Checkboxes are not visible / missing

Hello,

thank you first for the great Theme Enfold. It is really good looking and makes fun working with it.
We have one big problem. The checkboxes and radio buttons are not visible or looking miserable and are not useable. For us, they are important because we do booking and stuff with our page.

For example I added a checkbox with label Test on https://mosel-dogs.de/impressum/ . I cant see the checkbox (Mac, Chrome).
It doesn’t matter if it is a checkbox in a contact form or on a normal page. I thought Contact Form 7 has to do with it, but I don’t think so. I think it is an enfold problem.

What we did already:
Disable Javascript
Commented out every css rule with checkbox und base.css, rtl.css and shortcodes.css
Enfold -> Performance -> Disabled compress css file
Enfold -> Performance -> Delete old js / css files
Design -> Customizer -> Additional css:

input[type=”checkbox”] {
-webkit-appearance: checkbox !important;
-moz-appearance: checkbox !important;
-ms-appearance: checkbox !important;
-o-appearance: checkbox !important;
appearance: checkbox !important;
}

#top input[type=checkbox].input-text {
width: 14px !important;
margin: 0 10px 0 0 !important;
}

input[type=”radio”] {
-webkit-appearance: radio !important;
-moz-appearance: radio !important;
-ms-appearance: radio !important;
-o-appearance: radio !important;
appearance: radio !important;
}

#top input[type=radio].input-text {
width: 14px !important;
margin: 0 10px 0 0 !important;
}

Nothing worked. It would be great if you could help us.

Thank you very much