:root {
            --primary-dark: #0a0e17;
            --primary-light: #1a2436;
            --accent-rgb: 0, 123, 255;
            --accent: rgb(var(--accent-rgb));
            --accent-hover: rgba(var(--accent-rgb), 0.8);
            --text-light: #ffffff;
            --text-gray: #a0aec0;
            --gold: #d4af37;
            --transition: all 0.3s ease;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

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

        h1, h2, h3, h4, h5 {
         
            font-weight: 700;
            line-height: 1.2;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .btn {
            display: inline-block;
            padding: 12px 30px;
            background: transparent;
            border: 2px solid var(--accent);
            color: var(--text-light);
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
            cursor: pointer;
        }

        .btn:before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(var(--accent-rgb), 0.3), transparent);
            transition: 0.5s;
        }

        .btn:hover:before {
            left: 100%;
        }

        .btn:hover {
            background: var(--accent-hover);
            border-color: transparent;
        }

        .btn-primary {
            background: var(--accent);
        }

        .section {
            padding: 100px 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 70px;
        }

        .section-title {
            font-size: 2.8rem;
            margin-bottom: 20px;
            position: relative;
            display: inline-block;
        }

        .section-title:after {
            content: '';
            position: absolute;
            bottom: -15px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--accent);
        }

        .section-subtitle {
            font-size: 1.2rem;
            color: var(--text-gray);
            max-width: 700px;
            margin: 0 auto;
        }

        /* Header & Navigation */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(10, 14, 23, 0.95);
            backdrop-filter: blur(10px);
            padding: 15px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            transition: var(--transition);
        }

        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            display: flex;
            align-items: center;
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text-light);
        }

        .logo span {
            color: var(--accent);
        }

        .logo i {
            margin-right: 10px;
            color: var(--accent);
        }

        nav ul {
            display: flex;
            list-style: none;
        }

        nav ul li {
            margin: 0 15px;
        }

        nav ul li a {
            font-size: 1.1rem;
            font-weight: 500;
            position: relative;
            padding: 5px 0;
        }

        nav ul li a:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: var(--transition);
        }

        nav ul li a:hover:after,
        nav ul li a.active:after {
            width: 100%;
        }

        .contact-btn {
            background: var(--accent);
            padding: 10px 25px;
            border-radius: 3px;
            transition: var(--transition);
        }

        .contact-btn:hover {
            background: var(--accent-hover);
            transform: translateY(-3px);
        }

        .mobile-toggle {
            display: none;
            font-size: 1.5rem;
            cursor: pointer;
        }

        /* Hero Section */
        .hero {
            height: 100vh;
            min-height: 700px;
            position: relative;
            display: flex;
            align-items: center;
            overflow: hidden;
        }

        .hero:before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, rgba(10, 14, 23, 0.9) 0%, rgba(10, 14, 23, 0.6) 100%);
            z-index: 1;
        }

        .hero-video {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            z-index: 0;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
        }

        .hero-title {
            font-size: 4.5rem;
            margin-bottom: 20px;
            line-height: 1.1;
        }

        .hero-subtitle {
            font-size: 1.5rem;
            margin-bottom: 40px;
            color: var(--text-gray);
        }

        .hero-btns {
            display: flex;
            gap: 20px;
        }

        .hero-scroll {
            position: absolute;
            bottom: 40px;
            left: 50%;
            transform: translateX(-50%);
            animation: bounce 2s infinite;
        }

        @keyframes bounce {
            0%, 20%, 50%, 80%, 100% {transform: translateY(0);}
            40% {transform: translateY(-20px);}
            60% {transform: translateY(-10px);}
        }

        /* Services Section */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }

        .service-card {
            background: var(--primary-light);
            border-radius: 10px;
            padding: 40px 30px;
            text-align: center;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.05);
        }

        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
        }

        .service-icon {
            font-size: 3.5rem;
            color: var(--accent);
            margin-bottom: 25px;
        }

        .service-title {
            font-size: 1.5rem;
            margin-bottom: 15px;
        }

        .service-desc {
            color: var(--text-gray);
        }

        /* Products Section */
        .products-tabs {
            display: flex;
            justify-content: center;
            margin-bottom: 40px;
            flex-wrap: wrap;
            gap: 15px;
        }

        .tab-btn {
            padding: 12px 30px;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.1);
            color: var(--text-gray);
            border-radius: 30px;
            cursor: pointer;
            transition: var(--transition);
        }

        .tab-btn.active, .tab-btn:hover {
            background: var(--accent);
            color: var(--text-light);
            border-color: var(--accent);
        }

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

        .product-card {
            background: var(--primary-light);
            border-radius: 10px;
            overflow: hidden;
            position: relative;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
        }

        .product-img {
            height: 250px;
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .product-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(to top, rgba(10, 14, 23, 0.9), transparent);
            display: flex;
            align-items: flex-end;
            padding: 25px;
        }

        .product-title {
            font-size: 1.4rem;
            margin-bottom: 10px;
        }

        .product-category {
            color: var(--accent);
            font-size: 0.9rem;
        }

        .product-content {
            padding: 25px;
        }

        .product-features {
            margin: 20px 0;
            list-style: none;
        }

        .product-features li {
            margin-bottom: 10px;
            display: flex;
            align-items: center;
        }

        .product-features li i {
            color: var(--accent);
            margin-right: 10px;
        }

        /* Solutions Section */
        .solutions-container {
            background: var(--primary-light);
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
        }

        .solution-tabs {
            display: flex;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            flex-wrap: wrap;
        }

        .solution-tab {
            padding: 20px 30px;
            cursor: pointer;
            transition: var(--transition);
            position: relative;
            font-weight: 500;
        }

        .solution-tab.active, .solution-tab:hover {
            color: var(--accent);
        }

        .solution-tab.active:after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--accent);
        }

        .solution-content {
            padding: 50px;
        }

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

        .solution-card {
            position: relative;
            border-radius: 10px;
            overflow: hidden;
            height: 300px;
        }

        .solution-card img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .solution-card:hover img {
            transform: scale(1.05);
        }

        .solution-card-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            padding: 25px;
            background: linear-gradient(to top, rgba(10, 14, 23, 0.9), transparent);
        }

        .solution-card-title {
            font-size: 1.3rem;
            margin-bottom: 10px;
        }
 /* 关于我们 */
        .about {
            background: var(--darker);
            padding: 30px;
        }

        .about-content {
         display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 30px;
            text-align: center;
        }

        .about-text h2 {
            font-size: 2.5rem;
            margin-bottom: 25px;
        }

        .about-text h2 span {
            color: var(--primary);
        }

        .about-text p {
            margin-bottom: 20px;
            color: var(--gray);
        }

        .about-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-top: 30px;
        }

        .stat-box {
            text-align: center;
            padding: 20px;
            background: rgba(123, 118, 128, 0.1);
            border-radius: 10px;
        }

        .stat-box h3 {
            font-size: 2.5rem;
            color: var(--primary);
            margin-bottom: 5px;
        }

        .about-image {
            position: relative;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
        }
        /* Contact Section */
        .contact-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 50px;
        }

        .contact-info {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }

        .contact-item {
            display: flex;
            align-items: flex-start;
            gap: 20px;
        }

        .contact-icon {
            font-size: 1.8rem;
            color: var(--accent);
            min-width: 50px;
        }

        .contact-details h3 {
            margin-bottom: 10px;
        }

        .contact-form {
            background: var(--primary-light);
            padding: 40px;
            border-radius: 10px;
        }

        .form-group {
            margin-bottom: 25px;
        }

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
        }

        .form-control {
            width: 100%;
            padding: 15px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 5px;
            color: var(--text-light);
            font-family: inherit;
            font-size: 1rem;
            transition: var(--transition);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--accent);
            background: rgba(255, 255, 255, 0.08);
        }

        textarea.form-control {
            min-height: 150px;
            resize: vertical;
        }
/* 新增样式 */
.company-intro, .business-focus, .tech-service, .application, 
.company-advantages, .cooperation, .contact-about {
    margin-bottom: 50px;
    padding: 25px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 10px;
    border-left: 4px solid var(--accent);
}

.company-intro h2, .business-focus h2, .tech-service h2, 
.application h2, .company-advantages h2, .cooperation h2, .contact-about h2 {
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    gap: 15px;
}

.business-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-top: 20px;
}

.business-item {
    background: var(--primary-light);
    padding: 25px;
    border-radius: 8px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.business-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.business-icon {
    font-size: 2.5rem;
    color: var(--accent);
    margin-bottom: 15px;
}

.business-item h3 {
    margin-bottom: 15px;
    color: var(--text-light);
}

.business-item p {
    color: var(--text-gray);
    font-size: 0.95rem;
    line-height: 1.5;
}

.service-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.feature {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    padding: 20px;
    background: var(--primary-light);
    border-radius: 8px;
}

.feature i {
    font-size: 1.8rem;
    color: var(--accent);
    min-width: 40px;
}

.feature h4 {
    margin-bottom: 8px;
    color: var(--text-light);
}

.feature p {
    color: var(--text-gray);
    font-size: 0.95rem;
}

.app-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 20px;
}

.app-tag {
    padding: 8px 18px;
    background: rgba(var(--accent-rgb), 0.1);
    border: 1px solid rgba(var(--accent-rgb), 0.3);
    border-radius: 20px;
    font-size: 0.95rem;
    transition: var(--transition);
}

.app-tag:hover {
    background: rgba(var(--accent-rgb), 0.2);
    transform: translateY(-2px);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-top: 20px;
}

.advantage {
    background: var(--primary-light);
    padding: 25px;
    border-radius: 8px;
}

.advantage h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
    color: var(--accent);
}

.advantage p {
    color: var(--text-gray);
    line-height: 1.6;
}

.coop-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 25px;
    margin-top: 20px;
}

.coop-item {
    background: var(--primary-light);
    padding: 25px;
    border-radius: 8px;
    text-align: center;
}

.coop-icon {
    font-size: 2.2rem;
    color: var(--accent);
    margin-bottom: 15px;
}

.coop-item h4 {
    margin-bottom: 12px;
    color: var(--text-light);
}

.coop-item p {
    color: var(--text-gray);
    font-size: 0.95rem;
    line-height: 1.5;
}

.contact-info-box {
    background: var(--primary-light);
    padding: 30px;
    border-radius: 8px;
    margin-top: 20px;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-bottom: 20px;
}

.contact-col p {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.address {
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: flex-start;
    gap: 15px;
}

.contact-info-box i {
    color: var(--accent);
    width: 20px;
}

.contact-info-box strong {
    color: var(--text-light);
    min-width: 100px;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .business-grid, .advantages-grid, .coop-features {
        grid-template-columns: 1fr;
    }
    
    .service-features {
        grid-template-columns: 1fr;
    }
    
    .app-tags {
        gap: 8px;
    }
    
    .app-tag {
        font-size: 0.85rem;
        padding: 6px 14px;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-col p, .address {
        flex-direction: column;
        align-items: flex-start;
        gap: 5px;
    }
    
    .contact-info-box strong {
        min-width: auto;
    }
}

/* footer */

 footer {
            background: var(--primary-light);
            padding: 70px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 50px;
        }

        .footer-col h3 {
            font-size: 1.4rem;
            margin-bottom: 25px;
            position: relative;
            padding-bottom: 15px;
        }

        .footer-col h3:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 3px;
            background: var(--accent);
        }

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

        .footer-links li {
            margin-bottom: 15px;
        }

        .footer-links li a {
            color: var(--text-gray);
            transition: var(--transition);
            display: flex;
            align-items: center;
        }

        .footer-links li a:hover {
            color: var(--accent);
            padding-left: 5px;
        }

        .footer-links li a i {
            margin-right: 10px;
            color: var(--accent);
            font-size: 0.8rem;
        }

        .social-links {
            display: flex;
            gap: 15px;
            margin-top: 20px;
        }

        .social-links a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
            transition: var(--transition);
        }

        .social-links a:hover {
            background: var(--accent);
            transform: translateY(-5px);
        }

        .copyright {
            text-align: center;
            padding: 25px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            color: var(--text-gray);
            font-size: 0.9rem;
        }
 
        @keyframes float {
            0% { transform: translateY(0px); }
            50% { transform: translateY(-15px); }
            100% { transform: translateY(0px); }
        }

        .floating {
            animation: float 6s ease-in-out infinite;
        }
         
        @media (max-width: 992px) {
            .hero-title {
                font-size: 3.5rem;
            }
            
            .section-title {
                font-size: 2.3rem;
            }
        }

        @media (max-width: 768px) {
            .mobile-toggle {
                display: block;
            }
            
            nav {
                position: fixed;
                top: 80px;
                right: -100%;
                width: 280px;
                height: calc(100vh - 80px);
                background: var(--primary-light);
                transition: var(--transition);
                box-shadow: -5px 0 15px rgba(0, 0, 0, 0.2);
            }
            
            nav.active {
                right: 0;
            }
            
            nav ul {
                flex-direction: column;
                padding: 30px;
            }
            
            nav ul li {
                margin: 15px 0;
            }
            
            .hero-title {
                font-size: 2.8rem;
            }
            
            .hero-subtitle {
                font-size: 1.2rem;
            }
            
            .hero-btns {
                flex-direction: column;
                gap: 15px;
            }
            
            .section {
                padding: 70px 0;
            }
        }

        @media (max-width: 576px) {
            .hero-title {
                font-size: 2.3rem;
            }
            
            .section-title {
                font-size: 2rem;
            }
            
            .solution-content {
                padding: 30px 20px;
            }
            
            .contact-form {
                padding: 25px;
            }
        }

         /* 产品网格布局 */
        .products-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 30px;
            margin-top: 20px;
        }

        .product-card {
            background-color: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: transform 0.3s, box-shadow 0.3s;
        }

        .product-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
        }

        .product-image {
            height: 200px;
            overflow: hidden;
        }

        .product-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
        }

        .product-card:hover .product-image img {
            transform: scale(1.05);
        }

        .product-info {
            padding: 20px;
        }

        .product-title {
            font-size: 1.2rem;
            margin-bottom: 10px;
            height: 3.6em;
            overflow: hidden;
        }

        .product-title a {
            text-decoration: none;
            color: #000;
            transition: color 0.3s;
        }

        .product-title a:hover {
            color: var(--primary-color);
        }

        .product-price {
            font-size: 1.4rem;
            font-weight: bold;
            color: var(--accent-color);
            margin-bottom: 10px;
        }

        .original-price {
            text-decoration: line-through;
            color: var(--gray-color);
            font-size: 1rem;
            margin-left: 10px;
        }

        .discount {
            background-color: var(--accent-color);
            color: white;
            padding: 3px 8px;
            border-radius: 4px;
            font-size: 0.8rem;
            margin-left: 10px;
        }

        .product-description {
            color: var(--gray-color);
            font-size: 0.9rem;
            margin-bottom: 15px;
            height: 4.2em;
            overflow: hidden;
        }

        .product-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: 15px;
            font-size: 0.9rem;
        }

        .product-rating {
            color: #f1c40f;
        }

        .product-category {
            color: var(--gray-color);
        }

        .view-product-btn {
            display: block;
            width: 100%;
            padding: 12px;
            background-color: var(--primary-color);
            color: white;
            border: none;
            border-radius: 0 0 10px 10px;
            cursor: pointer;
            font-weight: bold;
            text-align: center;
            text-decoration: none;
            transition: background-color 0.3s;
        }

        .view-product-btn:hover {
            background-color: var(--secondary-color);
        }

        /* 分页 */
        .pagination {
            display: flex;
            justify-content: center;
            margin-top: 50px;
            gap: 5px;
        }

        .pagination a, .pagination span {
            display: inline-block;
            padding: 8px 15px;
            border: 1px solid var(--border-color);
            border-radius: 5px;
            text-decoration: none;
            color: var(--dark-color);
            transition: all 0.3s;
        }

        .pagination a:hover {
            background-color: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
        }

        .pagination .active {
            background-color: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
        }

        /* 空状态 */
        .no-products {
            text-align: center;
            padding: 60px 20px;
            color: var(--gray-color);
        }

        .no-products i {
            font-size: 3rem;
            margin-bottom: 20px;
            color: var(--border-color);
        }

        /* 响应式设计 */
        @media (max-width: 768px) {
            .products-grid {
                grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
                gap: 20px;
            }
        }

        @media (max-width: 576px) {
            .products-grid {
                grid-template-columns: 1fr;
            }
            
            .nav-links {
                display: none;
            }
        }