:root {
            --primary-color: #0a5c8c;
            --secondary-color: #e6a23c;
            --accent-color: #2c7c5f;
            --light-color: #f8f9fa;
            --dark-color: #343a40;
            --text-color: #333;
            --border-radius: 8px;
            --box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', Arial, sans-serif;
            color: var(--text-color);
            line-height: 1.7;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            color: var(--dark-color);
        }
        .section-title {
            position: relative;
            margin-bottom: 3rem;
            padding-bottom: 1rem;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 80px;
            height: 4px;
            background: var(--secondary-color);
        }
        .section-title.text-center::after {
            left: 50%;
            transform: translateX(-50%);
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.98);
            box-shadow: 0 2px 10px rgba(0,0,0,0.08);
            padding: 0.8rem 0;
            transition: var(--transition);
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .navbar-brand span {
            color: var(--secondary-color);
        }
        .nav-link {
            font-weight: 600;
            padding: 0.5rem 1.2rem !important;
            color: var(--dark-color) !important;
            transition: var(--transition);
            position: relative;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary-color) !important;
        }
        .nav-link:hover::after {
            width: 70%;
        }
        .navbar-toggler {
            border: none;
            padding: 0.5rem;
        }
        .navbar-toggler:focus {
            box-shadow: none;
        }
        .hero-section {
            background: linear-gradient(rgba(10, 92, 140, 0.85), rgba(44, 124, 95, 0.9)), url('https://images.unsplash.com/photo-1541888946425-d81bb19240f5?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            color: white;
            padding: 10rem 0 8rem;
            position: relative;
        }
        .hero-content h1 {
            color: white;
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 1.5rem;
            text-shadow: 1px 1px 3px rgba(0,0,0,0.3);
        }
        .hero-content p {
            font-size: 1.3rem;
            margin-bottom: 2.5rem;
            max-width: 700px;
        }
        .btn-primary {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
            padding: 0.8rem 2.5rem;
            font-weight: 600;
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        .btn-primary:hover {
            background-color: #d8922b;
            border-color: #d8922b;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        .btn-outline-light {
            border-radius: var(--border-radius);
            padding: 0.8rem 2.5rem;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-outline-light:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        .feature-card, .product-card, .service-card {
            background: white;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            padding: 2rem;
            height: 100%;
            transition: var(--transition);
            border: 1px solid rgba(0,0,0,0.05);
        }
        .feature-card:hover, .product-card:hover, .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.12);
        }
        .icon-box {
            width: 80px;
            height: 80px;
            background: rgba(10, 92, 140, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
            color: var(--primary-color);
            font-size: 2rem;
        }
        .product-img {
            height: 220px;
            object-fit: cover;
            border-radius: var(--border-radius) var(--border-radius) 0 0;
            width: 100%;
        }
        .product-card {
            padding: 0;
            overflow: hidden;
        }
        .product-content {
            padding: 1.5rem;
        }
        .product-badge {
            position: absolute;
            top: 15px;
            right: 15px;
            background: var(--secondary-color);
            color: white;
            padding: 0.3rem 0.8rem;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
        }
        .about-section {
            padding: 6rem 0;
            background-color: #f9f9f9;
        }
        .about-img {
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            overflow: hidden;
        }
        .about-img img {
            transition: var(--transition);
        }
        .about-img:hover img {
            transform: scale(1.05);
        }
        .counter-box {
            text-align: center;
            padding: 2rem;
            background: white;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            transition: var(--transition);
        }
        .counter-box:hover {
            transform: translateY(-5px);
        }
        .counter {
            font-size: 3rem;
            font-weight: 800;
            color: var(--primary-color);
            display: block;
            line-height: 1;
            margin-bottom: 0.5rem;
        }
        .service-icon {
            font-size: 3rem;
            color: var(--primary-color);
            margin-bottom: 1.5rem;
        }
        .news-card {
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--box-shadow);
            transition: var(--transition);
            height: 100%;
            background: white;
        }
        .news-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.12);
        }
        .news-img {
            height: 220px;
            object-fit: cover;
            width: 100%;
        }
        .news-content {
            padding: 1.5rem;
        }
        .news-date {
            color: var(--secondary-color);
            font-weight: 600;
            font-size: 0.9rem;
        }
        .contact-form .form-control {
            padding: 0.8rem 1rem;
            border-radius: var(--border-radius);
            border: 1px solid #ddd;
            margin-bottom: 1.5rem;
        }
        .contact-form .form-control:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 0.25rem rgba(10, 92, 140, 0.25);
        }
        .footer {
            background-color: var(--dark-color);
            color: rgba(255,255,255,0.8);
            padding-top: 4rem;
        }
        .footer h5 {
            color: white;
            margin-bottom: 1.5rem;
            font-size: 1.2rem;
        }
        .footer-links {
            list-style: none;
            padding-left: 0;
        }
        .footer-links li {
            margin-bottom: 0.7rem;
        }
        .footer-links a {
            color: rgba(255,255,255,0.7);
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--secondary-color);
            padding-left: 5px;
        }
        .footer-bottom {
            background-color: rgba(0,0,0,0.2);
            padding: 1.5rem 0;
            margin-top: 4rem;
        }
        .friendlink-section {
            background-color: #f1f1f1;
            padding: 3rem 0;
        }
        .flink {
            display: inline-block;
            background: white;
            padding: 0.8rem 1.5rem;
            border-radius: var(--border-radius);
            margin: 0.5rem;
            color: var(--dark-color);
            text-decoration: none;
            transition: var(--transition);
            border: 1px solid #eaeaea;
            font-weight: 500;
        }
        .flink:hover {
            background-color: var(--primary-color);
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        @media (max-width: 992px) {
            .hero-content h1 {
                font-size: 2.8rem;
            }
            .hero-section {
                padding: 8rem 0 6rem;
            }
        }
        @media (max-width: 768px) {
            .hero-content h1 {
                font-size: 2.3rem;
            }
            .hero-content p {
                font-size: 1.1rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .counter {
                font-size: 2.5rem;
            }
        }
        @media (max-width: 576px) {
            .hero-content h1 {
                font-size: 2rem;
            }
            .btn-primary, .btn-outline-light {
                display: block;
                width: 100%;
                margin-bottom: 1rem;
            }
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background-color: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            z-index: 1000;
            cursor: pointer;
            transition: var(--transition);
            opacity: 0;
            visibility: hidden;
            box-shadow: 0 3px 10px rgba(0,0,0,0.2);
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background-color: var(--secondary-color);
            transform: translateY(-5px);
        }