Strikethrough Style is not working on the Wordpress Page

[louierosero-gss]

I used this double tilde (~~) to create a line-through layout in the text on the content.

But on the website that I was working on. This is the output.

Below is the lists of style that I add in my custom.css

---

i, cite, em, var, address {
font-style: italic;
}

strong, b {
font-weight: bold;
}

s, strike, del {
text-decoration: line-through;
}

[bviktor]

It's quite ridiculous because in the preview window it actually shows it properly, but the final, rendered post page shows it as it is, as tildes.