Naruto could use his shadow clones to create a diversion. He might make a bunch of clones and have them attack the Akatsuki members in different directions while he tries to find a way out. For example, he could use the chaos to search for a hidden passage or a weak spot in their hideout.
In fanfiction, if Naruto gets kidnapped by Akatsuki, he might be used as a bargaining chip. The Akatsuki could try to exchange him for something valuable like the Nine - Tailed Fox's chakra. Or they might try to extract the Nine - Tails from him forcefully. Naruto would surely put up a fight though, using his Rasengan and other jutsu.
Naruto would definitely fight back. Despite being kidnapped, she has a strong will and a lot of chakra. She would use her Shadow Clone Jutsu to create distractions and try to break free from her captors. And she would also be yelling at them, trying to get them to see the error of their ways.
One possibility is that the Akatsuki members might try to extract information from her. Since Naruto has a lot of knowledge about the Hidden Leaf Village. Maybe they want to know about the Nine - Tails inside her. However, Naruto is very stubborn, so she would likely resist their interrogation attempts.
In fanfiction, Naruto has a lot of ways to escape from Akatsuki if kidnapped. He could wait for an opportunity when the Akatsuki members are preoccupied with their internal disputes. Since he has a strong bond with his friends in Konoha, they might be on their way to rescue him. Naruto could also use his unique Uzumaki bloodline abilities, like his strong life force, to endure any torture or imprisonment until he finds a way to get out. He might even discover some secrets about the Akatsuki during his captivity that could be used to his advantage.
Maybe the Akatsuki members who kidnapped Naruto start to have second thoughts. Some of them might realize that Naruto is not just a tool for their goals. They could begin to see his value as a person and his potential to bring peace in a different way. This could lead to internal conflicts within the Akatsuki group.
Well, in such a fanfiction, Sakura might be used as a bargaining chip. The Akatsuki could try to exchange her for something valuable, like secret jutsu. Or they might want to extract information from her about Konoha's defenses.
Well, one possible plot could be that the Akatsuki kidnap Hinata to use her Byakugan for their own purposes. Maybe they want to study it to gain an edge in their battles or espionage. They might hold her captive in one of their secret hideouts, which could be an old, abandoned fortress.
Well, in this fanfiction, it could be that Akatsuki has a change of heart. Some members might realize that Naruto represents a hope for the ninja world in a different way than they initially thought. So they step in to save him when he's in a really tough situation, like being trapped in a powerful jutsu or surrounded by a large number of enemy ninjas. They use their own unique skills, like Kisame's water jutsu or Itachi's Sharingan abilities to fight off the threats.
They might treat her harshly at first to break her spirit. But then, realizing her value, they could start to offer her deals, like freedom in exchange for her cooperation. However, Sakura is a tough character, so she'd likely resist their attempts.