How to make hyperlink to change color after a click with css or jQuery in Squarespace?

Attaching the code i used below

It is working but as soon as I click on the accordion block, that this link opens, the color of the link goes back to the default. How to code the relationship between the link and the block that this link opens?

section[data-section-id="64d10fdacb42bb51bdc96a48"] a:link 
{
  color: #29201a !important; 
  text-decoration: none !important;
}

section[data-section-id="64d10fdacb42bb51bdc96a48"] active a { 
  color: #a48f7d !important;
  text-decoration: none !important;
}```

https://bullfrog-oboe-ll4p.squarespace.com/branding

password : ollie

Attached the screenshots below

See this