.form-fon {
    max-height: 520px;
}

.maxwidth-theme {
 margin-top: 22px
}

.group_description_block {
    margin-top: 50px;
}

@media (max-width: 992px) {
  .group_description_block {
    margin-top: 40px;
}  
}

@media (max-width: 600px) {
  .form-fon {
    max-height: 570px;
}  
}

@media (max-width: 480px) {
  .form-fon {
    max-height: 630px;
}  
.group_description_block {
    margin-top: 20px;
}
}