/* 基础重置和字体 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Montserrat', sans-serif;
            padding-top: 100px;
        }
        
        /* 导航栏样式 */
        .floating-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: white;
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
            padding: 20px 15%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            z-index: 1000;
        }
        
        .nav-brand {
            font-size: 24px;
            font-weight: 700;
            color: #222;
            letter-spacing: 0.5px;
        }
        
        .nav-menu {
            display: flex;
            gap: 30px;
            transition: all 0.5s ease;
        }
        
        .nav-link {
            text-decoration: none;
            color: #333;
            font-size: 16px;
            font-weight: 600;
            letter-spacing: 0.3px;
            position: relative;
            padding-bottom: 5px;
            transition: all 0.3s ease;
            text-transform: lowercase;
        }
        
        .nav-link:hover, .nav-link.active {
            color: #0066cc;
        }
        
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: #0066cc;
            transition: width 0.3s ease;
        }
        
        .nav-link:hover::after, 
        .nav-link.active::after {
            width: 100%;
        }
        
        /* 汉堡菜单按钮 - 默认隐藏 */
        .menu-toggle {
            display: none;
            cursor: pointer;
            font-size: 24px;
            color: #333;
        }
        
        
        
        /* 移动端样式 */
        @media (max-width: 768px) {
            .floating-nav {
                padding: 15px 5%;
            }
            
            .nav-menu {
                position: fixed;
                top: 70px;
                left: -100%;
                width: 80%;
                height: calc(100vh - 70px);
                background: white;
                flex-direction: column;
                align-items: center;
                padding: 30px 0;
                gap: 25px;
                box-shadow: 2px 0 15px rgba(0, 0, 0, 0.1);
            }
            
            .nav-menu.active {
                left: 0;
            }
            
            .menu-toggle {
                display: block;
            }
            
            .nav-brand {
                font-size: 20px;
            }
        }
        
        @media (max-width: 480px) {
            .nav-brand {
                font-size: 18px;
            }
            
            .nav-menu {
                width: 100%;
            }
        }