:root {
            --primary-blue: #0056a6;
            --secondary-blue: #1e88e5;
            --industrial-green: #2e7d32;
            --accent-orange: #ff9800;
            --light-bg: #f8f9fa;
            --dark-text: #212529;
        }
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif;
            color: var(--dark-text);
            overflow-x: hidden;
        }
        .hero-section {
            background: linear-gradient(rgba(0, 30, 60, 0.85), rgba(0, 30, 60, 0.9)), url('https://images.unsplash.com/photo-1581094794329-c8112a89af12?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80') center/cover no-repeat;
            color: white;
            padding: 150px 0 100px;
            position: relative;
        }
        .nav-shadow {
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-blue) !important;
        }
        .nav-link {
            font-weight: 500;
            padding: 0.5rem 1.2rem !important;
            border-radius: 4px;
            transition: all 0.3s ease;
        }
        .nav-link:hover, .nav-link.active {
            background-color: rgba(30, 136, 229, 0.1);
            color: var(--primary-blue) !important;
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 50px;
            color: var(--primary-blue);
            font-weight: 700;
        }
        .section-title:after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 80px;
            height: 4px;
            background: linear-gradient(to right, var(--primary-blue), var(--accent-orange));
            border-radius: 2px;
        }
        .section-title.center:after {
            left: 50%;
            transform: translateX(-50%);
        }
        .feature-card {
            border: none;
            border-radius: 12px;
            overflow: hidden;
            transition: transform 0.4s ease, box-shadow 0.4s ease;
            height: 100%;
            background: white;
        }
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 86, 166, 0.15) !important;
        }
        .feature-icon {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            background: linear-gradient(135deg, var(--secondary-blue), #64b5f6);
            color: white;
            font-size: 2rem;
        }
        .product-card {
            border-left: 5px solid var(--industrial-green);
            transition: all 0.3s ease;
        }
        .product-card:hover {
            border-left-color: var(--accent-orange);
            box-shadow: 0 8px 20px rgba(46, 125, 50, 0.1);
        }
        .timeline {
            position: relative;
            padding-left: 30px;
        }
        .timeline:before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 4px;
            background: linear-gradient(to bottom, var(--primary-blue), var(--secondary-blue));
            border-radius: 2px;
        }
        .timeline-item {
            position: relative;
            margin-bottom: 30px;
            padding-left: 20px;
        }
        .timeline-item:before {
            content: '';
            position: absolute;
            left: -33px;
            top: 5px;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background-color: var(--secondary-blue);
            border: 3px solid white;
            box-shadow: 0 0 0 3px var(--secondary-blue);
        }
        .stats-number {
            font-size: 3rem;
            font-weight: 800;
            background: linear-gradient(to right, var(--primary-blue), var(--industrial-green));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            line-height: 1;
        }
        .contact-info-box {
            border-left: 4px solid var(--accent-orange);
            padding-left: 20px;
            margin-bottom: 30px;
            transition: all 0.3s ease;
        }
        .contact-info-box:hover {
            transform: translateX(5px);
        }
        footer {
            background: linear-gradient(to right, #0d3b66, #154e8c);
            color: white;
            padding-top: 60px;
        }
        .footer-links a {
            color: #c5d6f1;
            text-decoration: none;
            transition: color 0.3s ease;
            display: inline-block;
            margin-bottom: 8px;
        }
        .footer-links a:hover {
            color: white;
            transform: translateX(5px);
        }
        .friendlink {
            background-color: rgba(255, 255, 255, 0.05);
            border-radius: 8px;
            padding: 20px;
            margin-top: 30px;
        }
        .flink {
            display: inline-block;
            background-color: rgba(255, 255, 255, 0.08);
            color: #c5d6f1;
            padding: 8px 18px;
            margin: 5px 8px;
            border-radius: 50px;
            text-decoration: none;
            transition: all 0.3s ease;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }
        .flink:hover {
            background-color: rgba(255, 255, 255, 0.15);
            color: white;
            transform: translateY(-3px);
            text-decoration: none;
        }
        .btn-cta {
            background: linear-gradient(to right, var(--primary-blue), var(--secondary-blue));
            color: white;
            padding: 12px 30px;
            border-radius: 50px;
            border: none;
            font-weight: 600;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(30, 136, 229, 0.3);
        }
        .btn-cta:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(30, 136, 229, 0.4);
            color: white;
        }
        .news-card {
            border-top: 5px solid var(--secondary-blue);
            transition: all 0.3s ease;
        }
        .news-card:hover {
            border-top-color: var(--accent-orange);
        }
        .map-container {
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
            height: 400px;
        }
        .environment-badge {
            position: absolute;
            top: 15px;
            right: 15px;
            background-color: var(--industrial-green);
            color: white;
            padding: 5px 15px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 120px 0 60px;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .stats-number {
                font-size: 2.2rem;
            }
            .navbar-collapse {
                background-color: white;
                padding: 15px;
                border-radius: 10px;
                margin-top: 10px;
                box-shadow: 0 10px 20px rgba(0,0,0,0.1);
            }
        }