A paragraph before the block.
The block title First body paragraph of the block, long enough to wrap onto a second line so a line break is exercised inside the block body. Second body paragraph.
A paragraph after the block. A soft block The soft trait adds a tinted head and a thin rule; both are artifacts, so the structure stays flat: title and body are plain text-unit>text siblings of the surrounding text, no Div. A paragraph after the soft block.
A rounded block The pgf-drawn rounded frame and drop shadow are one artifact behind the box; the structure must stay exactly as for the square title-bar block.
A paragraph after the rounded block.