/*-----Set-----*/ body { margin: 0; background-color: #005243; } /*-----PageContents-----*/ /*-----tab no kanri-----*/ .tab_class { width: calc(100%/2); height: 50px; background-color: #000000; display: block; float: left; order: -1; } /*-----tab1-----*/ #mapset1 { position: absolute; margin: 0 auto; display: inline-block; } #mapset2 { position: absolute; width: 50%; height: 25%; top: 40%; margin: 0 auto; display: inline-block; } /*-----tab2-----*/