English Wikipedia has an article on:

hardstyle

Wikipedia

From hard +‎ style.

hardstyle (uncountable)

1. (music) A genre of electronic dance music that combines elements of trance, techno, and hardcore, with origins in the Netherlands and Belgium.
   • 2002, mik, “gabber/terror/hardcore”, in uk.music.rave (Usenet):

     hi jack. you just missed the best hardcore/gabba party: "thunderdome - a decade", here in amsterdam. 2 huge rooms filled with 15.000 people (the party had sold out weeks in advance), one room for oldstyle (92-97), one for the newer hardcore/hardstyle (97-02).

   • 2020 January 10, Joe Muggs, “Gift of the gabber: the return of dance music’s gloriously tasteless subgenre”, in The Guardian‎^[1], →ISSN:

     Boiler Room hosted hard dance specials with young crews from across Europe, while American EDM’s absorption of Dutch hardstyle – a fusion of techno and hardcore – has reached truly terrifying levels through the likes of Guatemalan DJ Carnage.

2. (sports) In contrast to sports style, a specifically intensive workout exercise, such as a swing squat.