CHECKED ON THESE
FOLLOWING BROWSERS
==WINDOWS==

IE11.0
SLEIPNIR6.3.6
GOOGLE CHROME74.0
OPERA60.0
FIREFOX66.0.3

==MACINTOSH==

FIREFOX3.6.3,SAFARI7.0.5
JAVASCRIPT enable
RECOMENDED SCREEN RESOLUTION higher than 1280*800
PLUG-IN Require Macromedia(Adobe) flash
LAST UPDATE 2019/5/3

Valid HTML 4.01 Transitional

正当なCSSです!