<!-- 导航栏开始。这个导航栏使用了Tailwind CSS为样式，支持亮暗模式，响应式设计。 -->
<nav class="bg-white border-gray-200 dark:bg-gray-900">
    <!-- 主容器。使用Flexbox布局，确保内容在不同屏幕尺寸下正确排列。 -->
    <div class="flex flex-wrap items-center justify-between max-w-screen-xl mx-auto p-4">

        <!-- 左侧：Logo和品牌名称 -->
        <a href="https://flowbite.com" class="flex items-center space-x-3 rtl:space-x-reverse">
            <!-- Logo图像。高度固定，宽度自适应。 -->
            <img src="https://flowbite.com/docs/images/logo.svg" class="h-8" alt="Flowbite Logo" />
            <!-- 品牌名称。使用自适应居中、文字大小和粗体样式。 -->
            <span class="self-center text-2xl font-semibold whitespace-nowrap dark:text-white">Flowbite</span>
        </a>

        <!-- 右侧：用户交互区域（登录、注册按钮）和移动菜单按钮 -->
        <div class="flex items-center md:order-2 space-x-1 md:space-x-2 rtl:space-x-reverse">
            <!-- 登录按钮。样式包括悬停效果、焦点效果，适应不同屏幕大小。 -->
            <a href="#" class="text-gray-800 dark:text-white hover:bg-gray-50 focus:ring-4 focus:ring-gray-300 font-medium rounded-lg text-sm px-4 py-2 md:px-5 md:py-2.5 dark:hover:bg-gray-700 focus:outline-none dark:focus:ring-gray-800">Login</a>
            <!-- 注册按钮。使用不同的颜色方案，同样具有悬停和焦点效果。 -->
            <a href="#" class="text-white bg-blue-700 hover:bg-blue-800 focus:ring-4 focus:ring-blue-300 font-medium rounded-lg text-sm px-4 py-2 md:px-5 md:py-2.5 dark:bg-blue-600 dark:hover:bg-blue-700 focus:outline-none dark:focus:ring-blue-800">Sign up</a>
            <!-- 移动设备上的菜单按钮。仅在小屏幕上显示，用于展开菜单。 -->
            <button data-collapse-toggle="mega-menu" type="button" class="inline-flex items-center p-2 w-10 h-10 justify-center text-sm text-gray-500 rounded-lg md:hidden hover:bg-gray-100 focus:outline-none focus:ring-2 focus:ring-gray-200 dark:text-gray-400 dark:hover:bg-gray-700 dark:focus:ring-gray-600" aria-controls="mega-menu" aria-expanded="false">
                <span class="sr-only">Open main menu</span>
                <svg class="w-5 h-5" aria-hidden="true" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 17 14">
                    <path stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M1 1h15M1 7h15M1 13h15"/>
                </svg>
            </button>
        </div>

        <!-- 主菜单。默认在小屏幕上隐藏，桌面设备上显示。 -->
        <div id="mega-menu" class="items-center justify-between hidden w-full md:flex md:w-auto md:order-1">
            <!-- 菜单项列表。根据屏幕大小改变布局方向（列到行）。 -->
            <ul class="flex flex-col mt-4 font-medium md:flex-row md:mt-0 md:space-x-8 rtl:space-x-reverse">
                <!-- 主页链接 -->
                <li>
                    <a href="#" class="block py-2 px-3 text-blue-600 border-b border-gray-100 hover:bg-gray-50 md:hover:bg-transparent md:border-0 md:hover:text-blue-600 md:p-0 dark:text-blue-500 md:dark:hover:text-blue-500 dark:hover:bg-gray-700 dark:hover:text-blue-500 md:dark:hover:bg-transparent dark:border-gray-700" aria-current="page">Home</a>
                </li>

                <!-- 带下拉菜单的公司链接 -->
                <li>
                    <!-- 触发下拉菜单的按钮 -->
                    <button id="mega-menu-dropdown-button" data-dropdown-toggle="mega-menu-dropdown" class="flex items-center justify-between w-full py-2 px-3 font-medium text-gray-900 border-b border-gray-100 md:w-auto hover:bg-gray-50 md:hover:bg-transparent md:border-0 md:hover:text-blue-600 md:p-0 dark:text-white md:dark:hover:text-blue-500 dark:hover:bg-gray-700 dark:hover:text-blue-500 md:dark:hover:bg-transparent dark:border-gray-700">
                        Company <svg class="w-2.5 h-2.5 ms-3" aria-hidden="true" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 10 6">
                            <path stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="m1 1 4 4 4-4"/>
                        </svg>
                    </button>
                    <!-- 复杂的下拉菜单 -->
                    <div id="mega-menu-dropdown" class="absolute z-10 grid hidden w-auto grid-cols-2 text-sm bg-white border border-gray-100 rounded-lg shadow-md dark:border-gray-700 md:grid-cols-3 dark:bg-gray-700">
                        <!-- 第一列下拉菜单项 -->
                        <div class="p-4 pb-0 text-gray-900 md:pb-4 dark:text-white">
                            <ul class="space-y-4" aria-labelledby="mega-menu-dropdown-button">
                                <li><a href="#" class="text-gray-500 dark:text-gray-400 hover:text-blue-600 dark:hover:text-blue-500">About Us</a></li>
                                <li><a href="#" class="text-gray-500 dark:text-gray-400 hover:text-blue-600 dark:hover:text-blue-500">Library</a></li>
                                <li><a href="#" class="text-gray-500 dark:text-gray-400 hover:text-blue-600 dark:hover:text-blue-500">Resources</a></li>
                                <li><a href="#" class="text-gray-500 dark:text-gray-400 hover:text-blue-600 dark:hover:text-blue-500">Pro Version</a></li>
                            </ul>
                        </div>
                        <!-- 第二列下拉菜单项 -->
                        <div class="p-4 pb-0 text-gray-900 md:pb-4 dark:text-white">
                            <ul class="space-y-4">
                                <li><a href="#" class="text-gray-500 dark:text-gray-400 hover:text-blue-600 dark:hover:text-blue-500">Blog</a></li>
                                <li><a href="#" class="text-gray-500 dark:text-gray-400 hover:text-blue-600 dark:hover:text-blue-500">Newsletter</a></li>
                                <li><a href="#" class="text-gray-500 dark:text-gray-400 hover:text-blue-600 dark:hover:text-blue-500">Playground</a></li>
                                <li><a href="#" class="text-gray-500 dark:text-gray-400 hover:text-blue-600 dark:hover:text-blue-500">License</a></li>
                            </ul>
                        </div>
                        <!-- 第三列下拉菜单项 -->
                        <div class="p-4">
                            <ul class="space-y-4">
                                <li><a href="#" class="text-gray-500 dark:text-gray-400 hover:text-blue-600 dark:hover:text-blue-500">Contact Us</a></li>
                                <li><a href="#" class="text-gray-500 dark:text-gray-400 hover:text-blue-600 dark:hover:text-blue-500">Support Center</a></li>
                                <li><a href="#" class="text-gray-500 dark:text-gray-400 hover:text-blue-600 dark:hover:text-blue-500">Terms</a></li>
                            </ul>
                        </div>
                    </div>
                </li>
                <!-- 团队链接 -->
                <li>
                    <a href="#" class="block py-2 px-3 text-gray-900 border-b border-gray-100 hover:bg-gray-50 md:hover:bg-transparent md:border-0 md:hover:text-blue-600 md:p-0 dark:text-white md:dark:hover:text-blue-500 dark:hover:bg-gray-700 dark:hover:text-blue-500 md:dark:hover:bg-transparent dark:border-gray-700">Team</a>
                </li>
                <!-- 联系方式链接 -->
                <li>
                    <a href="#" class="block py-2 px-3 text-gray-900 border-b border-gray-100 hover:bg-gray-50 md:hover:bg-transparent md:border-0 md:hover:text-blue-600 md:p-0 dark:text-white md:dark:hover:text-blue-500 dark:hover:bg-gray-700 dark:hover:text-blue-500 md:dark:hover:bg-transparent dark:border-gray-700">Contact</a>
                </li>
            </ul>
        </div>
    </div>
</nav>