In their last two trips to CenturyLink Field, the 49ers have come away stunned.In a 42-13 loss to the Seahawks in December of 2012, the 49ers went three-and-out on their opening series, then watched their opponents score touchdowns the first two times they had the ball. Seattle had a 21-0 lead early in the second quarter, and the Niners were toast.Then, in a 29-3 loss in Game 2 of this season, the Niners couldn't get on the scoreboard in the first half. Though they trailed just 5-0 at halftime, Seattle quickly scored a TD in the third quarter to go up 12-0, and the Niners again were in a deep hole. Mayor Bets on 49ers-Seahawks NFC Championship GameAt rowdy CenturyLink, where the 12th Man noise makes it hard for opposing quarterbacks' signals to be heard, the Seahawks early success in both games allowed them to dominate. Once they had a lead, they could control the game with rugged running back Marshawn Lynch.It's a formula that's worked well for Seattle, which has lost only once at home in two seasons.But as the 49ers get set to play the Seahawks Sunday afternoon (3:30 p.m.) in the NFC Championship Game, they no doubt have studied the blueprint of that lone Seattle home loss. It...