:root {
            --primary-color: #0d6efd;
            --secondary-color: #6c757d;
            --accent-color: #ffc107;
            --light-bg: #f8f9fa;
            --dark-bg: #212529;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            line-height: 1.8;
            color: #333;
            overflow-x: hidden;
        }
        h1, h2, h3, h4 {
            font-weight: 700;
            margin-bottom: 1rem;
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.95);
            box-shadow: 0 4px 12px rgba(0,0,0,0.05);
            padding: 1rem 0;
            transition: all 0.3s;
        }
        .navbar-brand {
            font-size: 1.8rem;
            font-weight: bold;
            color: var(--primary-color);
        }
        .nav-link {
            font-weight: 500;
            margin: 0 0.5rem;
            color: #555 !important;
            transition: color 0.3s;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary-color) !important;
        }
        .hero-section {
            background: linear-gradient(135deg, #0d6efd 0%, #0dcaf0 100%);
            color: white;
            padding: 8rem 0;
            position: relative;
            overflow: hidden;
        }
        .hero-section h1 {
            font-size: 3.5rem;
            margin-bottom: 1.5rem;
            text-shadow: 0 2px 4px rgba(0,0,0,0.2);
        }
        .hero-section p {
            font-size: 1.2rem;
            margin-bottom: 2rem;
            opacity: 0.9;
        }
        .btn-custom {
            background-color: var(--accent-color);
            border: none;
            color: #212529;
            font-weight: 600;
            padding: 0.75rem 2rem;
            border-radius: 50px;
            transition: all 0.3s;
        }
        .btn-custom:hover {
            background-color: #e0a800;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        section {
            padding: 5rem 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: 3rem;
            position: relative;
        }
        .section-title:after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: var(--primary-color);
            margin: 10px auto;
            border-radius: 2px;
        }
        .card {
            border: none;
            border-radius: 12px;
            overflow: hidden;
            transition: transform 0.3s, box-shadow 0.3s;
            height: 100%;
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }
        .card-icon {
            font-size: 3rem;
            color: var(--primary-color);
            margin-bottom: 1.5rem;
        }
        .service-card .card-body {
            padding: 2rem;
        }
        .portfolio-item {
            position: relative;
            overflow: hidden;
            border-radius: 12px;
            margin-bottom: 1.5rem;
        }
        .portfolio-img {
            width: 100%;
            height: 250px;
            object-fit: cover;
            transition: transform 0.5s;
        }
        .portfolio-item:hover .portfolio-img {
            transform: scale(1.05);
        }
        .portfolio-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(13, 110, 253, 0.85);
            color: white;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            opacity: 0;
            transition: opacity 0.5s;
            padding: 2rem;
            text-align: center;
        }
        .portfolio-item:hover .portfolio-overlay {
            opacity: 1;
        }
        .team-member {
            text-align: center;
            margin-bottom: 2rem;
        }
        .team-img {
            width: 180px;
            height: 180px;
            border-radius: 50%;
            object-fit: cover;
            margin-bottom: 1.5rem;
            border: 5px solid var(--light-bg);
        }
        .contact-info {
            background: var(--light-bg);
            padding: 2rem;
            border-radius: 12px;
            margin-bottom: 2rem;
        }
        .contact-icon {
            font-size: 2rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        .friendlink {
            background: #f8f9fa;
            padding: 3rem 0;
        }
        .flink {
            display: inline-block;
            margin: 0.5rem 1rem;
            padding: 0.5rem 1.5rem;
            background: white;
            border-radius: 50px;
            color: #555;
            text-decoration: none;
            transition: all 0.3s;
            border: 1px solid #dee2e6;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-3px);
            border-color: var(--primary-color);
        }
        footer {
            background: var(--dark-bg);
            color: white;
            padding: 3rem 0 1.5rem;
        }
        .footer-link {
            color: #adb5bd;
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer-link:hover {
            color: white;
        }
        @media (max-width: 768px) {
            .hero-section h1 {
                font-size: 2.5rem;
            }
            .hero-section p {
                font-size: 1rem;
            }
            section {
                padding: 3rem 0;
            }
        }