meihuak Of course, Iβve prepared the CSS code to meet your request. If you want it to appear in a different location, feel free to let me know. Iβve adjusted the colors to adapt to light/dark mode, but I canβt say itβs perfect.
By the way, instead of using this CSS, why not use the Modern Footer extension configured to appear only in discussions? It would offer similar functionality with more management options.
CSS Code
.DiscussionPage-discussion::after {
content: "This is a signature area. It appears below the discussion.";
display: block;
margin: 50px auto;
padding: 10px 20px;
background-color: var(--control-bg-shaded);
border-top: 1px solid var(--muted-color);
font-size: 0.9em;
color: var(--text-color);
text-align: center;
max-width: 800px;
border-radius: 5px;
box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}
Web
Mobile