The 49ers have won eight in a row, including two straight playoff victories in hostile conditions on the road.Yet now San Francisco faces the supreme test. If the 49ers want to return to the Super Bowl, they'll have to beat the Seahawks in Seattle, which is a death trap for visiting teams. In their most recent two games at CenturyLink Field, the 49ers have been outscored 71-16 and have looked flustered by the noise and rowdy "12th Man" atmosphere.In both games, in fact, quarterback Colin Kaepernick had trouble being heard by his teammates in the huddle and at the line of scrimmage.The Niners go into Sunday's game with both the Seahawks, and the noise, on their minds."He just has to be louder," Niners center Jonathan Goodwin told reporters this week, when asked how Kaepernick will deal with the issue. "There's really no special tricks. You've just got to be as loud as possible and hope everyone hears it."If Sunday's game were to be played on a neutral field or in San Francisco, it's possible the 49ers would be favored. But with the game at CenturyLink, the Seahawks are 3½-point favorites.How can the 49ers turn the tables and beat the Seahawks on their home turf? Here are...