:root {
            --primary-green: #0a8c6f;
            --secondary-green: #0cbf97;
            --dark-green: #075e49;
            --light-green: #e6f7f2;
            --tech-blue: #2a7de1;
            --dark-bg: #0f172a;
            --light-bg: #f8fafc;
            --text-dark: #1e293b;
            --text-light: #64748b;
            --accent-gold: #fbbf24;
            --transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.1);
            --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.08);
            --shadow-sm: 0 10px 20px rgba(0, 0, 0, 0.04);
            --border-radius: 12px;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Noto Sans SC', sans-serif;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            background-color: var(--light-bg);
            color: var(--text-dark);
            line-height: 1.6;
            overflow-x: hidden;
        }

        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 科技感背景元素 */
        .tech-bg {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -2;
            background: radial-gradient(circle at 20% 80%, rgba(10, 140, 111, 0.05) 0%, transparent 50%),
                        radial-gradient(circle at 80% 20%, rgba(42, 125, 225, 0.03) 0%, transparent 50%);
        }

        .grid-bg {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: 
                linear-gradient(rgba(10, 140, 111, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(10, 140, 111, 0.03) 1px, transparent 1px);
            background-size: 50px 50px;
            z-index: -1;
            opacity: 0.3;
        }

        /* 头部区域 */
        header {
            position: relative;
            background: linear-gradient(135deg, var(--dark-bg) 0%, #1a2c47 100%);
            color: white;
            padding: 30px 0;
            overflow: hidden;
        }

        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            position: relative;
            z-index: 2;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .logo-icon {
            width: 60px;
            height: 60px;
            background: linear-gradient(135deg, var(--primary-green), var(--secondary-green));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            box-shadow: var(--shadow-lg);
        }

        .logo-text h1 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 5px;
            letter-spacing: 1px;
        }

        .logo-text p {
            font-size: 0.9rem;
            opacity: 0.8;
            color: var(--light-green);
        }

        .nav-links {
            display: flex;
            gap: 30px;
        }

        .nav-links a {
            color: white;
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
            position: relative;
            padding: 5px 0;
        }

        .nav-links a:hover {
            color: var(--secondary-green);
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--secondary-green);
            transition: var(--transition);
        }

        .nav-links a:hover::after {
            width: 100%;
        }

        .mobile-nav-toggle {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }

        /* 英雄区域 */
        .hero {
            padding: 100px 0 80px;
            position: relative;
            overflow: hidden;
        }

        .hero-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

        .hero-text h2 {
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 20px;
            background: linear-gradient(to right, var(--primary-green), var(--secondary-green));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .hero-text p {
            font-size: 1.2rem;
            color: var(--text-light);
            margin-bottom: 30px;
            max-width: 500px;
        }

        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 40px;
        }

        .stat-item {
            text-align: center;
        }

        .stat-value {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--primary-green);
            display: block;
            line-height: 1;
        }

        .stat-label {
            font-size: 0.9rem;
            color: var(--text-light);
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .hero-visual {
            position: relative;
        }

        .tech-card {
            background: white;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow-lg);
            padding: 30px;
            position: relative;
            overflow: hidden;
            border: 1px solid rgba(10, 140, 111, 0.1);
        }

        .tech-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 5px;
            height: 100%;
            background: linear-gradient(to bottom, var(--primary-green), var(--secondary-green));
        }

        .tech-card h3 {
            font-size: 1.5rem;
            margin-bottom: 15px;
            color: var(--primary-green);
        }

        .floating-element {
            position: absolute;
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, rgba(10, 140, 111, 0.1), rgba(42, 125, 225, 0.1));
            border-radius: 20px;
            z-index: -1;
            animation: float 6s ease-in-out infinite;
        }

        .floating-element:nth-child(1) {
            top: -20px;
            right: -20px;
            animation-delay: 0s;
        }

        .floating-element:nth-child(2) {
            bottom: 30px;
            left: -30px;
            animation-delay: 2s;
        }

        @keyframes float {
            0%, 100% { transform: translateY(0) rotate(0deg); }
            50% { transform: translateY(-20px) rotate(5deg); }
        }

        /* 内容区域通用样式 */
        .section {
            padding: 80px 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 60px;
        }

        .section-header h2 {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--dark-green);
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
        }

        .section-header h2::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: linear-gradient(to right, var(--primary-green), var(--secondary-green));
            border-radius: 2px;
        }

        .section-header p {
            font-size: 1.1rem;
            color: var(--text-light);
            max-width: 700px;
            margin: 0 auto;
        }

        /* 关于我们 */
        .about-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

        .about-image {
            position: relative;
        }

        .about-image img {
            width: 100%;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow-lg);
        }

        .image-badge {
            position: absolute;
            bottom: -20px;
            right: -20px;
            background: linear-gradient(135deg, var(--primary-green), var(--secondary-green));
            color: white;
            padding: 20px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow-lg);
            width: 200px;
        }

        .image-badge h4 {
            font-size: 1.5rem;
            margin-bottom: 5px;
        }

        .about-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 25px;
            margin-top: 40px;
        }

        .feature-item {
            background: white;
            padding: 20px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border-left: 4px solid var(--primary-green);
        }

        .feature-item:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
        }

        .feature-icon {
            width: 50px;
            height: 50px;
            background: var(--light-green);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 15px;
            color: var(--primary-green);
            font-size: 1.2rem;
        }

        /* 产品展示 */
        .products-section {
            background: linear-gradient(to bottom, var(--light-bg) 0%, white 100%);
        }

        .products-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 30px;
        }

        .product-card {
            background: white;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            transition: var(--transition);
            position: relative;
            border-top: 4px solid var(--primary-green);
        }

        .product-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 30px 60px rgba(0, 0, 0, 0.1);
        }

        .product-badge {
            position: absolute;
            top: 20px;
            right: 20px;
            background: var(--accent-gold);
            color: var(--dark-bg);
            padding: 5px 15px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            z-index: 2;
        }

        .product-img {
            height: 200px;
            background: linear-gradient(135deg, var(--light-green), white);
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 30px;
        }

        .product-img i {
            font-size: 4rem;
            color: var(--primary-green);
            opacity: 0.8;
        }

        .product-content {
            padding: 25px;
        }

        .product-title {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--dark-green);
        }

        .product-specs {
            list-style: none;
            margin-top: 15px;
        }

        .product-specs li {
            padding: 8px 0;
            border-bottom: 1px dashed #eee;
            display: flex;
            justify-content: space-between;
            font-size: 0.9rem;
        }

        .product-specs li:last-child {
            border-bottom: none;
        }

        /* 证书展示 */
        .certificates-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 30px;
        }

        .certificate-card {
            background: white;
            border-radius: var(--border-radius);
            padding: 30px;
            text-align: center;
            box-shadow: var(--shadow-lg);
            transition: var(--transition);
            border: 1px solid rgba(10, 140, 111, 0.1);
        }

        .certificate-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
            border-color: var(--primary-green);
        }

        .certificate-icon {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, var(--light-green), white);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 2rem;
            color: var(--primary-green);
        }

        /* 开票信息 */
        .invoice-section {
            background: linear-gradient(135deg, var(--dark-bg) 0%, #1a2c47 100%);
            color: white;
        }

        .invoice-section .section-header h2,
        .invoice-section .section-header p {
            color: white;
        }

        .invoice-card {
            background: rgba(255, 255, 255, 0.05);
            border-radius: var(--border-radius);
            padding: 40px;
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            max-width: 900px;
            margin: 0 auto;
        }

        .info-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 25px;
            margin-bottom: 40px;
        }

        .info-item {
            padding: 20px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 10px;
            border-left: 4px solid var(--secondary-green);
        }

        .info-label {
            font-size: 0.9rem;
            color: var(--light-green);
            margin-bottom: 8px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .info-value {
            font-size: 1.1rem;
            font-weight: 500;
        }

        .highlight-box {
            background: linear-gradient(135deg, rgba(10, 140, 111, 0.2), rgba(42, 125, 225, 0.1));
            border-radius: 10px;
            padding: 25px;
            margin-top: 30px;
            border-left: 4px solid var(--accent-gold);
        }

        .highlight-box h4 {
            font-size: 1.2rem;
            margin-bottom: 15px;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        /* 页脚 */
        footer {
            background: var(--dark-bg);
            color: white;
            padding: 60px 0 30px;
        }

        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-section h3 {
            font-size: 1.3rem;
            margin-bottom: 20px;
            color: white;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-section h3::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 3px;
            background: var(--secondary-green);
        }

        .footer-links {
            list-style: none;
        }

        .footer-links li {
            margin-bottom: 12px;
        }

        .footer-links a {
            color: #b0b7c3;
            text-decoration: none;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }

        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #94a3b8;
            font-size: 0.9rem;
        }

        /* 响应式设计 */
        @media (max-width: 992px) {
            .hero-content, .about-content {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            
            .hero-text h2 {
                font-size: 2.5rem;
            }
            
            .section-header h2 {
                font-size: 2rem;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: var(--dark-bg);
                flex-direction: column;
                padding: 20px;
                gap: 15px;
                box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
            }
            
            .nav-links.active {
                display: flex;
            }
            
            .mobile-nav-toggle {
                display: block;
            }
            
            .hero {
                padding: 60px 0 40px;
            }
            
            .hero-text h2 {
                font-size: 2rem;
            }
            
            .section {
                padding: 60px 0;
            }
            
            .invoice-card {
                padding: 25px;
            }
        }

        @media (max-width: 480px) {
            .hero-stats {
                flex-direction: column;
                gap: 20px;
            }
            
            .about-features {
                grid-template-columns: 1fr;
            }
            
            .info-grid {
                grid-template-columns: 1fr;
            }
            
            .image-badge {
                position: relative;
                bottom: 0;
                right: 0;
                width: 100%;
                margin-top: 20px;
            }
        }

        /* 打印优化 */
        @media print {
            header, footer, .tech-bg, .grid-bg, .floating-element {
                display: none;
            }
            
            body {
                background: white;
                color: black;
            }
            
            .invoice-card {
                box-shadow: none;
                border: 1px solid #ddd;
                background: white;
                color: black;
            }
            
            .info-item {
                background: #f9f9f9;
                border: 1px solid #ddd;
            }
        }