@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');
        
        :root {
            --primary-color: #1e3a8a;
            --secondary-color: #3b82f6;
            --accent-color: #f97316;
            --success-color: #10b981;
            --warning-color: #f59e0b;
            --danger-color: #ef4444;
            --light-bg: #f8fafc;
            --dark-text: #1e293b;
            --medium-text: #64748b;
            --light-text: #94a3b8;
        }
        
        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            scroll-behavior: smooth;
        }
        
        .gradient-bg {
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
        }
        
        .gradient-text {
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        
        .accent-gradient {
            background: linear-gradient(135deg, var(--accent-color) 0%, #ea580c 100%);
        }
        
        .card {
            background: white;
            border-radius: 16px;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
            transition: all 0.3s ease;
            overflow: hidden;
        }
        
        .card:hover {
            transform: translateY(-8px);
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
        }
        
        .btn-primary {
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
            color: white;
            padding: 12px 24px;
            border-radius: 12px;
            font-weight: 600;
            text-decoration: none;
            display: inline-block;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
            position: relative;
            overflow: hidden;
        }
        
        .btn-primary::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
            transition: left 0.5s;
        }
        
        .btn-primary:hover::before {
            left: 100%;
        }
        
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 35px rgba(59, 130, 246, 0.3);
        }
        
        .btn-secondary {
            background: white;
            color: var(--primary-color);
            padding: 12px 24px;
            border-radius: 12px;
            font-weight: 600;
            text-decoration: none;
            display: inline-block;
            transition: all 0.3s ease;
            border: 2px solid var(--primary-color);
            cursor: pointer;
        }
        
        .btn-secondary:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 10px 30px rgba(59, 130, 246, 0.2);
        }
        
        .btn-accent {
            background: linear-gradient(135deg, var(--accent-color) 0%, #ea580c 100%);
            color: white;
            padding: 12px 24px;
            border-radius: 12px;
            font-weight: 600;
            text-decoration: none;
            display: inline-block;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
        }
        
        .btn-accent:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 35px rgba(249, 115, 22, 0.3);
        }
        
        .nav-link {
            color: var(--dark-text);
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s ease;
            position: relative;
            padding: 8px 16px;
            border-radius: 8px;
        }
        
        .nav-link:hover {
            color: var(--primary-color);
            background: rgba(59, 130, 246, 0.1);
        }
        
        .nav-link.active {
            color: var(--primary-color);
            background: rgba(59, 130, 246, 0.1);
        }
        
        .hero-section {
            background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
            position: relative;
            overflow: hidden;
        }
        
        .hero-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -50%;
            width: 100%;
            height: 200%;
            background: radial-gradient(circle, rgba(59, 130, 246, 0.1) 0%, transparent 70%);
            animation: rotate 20s linear infinite;
        }
        
        @keyframes rotate {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        
        .hero-content {
            position: relative;
            z-index: 1;
        }
        
        .feature-icon {
            width: 60px;
            height: 60px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin-bottom: 20px;
            transition: all 0.3s ease;
        }
        
        .feature-card:hover .feature-icon {
            transform: scale(1.1);
        }
        
        .stat-number {
            font-size: 48px;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 8px;
        }
        
        .stat-label {
            color: var(--medium-text);
            font-weight: 500;
        }
        
        .process-step {
            display: flex;
            align-items: center;
            margin: 40px 0;
            position: relative;
        }
        
        .process-step::before {
            content: '';
            position: absolute;
            left: 30px;
            top: 80px;
            width: 2px;
            height: calc(100% + 40px);
            background: #e2e8f0;
        }
        
        .process-step:last-child::before {
            display: none;
        }
        
        .step-number {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 24px;
            margin-right: 30px;
            z-index: 1;
            box-shadow: 0 10px 30px rgba(59, 130, 246, 0.3);
        }
        
        .step-content {
            flex: 1;
        }
        
        .step-title {
            font-size: 20px;
            font-weight: 600;
            color: var(--dark-text);
            margin-bottom: 12px;
        }
        
        .step-description {
            color: var(--medium-text);
            line-height: 1.7;
            font-size: 16px;
        }
        
        .testimonial-card {
            background: white;
            border-radius: 20px;
            padding: 40px;
            box-shadow: 0 15px 45px rgba(0, 0, 0, 0.1);
            position: relative;
            margin: 20px;
        }
        
        .testimonial-card::before {
            content: '"';
            position: absolute;
            top: 20px;
            left: 30px;
            font-size: 80px;
            color: rgba(59, 130, 246, 0.1);
            font-family: Georgia, serif;
            line-height: 1;
        }
        
        .testimonial-avatar {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            margin-right: 20px;
            object-fit: cover;
        }
        
        .testimonial-author {
            font-weight: 600;
            color: var(--dark-text);
            margin-bottom: 4px;
        }
        
        .testimonial-role {
            color: var(--medium-text);
            font-size: 14px;
        }
        
        .pricing-card {
            background: white;
            border-radius: 20px;
            padding: 40px;
            text-align: center;
            box-shadow: 0 15px 45px rgba(0, 0, 0, 0.1);
            position: relative;
            transition: all 0.3s ease;
            border: 2px solid transparent;
        }
        
        .pricing-card.featured {
            border-color: var(--primary-color);
            transform: scale(1.05);
        }
        
        .pricing-card.featured::before {
            content: '推荐';
            position: absolute;
            top: -12px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--primary-color);
            color: white;
            padding: 8px 24px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 600;
        }
        
        .pricing-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 25px 60px rgba(0, 0, 0, 0.15);
        }
        
        .pricing-card.featured:hover {
            transform: scale(1.05) translateY(-10px);
        }
        
        .pricing-price {
            font-size: 48px;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 8px;
        }
        
        .pricing-period {
            color: var(--medium-text);
            margin-bottom: 30px;
        }
        
        .pricing-features {
            list-style: none;
            padding: 0;
            margin: 30px 0;
            text-align: left;
        }
        
        .pricing-features li {
            padding: 12px 0;
            border-bottom: 1px solid #f1f5f9;
            display: flex;
            align-items: center;
        }
        
        .pricing-features li:last-child {
            border-bottom: none;
        }
        
        .pricing-features i {
            color: var(--success-color);
            margin-right: 12px;
        }
        
        .faq-item {
            border-bottom: 1px solid #e2e8f0;
            padding: 24px 0;
        }
        
        .faq-question {
            font-size: 18px;
            font-weight: 600;
            color: var(--dark-text);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: color 0.3s ease;
        }
        
        .faq-question:hover {
            color: var(--primary-color);
        }
        
        .faq-answer {
            color: var(--medium-text);
            line-height: 1.7;
            margin-top: 16px;
            display: none;
        }
        
        .faq-answer.active {
            display: block;
            animation: fadeIn 0.3s ease;
        }
        
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(-10px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        .contact-info {
            display: flex;
            align-items: center;
            margin: 20px 0;
        }
        
        .contact-info i {
            width: 50px;
            height: 50px;
            border-radius: 12px;
            background: rgba(59, 130, 246, 0.1);
            color: var(--primary-color);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-right: 20px;
        }
        
        .contact-info-content h4 {
            font-weight: 600;
            color: var(--dark-text);
            margin-bottom: 4px;
        }
        
        .contact-info-content p {
            color: var(--medium-text);
        }
        
        .social-link {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(59, 130, 246, 0.1);
            color: var(--primary-color);
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            margin: 0 8px;
            transition: all 0.3s ease;
        }
        
        .social-link:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-3px);
        }
        
        .footer {
            background: var(--dark-text);
            color: white;
            padding: 80px 0 40px;
        }
        
        .footer-logo {
            display: flex;
            align-items: center;
            margin-bottom: 30px;
        }
        
        .footer-logo img {
            width: 50px;
            height: 50px;
            margin-right: 15px;
        }
        
        .footer-logo span {
            font-size: 24px;
            font-weight: 700;
            color: white;
        }
        
        .footer-section h3 {
            color: white;
            font-weight: 600;
            margin-bottom: 20px;
            position: relative;
            padding-left: 20px;
        }
        
        .footer-section h3::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 20px;
            background: var(--primary-color);
            border-radius: 2px;
        }
        
        .footer-section ul {
            list-style: none;
            padding: 0;
        }
        
        .footer-section ul li {
            margin-bottom: 12px;
        }
        
        .footer-section ul li a {
            color: #94a3b8;
            text-decoration: none;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
        }
        
        .footer-section ul li a:hover {
            color: white;
            padding-left: 8px;
        }
        
        .footer-section ul li a i {
            margin-right: 10px;
            color: var(--primary-color);
        }
        
        .footer-bottom {
            border-top: 1px solid #334155;
            padding-top: 30px;
            margin-top: 50px;
            text-align: center;
            color: #94a3b8;
        }
        
        .footer-bottom a {
            color: var(--primary-color);
            text-decoration: none;
        }
        
        .footer-bottom a:hover {
            text-decoration: underline;
        }
        
        /* 响应式设计 */
        @media (max-width: 768px) {
            .hero-content h1 {
                font-size: 36px;
            }
            
            .stat-number {
                font-size: 36px;
            }
            
            .process-step {
                flex-direction: column;
                text-align: center;
            }
            
            .step-number {
                margin-right: 0;
                margin-bottom: 20px;
            }
            
            .process-step::before {
                display: none;
            }
            
            .pricing-card.featured {
                transform: none;
            }
            
            .pricing-card.featured:hover {
                transform: translateY(-10px);
            }
        }
        
        /* 加载动画 */
        .loader {
            width: 48px;
            height: 48px;
            border: 5px solid var(--primary-color);
            border-bottom-color: transparent;
            border-radius: 50%;
            display: inline-block;
            box-sizing: border-box;
            animation: rotation 1s linear infinite;
        }
        
        @keyframes rotation {
            0% {
                transform: rotate(0deg);
            }
            100% {
                transform: rotate(360deg);
            }
        }
        
        /* 滚动动画 */
        .fade-in {
            opacity: 0;
            transform: translateY(30px);
            transition: all 0.6s ease;
        }
        
        .fade-in.visible {
            opacity: 1;
            transform: translateY(0);
        }
        
        /* 数字滚动动画 */
        .counter {
            display: inline-block;
        }
        
        /* 3D效果 */
        .card-3d {
            transform-style: preserve-3d;
            transition: transform 0.6s;
        }
        
        .card-3d:hover {
            transform: rotateY(10deg) rotateX(5deg);
        }
        
        .card-3d::before {
            content: '';
            position: absolute;
            inset: 0;
            border-radius: 16px;
            padding: 2px;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color), var(--accent-color));
            -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            -webkit-mask-composite: xor;
            mask-composite: exclude;
            pointer-events: none;
        }