since you want to be formal and trendy, you might as well take the yuppie route. It is completely in line with the literal understanding that a formal coat is matched with trendy items. The first kind, suits+popular items are built inside.

second, suit jacket+shirt+casual pants, not complete dress.

third, a suit top with jeans and a shirt.

fourth, only the jacket of the suit is reserved, and the underskirt and trousers are matched with fashionable items.

the four manifestations of yuppies are exactly fashionable, but they are different. It is carefully found that the main style single item actually uses only two suits, and four different images can appear. If you constantly change the inside of these four items and add two inside ones, there will be eight manifestations of yuppie.