The Chargers are trying to find their sea legs with their new offense.

More pre-snap motion. Unbalanced formations. A dizzying array of plays.

They unveiled the new scheme Sunday and mostly came away queasy, losing to the Arizona Cardinals 26-14 in what proved to be Jim Harbaugh’s first Week 1 defeat as an NFL head coach.

Arizona, meanwhile, attacked in waves — blocking a punt in the fourth quarter and taking over three yards from the end zone. The visitors scored two plays later, silencing the already-subdued SoFi Stadium crowd.