Sketch of the toy model showing the LB and the mean magnetic field in the solar neighborhood from the north pole to the Galactic plane (GP, top) and across the GP (bottom). Dark colors correspond to structures of CNM, light colors to the WNM, cyan lines to magnetic-field lines in the CNM, and purple lines to the magnetic-field lines of the WNM. The Sun position in the LB is represented by a red-white circle. An inset in the top panel shows the angle δl_i between the LB/CNM field and the mean/WNM magnetic field.