* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        :root {
            --primary: #2c3e50;
            --secondary: #e67e22;
            --accent: #3498db;
            --light: #f8f9fa;
            --dark: #212529;
            --gray: #6c757d;
            --transition: all 0.3s ease;
        }
        
        body {
            background-color: #f5f7fa;
            color: var(--dark);
            line-height: 1.6;
            overflow-x: hidden;
        }
        
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }
        
        /* 导航栏样式 */
        header {
            background-color: white;
            box-shadow: 0 2px 15px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 10px 0;
        }
        
        .top-bar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0 0 10px;
            border-bottom: 1px solid #eee;
        }
        
        .contact-info {
            display: flex;
            gap: 20px;
            font-size: 14px;
        }
        
        .contact-info i {
            color: var(--secondary);
            margin-right: 5px;
        }
        
        .language-switcher {
            display: flex;
            gap: 10px;
        }
        
        .lang-btn {
            background: none;
            border: none;
            cursor: pointer;
            font-weight: 500;
            padding: 5px 10px;
            border-radius: 4px;
            transition: var(--transition);
        }
        
        .lang-btn.active {
            background-color: var(--primary);
            color: white;
        }
        
        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        
        .logo {
            display: flex;
            align-items: center;
        }
        
        .logo h1 {
            font-size: 28px;
            color: var(--primary);
            font-weight: 700;
        }
        
        .logo span {
            color: var(--secondary);
        }
        
        .nav-links {
            display: flex;
            list-style: none;
        }
        
        .nav-links li {
            margin-left: 30px;
        }
        
        .nav-links a {
            text-decoration: none;
            color: var(--dark);
            font-weight: 500;
            transition: var(--transition);
            position: relative;
            padding: 5px 0;
        }
        
        .nav-links a:hover {
            color: var(--secondary);
        }
        
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--secondary);
            transition: var(--transition);
        }
        
        .nav-links a:hover::after {
            width: 100%;
        }
        
        .nav-links .active {
            color: var(--secondary);
        }
        
        .nav-links .active::after {
            width: 100%;
        }
        
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            cursor: pointer;
            color: var(--primary);
        }
        
        /* 英雄区域样式 */
        .hero {
            background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('https://images.unsplash.com/photo-1584622650111-993a426fbf0a?ixlib=rb-4.0.3&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=1740&q=80');
            background-size: cover;
            background-position: center;
            height: 85vh;
            display: flex;
            align-items: center;
            text-align: center;
            color: white;
            position: relative;
        }
        
        .hero-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }
        
        .hero h2 {
            font-size: 3.5rem;
            margin-bottom: 20px;
            text-shadow: 0 2px 10px rgba(0,0,0,0.5);
        }
        
        .hero p {
            font-size: 1.3rem;
            margin-bottom: 40px;
            text-shadow: 0 1px 3px rgba(0,0,0,0.5);
        }
        
        .btn {
            display: inline-block;
            background-color: var(--secondary);
            color: white;
            padding: 14px 35px;
            border-radius: 30px;
            text-decoration: none;
            font-weight: 600;
            transition: var(--transition);
            border: 2px solid var(--secondary);
            font-size: 1.1rem;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        
        .btn:hover {
            background-color: transparent;
            color: var(--secondary);
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.2);
        }
        
        .btn-outline {
            background-color: transparent;
            color: white;
            border: 2px solid white;
            margin-left: 15px;
        }
        
        .btn-outline:hover {
            background-color: white;
            color: var(--primary);
        }
        
        /* 产品系列样式 */
        .section {
            padding: 80px 0;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 60px;
        }
        
        .section-title h2 {
            font-size: 2.5rem;
            color: var(--primary);
            position: relative;
            display: inline-block;
            padding-bottom: 15px;
        }
        
        .section-title h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background-color: var(--secondary);
        }
        
        .section-title p {
            max-width: 700px;
            margin: 20px auto 0;
            color: var(--gray);
            font-size: 1.1rem;
        }
        
        .categories {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        
        .category-card {
            background: white;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 8px 25px rgba(0,0,0,0.08);
            transition: var(--transition);
            position: relative;
        }
        
        .category-card:hover {
            transform: translateY(-15px);
            box-shadow: 0 15px 35px rgba(0,0,0,0.15);
        }
        
        .category-img {
            height: 250px;
            overflow: hidden;
            position: relative;
        }
        
        .category-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        
        .category-card:hover .category-img img {
            transform: scale(1.1);
        }
        
        .product-count {
            position: absolute;
            top: 15px;
            right: 15px;
            background: var(--accent);
            color: white;
            padding: 5px 15px;
            border-radius: 20px;
            font-size: 0.9rem;
            font-weight: 600;
        }
        
        .category-content {
            padding: 25px;
            text-align: center;
        }
        
        .category-content h3 {
            font-size: 1.6rem;
            margin-bottom: 15px;
            color: var(--primary);
        }
        
        .category-content p {
            color: var(--gray);
            margin-bottom: 20px;
            min-height: 60px;
        }
        
        /* 产品画廊样式 */
        .product-gallery {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0,0,0,0.9);
            z-index: 2000;
            padding: 50px;
            overflow: auto;
        }
        
        .gallery-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 30px;
            color: white;
        }
        
        .close-gallery {
            background: none;
            border: none;
            color: white;
            font-size: 2rem;
            cursor: pointer;
            transition: var(--transition);
        }
        
        .close-gallery:hover {
            color: var(--secondary);
            transform: rotate(90deg);
        }
        
        .gallery-content {
            max-width: 1200px;
            margin: 0 auto;
        }
        
        .gallery-title {
            font-size: 2.5rem;
            color: white;
            margin-bottom: 20px;
            text-align: center;
        }
        
        .gallery-description {
            color: #ddd;
            text-align: center;
            max-width: 800px;
            margin: 0 auto 40px;
            font-size: 1.1rem;
            line-height: 1.8;
        }
        
        .gallery-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 25px;
        }
        
        .gallery-item {
            background: #222;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.3);
            transition: var(--transition);
        }
        
        .gallery-item:hover {
            transform: translateY(-10px);
            box-shadow: 0 10px 25px rgba(230, 126, 34, 0.2);
        }
        
        .gallery-img {
            height: 220px;
            overflow: hidden;
        }
        
        .gallery-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        
        .gallery-item:hover .gallery-img img {
            transform: scale(1.1);
        }
        
        .gallery-item-info {
            padding: 15px;
            color: white;
        }
        
        .gallery-item-info h4 {
            font-size: 1.2rem;
            margin-bottom: 8px;
        }
        
        .gallery-item-info p {
            color: #bbb;
            font-size: 0.95rem;
        }
        
        /* 企业介绍样式 */
        .about {
            background: linear-gradient(to right, #f8f9fa 50%, white 50%);
        }
        
        .about-content {
            display: flex;
            align-items: center;
            gap: 50px;
        }
        
        .about-text {
            flex: 1;
        }
        
        .about-text h2 {
            font-size: 2.2rem;
            color: var(--primary);
            margin-bottom: 25px;
        }
        
        .about-text p {
            margin-bottom: 20px;
            color: var(--gray);
            font-size: 1.1rem;
            line-height: 1.8;
        }
        
        .about-stats {
            display: flex;
            margin-top: 40px;
            gap: 30px;
            flex-wrap: wrap;
        }
        
        .stat-item {
            text-align: center;
            min-width: 150px;
        }
        
        .stat-item .number {
            font-size: 2.8rem;
            font-weight: 700;
            color: var(--secondary);
            line-height: 1;
        }
        
        .stat-item .label {
            font-size: 1.1rem;
            color: var(--gray);
            margin-top: 10px;
        }
        
        .about-image {
            flex: 1;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 20px 40px rgba(0,0,0,0.15);
        }
        
        .about-image img {
            width: 100%;
            height: auto;
            display: block;
        }
        
        /* 页脚样式 */
        footer {
            background-color: var(--primary);
            color: white;
            padding: 80px 0 30px;
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 50px;
        }
        
        .footer-column h3 {
            font-size: 1.4rem;
            margin-bottom: 25px;
            position: relative;
            padding-bottom: 10px;
        }
        
        .footer-column h3::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 3px;
            background-color: var(--secondary);
        }
        
        .footer-links {
            list-style: none;
        }
        
        .footer-links li {
            margin-bottom: 12px;
        }
        
        .footer-links a {
            color: #ddd;
            text-decoration: none;
            transition: var(--transition);
            display: block;
            padding: 5px 0;
        }
        
        .footer-links a:hover {
            color: var(--secondary);
            padding-left: 5px;
        }
        
        .contact-info-footer {
            list-style: none;
        }
        
        .contact-info-footer li {
            display: flex;
            margin-bottom: 18px;
            align-items: flex-start;
        }
        
        .contact-info-footer i {
            color: var(--secondary);
            margin-right: 15px;
            min-width: 20px;
            font-size: 1.2rem;
            margin-top: 5px;
        }
        
        .social-links {
            display: flex;
            gap: 15px;
            margin-top: 25px;
        }
        
        .social-links a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 45px;
            height: 45px;
            background-color: rgba(255,255,255,0.1);
            border-radius: 50%;
            color: white;
            transition: var(--transition);
            font-size: 1.2rem;
        }
        
        .social-links a:hover {
            background-color: var(--secondary);
            transform: translateY(-5px);
        }
        
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #aaa;
            font-size: 0.95rem;
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .hero h2 {
                font-size: 2.8rem;
            }
            
            .about-content {
                flex-direction: column;
            }
            
            .about {
                background: #f8f9fa;
            }
        }
        
        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: white;
                flex-direction: column;
                box-shadow: 0 10px 15px rgba(0,0,0,0.1);
                padding: 20px 0;
            }
            
            .nav-links.active {
                display: flex;
            }
            
            .nav-links li {
                margin: 0;
                text-align: center;
            }
            
            .nav-links a {
                display: block;
                padding: 15px;
            }
            
            .mobile-menu-btn {
                display: block;
            }
            
            .contact-info {
                flex-direction: column;
                gap: 8px;
            }
            
            .hero h2 {
                font-size: 2.2rem;
            }
            
            .hero p {
                font-size: 1rem;
            }
            
            .section-title h2 {
                font-size: 2rem;
            }
            
            .btn-container {
                display: flex;
                flex-direction: column;
                gap: 15px;
            }
            
            .btn-outline {
                margin-left: 0;
            }
            
            .gallery-grid {
                grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
            }
        }