Bootstrap响应式Navbar问题：移动端展开后最大化窗口桌面导航不显示

问题说明 #

我用Bootstrap模板做了PC和移动端适配的导航栏，现在碰到一个Bug：当移动端导航栏处于展开状态时，把浏览器窗口最大化（切换到PC视图），移动端导航栏正常隐藏了，但PC端的导航栏却不显示。不确定修复这个问题是否需要JavaScript，如果需要的话我可以提供相关代码。

CSS代码 #

/**
* Desktop Navigation 
*/
.navbar {
  padding: 0;
}

.navbar ul {
  margin: 0;
  padding: 0;
  display: flex;
  list-style: none;
  align-items: center;
}

.navbar li {
  position: relative;
}

.navbar a,
.navbar a:focus {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0 10px 30px;
  font-size: 15px;
  font-weight: 500;
  color: #751D41;
  white-space: nowrap;
  transition: 0.3s;
}

.navbar a.active { color: #751D41}

.navbar a:hover,
.navbar .active,
.navbar .active:focus,
.navbar li:hover>a {
  color: #402D85;
}

.navbar .getintouch,
.navbar .getintouch:focus {
  padding: 8px 20px;
  margin-left: 30px;
  border-radius: 50px;
  color: #751D41;
  font-size: 14px;
  border: 2px solid #751D41;
  font-weight: 600;
}

.navbar .getintouch:hover,
.navbar .getintouch:focus:hover {
  color: #fff;
  background: #751D41;
}

/**
* Mobile Navigation 
*/
.navbar-mobile {
  display: none;
}

.mobile-nav-toggle {
  color: #fff;
  font-size: 28px;
  cursor: pointer;
  display: none;
  line-height: 0;
  transition: 0.5s;
}

.mobile-nav-toggle.bi-x {
  color: #fff;
}

@media (max-width: 991px) {
  .mobile-nav-toggle {
    display: block;
  }

  .navbar ul {
    display: none;
  }

  .navbar-mobile {
    display: block;
    position: fixed;
    overflow: hidden;
    top: 55px;
    right: 20px;
    left: 10;
    bottom: 150px;
    transition: 0.3s;
    z-index: 999;
  }
}

.navbar-mobile .mobile-nav-toggle {
  position: absolute;
  top: 15px;
  right: 15px;
}

.navbar-mobile ul {
  display: block;
  top: 55px;
  right: 15px;
  bottom: 15px;
  left: 15px;
  padding: 10px 0;
  border-radius: 10px;
  background: rgba(253, 110, 110, 0.5);
  overflow-y: auto;
  transition: 0.3s;
}

.navbar-mobile a,
.navbar-mobile a:focus {
  padding: 10px 20px;
  font-size: 14px;
  color: white;
}

.navbar-mobile a:hover,
.navbar-mobile .active,
.navbar-mobile li:hover>a {
  color: #751D41;
}

.navbar-mobile .getintouch,
.navbar-mobile .getintouch:focus {
  margin: 15px;
  color: #402D85;
}

HTML代码 #

<!-- ======= Header ======= -->
  <header id="header" class="fixed-top ">
    <div class="container d-flex align-items-center">

      <a href="#hero" class="logo me-auto"><img src="assets/img/navLogo.png" alt="" class="img-fluid"></a>

      <nav id="navbar" class="navbar">
        <ul>
          <li><a class="nav-link scrollto" href="#hero">Home</a></li>
          <li><a class="nav-link scrollto" href="#hero">About Us</a></li>
          <li><a class="nav-link scrollto" href="#hero">Our Team</a></li>
          <li><a class="nav-link scrollto" href="#hero">Our Offers</a></li>
          <li><a class="nav-link scrollto" href="#hero">Projects</a></li>
          <li><a class="nav-link scrollto" href="#hero">Careers</a></li>
          <li><a class="getintouch scrollto" href="#hero">Get In Touch</a></li>
        </ul>
        <i class="bi bi-list mobile-nav-toggle"></i>
      </nav><!-- .navbar -->

    </div>
  </header><!-- End Header -->

问题截图 #

• 移动端导航栏展开状态：
  
• 窗口最大化后：
  
• PC端导航栏未显示：
  

内容的提问来源于stack exchange，提问作者saba tananashvili