Custom Post Field Styling

Hi,
I want to to style some custom post fields when they are displayed on my listing sidebar.

e.g. Family Name : Browne

Family name is the field and Browne is the output.
I just want to style the output, like make it bold.
I have read and applied code from here – https://wpgeodirectory.com/docs/custom-field-examples/#logo

It works fine but the problem is that any styling to the output is applied to the field name too. So if I use something simple like

`/****syling the meta*****/
.geodir-entry-meta {clear: both;}

/* Family Name style */

.geodir_familyname {

float: left;
font-weight: 800;

The output is – Family Name: Browne
instead of Family name: Browne

So can I style just the “Browne” ???

Thanks