:root {
            --primary-color: #1a5276;
            --secondary-color: #d68910;
            --accent-color: #28b463;
            --light-bg: #f8f9fa;
            --dark-text: #2c3e50;
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: var(--dark-text);
            line-height: 1.7;
            overflow-x: hidden;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .nav-link {
            font-weight: 500;
            padding: 0.5rem 1.2rem !important;
            transition: var(--transition);
        }
        .nav-link:hover {
            color: var(--secondary-color) !important;
            transform: translateY(-2px);
        }
        .hero-section {
            background: linear-gradient(rgba(26, 82, 118, 0.85), rgba(26, 82, 118, 0.9)), url('https://images.unsplash.com/photo-1507003211169-0a1dd7228f2d?ixlib=rb-4.0.3&auto=format&fit=crop&w=1600&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 8rem 0;
            position: relative;
        }
        .hero-title {
            font-size: 3.2rem;
            font-weight: 800;
            margin-bottom: 1.5rem;
            text-shadow: 2px 2px 8px rgba(0,0,0,0.3);
        }
        .hero-subtitle {
            font-size: 1.3rem;
            margin-bottom: 2.5rem;
            opacity: 0.9;
        }
        .section-title {
            position: relative;
            padding-bottom: 1rem;
            margin-bottom: 3rem;
            font-weight: 700;
            color: var(--primary-color);
            text-align: center;
        }
        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--secondary-color);
            border-radius: 2px;
        }
        .service-card {
            border: none;
            border-radius: 12px;
            overflow: hidden;
            transition: var(--transition);
            height: 100%;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }
        .service-icon {
            width: 70px;
            height: 70px;
            background: var(--primary-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.5rem;
            color: white;
            font-size: 1.8rem;
        }
        .product-img {
            height: 220px;
            object-fit: cover;
            transition: var(--transition);
        }
        .product-card:hover .product-img {
            transform: scale(1.05);
        }
        .about-img {
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 800;
            color: var(--primary-color);
            display: block;
            line-height: 1;
        }
        .stat-label {
            font-size: 1.1rem;
            color: #666;
            font-weight: 500;
        }
        .contact-info-box {
            background: var(--light-bg);
            border-radius: 12px;
            padding: 2rem;
            height: 100%;
            transition: var(--transition);
        }
        .contact-info-box:hover {
            background: white;
            box-shadow: 0 10px 25px rgba(0,0,0,0.08);
        }
        .contact-icon {
            font-size: 2.2rem;
            color: var(--primary-color);
            margin-bottom: 1.2rem;
        }
        .footer {
            background: #1a2530;
            color: #bdc3c7;
            padding-top: 3rem;
        }
        .footer a {
            color: #ecf0f1;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer a:hover {
            color: var(--secondary-color);
            padding-left: 5px;
        }
        .copyright {
            background: #0c151f;
            padding: 1.5rem 0;
            font-size: 0.9rem;
        }
        .flink {
            display: inline-block;
            background: rgba(255,255,255,0.1);
            color: #ecf0f1;
            padding: 0.6rem 1.5rem;
            margin: 0.4rem 0.6rem;
            border-radius: 30px;
            transition: var(--transition);
            text-decoration: none !important;
            border: 1px solid rgba(255,255,255,0.2);
        }
        .flink:hover {
            background: var(--secondary-color);
            color: white;
            transform: translateY(-3px);
            border-color: var(--secondary-color);
        }
        .friendlink {
            background: #2c3e50;
            padding: 3rem 0;
        }
        .btn-custom {
            background: var(--primary-color);
            color: white;
            padding: 0.8rem 2rem;
            border-radius: 30px;
            font-weight: 600;
            border: 2px solid var(--primary-color);
            transition: var(--transition);
        }
        .btn-custom:hover {
            background: transparent;
            color: var(--primary-color);
            transform: translateY(-3px);
        }
        .btn-secondary-custom {
            background: var(--secondary-color);
            color: white;
            padding: 0.8rem 2rem;
            border-radius: 30px;
            font-weight: 600;
            border: 2px solid var(--secondary-color);
            transition: var(--transition);
        }
        .btn-secondary-custom:hover {
            background: transparent;
            color: var(--secondary-color);
            transform: translateY(-3px);
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.3rem;
            }
            .hero-section {
                padding: 5rem 0;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }
        .content-section {
            padding: 5rem 0;
        }
        .content-section:nth-child(even) {
            background: var(--light-bg);
        }
        .timeline {
            position: relative;
            max-width: 1200px;
            margin: 0 auto;
        }
        .timeline::after {
            content: '';
            position: absolute;
            width: 6px;
            background: var(--primary-color);
            top: 0;
            bottom: 0;
            left: 50%;
            margin-left: -3px;
        }
        .timeline-item {
            padding: 10px 40px;
            position: relative;
            width: 50%;
            box-sizing: border-box;
        }
        .timeline-item::after {
            content: '';
            position: absolute;
            width: 25px;
            height: 25px;
            background: var(--secondary-color);
            border: 4px solid white;
            border-radius: 50%;
            top: 15px;
            z-index: 1;
        }
        .left {
            left: 0;
        }
        .right {
            left: 50%;
        }
        .left::after {
            right: -12px;
        }
        .right::after {
            left: -12px;
        }
        .timeline-content {
            padding: 20px 30px;
            background: white;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
        }
        @media screen and (max-width: 768px) {
            .timeline::after {
                left: 31px;
            }
            .timeline-item {
                width: 100%;
                padding-left: 70px;
                padding-right: 25px;
            }
            .timeline-item::after {
                left: 18px;
            }
            .right {
                left: 0;
            }
        }
        .map-container {
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
            height: 400px;
        }
        .article-content {
            font-size: 1.1rem;
            line-height: 1.9;
        }
        .article-content h3 {
            color: var(--primary-color);
            margin-top: 2.5rem;
            margin-bottom: 1.2rem;
            font-weight: 700;
        }
        .article-content p {
            margin-bottom: 1.5rem;
        }