Please help me translate this sentence, especially the word line in it. What should it be translated into?

The following are my suggestions for the translation of line and staff:

Although the distinction between line and staff has gradually become blurred in large organizations in recent years, according to the classification of traditional management , line is the department directly related to generating revenue, such as production, sales, etc.; while staff refers to the department that provides support to the line, such as accounting. According to this division, line can be translated as "frontline", while staff can be translated as "logistics".

However, according to the short article you posted, it seems that line and staff will be defined in an unposted part. Then, the translation I suggest may not match its definition. Please use your own discretion.

The following is my suggested translation:

Frontline and back-office matters in human resource management

To some extent, all managers are human resource managers , as they all handle recruiting, interviewing, screening, and training. However, most companies have a human resources department with a human resources manager. How do these HR manager responsibilities relate to the HR responsibilities of frontline department managers? Let’s start with a simple definition of frontline and back-office departments to answer this question.