An enduro (or all-mountain) bike is built exactly for that scenario—aggressive descending with self-powered climbing. These bikes come with longer suspension travel and slacker geometry than trail bikes, giving you confidence and control on steep, rough descents, rock gardens, and drops.
The trade-off is weight and climbing efficiency. Enduro bikes are heavier and their slacker angles make climbing feel less snappy compared to trail or XC bikes. You'll still get to the top under your own power, just not as quickly. If you spend more than 70% of your ride time descending technical terrain or racing enduro, that's a worthwhile trade.
If your local trails are mellow or you prioritize fitness and speed on climbs, a trail bike is probably the better all-around choice. But if you're seeking out steep, gnarly descents and want a bike that thrives there while still climbing to access them, enduro is your category.