body {
  background-attachment: fixed;
  background-image: url(https://dq.h1g.jp/img/toweroffantasy/pcbg.webp);
  z-index: 0;
  background-size: auto;
}

div.mainbody{
    background-color: rgba(255,255,255,0.9)!important;
    border: 1px solid #ccc !important;
    box-shadow: 0 2px 0 #ccc !important;
}
ul.breadcrumb li{
  color:#8B4500;
  background-color:rgba(255,255,255,0.9);
  padding: 0.5em 0.5em 0.5em 2em;/*ボックス内の余白*/
  border: solid 1px gray;/*線の種類 太さ 色*/
}