Group Characteristics or hide

Hello group!!!
For starters..., CONGRATULATIONS great idea, it's very good.
And now the question:
Is it possible to group Characteristics?
e.g.
Fuel:
  - diesel
  - gas
Gearbox type
  - automatic
  - manual
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If not, is it possible to hide e.g. CSS with one of the options
.sample-class-one-characteristic {
display: none !important;
}
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It will be very helpful for me, thank you very much in advance for your help