:root {
            --primary-blue: #1a3a6c;
            --secondary-blue: #2d5aa0;
            --accent-gold: #d4af37;
            --light-bg: #f8f9fa;
            --dark-text: #333333;
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: var(--dark-text);
            line-height: 1.6;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5 {
            color: var(--primary-blue);
            font-weight: 600;
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.95);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            padding: 1rem 0;
            transition: var(--transition);
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-blue) !important;
        }
        .nav-link {
            color: var(--primary-blue) !important;
            font-weight: 500;
            margin: 0 0.5rem;
            transition: var(--transition);
            position: relative;
        }
        .nav-link:hover {
            color: var(--accent-gold) !important;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            background: var(--accent-gold);
            left: 50%;
            bottom: -5px;
            transition: var(--transition);
            transform: translateX(-50%);
        }
        .nav-link:hover::after {
            width: 80%;
        }
        .hero-section {
            background: linear-gradient(rgba(26, 58, 108, 0.85), rgba(45, 90, 160, 0.9)), url('https://images.unsplash.com/photo-1450101499163-c8848c66ca85?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 8rem 0;
            min-height: 90vh;
            display: flex;
            align-items: center;
        }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
        }
        .hero-subtitle {
            font-size: 1.5rem;
            margin-bottom: 2rem;
            max-width: 700px;
        }
        .btn-primary-custom {
            background-color: var(--accent-gold);
            border: none;
            color: white;
            padding: 0.8rem 2.5rem;
            border-radius: 30px;
            font-weight: 600;
            transition: var(--transition);
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .btn-primary-custom:hover {
            background-color: #b8941f;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
        }
        .section-title {
            text-align: center;
            margin-bottom: 3rem;
            position: relative;
        }
        .section-title::after {
            content: '';
            position: absolute;
            width: 80px;
            height: 4px;
            background: var(--accent-gold);
            bottom: -15px;
            left: 50%;
            transform: translateX(-50%);
        }
        .service-card {
            background: white;
            border-radius: 10px;
            padding: 2.5rem 2rem;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: var(--transition);
            height: 100%;
            border-top: 4px solid transparent;
        }
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
            border-top-color: var(--accent-gold);
        }
        .service-icon {
            font-size: 3rem;
            color: var(--secondary-blue);
            margin-bottom: 1.5rem;
        }
        .stats-section {
            background: linear-gradient(to right, var(--primary-blue), var(--secondary-blue));
            color: white;
            padding: 5rem 0;
        }
        .stat-number {
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }
        .case-study-card {
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            transition: var(--transition);
            height: 100%;
        }
        .case-study-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }
        .case-study-img {
            height: 250px;
            object-fit: cover;
            width: 100%;
        }
        .team-member {
            text-align: center;
            margin-bottom: 2rem;
        }
        .team-img {
            width: 180px;
            height: 180px;
            border-radius: 50%;
            object-fit: cover;
            margin-bottom: 1.5rem;
            border: 5px solid var(--light-bg);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        .news-card {
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: var(--transition);
            height: 100%;
            background: white;
        }
        .news-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        }
        .news-date {
            background: var(--accent-gold);
            color: white;
            padding: 0.5rem 1rem;
            display: inline-block;
            border-radius: 30px;
            font-size: 0.9rem;
            position: absolute;
            top: 15px;
            left: 15px;
        }
        .contact-info-box {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            text-align: center;
            height: 100%;
            transition: var(--transition);
        }
        .contact-info-box:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        }
        .contact-icon {
            font-size: 2.5rem;
            color: var(--secondary-blue);
            margin-bottom: 1.5rem;
        }
        footer {
            background-color: var(--primary-blue);
            color: white;
            padding: 4rem 0 2rem;
        }
        .footer-links h5 {
            color: white;
            margin-bottom: 1.5rem;
            font-size: 1.2rem;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
            display: block;
            margin-bottom: 0.8rem;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent-gold);
            padding-left: 5px;
        }
        .social-icons a {
            display: inline-block;
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            text-align: center;
            line-height: 40px;
            margin-right: 10px;
            color: white;
            transition: var(--transition);
        }
        .social-icons a:hover {
            background: var(--accent-gold);
            transform: translateY(-5px);
        }
        .copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 2rem;
            margin-top: 3rem;
            text-align: center;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
        }
        .flink {
            background: white;
            border-radius: 8px;
            padding: 1.5rem;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-blue);
            text-decoration: none;
            font-weight: 600;
            transition: var(--transition);
            height: 100%;
            border: 1px solid #eaeaea;
        }
        .flink:hover {
            background: var(--light-bg);
            color: var(--secondary-blue);
            transform: translateY(-5px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        .flink-logo {
            height: 30px;
            margin-right: 10px;
            object-fit: contain;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--accent-gold);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            text-decoration: none;
            z-index: 1000;
            opacity: 0;
            transition: var(--transition);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        .back-to-top.active {
            opacity: 1;
        }
        .back-to-top:hover {
            background: #b8941f;
            transform: translateY(-5px);
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }
            .hero-subtitle {
                font-size: 1.2rem;
            }
            .section-title {
                font-size: 2rem;
            }
            .stat-number {
                font-size: 2.5rem;
            }
        }