/* 偲スタジオ共有導線：公開「内部」と内部ポータル「戻る」を同一座標・同一領域に固定する。 */
@media (min-width:901px){
  .site-header{display:grid;grid-template-columns:max-content minmax(0,1fr) 64px 157px;justify-content:initial}
  .site-header .site-nav{grid-column:2;grid-row:1;justify-content:flex-end}
  .site-header .internal-chip{grid-column:3;grid-row:1;width:64px;margin-left:0}
  .site-header .switcher,.site-header .portal-switcher{grid-column:4;grid-row:1;width:157px}
  .site-header .switcher select{width:100%}
  .site-header .portal-switcher{display:block;height:34px;visibility:hidden}
}
@media (max-width:900px){
  .site-header{display:grid;grid-template-columns:minmax(0,1fr) auto 64px 0}
  .site-header .site-nav{grid-column:2;grid-row:1}
  .site-header .internal-chip{grid-column:3;grid-row:1;width:64px;margin-left:0}
  .site-header .switcher{display:none}
  .site-header .portal-switcher{display:block;grid-column:4;grid-row:1;width:0;height:34px;visibility:hidden}
}