<nav class="navbar navbar-expand-lg navbar-light bg-light">
  <a class="navbar-brand" href="#">Navbar</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 mr-auto">
      <li class="nav-item active">
        <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">Link</a>
      </li>
      <li class="nav-item dropdown">
        <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
          Dropdown
        </a>
        <div class="dropdown-menu" aria-labelledby="navbarDropdown">
          <a class="dropdown-item" href="#">Action</a>
          <a class="dropdown-item" href="#">Another action</a>
          <div class="dropdown-divider"></div>
          <a class="dropdown-item" href="#">Something else here</a>
        </div>
      </li>
      <li class="nav-item">
        <a class="nav-link disabled" href="#" tabindex="-1" aria-disabled="true">Disabled</a>
      </li>
    </ul>
    <form class="form-inline my-2 my-lg-0">
      <input class="form-control mr-sm-2" type="search" placeholder="Search" aria-label="Search">
      <button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
    </form>
  </div>
</nav>

<div class="jumbotron jumbotron-fluid">
  <div class="container">
    <h1 class="display-4">Fluid jumbotron</h1>
    <p class="lead">This is a modified jumbotron that occupies the entire horizontal space of its parent.</p>
<a class="btn btn-primary" href="#" role="button">Link</a>
  </div>
</div>

<!-- Grid -->
<div class="container">
  <h2 class="text-center">Heading</h2>
  <div class="row">
    <div class="col-md">
      <h2>Lorem ipsum dolor sit amet</h2>
      <p>Lorem ipsum dolor sit amet consectetur, adipisicing elit. Adipisci, ipsa animi molestiae fuga nemo quae asperiores aspernatur rem accusantium? Totam, repellendus? Ipsum repudiandae eaque vitae rem harum, ipsam nesciunt neque?</p>
    </div>

    <div class="col-md">
       <h2>Lorem ipsum dolor sit amet</h2>
       <p>Lorem ipsum dolor sit amet consectetur, adipisicing elit. Adipisci, ipsa animi molestiae fuga nemo quae asperiores aspernatur rem accusantium? Totam, repellendus? Ipsum repudiandae eaque vitae rem harum, ipsam nesciunt neque?</p>
    </div>

    <div class="col-md">
      <h2>Lorem ipsum dolor sit amet</h2>
      <p>Lorem ipsum dolor sit amet consectetur, adipisicing elit. Adipisci, ipsa animi molestiae fuga nemo quae asperiores aspernatur rem accusantium? Totam, repellendus? Ipsum repudiandae eaque vitae rem harum, ipsam nesciunt neque?</p>
    </div>

  </div>
</div>

<!-- FAQ -->
<div class="container">
  <h2>FAQ</h2>
  <div class="accordion" id="accordionExample">
    <div class="card">
      <div class="card-header" id="headingOne">
        <h2 class="mb-0">
          <button class="btn btn-link btn-block text-left" type="button" data-toggle="collapse" data-target="#collapseOne" aria-expanded="true" aria-controls="collapseOne">
            Collapsible Group Item #1
          </button>
        </h2>
      </div>

      <div id="collapseOne" class="collapse show" aria-labelledby="headingOne" data-parent="#accordionExample">
        <div class="card-body">
          Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the <code>.show</code> class.
        </div>
      </div>
    </div>
    <div class="card">
      <div class="card-header" id="headingTwo">
        <h2 class="mb-0">
          <button class="btn btn-link btn-block text-left collapsed" type="button" data-toggle="collapse" data-target="#collapseTwo" aria-expanded="false" aria-controls="collapseTwo">
            Collapsible Group Item #2
          </button>
        </h2>
      </div>
      <div id="collapseTwo" class="collapse" aria-labelledby="headingTwo" data-parent="#accordionExample">
        <div class="card-body">
          Some placeholder content for the second accordion panel. This panel is hidden by default.
        </div>
      </div>
    </div>
    <div class="card">
      <div class="card-header" id="headingThree">
        <h2 class="mb-0">
          <button class="btn btn-link btn-block text-left collapsed" type="button" data-toggle="collapse" data-target="#collapseThree" aria-expanded="false" aria-controls="collapseThree">
            Collapsible Group Item #3
          </button>
        </h2>
      </div>
      <div id="collapseThree" class="collapse" aria-labelledby="headingThree" data-parent="#accordionExample">
        <div class="card-body">
          And lastly, the placeholder content for the third and final accordion panel. This panel is hidden by default.
        </div>
      </div>
    </div>
  </div>
</div>

External CSS

  1. https://cdn.jsdelivr.net/npm/bootstrap@4.6.0/dist/css/bootstrap.min.css

External JavaScript

  1. https://code.jquery.com/jquery-3.5.1.slim.min.js
  2. https://cdn.jsdelivr.net/npm/bootstrap@4.6.0/dist/js/bootstrap.bundle.min.js