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Given your particular CSS overrides (nice), I recommend instead overriding the Floating Horizontal Buttons because they appear on every page by default (and you can use CSS to hide on specific pages).
In Settings > AddToAny > Standard, uncheck all placement options (if you prefer to have no inline share buttons).
In Settings > AddToAny > Floating, enable the Horizontal Buttons with “Left docked” placement, uncheck “Hide on desktop screens”, and set “Offset” to 30 pixels perhaps (or just override it in CSS).
Then change your custom CSS to target .a2a_floating_style instead of .addtoany_list a.