/* ====== 公共CSS部分（导航与底部） ====== */
        :root {
            --primary: #0f1a36;
            --secondary: #1c2b5c;
            --accent: #00b4d8;
            --accent-light: #90e0ef;
            --light: #f8f9ff;
            --dark: #0a0e1f;
            --gradient-primary: linear-gradient(135deg, #0f1a36 0%, #1c2b5c 100%);
            --gradient-accent: linear-gradient(135deg, #00b4d8 0%, #0077b6 100%);
            --shadow: 0 20px 40px rgba(15, 26, 54, 0.08);
            --shadow-hover: 0 30px 60px rgba(15, 26, 54, 0.15);
            --transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.1);
            --border-radius: 16px;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        html {
            scroll-behavior: smooth;
        }
        
        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            color: #333;
            line-height: 1.7;
            background-color: var(--light);
            overflow-x: hidden;
        }
        
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }
        
        /* 导航栏样式 - 现代设计感 */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.2);
            transition: var(--transition);
        }
        
        .header-scrolled {
            box-shadow: 0 10px 30px rgba(15, 26, 54, 0.08);
        }
        
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0;
            transition: var(--transition);
        }
        
        .logo {
            display: flex;
            align-items: center;
            text-decoration: none;
        }
        
        /* 修改：地球图标添加旋转动画 */
        .logo-icon {
            width: 40px;
            height: 40px;
            background: var(--gradient-accent);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.5rem;
            margin-right: 12px;
            animation: rotateEarth 20s linear infinite;
            transition: var(--transition);
        }
        
        @keyframes rotateEarth {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        
        .logo:hover .logo-icon {
            animation: rotateEarth 5s linear infinite;
        }
        
        .logo-text {
            display: flex;
            flex-direction: column;
        }
        
        /* 修改：文字LOGO添加颜色渐变特效 */
        .logo-primary {
            font-size: 1.5rem;
            font-weight: 800;
            line-height: 1.2;
            background: linear-gradient(90deg, #0f1a36, #00b4d8, #1c2b5c, #0077b6);
            background-size: 300% 100%;
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            animation: gradientText 8s ease infinite;
        }
        
        @keyframes gradientText {
            0% { background-position: 0% 50%; }
            50% { background-position: 100% 50%; }
            100% { background-position: 0% 50%; }
        }
        
        .logo-sub {
            font-size: 0.75rem;
            color: var(--accent);
            font-weight: 600;
            letter-spacing: 1px;
        }
        
        .nav-links {
            display: flex;
            list-style: none;
            gap: 36px;
        }
        
        .nav-link {
            text-decoration: none;
            color: var(--primary);
            font-weight: 600;
            font-size: 1rem;
            position: relative;
            padding: 8px 0;
            transition: var(--transition);
        }
        
        .nav-link:after {
            content: '';
            position: absolute;
            width: 0;
            height: 3px;
            background: var(--accent);
            left: 0;
            bottom: 0;
            border-radius: 3px;
            transition: var(--transition);
        }
        
        .nav-link:hover {
            color: var(--accent);
        }
        
        .nav-link:hover:after {
            width: 100%;
        }
        
        .nav-link.active {
            color: var(--accent);
        }
        
        .nav-link.active:after {
            width: 100%;
        }
        
        .nav-cta {
            background: var(--gradient-accent);
            color: white;
            padding: 12px 28px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            box-shadow: 0 8px 20px rgba(0, 180, 216, 0.2);
        }
        
        .nav-cta:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 30px rgba(0, 180, 216, 0.3);
        }
        
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--primary);
            cursor: pointer;
            z-index: 1001;
        }
        
        /* 底部样式 */
        footer {
            background: var(--gradient-primary);
            color: white;
            padding: 80px 0 30px;
            position: relative;
            overflow: hidden;
        }
        
        footer:before {
            content: '';
            position: absolute;
            width: 100%;
            height: 100%;
            top: 0;
            left: 0;
            background: url("data:image/svg+xml,%3Csvg width='100' height='20' viewBox='0 0 100 20' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M21.184 20c.357-.13.72-.264 1.088-.402l1.768-.661C33.64 15.347 39.647 14 50 14c10.271 0 15.362 1.222 24.629 4.928.955.383 1.869.74 2.75 1.072h6.225c-2.51-.73-5.139-1.691-8.233-2.928C65.888 13.278 60.562 12 50 12c-10.626 0-16.855 1.397-26.66 5.063l-1.767.662c-2.475.923-4.66 1.674-6.724 2.275h6.335zm0-20C13.258 2.892 8.077 4 0 4V2c5.744 0 9.951-.574 14.85-2h6.334zM77.38 0C85.239 2.966 90.502 4 100 4V2c-6.842 0-11.386-.542-16.396-2h-6.225zM0 14c8.44 0 13.718-1.21 22.272-4.402l1.768-.661C33.64 5.347 39.647 4 50 4c10.271 0 15.362 1.222 24.629 4.928C84.112 12.722 89.438 14 100 14v-2c-10.271 0-15.362-1.222-24.629-4.928C65.888 3.278 60.562 2 50 2 39.374 2 33.145 3.397 23.34 7.063l-1.767.662C13.223 10.84 8.163 12 0 12v2z' fill='%2300b4d8' fill-opacity='0.05' fill-rule='evenodd'/%3E%3C/svg%3E");
            opacity: 0.3;
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 50px;
            margin-bottom: 60px;
            position: relative;
            z-index: 1;
        }
        
        .footer-column h3 {
            font-size: 1.3rem;
            margin-bottom: 25px;
            position: relative;
            padding-bottom: 15px;
        }
        
        .footer-column h3:after {
            content: '';
            position: absolute;
            width: 40px;
            height: 3px;
            background: var(--accent);
            left: 0;
            bottom: 0;
            border-radius: 3px;
        }
        
        .footer-links {
            list-style: none;
        }
        
        .footer-links li {
            margin-bottom: 14px;
        }
        
        .footer-links a {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
            transition: var(--transition);
            display: inline-block;
        }
        
        .footer-links a:hover {
            color: var(--accent-light);
            transform: translateX(5px);
        }
        
        .footer-contact {
            margin-top: 20px;
        }
        
        .contact-item {
            display: flex;
            align-items: flex-start;
            margin-bottom: 20px;
            color: rgba(255, 255, 255, 0.9);
        }
        
        .contact-icon {
            width: 40px;
            height: 40px;
            background: rgba(0, 180, 216, 0.2);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 15px;
            color: var(--accent-light);
            flex-shrink: 0;
        }
        
        .contact-text {
            flex: 1;
        }
        
        .contact-text strong {
            display: block;
            margin-bottom: 5px;
        }
        
        .qr-container {
            background: white;
            padding: 15px;
            border-radius: 12px;
            display: inline-block;
            margin-top: 15px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        }
        
        .qr-code {
            width: 120px;
            height: 120px;
        }
        
        .qr-code img {
            width: 100%;
            height: 100%;
            object-fit: contain;
        }
        
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 30px;
            text-align: center;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            position: relative;
            z-index: 1;
        }
        
        .footer-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
            margin-bottom: 10px;
            display: inline-block;
        }
        
        /* 响应式导航 */
        @media (max-width: 992px) {
            .nav-links {
                position: fixed;
                top: 0;
                right: -100%;
                width: 300px;
                height: 100vh;
                background: white;
                flex-direction: column;
                padding: 100px 40px 40px;
                box-shadow: -10px 0 40px rgba(15, 26, 54, 0.1);
                transition: var(--transition);
                z-index: 1000;
            }
            
            .nav-links.active {
                right: 0;
            }
            
            .mobile-menu-btn {
                display: block;
            }
            
            .nav-cta {
                display: none;
            }
        }