syntax clear

runtime! syntax/html.vim

syn match sdKey "^\s*-\s*\w\w*"

syn region sdBPre matchgroup=sdKey start=+^\z(\s*\)-pre+ end=+^\( \z1\|\s*$\)\@!+

syn region sdTLink   matchgroup=sdMark start=+\[=+  end=+=]+  contains=sdTLink,sdTStrong,sdTCode,sdTEm,sdTCite,sdLinkURL
syn region sdTStrong matchgroup=sdMark start=+\[-+  end=+-]+
syn region sdTCode   matchgroup=sdMark start=+\[\.+ end=+\.]+
syn region sdTEm     matchgroup=sdMark start=+\[/+  end=+/]+
syn region sdTCite   matchgroup=sdMark start=+\[\\+ end=+\\]+

syn match sdLinkURL "\[=\S\S*"lc=2 contained

hi link sdKey Statement
hi link sdMark Type

hi link sdTLink     Normal
hi link sdLinkURL Special

hi link sdTCode   Special
hi link sdBPre   Special
hi def sdTStrong term=bold cterm=bold gui=bold
hi def sdTEm     gui=italic
hi def sdTCite   term=underline cterm=underline gui=underline