Elise, it is the same page as in the beginning of this thread (in private content). I did what you asked me to, can you please provide an answer? Thanks

1) All I need is
a) to have ALL hyperlinks tag on PAges, Posts, and WooCommerce to have this style:

a:not(.tabs wc-tabs) {
color: #C41E3A;
text-decoration: underline;
}
a:hover {
color: red;
}

b) I don’t want product-title to have second underline

Example what I need is here: https://ibb.co/s5Jvtw4

3) As you told me on 16 August, I disabled the underline for links in the wpb_wrapper. Now, underline for all links has disappeared. You promised me to send me a correction for CSS.

.wpb_wrapper a:not(.btn) {
color: #C41E3A;
/* text-decoration: underline;*/

3) Here’s my custom CSS for links. Please tell me how to change it.
I have been asking the same question for 4 days.

/*Change default dressing of links*/
a:not(.tabs wc-tabs) {
color: #C41E3A;
text-decoration: underline;
}
a:hover {
color: red;
}
.wpb_wrapper a:not(.btn) {
color: #C41E3A;
/* text-decoration: underline;*/
}
.wpb_wrapper a:hover {
color: red;
}
.woocommerce-product-attributes-item__value a {
color: #C41E3A;
text-decoration: underline;
}
.woocommerce-product-attributes-item__value a:hover {
color: red;
}
.meta-post-categories a {
color: white;
text-decoration: none;
}
.meta-post-categories a:hover {
color: white;
text-decoration: underline;
}
.read-more-section a {
text-decoration: none;
}