first – what kind of box ( enfold ) a column or a icon-box etc. here is an example with columns:
i gave a custom class to those columns : hoverstyle.
https://webers-testseite.de/aussie/

Der Dev / Mods : I read about this filter in the link at Typography : avf_el_styling_responsive_font_size_skip

so i can skip the responsive settings for some ALB Elements : like headings:

function custom_responsive_font_size_skip( $skip, array $atts, \aviaShortcodeTemplate $sc_context, $font_id, $selector_container ){
	if( $sc_context instanceof avia_sc_heading ){
		return true;
	}
	return $skip;
}
add_filter( 'avf_el_styling_responsive_font_size_skip', 'custom_responsive_font_size_skip', 10, 5 );

looking which elements do have this i read about another filter : avf_responsive_media_sizes
is it possible to redefine those settings?

apply_filters( 'avf_responsive_media_sizes', array(
		'av-desktop'		=> array( 990, 0 ),
		'av-medium'		=> array( 768, 989 ),
		'av-small'		=> array( 480, 767 ),
		'av-mini'		=> array( 0, 479 )
) );

Wegen etwas höherer Browser Kompatibilität (so war es jedenfalls mal bei Safari und clamp) nutze ich für fluide font-size Definitionen die min/max Methode.
Siehe Link in Enfold Typography Sektion: https://spencermortensen.com/articles/typographic-scale/ wählte ich die musikalische Skala – und zwar einmal mit Faktor 2 und dann 3 ergeben sich folgende font-size Größen:
40-60, 36-50, 32-42, 28-34, 25-29, 22-24
was zu folgenden fluid Werten führt (ausgehend von einem viewport von 320px bis 1500px (Fluid-Font Calculator)
____
Due to slightly higher browser compatibility, I use the min/max method for fluid font-size definitions.
See link in Enfold Typography section: https://spencermortensen.com/articles/typographic-scale/ I chose the musical scale – once with factor 2 and then 3 the following font-size sizes result:
40-60, 36-50, 32-42, 28-34, 25-29, 22-24
which leads to the following fluid values (based on a viewport of 320px to 1500px (Fluid-Font Calculator)

da Enfold selbst mit CSS Variablen arbeitet:
as Enfold itself works with CSS variables:

:root {
  --enfold-font-size-theme-content: 13px;
  --enfold-font-size-theme-h1: 34px;
  --enfold-font-size-theme-h2: 28px;
  --enfold-font-size-theme-h3: 20px;
  --enfold-font-size-theme-h4: 18px;
  --enfold-font-size-theme-h5: 16px;
  --enfold-font-size-theme-h6: 14px;
}

könnte man die mittels Filter überschreiben:
you could overwrite them using a filter:

function my_avf_dynamic_css_after_vars( $output = '' ){
  $output .= "\n";
  $output .= ":root {\n";
  $output .=    "--enfold-font-size-theme-h1: min(max(40px, calc(2.5rem + (60 - 40) * ((100vw - 320px) / (1500 - 320)))), 60px);\n";
  $output .=    "--enfold-font-size-theme-h2: min(max(36px, calc(2.25rem + (50 - 36) * ((100vw - 320px) / (1500 - 320)))), 50px);\n";
  $output .=    "--enfold-font-size-theme-h3: min(max(32px, calc(2rem + (42 - 32) * ((100vw - 320px) / (1500 - 320)))), 42px);\n";
  $output .=    "--enfold-font-size-theme-h4: min(max(28px, calc(1.75rem + (34 - 28) * ((100vw - 320px) / (1500 - 320)))), 34px);\n";
  $output .=    "--enfold-font-size-theme-h5: min(max(25px, calc(1.5625rem + (29 - 25) * ((100vw - 320px) / (1500 - 320)))), 29px);\n";
  $output .=    "--enfold-font-size-theme-h6: min(max(22px, calc(1.375rem + (24 - 22) * ((100vw - 320px) / (1500 - 320)))), 24px);\n";
  $output .=    "--enfold-font-size-theme-content: min(max(16px, calc(1rem + (20 - 16) * ((100vw - 320px) / (1500 - 320)))), 20px);\n";  // p-tags  
  $output .= "}\n";

  return $output;
}
add_filter( 'avf_dynamic_css_after_vars', 'my_avf_dynamic_css_after_vars', 10, 1 );

ich behielt mal die long-hand Version der min-max schreibweise – so wird deutlich wie die font-sizes berechnet werden.
I kept the long-hand version of the min-max notation – this makes it clear how the font sizes are calculated.

um es dann global durchzusetzen dies in die quick css:
to then globally enforce this here in the quick css:

body {font-size: var(--enfold-font-size-theme-content);}
#top h1 {font-size: var(--enfold-font-size-theme-h1);  }
#top h2 {font-size: var(--enfold-font-size-theme-h2); }
#top h3 {font-size: var(--enfold-font-size-theme-h3);  }
#top h4 {font-size: var(--enfold-font-size-theme-h4); }
#top h5 {font-size: var(--enfold-font-size-theme-h5);  }
#top h6 {font-size: var(--enfold-font-size-theme-h6);  }

btw: on Layout Builder – Typography Input Fields – you can activate that switch to have:
“Activate to replace predefined selectboxes with font sizes with text fields to use custom units. Only recommended for experienced users who know, what they are doing. This is in active beta (since 5.0.1).”
– you then can insert those fluid values to that input field. e.g. for extremly big h1 headings (80-120px) etc.