:root {
            --primary: #1a56db;
            --primary-dark: #1e429f;
            --secondary: #6b7280;
            --accent: #3b82f6;
            --light: #f9fafb;
            --dark: #111827;
            --success: #10b981;
            --warning: #f59e0b;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: #333;
            line-height: 1.6;
            overflow-x: hidden;
        }
        .section-header {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 50px;
        }
        .section-header:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 70px;
            height: 4px;
            background: var(--primary);
        }
        .section-header.center:after {
            left: 50%;
            transform: translateX(-50%);
        }
        .navbar {
            padding: 1.2rem 0;
            transition: all 0.3s ease;
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
        }
        .navbar.scrolled {
            padding: 0.8rem 0;
            background-color: rgba(255, 255, 255, 0.98) !important;
            backdrop-filter: blur(10px);
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary);
        }
        .nav-link {
            font-weight: 500;
            margin: 0 0.5rem;
            position: relative;
        }
        .nav-link:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            transition: width 0.3s ease;
        }
        .nav-link:hover:after, .nav-link.active:after {
            width: 100%;
        }
        .hero {
            background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
            color: white;
            padding: 150px 0 100px;
            position: relative;
            overflow: hidden;
        }
        .hero:before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('data:image/svg+xml;base64,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');
            opacity: 0.3;
        }
        .hero-content h1 {
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
        }
        @media (max-width: 768px) {
            .hero-content h1 {
                font-size: 2.5rem;
            }
        }
        .feature-card, .service-card, .case-card {
            transition: all 0.3s ease;
            border: none;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            height: 100%;
        }
        .feature-card:hover, .service-card:hover, .case-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        .icon-wrapper {
            width: 70px;
            height: 70px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
        }
        .counter-item {
            text-align: center;
            padding: 30px 20px;
        }
        .counter-number {
            font-size: 3rem;
            font-weight: 700;
            color: var(--primary);
            display: block;
            line-height: 1;
        }
        .solution-tabs .nav-link {
            border: none;
            border-radius: 0;
            padding: 1.2rem 1.5rem;
            color: var(--secondary);
            border-left: 3px solid transparent;
            font-weight: 500;
        }
        .solution-tabs .nav-link.active {
            background-color: rgba(59, 130, 246, 0.05);
            color: var(--primary);
            border-left: 3px solid var(--primary);
        }
        .team-card {
            border: none;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        .team-img {
            height: 280px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .team-card:hover .team-img {
            transform: scale(1.05);
        }
        .client-logo {
            filter: grayscale(100%);
            opacity: 0.6;
            transition: all 0.3s ease;
        }
        .client-logo:hover {
            filter: grayscale(0%);
            opacity: 1;
        }
        .friendlink .flink {
            display: inline-block;
            padding: 8px 20px;
            margin: 5px 10px;
            background-color: #f8f9fa;
            border-radius: 30px;
            color: #495057;
            text-decoration: none;
            transition: all 0.3s ease;
            border: 1px solid #e9ecef;
        }
        .friendlink .flink:hover {
            background-color: var(--primary);
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(26, 86, 219, 0.2);
        }
        .footer {
            background-color: var(--dark);
            color: #ccc;
            padding-top: 80px;
        }
        .footer h5 {
            color: white;
            margin-bottom: 1.5rem;
            position: relative;
            padding-bottom: 10px;
        }
        .footer h5:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 2px;
            background-color: var(--primary);
        }
        .footer-links a {
            color: #aaa;
            text-decoration: none;
            display: block;
            margin-bottom: 10px;
            transition: color 0.3s ease;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        .copyright {
            border-top: 1px solid #333;
            padding: 20px 0;
            margin-top: 50px;
        }
        @media (max-width: 768px) {
            .hero {
                padding: 120px 0 80px;
            }
            .section-header {
                margin-bottom: 30px;
            }
            .counter-number {
                font-size: 2.5rem;
            }
        }