%    \begin{macrocode}

%<*sections>
%    \end{macrocode}
% \subsection{Секции и параграфы}
% \subsubsection{Section}
%    \begin{macrocode}
\providecommand\tocprethesection{}
\providecommand\tocpostthesection{.\@postskip}
\providecommand\tocsectionfill{\tocfill{.}}

\providecommand\tocsectionfont{\normalfont}
\providecommand\tocsectionfillfont{}
\providecommand\tocsectionnumfont{}
%    \end{macrocode}
% Величина отступа записи в Содержании.
% \DescribeMacro{\tocsectionindent}
%    \begin{macrocode}
\providecommand\tocsectionindent{1.5em}
%    \end{macrocode}
% Пробел после номера.
% \DescribeMacro{\tocsectionnameindent}
%    \begin{macrocode}
\providecommand\tocsectionnameindent{2.3em}

\providecommand\sectionfont{\normalfont\large\bfseries}

\providecommand\prethesection{}
\providecommand\postthesection{.~}

%    \end{macrocode}
% Величина отступа заголовка секции на странице.
% \DescribeMacro{\sectionindent}
%    \begin{macrocode}
\providecommand\sectionindent{\z@}
%    \end{macrocode}
% Величина вертикального отступа перед заголовком секции.
% \DescribeMacro{\presection}
%    \begin{macrocode}
\providecommand\presection{-3.5ex \@plus -1ex \@minus -.2ex}
%    \end{macrocode}
% Величина вертикального отступа после заголовка секции.
% \DescribeMacro{\postsection}
%    \begin{macrocode}
\providecommand\postsection{2.3ex \@plus.2ex}
%    \end{macrocode}
% Выравнивание заголовка.
% \DescribeMacro{\sectionalign}
%    \begin{macrocode}
\providecommand\sectionalign{\raggedright}

%    \end{macrocode}
% \subsubsection{Subsection}
%    \begin{macrocode}
\providecommand\tocprethesubsection{}
\providecommand\tocpostthesubsection{.\@postskip}
\providecommand\tocsubsectionfill{\tocfill{.}}

\providecommand\tocsubsectionfont{\normalfont}
\providecommand\tocsubsectionfillfont{}
\providecommand\tocsubsectionnumfont{}

\providecommand\tocsubsectionindent{3.8em}
\providecommand\tocsubsectionnameindent{3.2em}

\providecommand\subsectionfont{\normalfont\normalsize\bfseries}

\providecommand\prethesubsection{}
\providecommand\postthesubsection{.~}

\providecommand\subsectionindent{\z@}
\providecommand\presubsection{-3.25ex\@plus -1ex \@minus -.2ex}
\providecommand\postsubsection{1.5ex \@plus .2ex}
\providecommand\subsectionalign{\raggedright}

%    \end{macrocode}
% \subsubsection{Subsubsection}
%    \begin{macrocode}
\providecommand\tocprethesubsubsection{}
\providecommand\tocpostthesubsubsection{.\@postskip}
\providecommand\tocsubsubsectionfill{\tocfill{.}}

\providecommand\tocsubsubsectionfont{\normalfont}
\providecommand\tocsubsubsectionfillfont{}
\providecommand\tocsubsubsectionnumfont{}

\providecommand\tocsubsubsectionindent{7.0em}
\providecommand\tocsubsubsectionnameindent{4.1em}

\providecommand\subsubsectionfont{\normalfont\normalsize\bfseries}

\providecommand\prethesubsubsection{}
\providecommand\postthesubsubsection{.~}

\providecommand\subsubsectionindent{\z@}
\providecommand\presubsubsection{-3.25ex\@plus -1ex \@minus -.2ex}
\providecommand\postsubsubsection{1.5ex \@plus .2ex}
\providecommand\subsubsectionalign{\raggedright}

%    \end{macrocode}
% \subsubsection{Paragraph}
%    \begin{macrocode}
\providecommand\tocpretheparagraph{}
\providecommand\tocposttheparagraph{.\@postskip}
\providecommand\tocparagraphfill{\tocfill{.}}

\providecommand\tocparagraphfont{\normalfont}
\providecommand\tocparagraphfillfont{}
\providecommand\tocparagraphnumfont{}

\providecommand\tocparagraphindent{10em}
\providecommand\tocparagraphnameindent{5em}

\providecommand\paragraphfont{\normalfont\normalsize\bfseries}

\providecommand\pretheparagraph{}
\providecommand\posttheparagraph{.~}

\providecommand\paragraphindent{\z@}
\providecommand\preparagraph{3.25ex \@plus1ex \@minus.2ex}
\providecommand\postparagraph{-1em}
\providecommand\paragraphalign{\raggedright}

%    \end{macrocode}
% \subsubsection{Subparagraph}
%    \begin{macrocode}
\providecommand\tocprethesubparagraph{}
\providecommand\tocpostthesubparagraph{.\@postskip}
\providecommand\tocsubparagraphfill{\tocfill{.}}

\providecommand\tocsubparagraphfont{\normalfont}
\providecommand\tocsubparagraphfillfont{}
\providecommand\tocsubparagraphnumfont{}

\providecommand\tocsubparagraphindent{12em}
\providecommand\tocsubparagraphnameindent{6em}

\providecommand\subparagraphfont{\normalfont\normalsize\bfseries}

\providecommand\prethesubparagraph{}
\providecommand\postthesubparagraph{.~}

\providecommand\subparagraphindent{\parindent}
\providecommand\presubparagraph{3.25ex \@plus1ex \@minus .2ex}
\providecommand\postsubparagraph{-1em}
\providecommand\subparagraphalign{\raggedright}

%    \end{macrocode}
% \subsubsection{Заголовки секций}
%
% Обобщенная версия стандартного макроса, создающего заголовки секций.
%    \begin{macrocode}
\def\@sect#1#2#3#4#5#6[#7]#8{%
  \ifnum #2>\c@secnumdepth
    \let\@svsec\@empty
  \else
    \refstepcounter{#1}%
    \protected@edef\@svsec{\@seccntformat{#1}\relax}%
  \fi
  \@tempskipa #5\relax
  \ifdim \@tempskipa>\z@
    \begingroup
      #6{%
        \@hangfrom{\hskip #3\relax\@svsec}%
          \interlinepenalty \@M #8\@@par}%
    \endgroup
    \csname #1mark\endcsname{#7}%
    \addcontentsline{toc}{#1}{%
      \ifnum #2>\c@secnumdepth \else
        \protect\numberline{\@tocseccntformat{#1}}%
      \fi
      #7}%
  \else
    \def\@svsechd{%
      #6{\hskip #3\relax
      \@svsec #8}%
      \csname #1mark\endcsname{#7}%
      \addcontentsline{toc}{#1}{%
        \ifnum #2>\c@secnumdepth \else
          \protect\numberline{\@tocseccntformat{#1}}%
        \fi
        #7}}%
  \fi
  \@xsect{#5}
}

%    \end{macrocode}
% Обобщенная версия стандартного макроса, добавляющего запись в Содержание.
%    \begin{macrocode}
\def\@tocline#1#2#3#4#5#6{%
  \ifnum #2>\c@tocdepth \else
    \vskip \z@ \@plus.2\p@
    {\leftskip #3\relax \rightskip \@tocrmarg \parfillskip -\rightskip
     \parindent #3\relax\@afterindenttrue
     \interlinepenalty\@M
     \leavevmode
     \@tempdima #4\relax
     \csname toc#1font\endcsname
     \advance\leftskip \@tempdima \null\nobreak\hskip -\leftskip
     {#5}\nobreak
     \csname toc#1fillfont\endcsname \csname toc#1fill\endcsname\hfill
     \nobreak\hb@xt@\@pnumwidth{\hfil\csname toc#1numfont\endcsname #6}%
     \par%
    }%
  \fi
}

\newcommand*\l@section      {\@tocline{section}      {1}
  {\tocsectionindent}{\tocsectionnameindent}}
\newcommand*\l@subsection   {\@tocline{subsection}   {2}
  {\tocsubsectionindent}{\tocsubsectionnameindent}}
\newcommand*\l@subsubsection{\@tocline{subsubsection}{3}
  {\tocsubsubsectionindent}{\tocsubsubsectionnameindent}}
\newcommand*\l@paragraph    {\@tocline{paragraph}    {4}
  {\tocparagraphindent}{\tocparagraphnameindent}}
\newcommand*\l@subparagraph {\@tocline{subparagraph} {5}
  {\tocsubparagraphindent}{\tocsubparagraphnameindent}}

%    \end{macrocode}
% Интерфейс.
%    \begin{macrocode}
\newcommand\section{%
  \@startsection{section}{1}{\sectionindent}%
  {\presection}{\postsection}{\sectionfont\sectionalign}}
\newcommand\subsection{%
  \@startsection{subsection}{2}{\subsectionindent}%
  {\presubsection}{\postsubsection}{\subsectionfont\subsectionalign}}
\newcommand\subsubsection{%
  \@startsection{subsubsection}{3}{\subsubsectionindent}%
  {\presubsubsection}{\postsubsubsection}{\subsubsectionfont\subsubsectionalign}}
\newcommand\paragraph{%
  \@startsection{paragraph}{4}{\paragraphindent}%
  {\preparagraph}{\postparagraph}{\paragraphfont\paragraphalign}}
\newcommand\subparagraph{%
  \@startsection{subparagraph}{5}{\parindent}%
  {\presubparagraph}{\postsubparagraph}{\subparagraphfont\subparagraphalign}}

%    \end{macrocode}
% Команда для создания ненумеруемых секций, которые будут включены в Содержание.
%    \begin{macrocode}
\newcommand\nsection[1]{%
  \section*{\phantomsection\addcontentsline{toc}{section}{#1}#1}
}
%</sections>
%    \end{macrocode}