.container {
  padding: 1%;
}

.content {
  display: flex;
  padding: 20px 0;
}

.main {
  flex: 1 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  height:1500px;
#  margin-right: 10px;
  background-image: url("../images/haikei.gif")

}
.side {
  display: flex;
#  align-items: center;
#  justify-content: center;
  position: -webkit-sticky;
  position: sticky;
#  position: fixed;
  top: 10;
  width: 250px;
  height:1000px;
  color: #fff;
  background-color: gold;
}