@media (width > 720px) {
  body {
    display: flex;
    gap: 10px;
    background-color: #e8e8e8;
    margin-left: 0;
    margin-right: auto;
    padding: 0;
  }
  .side-advertise {
    position: sticky;
    top: 10px;
    height: 770px;
    width: 300px;
    min-width: 300px;
    background-color: #f4f4f4;
    & > div {
      margin-bottom: 10px;
    }
  }
  #main {
    background-color: #fff;
    padding: 6px 12px 100px 12px;
    width: 917px;
    min-width: 917px;
  }
}