#main .sticky-block {
  position: -webkit-sticky;
  position: sticky;
  z-index: 5;
  top: 30px;
}
#main.fixed_y .sticky-block {
  top: 70px;
}
#main .sticky-block--top-0 {
  top: 0px;
}
#main .sticky-block--show-N {
  position: static;
}