导航栏也时尚：CSS缩放动画，让导航链接在鼠标经过时绽放！

<nav class="navbar">
        <ul class="nav-list">
            <li class="nav-item">
                <a href="#" class="nav-link">Home</a>
            </li>
            <li class="nav-item">
                <a href="#" class="nav-link">About</a>
                <ul class="dropdown">
                    <li class="dropdown-item"><a href="#" class="dropdown-link">Our Team</a></li>
                    <li class="dropdown-item"><a href="#" class="dropdown-link">Our Story</a></li>
                    <li class="dropdown-item"><a href="#" class="dropdown-link">Careers</a></li>
                </ul>
            </li>
            <li class="nav-item">
                <a href="#" class="nav-link">Services</a>
                <ul class="dropdown">
                    <li class="dropdown-item"><a href="#" class="dropdown-link">Web Design</a></li>
                    <li class="dropdown-item"><a href="#" class="dropdown-link">SEO</a></li>
                    <li class="dropdown-item"><a href="#" class="dropdown-link">Marketing</a></li>
                </ul>
            </li>
            <li class="nav-item">
                <a href="#" class="nav-link">Contact</a>
            </li>
        </ul>
    </nav>

body {
            margin: 0;
            font-family: Arial, sans-serif;
            background-color: #f0f0f0;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
        }
        .navbar {
            background-color: #333;
            width: 100%;
            position: fixed;
            top: 0;
            left: 0;
        }
        .nav-list {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            justify-content: center;
        }
        .nav-item {
            position: relative;
        }
        .nav-link {
            display: block;
            padding: 15px 20px;
            color: white;
            text-decoration: none;
            font-size: 18px;
            transition: background-color 0.3s, transform 0.3s;
            position: relative;
            z-index: 1;
        }
        .nav-link:hover {
            background-color: #555;
            transform: scale(1.1);
        }
        .nav-link::before,
        .nav-link::after {
            content: '';
            position: absolute;
            left: 50%;
            width: 0;
            height: 2px;
            background-color: #3498db;
            transition: all 0.3s;
            z-index: -1;
        }
        .nav-link::before {
            top: 0;
        }
        .nav-link::after {
            bottom: 0;
        }
        .nav-link:hover::before,
        .nav-link:hover::after {
            left: 0;
            width: 100%;
        }
        .dropdown {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            background-color: #444;
            list-style: none;
            margin: 0;
            padding: 0;
            min-width: 150px;
            z-index: 1000;
            opacity: 0;
            transform: translateY(-10px);
            transition: opacity 0.3s, transform 0.3s;
        }
        .dropdown-item {
            position: relative;
        }
        .dropdown-link {
            display: block;
            padding: 10px 15px;
            color: white;
            text-decoration: none;
            font-size: 16px;
            transition: background-color 0.3s;
        }
        .dropdown-link:hover {
            background-color: #666;
        }
        .nav-item:hover .dropdown {
            display: block;
            opacity: 1;
            transform: translateY(0);
        }