:root {
            --primary-color: #1a365d;
            --secondary-color: #e6b325;
            --accent-color: #2d6a4f;
            --light-bg: #f8f9fa;
            --dark-text: #333333;
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Helvetica Neue', Arial, 'Microsoft YaHei', sans-serif;
            color: var(--dark-text);
            line-height: 1.6;
        }
        .navbar-brand {
            font-weight: 700;
            color: var(--primary-color) !important;
        }
        .nav-link {
            font-weight: 500;
            transition: var(--transition);
        }
        .nav-link:hover {
            color: var(--secondary-color) !important;
        }
        .hero-section {
            background: linear-gradient(rgba(26, 54, 93, 0.85), rgba(26, 54, 93, 0.9)), url('https://images.unsplash.com/photo-1503387769-00a112127ca8?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover no-repeat;
            color: white;
            padding: 120px 0;
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 40px;
            color: var(--primary-color);
        }
        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 70px;
            height: 4px;
            background-color: var(--secondary-color);
        }
        .card {
            border: none;
            border-radius: 10px;
            overflow: hidden;
            transition: var(--transition);
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            height: 100%;
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }
        .card-img-top {
            height: 220px;
            object-fit: cover;
        }
        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            padding: 10px 25px;
            border-radius: 5px;
            transition: var(--transition);
        }
        .btn-primary:hover {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
            color: var(--primary-color);
        }
        .icon-box {
            width: 70px;
            height: 70px;
            border-radius: 50%;
            background-color: rgba(230, 179, 37, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            color: var(--secondary-color);
            font-size: 30px;
        }
        footer {
            background-color: var(--primary-color);
            color: #ddd;
        }
        .footer-links a {
            color: #ddd;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--secondary-color);
            padding-left: 5px;
        }
        .contact-info li {
            margin-bottom: 15px;
        }
        .contact-info i {
            color: var(--secondary-color);
            width: 25px;
        }
        .flink {
            display: inline-block;
            background: rgba(255,255,255,0.1);
            padding: 8px 20px;
            margin: 5px 10px 5px 0;
            border-radius: 5px;
            color: white;
            text-decoration: none;
            transition: var(--transition);
        }
        .flink:hover {
            background: var(--secondary-color);
            color: var(--primary-color);
            transform: translateY(-3px);
        }
        .map-container {
            height: 400px;
            border-radius: 10px;
            overflow: hidden;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 80px 0;
                text-align: center;
            }
            .section-title {
                text-align: center;
            }
            .section-title:after {
                left: 50%;
                transform: translateX(-50%);
            }
        }
        .product-tag {
            position: absolute;
            top: 15px;
            right: 15px;
            background: var(--accent-color);
            color: white;
            padding: 5px 12px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
        }
        .news-date {
            color: #666;
            font-size: 0.9rem;
        }
        .sticky-nav {
            position: sticky;
            top: 0;
            z-index: 1020;
            background-color: rgba(255, 255, 255, 0.98);
            box-shadow: 0 4px 12px rgba(0,0,0,0.05);
        }