:root {
            --primary: #0d6efd;
            --secondary: #6c757d;
            --success: #198754;
            --dark: #212529;
            --light: #f8f9fa;
            --accent: #0dcaf0;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            line-height: 1.6;
            color: #333;
        }
        .hero-section {
            background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
            color: white;
            padding: 120px 0 80px;
            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 0 100 100" preserveAspectRatio="none"><path d="M0,0 L100,0 L100,100 Z" fill="rgba(255,255,255,0.05)"/></svg>');
            background-size: cover;
        }
        .navbar {
            background-color: rgba(13, 110, 253, 0.95) !important;
            backdrop-filter: blur(10px);
            transition: all 0.3s ease;
            box-shadow: 0 2px 15px rgba(0,0,0,0.1);
        }
        .navbar.scrolled {
            background-color: rgba(13, 110, 253, 0.98) !important;
            padding-top: 8px;
            padding-bottom: 8px;
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 50px;
            text-align: center;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 3px;
            background: var(--primary);
        }
        .service-card {
            border: none;
            border-radius: 12px;
            overflow: hidden;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            height: 100%;
            background: white;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
        }
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        .service-icon {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, var(--primary), #0b5ed7);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            color: white;
            font-size: 32px;
        }
        .client-logo {
            filter: grayscale(100%);
            opacity: 0.7;
            transition: all 0.3s ease;
            padding: 15px;
            background: white;
            border-radius: 8px;
            box-shadow: 0 3px 10px rgba(0,0,0,0.05);
        }
        .client-logo:hover {
            filter: grayscale(0);
            opacity: 1;
            transform: scale(1.05);
        }
        .case-study {
            border-radius: 12px;
            overflow: hidden;
            position: relative;
            height: 300px;
            margin-bottom: 30px;
        }
        .case-study img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .case-study:hover img {
            transform: scale(1.05);
        }
        .case-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;
            transform: translateY(20px);
            opacity: 0;
            transition: all 0.3s ease;
        }
        .case-study:hover .case-overlay {
            transform: translateY(0);
            opacity: 1;
        }
        .contact-form .form-control {
            border-radius: 8px;
            border: 1px solid #ddd;
            padding: 12px 15px;
            transition: all 0.3s ease;
        }
        .contact-form .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
        }
        .flink {
            display: inline-block;
            padding: 8px 20px;
            background: #f8f9fa;
            border-radius: 6px;
            margin: 5px 8px;
            color: #495057;
            text-decoration: none;
            transition: all 0.3s ease;
            border: 1px solid #e9ecef;
        }
        .flink:hover {
            background: var(--primary);
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(13, 110, 253, 0.2);
            border-color: var(--primary);
        }
        footer {
            background: #1a1a1a;
            color: #ccc;
            padding-top: 60px;
        }
        .footer-links a {
            color: #aaa;
            text-decoration: none;
            transition: color 0.3s ease;
            display: block;
            margin-bottom: 10px;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            text-decoration: none;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
            z-index: 1000;
            box-shadow: 0 3px 10px rgba(13, 110, 253, 0.3);
        }
        .back-to-top.show {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: #0b5ed7;
            transform: translateY(-3px);
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 100px 0 60px;
            }
            .display-4 {
                font-size: 2.2rem;
            }
            .case-study {
                height: 250px;
            }
        }
        .animate-on-scroll {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .animate-on-scroll.animated {
            opacity: 1;
            transform: translateY(0);
        }
        .stats-counter {
            font-size: 3rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1;
        }
        .team-member {
            text-align: center;
            margin-bottom: 30px;
        }
        .team-img {
            width: 200px;
            height: 200px;
            border-radius: 50%;
            object-fit: cover;
            margin: 0 auto 20px;
            border: 5px solid white;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .timeline {
            position: relative;
            padding-left: 30px;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background: var(--primary);
        }
        .timeline-item {
            position: relative;
            margin-bottom: 30px;
            padding-left: 30px;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -36px;
            top: 5px;
            width: 15px;
            height: 15px;
            border-radius: 50%;
            background: var(--primary);
            border: 3px solid white;
            box-shadow: 0 0 0 3px var(--primary);
        }