header {
       border-width: 5px; 
       border-style: solid;
        }
.all {
     text-align: center;
     }
.table {
       text-align: center;
       border: solid;
       }
.split2 {
        float: left;
        padding-right: 30px;
        }
.clear {
       clear: both;
       }
.explanation1 {
             font-size: 30px;
             }
.explanation2 {
              font-size: 19px;
              }
.kyoutyou {
          font-weight: bold;
          }