* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            background: linear-gradient(135deg, #1a3a5f 0%, #2c5282 100%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            color: #fff;
        }
        /* Top Bar Container */
        .xnair-top-bar { /* Added a more specific class to reduce potential conflicts */
            background-color: #4b5563; /* Darker grey background for better contrast */
            color: #ffffff; /* White text color */
            padding: 8px 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap; /* Allow items to wrap on smaller screens if needed */
            /*position: fixed; */
            top: 0; /* Position at the very top */
            left: 0; /* Ensure it spans from the left edge */
            width: 100%; /* Take full width */
            z-index: 9999; /* Increased z-index to ensure it stays above most other content, including other fixed/sticky navs */
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1); /* Optional: Add a subtle shadow */
            box-sizing: border-box; /* Include padding in the element's total width and height */
            height: 40px; /* Explicitly set height for easier padding calculation */
            padding: 0 5%;
        }

        /* Hide top bar on mobile devices */
        @media (max-width: 768px) {
            .xnair-top-bar {
                display: none;
            }
        }

        /* Welcome Message */
        .xnair-welcome-message { /* Added a more specific class */
            font-size: 14px;
            font-weight: 500;
            margin-right: 20px; /* Space between message and contacts */
        }

        /* Contact Information Container */
        .xnair-contact-info { /* Added a more specific class */
            display: flex;
            align-items: center;
            gap: 20px; /* Space between phone and WhatsApp */
        }

        /* Individual Contact Link */
        .xnair-contact-link { /* Added a more specific class */
            display: flex;
            align-items: center;
            color: #ffffff; /* White text color for links */
            text-decoration: none;
            font-size: 14px;
            font-weight: 500;
            transition: color 0.3s ease, background-color 0.3s ease;
            border-radius: 6px; /* Slightly rounded for hover effect */
            padding: 4px 8px;
        }

        .xnair-contact-link:hover {
            color: #e5e7eb; /* Slightly lighter white on hover */
            background-color: rgba(255, 255, 255, 0.1); /* Subtle white background on hover */
        }

        /* Image Icon Styling */
        .xnair-contact-link img { /* Added a more specific class */
            width: 18px; /* Fixed width for the icon */
            height: 18px; /* Fixed height for the icon */
            margin-right: 8px;
            object-fit: contain; /* Ensures the entire image is visible within the bounds */
            flex-shrink: 0; /* Prevents the image from shrinking */
        }
        .your-floating-nav { /* This is a placeholder, use your actual nav's class or ID */
            position: fixed; /* Or 'sticky', but 'fixed' is often more predictable for this scenario */
            top: 40px; /* This MUST be the height of the .xnair-top-bar (40px) */
            width: 100%; /* Ensure it spans the full width */
            z-index: 9998; /* This MUST be lower than .xnair-top-bar's z-index (9999) but higher than regular content */
            background-color: #fff; /* Example background, use your nav's actual background */
            box-shadow: 0 2px 5px rgba(0,0,0,0.1); /* Example shadow */
            /* Add your existing navigation's other styles here (e.g., height, padding, etc.) */
        }
        
        .content {
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            padding: 20px;
            text-align: center;
        }
        
        .content h1 {
            font-size: 3.5rem;
            margin-bottom: 20px;
            text-shadow: 0 2px 8px rgba(0,0,0,0.3);
        }
        
        .content p {
            font-size: 1.2rem;
            max-width: 700px;
            margin-bottom: 30px;
            line-height: 1.8;
        }
        
        .highlight {
            background: rgba(77, 192, 255, 0.2);
            padding: 10px 20px;
            border-radius: 30px;
            display: inline-block;
            margin: 30px 0;
        }
        
        .features {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 20px;
            margin-top: 30px;
            max-width: 1000px;
        }
        
        .feature {
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(10px);
            border-radius: 10px;
            padding: 20px;
            width: 220px;
            transition: all 0.3s ease;
        }
        
        .feature:hover {
            transform: translateY(-5px);
            background: rgba(77, 192, 255, 0.25);
        }
        
        .feature i {
            font-size: 2.5rem;
            color: #4dc0ff;
            margin-bottom: 15px;
        }
        
        /* 导航栏样式 - 重点优化部分 */
        .xn-header {
            /*position: sticky;*/
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.95);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
            z-index: 1000;
            padding: 0 5%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 80px;
            transition: all 0.3s ease;
        }
        
        /* Logo 样式 */
        .xn-logo {
            display: flex;
            align-items: center;
            height: 100%;
        }
        
        .xn-logo a {
            display: flex;
            align-items: center;
            height: 100%;
        }
        
        .xn-logo img {
            height: 65px;
            transition: all 0.3s ease;
            /*filter: drop-shadow(0 2px 4px rgba(0,0,0,0.2));*/
        }
        
        /* 导航菜单 */
        .xn-nav {
            display: flex;
            align-items: center;
            height: 100%;
        }
        
        .xn-nav-links {
            display: flex;
            list-style: none;
            height: 100%;
        }
        
        .xn-nav-links li {
            position: relative;
            height: 100%;
            display: flex;
            align-items: center;
        }
        
        .xn-nav-links li a {
            color: #1a3a5f;
            text-decoration: none;
            font-size: 15px;
            font-weight: 600;
            padding: 0 18px;
            height: 100%;
            display: flex;
            align-items: center;
            transition: all 0.3s ease;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        
        .xn-nav-links li a:hover {
            color: #4dc0ff;
            background: rgba(26, 58, 95, 0.05);
        }
        
        .xn-nav-links li a.active {
            color: #4dc0ff;
            background: rgba(77, 192, 255, 0.1);
        }
        
        .xn-nav-links li a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: #4dc0ff;
            border-radius: 2px 2px 0 0;
        }
        
        /* 移动端菜单按钮 */
        .xn-menu-toggle {
            display: none;
            flex-direction: column;
            justify-content: space-around;
            width: 32px;
            height: 26px;
            background: transparent;
            border: none;
            cursor: pointer;
            padding: 0;
            z-index: 10;
        }
        
        .xn-menu-toggle span {
            width: 100%;
            height: 3px;
            background: #1a3a5f;
            border-radius: 2px;
            transition: all 0.3s ease;
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .xn-nav-links {
                position: fixed;
                top: 0;
                right: -100%;
                width: 280px;
                height: 100vh;
                background: rgba(255, 255, 255, 0.98);
                flex-direction: column;
                padding: 100px 0 40px;
                transition: all 0.4s ease;
                box-shadow: -5px 0 25px rgba(0, 0, 0, 0.15);
                z-index: 5;
            }
            
            .xn-nav-links.active {
                right: 0;
            }
            
            .xn-nav-links li {
                width: 100%;
                height: auto;
                margin: 0;
            }
            
            .xn-nav-links li a {
                padding: 15px 30px;
                font-size: 16px;
                height: auto;
            }
            
            .xn-nav-links li a.active::after {
                height: 100%;
                width: 4px;
                left: 0;
                top: 0;
            }
            
            .xn-menu-toggle {
                display: flex;
            }
            
            .xn-menu-toggle.active span:nth-child(1) {
                transform: rotate(45deg) translate(6px, 6px);
            }
            
            .xn-menu-toggle.active span:nth-child(2) {
                opacity: 0;
            }
            
            .xn-menu-toggle.active span:nth-child(3) {
                transform: rotate(-45deg) translate(6px, -6px);
            }
            
            .content h1 {
                font-size: 2.5rem;
            }
        }
        
        footer {
            background: rgba(0, 0, 0, 0.2);
            text-align: center;
            padding: 20px;
            font-size: 0.9rem;
            margin-top: auto;
        }
        
        /* 动画效果 */
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        .content > * {
            animation: fadeIn 0.8s ease-out forwards;
        }
        
        .content h1 { animation-delay: 0.2s; }
        .content p { animation-delay: 0.4s; }
        .highlight { animation-delay: 0.6s; }
        .features { animation-delay: 0.8s; }