Yeah, logistics, how do they work anyway? Getting through the manual was a slog. I would not call any of it fairly easy to make sense of.
(Reminds me of when I tried to come up with rules for a Dwarf Fortress game for playing cards. Ended up with 10 pages of wargaming lingo for what was supposed to be a fun, casual party game.)
Here's me trying to organise what I've just read in my head, maybe somebody will find it useful.
Truck or rail stations provide transport ('logistic') capacity that is spread over applicable roads/rail up to a distance beyond which it diminishes if not picked up by the range of another truck/rail station or extended (once only?) by a supply base.
This transport capacity is used to send excess items from all zones (cities) to their assigned SHQ. No capacity used here if SHQ is in the only city.
SHQ sends items where needed, be it units or cities, using the same transport capacity.
Units can pick up the last leg of supplies from nearby roads/rail, less efficiently the farther (in terms of movement cost) they are. Food is always supplied at 100% efficiency, up to the maximum range.
Rural buildings need at least 100 logistic capacity per highest building level present on hex to send output to their cities. I think it just has to be there, and is not being used up?
EDIT: Also, railways carry a ton of logistics points along their paths but have to be unloaded at railheads or stations for those points to flow onto the roads and into the field. Mostly.
I haven't yet built it, but the manual clearly states the supplies can be offloaded from any railway hex? Dead-end (no railhead or station closing the track) railways have just vastly reduced capacity.
So I tried a long time and realized Seth can't get life. I hope in the future there is more customization to the non-earthlike planets. The only planet that has most customization is Ceberus, which despite being a harsh world with giant seas of magma can generate plants AND "complex" life with actual skeletal body structures.
Kinda disappointing I can't get a Seth planet like that, but maybe in the future the creator will allow more planet customization like he did with Ceberus
Have you tried unclassified? AFAIK it's a 'anything goes' option.