styles.css

article {counter-reset: h2counter;}
article  h1 {counter-reset: h2counter;}
article  h2 {counter-reset: h3counter;}
article #toc h2#mw-toc-heading {counter-reset: h2counter 0}
article  h3  {counter-reset: h4counter;}
article  h4  {counter-reset: h5counter;}
article  h5 {counter-reset: h6counter;}
article  h2:before, article #mw-content-text h2:before {
        content: counter(h2counter) ".\0000a0\0000a0";
        counter-increment: h2counter;
      
    }
article #toc h2#mw-toc-heading:before {content:""}
article  h3:before {
        content: counter(h2counter) "." counter(h3counter) ".\0000a0\0000a0";
        counter-increment: h3counter;

    }
article  h4:before {
        content: counter(h2counter) "." counter(h3counter) "." counter(h4counter) ".\0000a0\0000a0";
        counter-increment: h4counter;
       
    }
article  h5:before {
        content: counter(h2counter) "." counter(h3counter) "." counter(h4counter)"."counter(h5counter) ".\0000a0\0000a0";
        counter-increment: h5counter;
       
    }
article  h6:before {
        content: counter(h2counter) "." counter(h3counter) "." counter(h4counter)"."counter(h5counter)"." counter(h6counter) ".\0000a0\0000a0";
        counter-increment: h6counter;
       
    }
    
/*Keine Nummerierung bei */
#mw-content-text .sectionflex h2::before, #mw-content-text .sectionflex h3::before,  #mw-content-text .bs-social-entity-wrapper h3::before {content:none}
#mw-content-text .mw-category h2::before, #mw-content-text .mw-category-generated h2::before,#mw-content-text .mw-category h3::before, #mw-content-text .mw-category-generated h3::before {content:none}
.ns-special #mw-content-text h2::before, .ns-special #mw-content-text h3::before {content:none;}