<!DOCTYPE html> <meta charset="UTF-8"> <title>Empty ruby text container</title> <link rel="author" title="Xidorn Quan" href="https://www.upsuper.org"> <link rel="help" href="https://drafts.csswg.org/css-ruby-1/#ruby-layout"> <link rel="match" href="empty-ruby-text-container-ref.html"> <div style="font-size: 64px; line-height: 5">a<ruby><rb>b</rb><rtc></rtc><rt>c</rt></ruby>d</div>