:root {
            --primary-color: #0d6efd;
            --secondary-color: #6c757d;
            --accent-color: #20c997;
            --dark-color: #212529;
            --light-color: #f8f9fa;
            --shadow: 0 4px 12px rgba(0,0,0,0.08);
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            line-height: 1.8;
            color: #444;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            color: var(--dark-color);
            margin-bottom: 1rem;
        }
        .section-header {
            text-align: center;
            margin-bottom: 3rem;
            padding-bottom: 1rem;
            position: relative;
        }
        .section-header:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--accent-color);
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.98);
            box-shadow: var(--shadow);
            padding: 1rem 0;
            transition: var(--transition);
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            color: var(--primary-color);
        }
        .nav-link {
            font-weight: 600;
            padding: 0.5rem 1.2rem !important;
            transition: var(--transition);
        }
        .nav-link:hover {
            color: var(--primary-color) !important;
            transform: translateY(-2px);
        }
        .hero-section {
            background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
            color: white;
            padding: 8rem 0 6rem;
            position: relative;
            overflow: hidden;
        }
        .hero-section:before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 600" opacity="0.1"><path d="M0 0h1200v600H0z" fill="none"/><path d="M0 300l1200-300v600L0 300z" fill="white"/></svg>') no-repeat;
            background-size: cover;
        }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }
        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            padding: 0.8rem 2.5rem;
            font-weight: 600;
            border-radius: 50px;
            transition: var(--transition);
        }
        .btn-primary:hover {
            background-color: #0b5ed7;
            border-color: #0b5ed7;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(13, 110, 253, 0.2);
        }
        .feature-card {
            background: white;
            border-radius: 12px;
            padding: 2.5rem 2rem;
            height: 100%;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid #eee;
        }
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }
        .feature-icon {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, var(--primary-color), #2a5298);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
            color: white;
            font-size: 2rem;
        }
        .service-item {
            padding: 2rem;
            background: white;
            border-radius: 12px;
            margin-bottom: 2rem;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .service-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 25px rgba(0,0,0,0.1);
        }
        .stats-section {
            background: linear-gradient(135deg, #2a5298 0%, #1e3c72 100%);
            color: white;
            padding: 5rem 0;
        }
        .stat-number {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 0.5rem;
        }
        .case-study-card {
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            height: 100%;
        }
        .case-study-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.15);
        }
        .case-study-img {
            height: 250px;
            object-fit: cover;
            width: 100%;
        }
        .team-card {
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .team-card:hover {
            transform: translateY(-8px);
        }
        .team-img {
            height: 280px;
            object-fit: cover;
            width: 100%;
        }
        .footer {
            background-color: var(--dark-color);
            color: #ccc;
            padding: 4rem 0 2rem;
        }
        .footer-links a {
            color: #aaa;
            text-decoration: none;
            transition: var(--transition);
            display: block;
            margin-bottom: 0.7rem;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        .friendlink {
            background-color: #f8f9fa;
            padding: 3rem 0;
        }
        .flink {
            display: inline-block;
            background: white;
            padding: 0.8rem 1.8rem;
            margin: 0.5rem;
            border-radius: 50px;
            text-decoration: none;
            color: #555;
            font-weight: 500;
            box-shadow: 0 3px 10px rgba(0,0,0,0.05);
            transition: var(--transition);
            border: 1px solid #eee;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-3px);
        }
        .copyright {
            background-color: #1a1a1a;
            color: #888;
            padding: 1.5rem 0;
            text-align: center;
        }
        .contact-info-item {
            display: flex;
            align-items: flex-start;
            margin-bottom: 2rem;
        }
        .contact-icon {
            width: 50px;
            height: 50px;
            background: var(--primary-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            margin-right: 1.5rem;
            flex-shrink: 0;
        }
        .form-control {
            padding: 0.8rem 1.2rem;
            border-radius: 8px;
            border: 1px solid #ddd;
        }
        .form-control:focus {
            box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }
            .stat-number {
                font-size: 2.5rem;
            }
            .navbar-nav {
                text-align: center;
                padding-top: 1rem;
            }
        }
        .article-content {
            font-size: 1.1rem;
            line-height: 1.9;
        }
        .article-content h3 {
            margin-top: 2.5rem;
            margin-bottom: 1.2rem;
            color: #2a5298;
        }
        .article-content p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .highlight-box {
            background: #f0f7ff;
            border-left: 5px solid var(--primary-color);
            padding: 1.5rem 2rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }