table.tokusho {width: 670px; margin: auto;}
table.tokusho th {text-align: left; background: #dcdddd;}
table.tokusho th,
table.tokusho td { padding:15px; border: solid 1px #231815; font-weight: normal;}
@media (max-width: 768px){
  table.tokusho {width: 100%; margin: auto;}
  }