Styling for chinese character cards is based on Material Design. The cards are built using Gird Blocks. Equal height is ensured using Equalizer. Character sizing is controlled using a character number class. Characters are centered by setting "display: flex;" on the parent in css while "align-center" and "align-middle" classes are added to the parent in markup
Tough work on character sizing at multple media calls is necesary to make this work reliably.