org-mode latex syling

template_org.el

(require 'ox-latex)
(unless (boundp 'org-latex-classes)
  (setq org-latex-classes nil))
  
(add-to-list 'org-latex-classes
          '("doc_vaud"
          "\\documentclass[french,fleqn,10pt,hidelinks]{article}
           \\usepackage[utf8]{inputenc}
           \\usepackage{titling}
           \\usepackage{babel}
           \\usepackage[dvipsnames]{xcolor}
           \\usepackage{graphicx}
           \\usepackage{wrapfig}
           \\usepackage{color}
           \\usepackage{titling} %make title hook
           \\usepackage{titlesec}
           \\usepackage{tikz}\\usetikzlibrary{shapes.misc}
           \\usepackage{fancyhdr}
           \\pagestyle{fancy}
           % Headers
           \\lhead{\\includegraphics[width=20px]{./logo.png}}%
           \\chead{\\thetitle - {\\today}}

           % Footers
           \\lfoot{{\\scriptsize Direction des systèmes d'information – DSI \\newline Avenue de Longemalle 1, CH-1020 Lausanne \\newline www.vd.ch – T 41 21 316 26 00 – F 41 21 316 27 26}}%
           \\rhead{\\thepage}%
           \\cfoot{}%
           \\rfoot{}%
           \\renewcommand{\\headrulewidth}{0.4pt}
           \\renewcommand{\\footrulewidth}{0.4pt}
          % Section style
          \\newcommand\\titlebar{%
          \\tikz[baseline,trim left=3.1cm,trim right=3cm] {
          \\fill [ForestGreen!60!White] (2.5cm,-1ex) rectangle (\\textwidth+3.1cm,2.5ex);
          \\node [fill=ForestGreen,
            anchor= base east,
            rounded rectangle,
            minimum height=3.5ex] at (3cm,0) {
          \\textbf{\\thesection.0}
                 };
             }%
          }
         \\titleformat{\\section}{\\large}{\\titlebar}{0.1cm}{}
         %\\renewcommand*{\\thesection}{\\arabic{section}}
         % redefine title page
         % calling maketitle hook
         \\postdate{\\par \\par \\par \\newline \\includegraphics{./logo.png}
         \\vspace*{\\fill}
                    \\par \\par Classification : Interne DSI \\par Destinataires : Collaborateurs DSI
                    \\pagebreak}
         "

          ("\\section{%s}" . "\\section*{%s}")
          ("\\subsection{%s}" . "\\subsection*{%s}")
          ("\\subsubsection{%s}" . "\\subsubsection*{%s}")
          ("\\paragraph{%s}" . "\\paragraph*{%s}")
          ("\\subparagraph{%s}" . "\\subparagraph*{%s}"))
      )