:root {
            --primary-color: #0a5c7a;
            --secondary-color: #c19a6b;
            --accent-color: #e6f4f1;
            --text-dark: #333333;
            --text-light: #666666;
            --white: #ffffff;
            --light-bg: #f8f9fa;
            --shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Helvetica Neue', 'Microsoft YaHei', Arial, sans-serif;
            line-height: 1.6;
            color: var(--text-dark);
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5 {
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        .section-header {
            text-align: center;
            margin-bottom: 3rem;
            position: relative;
        }
        .section-header h2 {
            display: inline-block;
            font-size: 2.5rem;
            position: relative;
            padding-bottom: 15px;
        }
        .section-header h2:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 3px;
            background-color: var(--secondary-color);
        }
        .section-subtitle {
            color: var(--text-light);
            font-size: 1.1rem;
            max-width: 700px;
            margin: 0 auto;
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.95);
            box-shadow: var(--shadow);
            padding: 15px 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: 500;
            color: var(--text-dark) !important;
            margin: 0 8px;
            transition: var(--transition);
            position: relative;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary-color) !important;
        }
        .nav-link:hover:after, .nav-link.active:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: var(--primary-color);
        }
        .hero-section {
            background: linear-gradient(rgba(10, 92, 122, 0.85), rgba(10, 92, 122, 0.9)), url('https://images.unsplash.com/photo-1589984662646-e7b2e4962f18?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
            background-size: cover;
            background-position: center;
            color: var(--white);
            padding: 180px 0 120px;
            position: relative;
        }
        .hero-content h1 {
            color: var(--white);
            font-size: 3.5rem;
            margin-bottom: 1.5rem;
            text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.3);
        }
        .hero-content p {
            font-size: 1.2rem;
            margin-bottom: 2rem;
            max-width: 700px;
        }
        .btn-primary-custom {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
            color: var(--white);
            padding: 12px 30px;
            font-weight: 600;
            border-radius: 4px;
            transition: var(--transition);
        }
        .btn-primary-custom:hover {
            background-color: #b0895a;
            border-color: #b0895a;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        }
        .product-card {
            background-color: var(--white);
            border-radius: 10px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            height: 100%;
        }
        .product-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }
        .product-img {
            height: 220px;
            overflow: hidden;
        }
        .product-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .product-card:hover .product-img img {
            transform: scale(1.05);
        }
        .product-content {
            padding: 25px;
        }
        .product-title {
            font-size: 1.3rem;
            margin-bottom: 10px;
            color: var(--primary-color);
        }
        .about-section {
            background-color: var(--light-bg);
            padding: 100px 0;
        }
        .about-img {
            border-radius: 10px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .about-img img {
            width: 100%;
            height: auto;
        }
        .feature-box {
            background-color: var(--white);
            padding: 30px;
            border-radius: 8px;
            box-shadow: var(--shadow);
            margin-bottom: 25px;
            transition: var(--transition);
        }
        .feature-box:hover {
            transform: translateY(-5px);
        }
        .feature-icon {
            width: 70px;
            height: 70px;
            background-color: var(--accent-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            color: var(--primary-color);
            font-size: 1.8rem;
        }
        .process-section {
            padding: 100px 0;
        }
        .process-step {
            text-align: center;
            padding: 30px 20px;
            position: relative;
        }
        .step-number {
            width: 60px;
            height: 60px;
            background-color: var(--primary-color);
            color: var(--white);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: 700;
            margin: 0 auto 20px;
        }
        .news-section {
            background-color: var(--light-bg);
            padding: 100px 0;
        }
        .news-card {
            background-color: var(--white);
            border-radius: 10px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            height: 100%;
        }
        .news-card:hover {
            transform: translateY(-5px);
        }
        .news-date {
            background-color: var(--secondary-color);
            color: var(--white);
            padding: 8px 15px;
            display: inline-block;
            border-radius: 4px;
            font-weight: 600;
            margin-bottom: 15px;
        }
        .contact-section {
            padding: 100px 0;
        }
        .contact-info-box {
            background-color: var(--white);
            padding: 30px;
            border-radius: 10px;
            box-shadow: var(--shadow);
            margin-bottom: 30px;
            height: 100%;
            transition: var(--transition);
        }
        .contact-info-box:hover {
            transform: translateY(-5px);
        }
        .contact-icon {
            width: 60px;
            height: 60px;
            background-color: var(--accent-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            color: var(--primary-color);
            font-size: 1.5rem;
        }
        friendlink {
            display: block;
            padding: 50px 0;
            background-color: #f1f7f9;
        }
        .flink {
            display: inline-block;
            margin: 8px 15px;
            color: var(--text-light);
            text-decoration: none;
            transition: var(--transition);
            padding: 5px 10px;
            border-radius: 4px;
        }
        .flink:hover {
            color: var(--primary-color);
            background-color: rgba(10, 92, 122, 0.05);
        }
        .footer {
            background-color: #0b4a5f;
            color: var(--white);
            padding: 70px 0 20px;
        }
        .footer h5 {
            color: var(--white);
            margin-bottom: 25px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer h5:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 2px;
            background-color: var(--secondary-color);
        }
        .footer-links a {
            color: #cccccc;
            text-decoration: none;
            display: block;
            margin-bottom: 10px;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--secondary-color);
            padding-left: 5px;
        }
        .copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            margin-top: 50px;
            text-align: center;
            color: #aaaaaa;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .hero-content h1 {
                font-size: 2.8rem;
            }
            .section-header h2 {
                font-size: 2.2rem;
            }
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 150px 0 100px;
            }
            .hero-content h1 {
                font-size: 2.3rem;
            }
            .section-header h2 {
                font-size: 2rem;
            }
            .about-section, .process-section, .news-section, .contact-section {
                padding: 70px 0;
            }
        }
        @media (max-width: 576px) {
            .hero-content h1 {
                font-size: 1.9rem;
            }
            .section-header h2 {
                font-size: 1.7rem;
            }
            .navbar-brand {
                font-size: 1.5rem;
            }
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background-color: var(--primary-color);
            color: var(--white);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            cursor: pointer;
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            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(-3px);
        }