:root {
            --primary-color: #1a365d;
            --secondary-color: #e63946;
            --accent-color: #2a9d8f;
            --light-color: #f8f9fa;
            --dark-color: #343a40;
            --shadow: 0 5px 15px rgba(0,0,0,0.08);
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: #333;
            line-height: 1.7;
        }
        .navbar {
            background-color: rgba(255,255,255,0.98);
            box-shadow: var(--shadow);
            padding: 0.8rem 0;
            transition: all 0.3s ease;
        }
        .navbar-brand {
            font-weight: 700;
            color: var(--primary-color) !important;
            font-size: 1.5rem;
        }
        .nav-link {
            color: var(--dark-color) !important;
            font-weight: 500;
            margin: 0 0.5rem;
            position: relative;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--secondary-color) !important;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            background: var(--secondary-color);
            left: 50%;
            bottom: 0;
            transition: all 0.3s ease;
        }
        .nav-link:hover::after, .nav-link.active::after {
            width: 80%;
            left: 10%;
        }
        .hero-section {
            background: linear-gradient(rgba(26, 54, 93, 0.85), rgba(26, 54, 93, 0.9)), url('https://images.unsplash.com/photo-1556742049-0cfed4f6a45d?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover no-repeat;
            color: white;
            padding: 8rem 0 6rem;
        }
        .section-title {
            position: relative;
            color: var(--primary-color);
            margin-bottom: 3rem;
            font-weight: 700;
        }
        .section-title::after {
            content: '';
            position: absolute;
            width: 70px;
            height: 4px;
            background: var(--secondary-color);
            bottom: -12px;
            left: 0;
        }
        .section-title.text-center::after {
            left: 50%;
            transform: translateX(-50%);
        }
        .card {
            border: none;
            border-radius: 12px;
            overflow: hidden;
            transition: all 0.3s ease;
            height: 100%;
            box-shadow: var(--shadow);
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        .service-icon {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.5rem;
            color: white;
            font-size: 2rem;
        }
        .product-img {
            height: 220px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .card:hover .product-img {
            transform: scale(1.05);
        }
        .stats-box {
            background: var(--light-color);
            border-radius: 12px;
            padding: 2rem;
            text-align: center;
            transition: all 0.3s ease;
        }
        .stats-box:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-5px);
        }
        .stats-number {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--secondary-color);
            display: block;
        }
        .stats-box:hover .stats-number {
            color: white;
        }
        .footer {
            background-color: var(--primary-color);
            color: rgba(255,255,255,0.85);
            padding: 4rem 0 2rem;
        }
        .footer a {
            color: rgba(255,255,255,0.75);
            text-decoration: none;
            transition: color 0.3s ease;
        }
        .footer a:hover {
            color: white;
            text-decoration: underline;
        }
        .friendlink a.flink {
            display: inline-block;
            background: var(--light-color);
            padding: 0.6rem 1.5rem;
            margin: 0.5rem;
            border-radius: 50px;
            color: var(--dark-color);
            font-weight: 500;
            transition: all 0.3s ease;
            border: 1px solid #dee2e6;
        }
        .friendlink a.flink:hover {
            background: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
            transform: translateY(-3px);
        }
        .contact-info i {
            width: 40px;
            color: var(--secondary-color);
        }
        .btn-custom {
            background: linear-gradient(to right, var(--primary-color), var(--accent-color));
            color: white;
            padding: 0.75rem 2rem;
            border-radius: 50px;
            border: none;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .btn-custom:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.2);
            color: white;
        }
        .map-container {
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow);
            height: 100%;
            min-height: 300px;
        }
        .timeline {
            position: relative;
            padding-left: 2rem;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 7px;
            top: 0;
            height: 100%;
            width: 2px;
            background: var(--accent-color);
        }
        .timeline-item {
            position: relative;
            margin-bottom: 2rem;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -2.35rem;
            top: 5px;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background: var(--secondary-color);
            border: 3px solid white;
            box-shadow: 0 0 0 3px var(--secondary-color);
        }
        @media (max-width: 768px) {
            .hero-section { padding: 6rem 0 4rem; }
            .section-title { font-size: 1.8rem; }
            .stats-number { font-size: 2rem; }
            .navbar-nav { text-align: center; padding: 1rem 0; }
        }