#explain ul li::before {
  color: #40566a;
  content: '\f105';
  font-family: "font Awesome 5 Free";
  font-weight: bold;
  margin-left: -5px;
  padding-right: 5px;
}
#explain nav {
  padding: 5px 10px;
}
#explain p {
  text-indent: 1em;
}
#radar_operation {
  overflow-x: scroll;
  white-space: nowrap;
  -webkit-overflow-scrolling: touch;
}
#radar_operation tr {
  margin: 0;
  padding: 0;
}
#radar_operation tbody th {
  padding: 0.1em 0.1em 0 0;
}
#radar_operation tbody td {
  text-align: center;
}