如何设置节的行间间隙

Question

我想改变某一部分的线条之间的间隙。

MWE 如下；

\documentclass[12pt]{report}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage[main=turkish,english,shorthands=:!]{babel}
\usepackage{titlesec}
\usepackage[normalem]{ulem}
\usepackage{etoolbox}

\newcommand*{\myonevspace}{14pt}% <-- Define a macro \myonehalfvspace
\newcommand*{\myonehalfvspace}{21pt}% <-- Define a macro \myonehalfvspace
\newcommand*{\mytwovspace}{28pt}% <-- Define a macro \mytwovspace

% Chapter heading \titlespacing*{command}{left}{before-sep}{after-sep}[right-sep]
\titleformat{\chapter}
  {\normalfont\normalsize\bfseries}{\thechapter.}{.5em}{}
\titlespacing{\chapter}{1cm}{0cm plus 4pt minus 2pt}{\myonehalfvspace plus 2pt minus 2pt}
% Section heading
\titleformat{\section}
  {\normalfont\normalsize\bfseries}{\thesection.}{.5em}{}
\titlespacing{\section}{1cm}{\myonehalfvspace plus 4pt minus 2pt}{\myonehalfvspace plus 2pt minus 2pt}
% Subsection heading
\titleformat{\subsection}
  {\normalfont\normalsize\bfseries}{\thesubsection.}{.5em}{}
\titlespacing{\subsection}{1cm}{\mytwovspace plus 4pt minus 2pt}{\myonehalfvspace plus 2pt minus 2pt}
% Subsubsection heading
\titleformat{\subsubsection}
  {\normalfont\normalsize\bfseries}{\thesubsubsection.}{.5em}{}
\titlespacing{\subsubsection}{1cm}{\mytwovspace plus 4pt minus 2pt}{\myonehalfvspace plus 2pt minus 2pt}

\begin{document}

\chapter{Chapter 1}

\section{Long Section Title Long Section Title Long Section Title Long Section Title Long Section Title}


\end{document}

谢谢。