我希望我的 carousal 显示在导航栏后面

Question

我希望我的 carousal 显示在导航栏后面，以便幻灯片放映在导航栏后面，而导航栏将保持在前面。我被困在解决它而我无法这样做是否有办法让我的导航栏保持在轮播前面而轮播在它后面运行？

HTML（引导程序）-

<nav class="navbar navbar-expand-lg navbar-light static ">
  <div class="container">
    <a class="navbar-brand" href="index.html" title=""><img src="images/logo2.png" alt="Victops 
Logo" /></a>

    <button class="navbar-toggler" type="button" data-toggle="collapse" data- target="#navbarSupportedContent"
      aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle 
navigation">
      <span class="navbar-toggler-icon"></span>
    </button>

    <div class="collapse navbar-collapse" id="navbarSupportedContent">
      <ul class="navbar-nav ml-auto">
        <li class="nav-item active">
          <a class="nav-link" style="font-size: 1rem;" href="member/login.html">Login</a>
        </li>
        <li class="nav-item">
          <a class="nav-link" style="font-size: 1rem;" href="health.html">Health</a>
        </li>
        <li class="nav-item">
          <a class="nav-link" style="font-size: 1rem;" href="ourstory.html">Our Story</a>
        </li>
        <li class="nav-item">
          <a class="nav-link" style="font-size: 1rem;" href="member/registerMember.html">Join now</a>
        </li>
        <li class="nav-item">
          <a class="nav-link" style="font-size: 1rem;" href="ContactUs.html">Contact us</a>
        </li>
        <li class="nav-item ">
          <a class="nav-link" style="font-size: 1rem;" href="member/login.html">Help</a>
        </li>
      </ul>
    </div>
  </div>
</nav>

<div id="carouselExampleIndicators" class="carousel slide" data-ride="carousel">
  <ol class="carousel-indicators">
    <li data-target="#carouselExampleIndicators" data-slide-to="0" class="active"></li>
    <li data-target="#carouselExampleIndicators" data-slide-to="1"></li>
    <li data-target="#carouselExampleIndicators" data-slide-to="2"></li>
    <li data-target="#carouselExampleIndicators" data-slide-to="3"></li>
  </ol>
  <div class="carousel-inner">
    <div class="carousel-item active">
      <img class="d-block w-100" src="slider-images/1.jpg" alt="First slide">
      <div class="carousel-caption d-none d-md-block">
        <h5 style="font-family: 'Nunito', sans-serif;">New Beginning with US.</h5>

      </div>
    </div>
    <div class="carousel-item">
      <img class="d-block w-100" src="slider-images/2.png" alt="Second slide">
      <div class="carousel-caption d-none d-md-block">
        <h5 style="font-family: 'Nunito', sans-serif;">New Beginning with US.</h5>

      </div>
    </div>
    <div class="carousel-item">
      <img class="d-block w-100" src="slider-images/3.png" alt="Second slide">
      <div class="carousel-caption d-none d-md-block">
        <h5 style="font-family: 'Nunito', sans-serif;">New Beginning with US.</h5>

      </div>
    </div>
    <div class="carousel-item">
      <img class="d-block w-100" src="slider-images/4.png" alt="Third slide">
      <div class="carousel-caption d-none d-md-block">
        <h5 style="font-family: 'Nunito', sans-serif;">New Beginning with US.</h5>

      </div>
    </div>
  </div>
  <a class="carousel-control-prev" href="#carouselExampleIndicators" role="button" data- slide="prev">
    <span class="carousel-control-prev-icon" aria-hidden="true"></span>
    <span class="sr-only">Previous</span>
  </a>
  <a class="carousel-control-next" href="#carouselExampleIndicators" role="button" data- slide="next">
    <span class="carousel-control-next-icon" aria-hidden="true"></span>
    <span class="sr-only">Next</span>
  </a>
</div>

CSS -

.carousel-item {
  height: 100vh;
  min-height: 300px;
  background: no-repeat center center scroll;
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}

.carousel-caption {
  bottom: 270px;
  font-family: 'Nunito', sans-serif;
}

.carousel-caption h5 {
  font-size: 45px;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-top: 25px;
}

.carousel-caption p {
  width: 75%;
  margin: auto;
  font-size: 18px;
  line-height: 1.9;
}

.navbar-light .navbar-brand {
  color: #fff;
  font-size: 25px;
  text-transform: uppercase;
  font-weight: bold;
  letter-spacing: 2px;
}

.navbar-light .navbar-nav .active>.nav-link, .navbar-light .navbar-nav .nav-link.active, .navbar- light .navbar-nav .nav-link.show, .navbar-light .navbar-nav .show>.nav-link {
  color: #fff;
}

.navbar-light .navbar-nav .nav-link {
  color: #fff;
}

.navbar-toggler {
  background: #fff;
}

.navbar-nav {
  text-align: center;
}

.nav-link {
  padding: .2rem 1rem;
}

.nav-link.active, .nav-link:focus {
  color: #fff;
}

.navbar-toggler {
  padding: 1px 5px;
  font-size: 18px;
  line-height: 0.3;
}

.navbar-light .navbar-nav .nav-link:focus, .navbar-light .navbar-nav .nav-link:hover {
  color: #fff;
}

Answer 1

使用 Z 索引

nav{
    position:relative;
    z-index:0;
    background-color:red;
}
.carousel,.carousel-control-prev,.carousel-control-next,.carouselExampleIndicators{
    position:relative;
    z-index:-1;
}