Update

indent/less.vim

@@ -6,6 +6,36 @@
 if exists("b:did_indent")
   finish
 endif
+let b:did_indent = 1
+
+setlocal autoindent sw=2 et
+setlocal indentexpr=GetLessIndent()
+setlocal indentkeys=o,O,*<Return>,<:>,!^F
+
+" Only define the function once.
+if exists("*GetLessIndent")
+  finish
+endif
+
+let s:property = '^\s*:\|^\s*[[:alnum:]#{}-]\+\%(:\|\s*=\)'
+
+function! GetLessIndent()
+  let lnum = prevnonblank(v:lnum-1)
+  let line = substitute(getline(lnum),'\s\+$','','')
+  let cline = substitute(substitute(getline(v:lnum),'\s\+$','',''),'^\s\+','','')
+  let lastcol = strlen(line)
+  let line = substitute(line,'^\s\+','','')
+  let indent = indent(lnum)
+  let cindent = indent(v:lnum)
+  if line !~ s:property && cline =~ s:property
+    return indent + &sw
+  "elseif line =~ s:property && cline !~ s:property
+    "return indent - &sw
+  else
+    return -1
+  endif
+endfunction
+
+" vim:set sw=2:
 
-runtime! indent/css.vim