% monoref -- clickable links via hyperref.
% IMPORTANT: load monoref AFTER hyperref.
% [hidelinks] removes the coloured boxes around links.
% Compile ONCE with LuaLaTeX:  lualatex 03-hyperref-links.tex
\documentclass{article}
\usepackage{lipsum}
\usepackage[hidelinks]{hyperref}
\usepackage{monoref}
\begin{document}

\section{Introduction}\label{sec:intro}
Jump to Section~\ref{sec:results} on page~\pageref{sec:results} -- the
number and the page are live hyperlinks, resolved in a single pass.
The table of contents entries are clickable too.
\lipsum[1-3]

\subsection{Background}\label{sub:bg}
\lipsum[1-3]

\section{Results}\label{sec:results}
Back to Section~\ref{sec:intro} on page~\pageref{sec:intro}.
\lipsum[1-2]

\end{document}