACF1C10BA5DC.png
.portfolio-category #Content {
padding-top: 120px !important;
}