In effetti non era così arduo…
`\documentclass[a4paper]{book}
\usepackage[T1]{fontenc}
\usepackage{textcomp}
\usepackage{ucs}
\usepackage[utf8x]{inputenc}
\usepackage[italian]{babel}
\usepackage[textlf]{MinionPro}
\input glyphtounicode
\pdfgentounicode=1
\usepackage[scaled]{myriad}
\usepackage[scaled=.8]{beramono}
\usepackage{emptypage}
\usepackage{fancyhdr}
\pagestyle{fancy}
\fancyhf{}
\renewcommand{\chaptermark}[1]{\markboth{\textbf{\thechapter. #1}}{}}
\renewcommand{\sectionmark}[1]{\markright{\textbf{\thesection. #1}}}
\renewcommand{\headrulewidth}{0.5pt}
\fancyhead[LO]{\nouppercase{\rightmark}}
\fancyhead[RE]{\nouppercase{\leftmark}}
\fancyhead[LE,RO]{\thepage}
\usepackage[dvipsnames]{xcolor}
\usepackage{quotchap}
\renewcommand\sectfont{\sffamily\bfseries\Huge}
\definecolor{mybrown}{named}{Bittersweet}
\definecolor{Maroon}{cmyk}{0, 0.87, 0.68, 0.32}
\definecolor{mycyan}{rgb}{0.95,1,1}
\makeatletter
\newcommand{\capitolo}{\@ifstar{\@scapitolo}{\@capitolo}}
\newcommand{\do@sq}[1]{%
\begin{savequote}\huge\sffamily\bfseries\color{Maroon}#1\end{savequote}}
\def\@capitolo#1{%
\renewcommand\chapterheadstartvskip{\vspace*{-5\baselineskip}}%
\do@sq{#1}\chapter}
\def\@scapitolo#1#2{%
\renewcommand\chapterheadstartvskip{\vspace*{3\baselineskip}}%
\do@sq{#1}\chapter*{#2}
\markboth{#2}{#2}
\addcontentsline{toc}{chapter}{#2}}
\makeatother
\usepackage{tocloft}
\setcounter{tocdepth}{1}
\settowidth{\cftsecnumwidth}{00.00\enspace}
\makeatletter \renewcommand{\cftdot}{} \makeatother
\usepackage{titletoc}
\titlecontents*{part}[0pt]
{\scshape\color{Maroon}}
{}
{}
{\vspace*{-1em}}
{}
\usepackage{lipsum}
\usepackage{hyperref}
\hypersetup{pdfborder=0,colorlinks,citecolor=black,filecolor=black,%
linkcolor=Maroon,linktocpage,urlcolor=Maroon,bookmarksopen,hyperindex}
\usepackage{bookmark}
\begin{document}
\frontmatter
\pdfbookmark{Indice}{Indice}
\tableofcontents
\mainmatter
\phantomsection
\addcontentsline{toc}{part}{asdaf}
\capitolo{asdaf}{prova uno uno uno}
\lipsum[1]
\cleardoublepage
\phantomsection
%\addcontentsline{toc}{\protect\addvspace{1em}}{part}{qwerty}
\addcontentsline{toc}{part}{qwerty}
\capitolo{qwerty}{prova due due due}
\lipsum[2]
\end{document}`
M.
PS
Una cosa come
`\addcontentsline{toc}{\protect\addvspace{1em}}{part}{qwerty}`
mi dà errore:
`! Missing \endcsname inserted.
\protect
l.69 …tsline{toc}{\protect\addvspace{1em}}{part}
{qwerty}
?
`
mentre, aggiungendo il pacchetto interfaces
`\tocsetup{part/skip=1em}`
non fa succede niente….