/* 导航容器 */
      .navbar {
            background: #f8f9fa;
            padding: 1rem 2rem;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 200;
        }

        /* PC端导航布局 */
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1200px;
            margin: 0 auto;
        }

        /* 网站标题 */
        .logo {
            color: #2c3e50;
            font-size: 1.5rem;
            font-weight: bold;
            text-decoration: none;
        }

        /* PC端导航链接 */
        .nav-links {
            display: flex;
            gap: 2rem;
        }

        .nav-links a {
            color: #34495e;
            text-decoration: none;
            transition: color 0.3s;
            padding-left:20px;
        }

        .nav-links a:hover {
            color: #3498db;
        }

        /* 移动端下拉菜单 */
        .mobile-menu {
            display: none;
            position: relative;
        }

        .dropdown {
            display: none;
            position: absolute;
            top: 100%;
            right: 0;
            background: white;
            box-shadow: 0 2px 5px rgba(0,0,0,0.2);
            width: 200px;
        }

        .dropdown.show {
            display: block;
        }

        .dropdown a {
            display: block;
            padding: 1rem;
            color: #34495e;
            text-decoration: none;
        }

        /* 响应式设计 */
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }

            .mobile-menu {
                display: block;
            }

            .navbar {
                padding: 1rem;
            }
        }