.ofsrbase {
    position: relative;
    width: 1580px;
    margin: 0 auto;
}
.ofsrwrap {
    width: 90%;
    margin: 1em auto;
    overflow-x: auto;
}
.mousedownb {
    text-align: center;
    font-family: arial, sans-serif;
    display: inline-block;
    height: 1.2em;
    width: 1.2em;
    line-height: 1;
    background-color: rgba(0,0,0,30%);
    opacity: 0.4;
    color: #fff;
    font-size: 2em;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 20px;
    margin: auto;
    cursor: pointer;
}
@media screen and (max-width: 880px) {
  .mousedownb{
    top: inherit;
    bottom: 0;
    left: 0;
    right: 2.0em;
  }
}
@media screen and (max-width: 768px) {
  .mousedownb{
    display: none;
  }
}
.mousedownb::after{
  content: "\f053";
  font-family: "Font Awesome 5 Free";
	font-weight: 900;
  color: #FFF;
  font-size: 1.3rem;
  height: 13px;
  position: absolute;
  margin: auto;
  top: 0;
  bottom: 0;
  left: 2px;
  right: 0;
}

.mousedowna {
    text-align: center;
    font-family: arial, sans-serif;
    display: inline-block;
    height: 1.2em;
    width: 1.2em;
    line-height: 1;
    background-color: rgba(0,0,0,30%);
    opacity: 0.4;
    color: #fff;
    font-size: 2em;
    position: absolute;
    top: 0;
    bottom: 0;
    right: 20px;
    margin: auto;
    cursor: pointer;
}
@media screen and (max-width: 880px) {
  .mousedowna{
    top: inherit;
    bottom: 0;
    left: 2.0em;
    right: 0;
  }
}
@media screen and (max-width: 768px) {
  .mousedowna{
    display: none;
  }
}


.mousedowna::after{
  content: "\f054";
  font-family: "Font Awesome 5 Free";
	font-weight: 900;
  color: #FFF;
  font-size: 1.3rem;
  height: 13px;
  position: absolute;
  margin: auto;
  top: 0;
  bottom: 0;
  left: 2px;
  right: 0;
}
/*Chrome*/
.ofsrwrap::-webkit-scrollbar {/*縦方向スクロールバーの幅*/
width: 4px;
}
.ofsrwrap::-webkit-scrollbar:horizontal {/*横方向スクロールバーの高さ*/
height: 2px;
}
.ofsrwrap::-webkit-scrollbar-track {/*スクロールバーの軌道*/
background: #FFF;
}
.ofsrwrap::-webkit-scrollbar-thumb {/*つまみの部分*/
border-radius: 0px;
background: #EFEFEF;

}
.ofsrwrap::-webkit-scrollbar-thumb:hover {/*マウスホバー時*/
background: #DDD;
}
/*Firefox*/
.ofsrwrap{
scrollbar-width: thin;/*細さ(幅・高さ両方に適用)*/
scrollbar-color: #FFFFFF #FFFFFF;/*つまみの色 軌道の色*/
}


@media screen and (max-width: 880px) and (min-width: 769px) {
  .ofsrwrap::-webkit-scrollbar-thumb {/*つまみの部分*/
  border-radius: 0px;
  background: #FFFFFF;

  }
  .ofsrwrap::-webkit-scrollbar-thumb:hover {/*マウスホバー時*/
  background: #FFFFFF;
  }
  /*Firefox*/
  .ofsrwrap{
  scrollbar-width: thin;/*細さ(幅・高さ両方に適用)*/
  scrollbar-color: #FFFFFF #FFFFFF;/*つまみの色 軌道の色*/
  }
}