:root {
            --primary-color: #1a5f7a;
            --secondary-color: #2a9d8f;
            --accent-color: #e76f51;
            --light-color: #f8f9fa;
            --dark-color: #343a40;
            --gray-color: #6c757d;
        }
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif;
            line-height: 1.7;
            color: #333;
            overflow-x: hidden;
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.95);
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
            padding: 0.8rem 0;
            transition: all 0.3s ease;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.5rem;
            color: var(--primary-color);
        }
        .navbar-brand span {
            color: var(--accent-color);
        }
        .nav-link {
            font-weight: 500;
            margin: 0 0.3rem;
            color: var(--dark-color);
            transition: color 0.3s;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary-color);
        }
        .hero-section {
            background: linear-gradient(135deg, rgba(26, 95, 122, 0.9) 0%, rgba(42, 157, 143, 0.85) 100%), url('https://images.unsplash.com/photo-1556761175-b413da4baf72?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=1470&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 8rem 0 6rem;
            position: relative;
        }
        .hero-title {
            font-size: 3.2rem;
            font-weight: 800;
            margin-bottom: 1.5rem;
            text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
        }
        .hero-subtitle {
            font-size: 1.2rem;
            margin-bottom: 2.5rem;
            opacity: 0.9;
            max-width: 800px;
        }
        .section-title {
            position: relative;
            margin-bottom: 3rem;
            color: var(--primary-color);
            font-weight: 700;
        }
        .section-title::after {
            content: '';
            position: absolute;
            width: 80px;
            height: 4px;
            background-color: var(--accent-color);
            bottom: -15px;
            left: 0;
            border-radius: 2px;
        }
        .section-title.text-center::after {
            left: 50%;
            transform: translateX(-50%);
        }
        .card {
            border: none;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            height: 100%;
        }
        .card:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.12);
        }
        .service-icon {
            width: 70px;
            height: 70px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            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: transform 0.5s;
        }
        .card:hover .product-img {
            transform: scale(1.05);
        }
        .btn-primary-custom {
            background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
            border: none;
            padding: 0.8rem 2rem;
            border-radius: 30px;
            font-weight: 600;
            color: white;
            transition: all 0.3s ease;
        }
        .btn-primary-custom:hover {
            background: linear-gradient(to right, #144257, #1e7a6f);
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 8px 15px rgba(26, 95, 122, 0.3);
        }
        .btn-outline-custom {
            border: 2px solid var(--primary-color);
            color: var(--primary-color);
            padding: 0.8rem 2rem;
            border-radius: 30px;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .btn-outline-custom:hover {
            background-color: var(--primary-color);
            color: white;
        }
        .contact-info-box {
            background-color: white;
            padding: 2rem;
            border-radius: 12px;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
            height: 100%;
            transition: transform 0.3s;
        }
        .contact-info-box:hover {
            transform: translateY(-5px);
        }
        .contact-icon {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background-color: rgba(26, 95, 122, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-color);
            font-size: 1.5rem;
            margin-bottom: 1.5rem;
        }
        .stats-box {
            text-align: center;
            padding: 2rem;
            background-color: white;
            border-radius: 12px;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
            transition: transform 0.3s;
        }
        .stats-box:hover {
            transform: translateY(-5px);
        }
        .stats-number {
            font-size: 3rem;
            font-weight: 800;
            color: var(--primary-color);
            line-height: 1;
        }
        .footer {
            background-color: #1a252f;
            color: rgba(255, 255, 255, 0.8);
            padding-top: 4rem;
        }
        .footer h5 {
            color: white;
            margin-bottom: 1.5rem;
            font-weight: 600;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.7);
            text-decoration: none;
            display: block;
            margin-bottom: 0.8rem;
            transition: color 0.3s;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        .copyright {
            background-color: #0c151d;
            color: rgba(255, 255, 255, 0.6);
            padding: 1.5rem 0;
            margin-top: 3rem;
        }
        .flink {
            display: inline-block;
            background-color: white;
            padding: 0.8rem 1.5rem;
            border-radius: 8px;
            margin: 0.5rem;
            color: var(--dark-color);
            text-decoration: none;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
            transition: all 0.3s;
            border: 1px solid #eee;
        }
        .flink:hover {
            background-color: var(--primary-color);
            color: white;
            transform: translateY(-3px);
        }
        .timeline {
            position: relative;
            padding-left: 2rem;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background-color: var(--primary-color);
        }
        .timeline-item {
            position: relative;
            margin-bottom: 2.5rem;
            padding-left: 2rem;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -2.4rem;
            top: 5px;
            width: 15px;
            height: 15px;
            border-radius: 50%;
            background-color: var(--accent-color);
            border: 3px solid white;
            box-shadow: 0 0 0 3px var(--primary-color);
        }
        .testimonial-card {
            background-color: white;
            border-radius: 12px;
            padding: 2rem;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
            height: 100%;
            position: relative;
        }
        .testimonial-card::before {
            content: '"';
            position: absolute;
            top: 10px;
            right: 20px;
            font-size: 5rem;
            color: rgba(26, 95, 122, 0.1);
            font-family: Georgia, serif;
            line-height: 1;
        }
        .testimonial-author {
            display: flex;
            align-items: center;
            margin-top: 1.5rem;
        }
        .testimonial-author img {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            object-fit: cover;
            margin-right: 1rem;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background-color: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            text-decoration: none;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s;
            z-index: 1000;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background-color: var(--secondary-color);
            color: white;
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .stats-number {
                font-size: 2.2rem;
            }
            .navbar-nav {
                background-color: white;
                padding: 1rem;
                border-radius: 10px;
                box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
                margin-top: 0.5rem;
            }
        }
        .map-container {
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
        }
        .news-card {
            transition: all 0.3s;
        }
        .news-card:hover {
            background-color: rgba(26, 95, 122, 0.02);
        }
        .news-date {
            display: inline-block;
            background-color: var(--primary-color);
            color: white;
            padding: 0.3rem 1rem;
            border-radius: 30px;
            font-size: 0.9rem;
            margin-bottom: 1rem;
        }