:root {
            --primary: #0066ff;
            --primary-dark: #0052d4;
            --secondary: #00d4ff;
            --accent: #7928ca;
            --success: #10b981;
            --warning: #f59e0b;
            --dark: #0f172a;
            --dark-light: #1e293b;
            --light: #f8fafc;
            --gray: #94a3b8;
            --border: #334155;
            --radius: 12px;
            --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.2);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        html {
            scroll-behavior: smooth;
        }
        
        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            background-color: var(--dark);
            color: var(--light);
            line-height: 1.6;
            overflow-x: hidden;
        }
        
        h1, h2, h3, h4, h5, h6 {
            font-family: 'Montserrat', sans-serif;
            font-weight: 700;
            line-height: 1.2;
        }
        
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        section {
            padding: 100px 0;
        }
        
        a {
            text-decoration: none;
            color: inherit;
        }
        
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 16px 32px;
            border-radius: var(--radius);
            font-family: 'Montserrat', sans-serif;
            font-weight: 600;
            font-size: 16px;
            cursor: pointer;
            transition: var(--transition);
            border: none;
            gap: 10px;
            white-space: nowrap;
        }
        
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: white;
        }
        
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }
        
        .btn-outline {
            background: transparent;
            border: 2px solid var(--primary);
            color: var(--primary);
        }
        
        .btn-outline:hover {
            background: rgba(0, 102, 255, 0.1);
        }
        
        .btn-success {
            background: var(--success);
            color: white;
        }
        
        .btn-success:hover {
            background: #0da271;
            transform: translateY(-3px);
        }
        
        .section-title {
            font-size: 3.2rem;
            font-weight: 800;
            margin-bottom: 20px;
            position: relative;
        }
        
        .section-title:after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 0;
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 2px;
            right: 0px;
             margin: auto;
        }
        
        .section-subtitle {
            font-size: 1rem;
            color: var(--gray);
            margin-bottom: 50px;
        }
        
        .text-center {
            text-align: center;
        }
        
        .text-center .section-title:after {
            left: 50%;
            transform: translateX(-50%);
        }
        
        /* 导航栏 */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            padding: 20px 0;
            background: rgba(15, 23, 42, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            transition: var(--transition);
        }
        
        header.scrolled {
            padding: 15px 0;
            box-shadow: var(--shadow);
        }
        
        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 1.8rem;
            font-weight: 900;
        }
        
        .logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1;
        }
        
        .logo-text span:first-child {
            font-size: 1.8rem;
        }
        
        .logo-text span:last-child {
            font-size: 0.7rem;
            color: var(--secondary);
            font-weight: 400;
            margin-top:2px;
        }
        
        .nav-links {
            display: flex;
            list-style: none;
            gap: 40px;
        }
        
        .nav-links a {
            font-weight: 600;
            position: relative;
            padding: 5px 0;
        }
        
        .nav-links a:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            transition: var(--transition);
        }
        
        .nav-links a:hover:after {
            width: 100%;
        }
        
        .nav-cta {
            display: flex;
            align-items: center;
            gap: 20px;
        }
        
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--light);
            font-size: 1.5rem;
            cursor: pointer;
        }
        
        /* 英雄区域 */
        .hero {
            padding-top: 180px;
            position: relative;
            overflow: hidden;
        }
        
        .hero:before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(circle at 70% 30%, rgba(0, 102, 255, 0.1) 0%, transparent 50%);
            z-index: -1;
        }
        
        .hero-content {
            max-width: 800px;
        }
        
        .hero-title {
            font-size: 4rem;
            font-weight: 900;
            margin-bottom: 24px;
            line-height: 1.1;
        }
        
        .hero-title span {
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        
        .hero-text {
            font-size: 1.1rem;
            color: var(--gray);
            margin-bottom: 40px;
            max-width: 700px;
              text-align: justify;

        }
        
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            margin-bottom: 60px;
        }
        
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 50px;
        }
        
        .stat-item h3 {
            font-size: 2.8rem;
            font-weight: 800;
            margin-bottom: 5px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        
        .stat-item p {
            color: var(--gray);
            font-size: 0.9rem;
        }
        
        .hero-visual {
            position: absolute;
            right: 0;
            top: 150px;
            width: 45%;
            height: 500px;
        }
        
        .hero-card {
            position: absolute;
            background: var(--dark-light);
            border-radius: 20px;
            padding: 25px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            width: 320px;
            transition: var(--transition);
        }
        
        .hero-card:hover {
            transform: translateY(-10px);
            border-color: var(--primary);
        }
        
        .card-1 {
            top: 0;
            right: 10%;
            animation: float 8s ease-in-out infinite;
        }
        
        .card-2 {
            top: 333px;
            right: 5%;
            animation: float 8s ease-in-out infinite 1s;
        }
        
        .card-3 {
            top: 198px;
            right: 30%;
            animation: float 8s ease-in-out infinite 2s;
        }
        
        .hero-card-icon {
            width: 50px;
            height: 50px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            font-size: 1.3rem;
        }
        
        .hero-card h4 {
            font-size: 1.2rem;
            margin-bottom: 10px;
        }
        
        .hero-card p {
            color: var(--gray);
            font-size: 0.9rem;
        }
        
        @keyframes float {
            0%, 100% { transform: translateY(0) rotate(var(--rotate, 0deg)); }
            50% { transform: translateY(-20px) rotate(var(--rotate, 0deg)); }
        }
        
        /* 服务部分 */
        .services {
            background: var(--dark-light);
        }
        
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 30px;
        }
        
        .service-card {
            background: var(--dark);
            border-radius: 20px;
            padding: 40px 30px;
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        
        .service-card:hover {
            transform: translateY(-10px);
            border-color: var(--primary);
            box-shadow: var(--shadow-lg);
        }
        
        .service-icon {
            width: 70px;
            height: 70px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 25px;
            font-size: 1.8rem;
        }
        
        .service-card h3 {
            font-size: 1.5rem;
            margin-bottom: 15px;
        }
        
        .service-card p {
            color: var(--gray);
            margin-bottom: 20px;
        }
        
        .service-features {
            list-style: none;
            margin-top: 20px;
        }
        
        .service-features li {
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--gray);
            font-size: 0.9rem;
        }
        
        .service-features i {
            color: var(--success);
        }
        
        /* 案例研究 */
        .case-studies {
            background: var(--dark);
        }
        
        .case-tabs {
            display: flex;
            justify-content: center;
            gap: 10px;
            margin-bottom: 50px;
            flex-wrap: wrap;
        }
        
        .case-tab {
            padding: 12px 24px;
            background: var(--dark-light);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            cursor: pointer;
            transition: var(--transition);
            font-weight: 600;
        }
        
        .case-tab.active, .case-tab:hover {
            background: var(--primary);
            border-color: var(--primary);
        }
        
        .case-content {
            display: none;
        }
        
        .case-content.active {
            display: block;
            animation: fadeIn 0.5s ease;
        }
        
        .case-study {
            background: linear-gradient(135deg, rgba(0, 102, 255, 0.1), rgba(121, 40, 202, 0.1));
            border-radius: 20px;
            padding: 20px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }
        
        .case-results {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
            margin-top: 30px;
        }
        
        .result-item {
            background: rgba(255, 255, 255, 0.05);
            border-radius: 12px;
            padding: 20px;
            text-align: center;
        }
        
        .result-item h4 {
            font-size: 2rem;
            color: var(--secondary);
            margin-bottom: 5px;
        }
        
        .result-item p {
            color: var(--gray);
            font-size: 0.9rem;
        }
        
        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }
        
        /* 定价部分 */
        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }
        
        .pricing-card {
            background: var(--dark-light);
            border-radius: 20px;
            padding: 40px 30px;
            border: 1px solid var(--border);
            transition: var(--transition);
            position: relative;
        }
        
        .pricing-card.popular {
            border-color: var(--primary);
            transform: scale(1.05);
        }
        
        .pricing-card:hover {
            transform: translateY(-10px);
            border-color: var(--primary);
        }
        
        .pricing-card.popular:hover {
            transform: translateY(-10px) scale(1.05);
        }
        
        .popular-badge {
            position: absolute;
            top: -12px;
            left: 50%;
            transform: translateX(-50%);
            background: linear-gradient(90deg, var(--primary), var(--accent));
            color: white;
            padding: 6px 20px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 700;
        }
        
        .pricing-header {
            margin-bottom: 30px;
            text-align: center;
        }
        
        .pricing-name {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        
        .pricing-price {
            font-size: 3.5rem;
            font-weight: 900;
            margin-bottom: 5px;
        }
        
        .pricing-period {
            color: var(--gray);
        }
        
        .pricing-features {
            list-style: none;
            margin-bottom: 30px;
        }
        
        .pricing-features li {
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .pricing-features i {
            color: var(--success);
        }
        
        /* CTA部分 */
        .cta {
            background: linear-gradient(135deg, var(--primary-dark), var(--accent));
            border-radius: 30px;
            padding: 80px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        
        .cta:before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><rect width="100" height="100" fill="none"/><path d="M0,50 Q25,30 50,50 T100,50" stroke="rgba(255,255,255,0.1)" stroke-width="2" fill="none"/></svg>');
            opacity: 0.2;
        }
        
        .cta h2 {
            font-size: 3rem;
            margin-bottom: 20px;
            position: relative;
            z-index: 1;
        }
        
        .cta p {
            font-size: 1rem;
            margin-bottom: 40px;
            opacity: 0.9;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
            position: relative;
            z-index: 1;
        }
        
        /* 表单部分 */
        .contact-form {
            background: var(--dark-light);
            border-radius: 20px;
            padding: 50px;
        }
        
        .form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-bottom: 20px;
        }
        
        .form-group {
            margin-bottom: 20px;
        }
        
        .form-group.full-width {
            grid-column: 1 / -1;
        }
        
        .form-label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
        }
        
        .form-input, .form-textarea {
            width: 100%;
            padding: 16px;
            background: var(--dark);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            color: var(--light);
            font-family: inherit;
            transition: var(--transition);
        }
        
        .form-input:focus, .form-textarea:focus {
            outline: none;
            border-color: var(--primary);
        }
        
        .form-textarea {
            min-height: 150px;
            resize: vertical;
        }
        
        /* 页脚 */
        footer {
            background: #070a12;
            padding: 80px 0 40px;
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 50px;
            margin-bottom: 60px;
        }
        
        .footer-about p {
            color: var(--gray);
            margin: 20px 0;
        }
        
        .footer-links h4 {
            font-size: 1.2rem;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }
        
        .footer-links h4:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 30px;
            height: 2px;
            background: var(--primary);
        }
        
        .footer-links ul {
            list-style: none;
        }
        
        .footer-links li {
            margin-bottom: 12px;
        }
        
        .footer-links a {
            color: var(--gray);
            transition: var(--transition);
        }
        
        .footer-links a:hover {
            color: var(--primary);
        }
        
        .social-links {
            display: flex;
            gap: 15px;
            margin-top: 20px;
        }
        
        .social-links a {
            width: 40px;
            height: 40px;
            background: var(--dark);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--gray);
            transition: var(--transition);
        }
        
        .social-links a:hover {
            background: var(--primary);
            color: white;
            transform: translateY(-3px);
        }
        
        .copyright {
            text-align: center;
            padding-top: 40px;
            border-top: 1px solid var(--border);
            color: var(--gray);
            font-size: 0.9rem;
        }
        
        /* 响应式设计 */
        @media (max-width: 1200px) {
            .hero-visual {
                position: relative;
                width: 100%;
                height: 400px;
                margin-top: 60px;
                top: 0;
            }
            
            .hero-card {
                position: relative;
                margin: 0 auto 20px;
                transform: none !important;
            }
            
            .case-study {
                grid-template-columns: 1fr;
            }
        }
        
        @media (max-width: 992px) {
            .section-title {
                font-size: 2.5rem;
            }
            
            .hero-title {
                font-size: 3rem;
            }
            
            .nav-links, .nav-cta .btn-outline {
                display: none;
            }
            
            .mobile-toggle {
                display: block;
            }
            
            .form-grid {
                grid-template-columns: 1fr;
            }
            
            .pricing-card.popular {
                transform: none;
            }
            
            .pricing-card.popular:hover {
                transform: translateY(-10px);
            }
        }
        
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }
            
            .section-title {
                font-size: 2.2rem;
            }
            
            .hero-actions {
                flex-direction: column;
            }
            
            .btn {
                width: 100%;
                justify-content: center;
            }
            
            .hero-stats {
                justify-content: center;
            }
            
            .services-grid, .pricing-grid {
                grid-template-columns: 1fr;
            }
            
            .contact-form {
                padding: 30px 20px;
            }
            
            section {
                padding: 70px 0;
            }
            
            .cta {
                padding: 50px 20px;
            }
            
            .cta h2 {
                font-size: 2.2rem;
            }
        }
        
        @media (max-width: 480px) {
            .hero-visual{display:none}
            .hero-title {
                font-size: 2rem;
            }
            
            .section-title {
                font-size: 1.8rem;
            }
            
            .case-tabs {
                flex-direction: column;
            }
            
            .case-tab {
                text-align: center;
            }
        }