.header.is-sticky .header-main {
  position: fixed;
  width: 100%;
  z-index: 400;
  top: 0;
  left: 0;
  background-color: #fff;
  box-shadow: rgba(99, 99, 99, 0.2) 0px 2px 8px 0px;
}
@media screen and (max-width: 991px) {
  .header.is-sticky .header-main {
    animation: moveDown 1s cubic-bezier(0.61, 0.22, 0.23, 1);
  }
}