CorpFooter

Group footer on #121212: lockup and one-line descriptor, then Businesses, Group and Contact columns (12px tracked headings in #707072, 14px links in #DBDBDC turning white on hover, the support link in mint with an outbound arrow), and a legal row above a #39383C rule. Replaces the older indigo four-column Footer for Sivali Corp pages; the sivali.co Footer stays for Sivali Cloud Technology pages.