Cfrgtkky

My code and the related picture is shown. How to create a space between two child notes and leave node in tikzpicture?

begin{figure*}

    centering

    begin{tikzpicture} [baseline=-0.5ex] 

begin{scope}[sibling distance=10cm,

  every node/.style = {,shape=rectangle, rounded corners,

    draw, align=center, minimum size=.75cm,

    top color=white, align=center, bottom color=blue!20}]]

    node (a) at (0,2) {Goal : Company sustainability };

    node (c2) at (-1,0)  {Governance};

    node (c3) at (0,0)  {Proper time};

    node (c1) at (-2,0){Skill Man power};

     node (c4) at (1,0) {Logistic Support};

      node (c5) at (2,0) {Work atmosphere};

    node (a1) at (-2,-2) {Expected Salary};

    node (a2) at (-1,-2) {Employee flexibility };

    node (a3) at (0,-2) {Boss Behaviour };

    node (a4) at (1,-2) {Project Presentation };

    node (a5) at (2,-2) {Switching Department};

end{scope}

draw (a)--(c1) (a) -- (c2) (a) -- (c3)  (a)-- (c4) (a)-- (c5) 

(c1) -- (a1) (c1) -- (a2) (c1) -- (a3) (c1) -- (a4) (c1) -- (a5)

(c2) -- (a1) (c2) -- (a2) (c2) -- (a3) (c2) -- (a4) (c2) -- (a5)

(c3) -- (a1) (c3) -- (a2) (c3) -- (a3) (c3) -- (a4) (c3) -- (a5)

(c4) -- (a1) (c4) -- (a2) (c4) -- (a3) (c4) -- (a4) (c4) -- (a5)

(c5) -- (a1) (c5) -- (a2) (c5) -- (a3) (c5) -- (a4) (c5) -- (a5)

;

end{tikzpicture}

    caption{Caption}

    label{fig:my_label}

end{figure*}

With forest. (I most likely permuted your items, sorry for that!)

documentclass[border=3mm]{standalone}

usepackage{forest}

begin{document}

begin{forest}

for tree={shape=rectangle, rounded corners,

    draw, align=center, minimum size=.75cm,

    top color=white, align=center, bottom color=blue!20,

    l sep+=10mm}

[Goal : Company sustainability,alias=n0

 [Governance,alias=n1-1

  [Proper time,alias=n2-1]

 ] 

 [Skill Man power,alias=n1-2

  [Logistic Support,alias=n2-2]

 ] 

 [Work atmosphere,alias=n1-3

  [Expected Salary,alias=n2-3]

 ]

 [Employee flexibility,alias=n1-4

  [Boss Behaviour,alias=n2-4]

 ] 

 [Project Presentation,alias=n1-5 

  [Switching Department,alias=n2-5]

 ] 

]

foreach X in {1,...,5}  

{foreach Y in {1,...,5}

{ifnumX=Y

else

draw (n1-X) to[out=-90,in=90,looseness=0.3] (n2-Y);

fi}  } 

end{forest}

end{document}