html,body{height:100%}body{margin:0;padding:0}iframe{width:100%;border:none;margin:0;padding:0}.mas,.dai,.rna{flex:1;display:flex}.mas{display:flex;flex-direction:column;height:55px}.dai{flex-direction:row;height:calc(100% - 55px)}#F10{height:48px;min-height:48px}#F11{height:100%;width:370px;min-width:370px}#F12{height:100%}