/* 确保导航栏在所有设备上都固定在顶部 */
    .navbar {
        position: fixed !important;
        top: 0 !important;
        left: 0 !important;
        right: 0 !important;
        width: 100% !important;
        z-index: 1000 !important;
        background: transparent !important;
        backdrop-filter: none !important;
        -webkit-backdrop-filter: none !important;
        border-bottom: none !important;
        transition: all 0.3s ease !important;
    }
    
    /* 滚动时的导航栏样式 */
    .navbar.scrolled {
        background: rgba(15, 23, 42, 0.95) !important;
        backdrop-filter: blur(20px) !important;
        -webkit-backdrop-filter: blur(20px) !important;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1) !important;
        box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1) !important;
    }
    
    /* 页面顶部间距已删除，因为导航栏现在是透明的 */
    
    /* 现代化汉堡菜单按钮 */
    .mobile-menu-btn {
        display: none;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        width: 40px;
        height: 40px;
        background: rgba(255, 255, 255, 0.1);
        border: 1px solid rgba(255, 255, 255, 0.2);
        border-radius: 12px;
        cursor: pointer;
        padding: 0;
        z-index: 10001;
        position: relative;
        margin-left: auto;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        backdrop-filter: blur(10px);
    }
    
    .mobile-menu-btn:hover {
        background: rgba(255, 255, 255, 0.15);
        border-color: rgba(255, 255, 255, 0.3);
        transform: scale(1.05);
    }
    
    .hamburger-line {
        width: 20px;
        height: 2px;
        background: linear-gradient(90deg, #6366f1, #8b5cf6);
        border-radius: 2px;
        transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        transform-origin: center;
        display: block;
        opacity: 1;
        margin: 2px 0;
        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
    }
    
    .mobile-menu-btn.active {
        background: rgba(99, 102, 241, 0.2);
        border-color: rgba(99, 102, 241, 0.4);
    }
    
    .mobile-menu-btn.active .hamburger-line:nth-child(1) {
        transform: rotate(45deg) translate(0, 4px);
        background: linear-gradient(90deg, #ec4899, #f97316);
    }
    
    .mobile-menu-btn.active .hamburger-line:nth-child(2) {
        opacity: 0;
        transform: scaleX(0);
    }
    
    .mobile-menu-btn.active .hamburger-line:nth-child(3) {
        transform: rotate(-45deg) translate(0, -4px);
        background: linear-gradient(90deg, #ec4899, #f97316);
    }
    
    /* 移动端全屏导航覆盖层 */
    .mobile-nav-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        background: rgba(15, 23, 42, 0.98);
        backdrop-filter: blur(20px);
        z-index: 10000;
        opacity: 0;
        visibility: hidden;
        transform: translateY(-100%);
        transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    }
    
    .mobile-nav-overlay.show {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }
    
    /* 移动端导航内容 */
    .mobile-nav-content {
        height: 100%;
        display: flex;
        flex-direction: column;
        padding: 20px;
    }
    
    /* 移动端导航头部 */
    .mobile-nav-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 20px 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        margin-bottom: 30px;
    }
    
    .mobile-nav-logo img {
        height: 40px;
        width: auto;
    }
    
    .mobile-nav-close {
        width: 40px;
        height: 40px;
        background: rgba(255, 255, 255, 0.1);
        border: 1px solid rgba(255, 255, 255, 0.2);
        border-radius: 50%;
        color: white;
        font-size: 18px;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        transition: all 0.3s ease;
    }
    
    .mobile-nav-close:hover {
        background: rgba(255, 255, 255, 0.2);
        transform: scale(1.1);
    }
    
    /* 移动端导航菜单 */
    .mobile-nav-menu {
        flex: 1;
        display: flex;
        flex-direction: column;
        gap: 15px;
    }
    
    .mobile-nav-item {
        display: flex;
        align-items: center;
        padding: 18px 20px;
        background: rgba(255, 255, 255, 0.05);
        border: 1px solid rgba(255, 255, 255, 0.1);
        border-radius: 12px;
        color: white;
        text-decoration: none;
        font-size: 16px;
        font-weight: 500;
        transition: all 0.3s ease;
        position: relative;
        overflow: hidden;
    }
    
    .mobile-nav-item:hover {
        background: rgba(255, 255, 255, 0.1);
        transform: translateY(-2px);
        box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
    }
    
    .mobile-nav-item i {
        margin-right: 15px;
        width: 20px;
        text-align: center;
        font-size: 18px;
    }
    
    .mobile-nav-item span {
        flex: 1;
    }
    
    /* 移动端下拉菜单 */
    .mobile-nav-dropdown {
        flex-direction: column;
        padding: 0;
        background: transparent;
        border: none;
    }
    
    .mobile-nav-dropdown-toggle {
        display: flex;
        align-items: center;
        padding: 18px 20px;
        background: rgba(255, 255, 255, 0.05);
        border: 1px solid rgba(255, 255, 255, 0.1);
        border-radius: 12px;
        color: white;
        cursor: pointer;
        font-size: 16px;
        font-weight: 500;
        transition: all 0.3s ease;
    }
    
    .mobile-nav-dropdown-toggle:hover {
        background: rgba(255, 255, 255, 0.1);
    }
    
    .dropdown-arrow {
        margin-left: auto;
        transition: transform 0.3s ease;
    }
    
    .mobile-nav-dropdown.active .dropdown-arrow {
        transform: rotate(180deg);
    }
    
    .mobile-nav-dropdown-menu {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
        margin-top: 10px;
    }
    
    .mobile-nav-dropdown.active .mobile-nav-dropdown-menu {
        max-height: 300px;
    }
    
    .mobile-nav-subitem {
        display: flex;
        align-items: center;
        padding: 15px 20px 15px 50px;
        background: rgba(255, 255, 255, 0.03);
        border: 1px solid rgba(255, 255, 255, 0.05);
        border-radius: 8px;
        color: rgba(255, 255, 255, 0.8);
        text-decoration: none;
        font-size: 14px;
        transition: all 0.3s ease;
        margin-bottom: 8px;
    }
    
    .mobile-nav-subitem:hover {
        background: rgba(255, 255, 255, 0.08);
        color: white;
    }
    
    .mobile-nav-subitem i {
        margin-right: 12px;
        width: 16px;
        text-align: center;
        font-size: 14px;
    }
    
    /* 桌面端导航样式 */
    .desktop-nav {
        display: flex;
        gap: 25px;
        flex: 1;
        justify-content: center;
        align-items: center;
    }
    
    .desktop-nav a {
        text-decoration: none;
        color: #f8fafc;
        font-weight: 500;
        transition: all 0.3s ease;
        padding: 8px 16px;
        border-radius: 16px;
        position: relative;
        overflow: hidden;
    }
    
    .desktop-nav a::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 50%;
        width: 0;
        height: 2px;
        background: #6366f1;
        transition: all 0.3s ease;
        transform: translateX(-50%);
    }
    
    .desktop-nav a:hover::after {
        width: 70%;
    }
    
    .desktop-nav a:hover {
        color: #c7d2fe;
        background: rgba(255, 255, 255, 0.05);
    }
    
    /* 桌面端下拉菜单 */
    .nav-item {
        position: relative;
    }
    
    .dropdown-toggle {
        cursor: pointer;
        position: relative;
    }
    
    .dropdown-menu {
        position: absolute;
        top: 100%;
        left: 0;
        background: rgba(0, 0, 0, 0.95);
        backdrop-filter: blur(20px);
        border: 1px solid rgba(255, 255, 255, 0.1);
        border-radius: 10px;
        padding: 10px 0;
        min-width: 200px;
        opacity: 0;
        visibility: hidden;
        transform: translateY(-10px);
        transition: all 0.3s ease;
        z-index: 1001;
    }
    
    .dropdown-menu.show {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }
    
    .dropdown-item {
        display: block;
        padding: 10px 20px;
        color: rgba(255, 255, 255, 0.8);
        text-decoration: none;
        transition: all 0.3s ease;
    }
    
    .dropdown-item:hover,
    .dropdown-item.active {
        color: white;
        background: rgba(255, 255, 255, 0.1);
    }
    
    .dropdown-item i {
        margin-right: 10px;
        width: 16px;
        text-align: center;
    }
    
    /* 响应式设计 */
    @media (max-width: 992px) {
        .desktop-nav {
            display: none !important;
        }
        
        .mobile-menu-btn {
            display: flex !important;
        }
    }
    
    @media (min-width: 993px) {
        .desktop-nav {
            display: flex !important;
        }
        
        .mobile-menu-btn {
            display: none !important;
        }
        
        .mobile-nav-overlay {
            display: none !important;
        }
    }
    
    /* 确保桌面端导航始终显示 */
    @media screen and (min-width: 993px) {
        .desktop-nav {
            display: flex !important;
            visibility: visible !important;
            opacity: 1 !important;
        }
    }
    
    /* 移动端样式 - 只保留新的全屏菜单 */
    @media screen and (max-width: 768px) {
        .mobile-menu-btn {
            display: flex !important;
        }
    }
    
    /* 桌面端样式 */
    @media screen and (min-width: 769px) {
        .mobile-menu-btn {
            display: none !important;
        }
        
        .navbar .nav-links {
            position: static !important;
            flex-direction: row !important;
            gap: 25px !important;
            height: auto !important;
            padding: 0 !important;
            transform: none !important;
            background: transparent !important;
            backdrop-filter: none !important;
            justify-content: center !important;
        }
        
        .navbar .nav-links > a {
            padding: 8px 16px !important;
            border-bottom: none !important;
            width: auto !important;
            text-align: left !important;
            display: inline-block !important;
        }
        
        .nav-item {
            width: auto !important;
        }
        
        .dropdown-menu {
            position: absolute !important;
            opacity: 0 !important;
            visibility: hidden !important;
            transform: translateY(-10px) !important;
            background: rgba(0, 0, 0, 0.95) !important;
            margin-top: 0 !important;
        }
        
        .dropdown-menu.show {
            opacity: 1 !important;
            visibility: visible !important;
            transform: translateY(0) !important;
        }
    }