.yb0:after{content:"";color:white;background-color:#DDDDDD;}.y1{color:#FF9900;}.yb1:after{content:"特急";color:black;background-color:#FF9900;}.y2{color:#AA0000;}.yb2:after{content:"急行";color:white;background-color:#AA0000;}.y3{color:#0000BB;}.yb3:after{content:"快速";color:white;background-color:#0000BB;}