Trouble Making Hyperlinks Bold

Greetings, again,

Can you please provide us with the proper CSS to bold hyperlinks in the main body text? We’re having a problem making the hyperlinks bold (and underlined) via our child theme. We searched in main.css and found these codes but for some reason, we cannot seem to get the links to bold or underline:

a {
text-decoration: none;
}
a:focus {
outline: thin dotted;
}
a:hover,
a:active { /* Improves readability when focused and also mouse hovered in all browsers people.opera.com/patrickl/experiments/keyboard/test */
outline: 0;
}
a img {
border: 0;
}

AND

/* Links */

a,
a:visited {
font-weight: 400;
}

After adding what we would normally do to bold hyperlinks, we’re stumped:

a {
text-decoration: underline;
font-weight: bold;
}

Thank you!

The page I need help with: [log in to see the link]