The structure 正因为…才 emphasizes that an event or an action is only happening due to a specific reason.
The reason comes after 正因为, and the event or action comes after 才.
In a sentence, the subject is placed before 才.
That’s why she bought a computer
zhèng yīnwèi rúcǐ, tā cái mǎi le yì tái diànnǎo
That is why I’m here
zhèng yīnwèi zhè ge yuányīn, wǒ cái lái dào zhèlǐ
It is because of our collective effort that the company can develop so quickly
zhèng yīnwèi yǒu dàjiā de gòngtóng nǔlì, gōngsī cái huì fāzhǎn de zhème kuài
If there are two subjects in the sentence, one of the the subjects is placed after 正因为, and the second subject is placed before 才.
I don’t want you to come back home late because I care about you