:root {
            --primary-color: #1a6dcc;
            --secondary-color: #0d4d8c;
            --accent-color: #ff9e1b;
            --dark-color: #1c3b5e;
            --light-color: #f8f9fa;
            --gray-color: #6c757d;
        }
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif;
            color: #333;
            line-height: 1.7;
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.95);
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
            padding: 15px 0;
            transition: all 0.3s ease;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--dark-color);
        }
        .navbar-brand span {
            color: var(--primary-color);
        }
        .nav-link {
            color: var(--dark-color) !important;
            font-weight: 500;
            margin: 0 8px;
            transition: color 0.3s;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary-color) !important;
        }
        .hero-section {
            background: linear-gradient(rgba(26, 109, 204, 0.85), rgba(13, 77, 140, 0.9)), url('https://images.unsplash.com/photo-1466611653911-95081537e5b7?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 120px 0;
            min-height: 85vh;
            display: flex;
            align-items: center;
        }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 25px;
            line-height: 1.2;
        }
        .hero-subtitle {
            font-size: 1.3rem;
            margin-bottom: 35px;
            opacity: 0.9;
        }
        .section-title {
            position: relative;
            margin-bottom: 50px;
            padding-bottom: 15px;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 80px;
            height: 4px;
            background-color: var(--primary-color);
        }
        .section-title.text-center::after {
            left: 50%;
            transform: translateX(-50%);
        }
        .card-hover {
            transition: transform 0.3s, box-shadow 0.3s;
            border: none;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            height: 100%;
        }
        .card-hover:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        .icon-box {
            width: 70px;
            height: 70px;
            background-color: rgba(26, 109, 204, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
        }
        .icon-box i {
            font-size: 1.8rem;
            color: var(--primary-color);
        }
        .service-card {
            border-radius: 10px;
            overflow: hidden;
            height: 100%;
            border: 1px solid #eee;
        }
        .service-img {
            height: 200px;
            overflow: hidden;
        }
        .service-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
        }
        .service-card:hover .service-img img {
            transform: scale(1.05);
        }
        .project-item {
            position: relative;
            overflow: hidden;
            border-radius: 8px;
            margin-bottom: 30px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
        }
        .project-img {
            height: 250px;
            overflow: hidden;
        }
        .project-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
        }
        .project-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
            color: white;
            padding: 30px 20px 20px;
            transform: translateY(20px);
            opacity: 0;
            transition: all 0.3s;
        }
        .project-item:hover .project-overlay {
            transform: translateY(0);
            opacity: 1;
        }
        .project-item:hover .project-img img {
            transform: scale(1.05);
        }
        .stats-section {
            background: linear-gradient(rgba(28, 59, 94, 0.9), rgba(28, 59, 94, 0.95)), url('https://images.unsplash.com/photo-1486406146926-c627a92ad1ab?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 80px 0;
        }
        .stat-item {
            text-align: center;
            padding: 20px;
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 700;
            color: var(--accent-color);
            margin-bottom: 10px;
        }
        .partner-logo {
            height: 100px;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
            border-radius: 8px;
            background-color: white;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s;
        }
        .partner-logo:hover {
            transform: translateY(-5px);
        }
        .partner-logo img {
            max-width: 100%;
            max-height: 60px;
            filter: grayscale(100%);
            opacity: 0.7;
            transition: all 0.3s;
        }
        .partner-logo:hover img {
            filter: grayscale(0);
            opacity: 1;
        }
        .friendlink {
            background-color: #f8f9fa;
            padding: 60px 0;
        }
        .flink {
            display: inline-block;
            padding: 8px 20px;
            margin: 5px 10px;
            background-color: white;
            border-radius: 5px;
            color: var(--dark-color);
            text-decoration: none;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
            transition: all 0.3s;
            border: 1px solid #eee;
        }
        .flink:hover {
            background-color: var(--primary-color);
            color: white;
            transform: translateY(-3px);
            text-decoration: none;
        }
        footer {
            background-color: var(--dark-color);
            color: rgba(255, 255, 255, 0.8);
            padding-top: 60px;
        }
        .footer-title {
            color: white;
            font-size: 1.2rem;
            margin-bottom: 25px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 3px;
            background-color: var(--accent-color);
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.7);
            text-decoration: none;
            display: block;
            margin-bottom: 10px;
            transition: color 0.3s;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        .footer-contact i {
            width: 30px;
            color: var(--accent-color);
        }
        .copyright {
            background-color: rgba(0, 0, 0, 0.2);
            padding: 20px 0;
            margin-top: 40px;
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }
            .hero-subtitle {
                font-size: 1.1rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .navbar {
                padding: 10px 0;
            }
        }
        @media (max-width: 576px) {
            .hero-title {
                font-size: 2rem;
            }
            .hero-section {
                padding: 80px 0;
                min-height: 70vh;
            }
        }
        .fade-in {
            animation: fadeIn 1s ease-in-out;
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .btn-primary-custom {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            padding: 12px 30px;
            border-radius: 5px;
            font-weight: 500;
            transition: all 0.3s;
        }
        .btn-primary-custom:hover {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        }
        .btn-outline-custom {
            border: 2px solid white;
            color: white;
            padding: 10px 30px;
            border-radius: 5px;
            font-weight: 500;
            transition: all 0.3s;
        }
        .btn-outline-custom:hover {
            background-color: white;
            color: var(--primary-color);
            transform: translateY(-3px);
        }