Will there always be the same number of Style records for each item? If not then there's no way to do this. If so, then you could try this:
1. Group on Item.
2. Make the Item group header section tall enough to match the height of all of the details sections you expect to have.
3. Place the Item field in the correct column in the Item group header and in the middle of the height of the section.
4. In the Section Expert, turn on "Underlay Following" for the Item group header.
-Dell