.dummy-header {
  width: 100%;
  background-color: #202020 ;
  text-align: center;
  color: #fff;
  position: relative;
  border: 1px solid red;
}
.dummy-header--pc {
  height: 63px;
  line-height: 63px;
  z-index: 5;
}

.dummy-header--sp {
  height: 41px;
  line-height: 41px;
  z-index: 2;
}

.dummy-footer {
  width: 100%;
  text-align: center;
  background-color: #202020 ;
  color: #fff;
  border: 1px solid red;
}

.dummy-footer--pc {
  height: 323px;
  line-height: 323px;
}

.dummy-footer--sp {
  height: 597px;
  line-height: 597px;
}