/* News & Twitter */
.main_sa01 {
  width: 1000px;
  margin: auto;
  display: flex;
  justify-content: space-between;
  filter: drop-shadow(0 0 3px #000);
  position: absolute;
  top: 1350px;
  right: 0;
  left: 0;
  text-shadow: 0 0 2px #000;
  transition: opacity 0.5s;
  z-index: 50;
}

.main_sa01.fixed {
position: fixed;
top: calc(50vh - 289px /2);
z-index: 50;
}

/* イントロダクション表示の調整 */
.main_sa02 {
margin-top:1000px;
}