Edit your Sections/collection.liquid file.
find code
after add this code
{% if template.name == 'index' %}
{% endif %}
Add code assets/theme.scss.liquid Or assets/timber.scss.liquid bottom of the file.
#shopify-section-featured-collections .GeneratedMarquee {
font-family:sans-serif;
font-size:3em;
line-height:1.3em;
color:#23402A;
padding:0.1em;
}
Hope this will work for you.
Thanks!