#l-header {
  position: fixed; 
  top: 0;
  width: 100%;
  z-index: 100;
}

#l-footer {
  position: fixed;
  bottom: 0;
  width: 100%;
  z-index: 100;
}

.l-sticky {
  position: fixed;
  width: 100%;
  z-index: 200;
}