% superfig golden example 2 -- a small branchy architecture, not a tensor
% shape diagram. Main path uses the cursor; the residual is a skip edge;
% the group is captioned on the shared lane, not as an overlay.
%   ../scripts/build.sh branch-architecture.tex
\documentclass[border=10pt]{standalone}
\usepackage[cjk]{superfig}

\sfsetrole{enc}{sfTeal}
\sfsetrole{attn}{sfOrange}
\sfsetrole{ffn}{sfViolet}
\sfsetrole{out}{sfCoral}

\begin{document}
\begin{tikzpicture}

\sfstage{S}{双分支结构：主路 + 残差}
\sfvgap{7mm}
\sfrow{R1}{12mm}
  \sfnode[role=enc]{in}{输入}{16mm}{10mm}
  \sfconn{e1}{}
  \sfnode[role=attn]{attn}{注意力}{18mm}{10mm}
  \sfconn{e2}{特征}
  \sfnode[role=ffn]{ffn}{前馈}{18mm}{10mm}
  \sfgap{\sflinklen}
  \sfnode[role=enc]{add}{融合}{14mm}{10mm}
  \sfconn{e4}{}
  \sfnode[role=out]{out}{输出}{14mm}{10mm}
\sfrowend

% No overlay caption: it would sit on the residual. Caption the group below.
\sfgroup[role=attn]{block}{(attn)(ffn)}{}
\sfarrow{block.east}{add.west}
\sfarrowlabel[bend left=18]{in.north}{add.north}{残差}

\sflane{R1}
\sfcaption{in}{输入}{源数据}
\sfcaption{block}{主路模块}{注意力 + 前馈}
\sfcaption{add}{融合}{残差相加}
\sfcaption{out}{输出}{目标表示}

\sfbbox{all}
\sfmeaningbox{mb}{108mm}{all}
  {主路逐层处理，残差边跳过主路}
  {输入、主路模块、融合节点、输出}
  {残差把输入直接送入融合，减轻深层优化负担}

\end{tikzpicture}
\end{document}