如何将导航栏置于背景之上

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 9999;
}

.container {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  position: relative;
  z-index: 9999;
}

.container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  position: relative;
  z-index: 9999;
}