Bootstrap下拉菜单标题hover变蓝，如何修改该样式？

我用Bootstrap框架开发时，鼠标悬停下拉菜单标题（即触发下拉的"Name"链接）时，标题会变成蓝色。目前已经成功修改下拉菜单项hover不再变蓝，但标题的hover变色效果始终无法调整，试了网上多种解决方案都无效。

当前效果：

现有代码 #

CSS代码

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 999;
}

.top-navbar {
  background-color: #333;
  height: 40px;
}

.top-navbar-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  height: 100%;
}

.top-menu {
  list-style: none;
  display: flex;
  margin: 0;
  padding: 0;
}

.top-menu li {
  margin-right: 0px;
}

.top-menu li:last-child {
  margin-right: 0;
}

.top-menu li a {
  text-decoration: none;
  color: #fff;
  font-size: 12px;
  font-weight: 600;
}

.top-menu li a:hover {
  color: #fff;
}

.top-menu .dropdown-item {
  color: #333;
  /* Grey text color for the dropdown items */
}

.top-menu .dropdown-item:hover {
  color: #333;
  /* Grey text color for the dropdown items */
}

.main-navbar {
  background-color: #fff;
  height: 80px;
  box-shadow: 0px 4px 4px rgba(0, 0, 0, 0.1);
}

.main-navbar-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.logo-container {
  width: 80px;
}

.logo {
  width: 100%;
  height: 100%;
}

.menu-container {
  display: flex;
  align-items: center;
}

.menu {
  list-style: none;
  display: flex;
  margin: 0;
  padding: 0;
}

.menu li {
  margin-right: 20px;
}

.menu li:last-child {
  margin-right: 0;
}

.menu li a {
  text-decoration: none;
  color: #333;
  font-weight: 600;
}

.icons {
  display: flex;
  align-items: center;
  margin-left: 20px;
}

.cart-icon {
  margin-right: 20px;
  width: 100px;
  height: 100px;
}

.logo-container {
  width: 78px;
  height: 100%;
  display: flex;
  align-items: center;
}

.logo {
  width: 100%;
  height: auto;
}

.dropdown-item:hover,
.dropdown-item:focus {
  background-color: transparent;
  /* Set the background color to transparent */
  color: inherit;
  /* Inherit the text color from the parent element */
}

.top-menu li .dropdown-item a:hover {
  color: #fff;
}

HTML代码

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.3.1/dist/css/bootstrap.min.css" />
</head>

<body>
  <header class="header">
    <nav class="top-navbar" data-bs-theme="dark">
      <div class="top-navbar-container">
        <ul class="top-menu">
          <li class="nav-item dropdown">
            <a class="nav-link dropdown-toggle" href="#" id="navbarDropdownMenuLink" role="button" data-bs-toggle="dropdown" aria-expanded="false">
                            Name
                        </a>
            <ul class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
              <li><a class="dropdown-item" href="#">Action</a></li>
              <li><a class="dropdown-item" href="#">Another action</a></li>
              <li><a class="dropdown-item" href="logout.php">Logout</a></li>
              <li class="nav-item">
                <a class="nav-link" href="register.php">Register</a>
              </li>
              <li class="nav-item">
                <a class="nav-link" href="login.php">Login</a>
              </li>
            </ul>
            <div class="icons">
              <a href="cart.html"><i class="fa-solid fa-cart-shopping fa-xl"
                                    style="color: #0000ff;"></i></a>
            </div>
          </li>
      </div>
    </nav>
    <nav class="main-navbar">
      <div class="main-navbar-container">
        <div class="logo-container">
          <img src="Noah Grocery Logo.png" alt="Grocery Store Logo" class="logo">
        </div>
        <div class="menu-container">
          <ul class="menu">
            <li><a href="index.html">Home</a></li>
            <li><a href="shop.html">Shop</a></li>
            <li><a href="support/support.html">Support</a></li>
          </ul>
        </div>
      </div>
    </nav>
  </header>
  <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js"></script>
  <script src="https://cdn.jsdelivr.net/npm/popper.js@1.14.7/dist/umd/popper.min.js"></script>
  <script src="https://cdn.jsdelivr.net/npm/bootstrap@4.3.1/dist/js/bootstrap.min.js"></script>
</body>

</html>

解决方案 #

问题根源是Bootstrap默认的.nav-link:hover样式优先级高于你自定义的样式，导致修改不生效。添加以下CSS代码即可解决：

/* 覆盖下拉标题的hover样式，保持白色不变 */
.top-menu .nav-item.dropdown .nav-link.dropdown-toggle:hover,
.top-menu .nav-item.dropdown .nav-link.dropdown-toggle:focus {
  color: #fff !important;
}

额外提示：你HTML里用了data-bs-theme="dark"，这是Bootstrap 5的属性，而你加载的是Bootstrap 4，这个属性在Bootstrap 4里不生效，可以删掉避免混淆。

内容的提问来源于stack exchange，提问作者Random Coder 16