:root {
            --primary-blue: #0066a1;
            --secondary-blue: #0088cc;
            --accent-orange: #f57c00;
            --dark-gray: #333;
            --light-gray: #f8f9fa;
            --text-gray: #555;
        }
        body {
            font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            color: var(--text-gray);
            line-height: 1.7;
            overflow-x: hidden;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-blue);
        }
        .navbar-nav .nav-link {
            font-weight: 500;
            color: var(--dark-gray);
            padding: 0.5rem 1rem;
            transition: color 0.3s ease;
        }
        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link.active {
            color: var(--primary-blue);
            border-bottom: 2px solid var(--accent-orange);
        }
        .hero-section {
            background: linear-gradient(rgba(0, 102, 161, 0.85), rgba(0, 102, 161, 0.9)), url('https://images.unsplash.com/photo-1581094794329-c8112a89af12?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 120px 0 80px;
            min-height: 90vh;
            display: flex;
            align-items: center;
        }
        .hero-title {
            font-size: 3.2rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
        }
        .hero-subtitle {
            font-size: 1.4rem;
            margin-bottom: 2rem;
            opacity: 0.95;
        }
        .btn-primary-custom {
            background-color: var(--accent-orange);
            border-color: var(--accent-orange);
            padding: 0.8rem 2.5rem;
            font-weight: 600;
            border-radius: 4px;
            transition: all 0.3s ease;
        }
        .btn-primary-custom:hover {
            background-color: #e56b00;
            border-color: #e56b00;
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(245, 124, 0, 0.3);
        }
        .section-title {
            color: var(--primary-blue);
            font-weight: 700;
            margin-bottom: 3rem;
            position: relative;
            padding-bottom: 1rem;
        }
        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 80px;
            height: 4px;
            background-color: var(--accent-orange);
        }
        .section-title.center:after {
            left: 50%;
            transform: translateX(-50%);
        }
        .feature-card {
            border: none;
            border-radius: 12px;
            overflow: hidden;
            transition: transform 0.4s ease, box-shadow 0.4s ease;
            height: 100%;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
        }
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 102, 161, 0.15);
        }
        .feature-icon {
            font-size: 3rem;
            color: var(--primary-blue);
            margin-bottom: 1.5rem;
        }
        .card-title {
            color: var(--primary-blue);
            font-weight: 600;
        }
        .service-item {
            padding: 2rem;
            border-radius: 10px;
            background-color: var(--light-gray);
            transition: all 0.3s ease;
            height: 100%;
        }
        .service-item:hover {
            background-color: white;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        }
        .service-icon {
            background-color: var(--primary-blue);
            color: white;
            width: 70px;
            height: 70px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
            font-size: 1.8rem;
        }
        .timeline {
            position: relative;
            padding: 2rem 0;
        }
        .timeline:before {
            content: '';
            position: absolute;
            left: 50%;
            top: 0;
            bottom: 0;
            width: 4px;
            background-color: var(--primary-blue);
            transform: translateX(-50%);
        }
        .timeline-item {
            margin-bottom: 3rem;
            position: relative;
            width: 45%;
        }
        .timeline-item:nth-child(odd) {
            margin-left: 5%;
        }
        .timeline-item:nth-child(even) {
            margin-left: 50%;
        }
        .timeline-dot {
            position: absolute;
            top: 1.5rem;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background-color: var(--accent-orange);
            border: 4px solid white;
        }
        .timeline-item:nth-child(odd) .timeline-dot {
            right: -12px;
        }
        .timeline-item:nth-child(even) .timeline-dot {
            left: -12px;
        }
        .stats-number {
            font-size: 3rem;
            font-weight: 700;
            color: var(--primary-blue);
            line-height: 1;
        }
        .client-logo {
            filter: grayscale(100%);
            opacity: 0.7;
            transition: all 0.3s ease;
            padding: 1.5rem;
        }
        .client-logo:hover {
            filter: grayscale(0);
            opacity: 1;
        }
        .flink {
            display: inline-block;
            background-color: var(--light-gray);
            color: var(--primary-blue);
            padding: 0.6rem 1.5rem;
            margin: 0.5rem;
            border-radius: 4px;
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s ease;
            border: 1px solid #ddd;
        }
        .flink:hover {
            background-color: var(--primary-blue);
            color: white;
            transform: translateY(-3px);
            text-decoration: none;
        }
        .footer {
            background-color: #1a2a3a;
            color: #bbb;
            padding-top: 3rem;
        }
        .footer a {
            color: #bbb;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        .footer a:hover {
            color: white;
        }
        .footer-title {
            color: white;
            font-size: 1.2rem;
            margin-bottom: 1.5rem;
            font-weight: 600;
        }
        .copyright {
            background-color: #0f1a24;
            padding: 1.5rem 0;
            margin-top: 3rem;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }
            .hero-subtitle {
                font-size: 1.2rem;
            }
            .timeline:before {
                left: 30px;
            }
            .timeline-item {
                width: 100%;
                margin-left: 60px !important;
            }
            .timeline-item:nth-child(odd) .timeline-dot,
            .timeline-item:nth-child(even) .timeline-dot {
                left: -40px;
                right: auto;
            }
        }