Most of us know that San Diego really exposed Seattle's philosophy back in 2015.
Take your time don't make turnovers.
No need to score in a hurry, Seattle wont so take your time and only call high percentage offensive plays again no turnovers.
Let Seattle bury themselves with an inept O-line and penalties.
If Seattle gets down early they will become desperate and will be forced to score points. This plays into Russell Wilson's strengths so again take our time scoring. This is why they are able to score so well at the end of halves. As long as we are only up or down by 1 score Seattle will not change their philosophy.
Send 4 and stunt on 1st and 2nd downs, pressure will still be achievable. Play a deep zone and stay disciplined on deep balls. Seattle hates crossing patterns and short passes and will only resort to it when they have given up on long developing routes. This usually only happens at the end of haves and when Seattle is desperate. See previous statement. If Doug Baldwin catches multiple passes don't panic, he does it to most teams.
On 3rd down, Seattle will more than likely be in a 3rd and long, (not that it matters if it is 3rd and short) send complicated blitzes full force. Doesn't matter what they are just mix it up.
When Seattle goes up by 1 score at the end of the game we will be fine as long as there is at least a minute left. They will give us half the field by playing a soft zone. If we are lucky to catch them in a bump and run man cover 3 then bomb it to their weakest CB.