Lightly grease a 9-inch springform pan.
Mix the graham cracker crumbs, brown sugar, sea salt, vanilla, and melted butter until evenly combined.
Firmly press the mixture into the bottom and slightly up the sides of the pan using the bottom of a measuring cup. Refrigerate while preparing the filling.
Beat the softened cream cheese until smooth and fluffy, about 2–3 minutes.
Add the powdered sugar, sour cream, vanilla, lemon juice, and sea salt. Mix until silky smooth, scraping the bowl several times.
In a separate chilled bowl, whip the heavy cream until stiff peaks form.
Using a rubber spatula, gently fold the whipped cream into the cream cheese mixture until fully incorporated. Do not overmix.
Spread the filling evenly over the chilled crust. Smooth the top with an offset spatula.
Cover and refrigerate for at least 8 hours or overnight.
Release the springform pan, decorate with your favorite toppings, slice, and enjoy!