:root {
            --primary-blue: #0066cc;
            --dark-blue: #004d99;
            --light-blue: #e6f2ff;
            --neutral-gray: #4d4d4d;
            --light-gray: #f8f9fa;
            --accent-green: #00a86b;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: #333;
            overflow-x: hidden;
        }
        .navbar-brand img { height: 40px; }
        .hero-section {
            background: linear-gradient(rgba(0, 51, 102, 0.85), rgba(0, 77, 153, 0.9)), url('https://images.unsplash.com/photo-1473968512647-3e447244af8f?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80') center/cover no-repeat;
            color: white;
            padding: 120px 0 80px;
        }
        .section-title {
            color: var(--primary-blue);
            border-left: 5px solid var(--accent-green);
            padding-left: 15px;
            margin-bottom: 2rem;
        }
        .feature-icon {
            background-color: var(--light-blue);
            width: 70px;
            height: 70px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
            transition: transform 0.3s ease;
        }
        .feature-card:hover .feature-icon {
            transform: scale(1.1) rotate(5deg);
        }
        .product-card {
            border: none;
            border-radius: 10px;
            overflow: hidden;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            height: 100%;
        }
        .product-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }
        .product-img {
            height: 250px;
            object-fit: cover;
        }
        .solution-badge {
            position: absolute;
            top: 15px;
            right: 15px;
            background-color: var(--accent-green);
            color: white;
            padding: 5px 15px;
            border-radius: 20px;
            font-size: 0.85rem;
        }
        .timeline {
            position: relative;
            padding-left: 30px;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background-color: var(--primary-blue);
        }
        .timeline-item {
            position: relative;
            margin-bottom: 30px;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -36px;
            top: 5px;
            width: 15px;
            height: 15px;
            border-radius: 50%;
            background-color: var(--primary-blue);
            border: 3px solid white;
        }
        .contact-info-box {
            background: var(--light-gray);
            padding: 25px;
            border-radius: 10px;
            border-left: 5px solid var(--primary-blue);
            margin-bottom: 25px;
        }
        .footer {
            background-color: #1a1a1a;
            color: #ccc;
            padding-top: 60px;
        }
        .footer a {
            color: #aaa;
            text-decoration: none;
            transition: color 0.2s;
        }
        .footer a:hover {
            color: white;
        }
        .flink {
            display: inline-block;
            background: rgba(255,255,255,0.05);
            padding: 8px 20px;
            margin: 5px;
            border-radius: 5px;
            border: 1px solid rgba(255,255,255,0.1);
            transition: all 0.3s ease;
        }
        .flink:hover {
            background: rgba(255,255,255,0.1);
            border-color: var(--primary-blue);
            transform: translateY(-3px);
        }
        .map-container iframe {
            width: 100%;
            height: 300px;
            border: 0;
            border-radius: 10px;
        }
        .news-card {
            border-left: 3px solid transparent;
            transition: all 0.3s ease;
        }
        .news-card:hover {
            border-left-color: var(--primary-blue);
            background-color: #f8fbff;
        }
        @media (max-width: 768px) {
            .hero-section { padding: 100px 0 50px; }
            .display-4 { font-size: 2.2rem; }
            .product-img { height: 200px; }
        }