Variable UserAgentTocCssConst
UserAgentTocCss: "\n@namespace \"http://www.w3.org/1999/xhtml\";\n\n*:not([data-vivliostyle-role=doc-toc],\n [data-vivliostyle-role=doc-toc] *,\n :has([data-vivliostyle-role=doc-toc]),\n :is(h1,h2,h3,h4,h5,h6):has(+:not(nav)[data-vivliostyle-role=doc-toc])) {\n display: none;\n}\n\n[hidden] {\n display: revert;\n}\n\n[data-vivliostyle-role=doc-toc] li a {\n -adapt-behavior: toc-node-anchor;\n}\n\n[data-vivliostyle-role=doc-toc] li {\n -adapt-behavior: toc-node;\n}\n\n[data-vivliostyle-role=doc-toc] li > :not(ul,ol):first-child {\n -adapt-behavior: toc-node-first-child;\n}\n\n[data-vivliostyle-role=doc-toc] :is(ol,ul),\n[data-vivliostyle-role=doc-toc]:is(ol,ul) {\n -adapt-behavior: toc-container;\n}\n" = ...
user-agent-toc.css