:root {
            --primary-color: #1a237e;
            --secondary-color: #ffab00;
            --accent-color: #5c6bc0;
            --light-color: #f5f5f5;
            --dark-color: #121212;
            --text-color: #333;
            --text-light: #777;
            --transition: all 0.3s ease;
            --shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            --border-radius: 8px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: var(--text-color);
            line-height: 1.6;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 1rem;
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 3rem;
            text-align: center;
        }
        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 3px;
            background: var(--secondary-color);
        }
        .section-title.center:after {
            left: 50%;
            transform: translateX(-50%);
        }
        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            padding: 12px 30px;
            border-radius: var(--border-radius);
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-primary:hover {
            background-color: var(--accent-color);
            border-color: var(--accent-color);
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }
        .btn-secondary {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
            color: #000;
            padding: 12px 30px;
            border-radius: var(--border-radius);
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-secondary:hover {
            background-color: #ff8f00;
            border-color: #ff8f00;
            color: #000;
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.95);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            padding: 15px 0;
            transition: var(--transition);
        }
        .navbar.scrolled {
            padding: 10px 0;
            background-color: rgba(255, 255, 255, 0.98);
        }
        .navbar-brand {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary-color);
        }
        .navbar-brand span {
            color: var(--secondary-color);
        }
        .nav-link {
            font-weight: 500;
            margin: 0 10px;
            color: var(--text-color);
            transition: var(--transition);
            position: relative;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary-color);
        }
        .nav-link:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary-color);
            transition: var(--transition);
        }
        .nav-link:hover:after, .nav-link.active:after {
            width: 100%;
        }
        .hero {
            background: linear-gradient(rgba(26, 35, 126, 0.85), rgba(26, 35, 126, 0.9)), url('https://images.unsplash.com/photo-1542744095-fcf48d80b0fd?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 150px 0 120px;
            position: relative;
        }
        .hero h1 {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 1.5rem;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
        }
        .hero p {
            font-size: 1.2rem;
            margin-bottom: 2rem;
            max-width: 700px;
        }
        .service-card {
            background: white;
            border-radius: var(--border-radius);
            padding: 30px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            height: 100%;
            border-top: 4px solid var(--primary-color);
        }
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }
        .service-icon {
            width: 70px;
            height: 70px;
            background: var(--light-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            color: var(--primary-color);
            font-size: 1.8rem;
        }
        .portfolio-item {
            position: relative;
            border-radius: var(--border-radius);
            overflow: hidden;
            margin-bottom: 30px;
            box-shadow: var(--shadow);
        }
        .portfolio-img {
            width: 100%;
            height: 300px;
            object-fit: cover;
            transition: var(--transition);
        }
        .portfolio-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            background: linear-gradient(to top, rgba(26, 35, 126, 0.9), transparent);
            color: white;
            padding: 30px;
            transform: translateY(100%);
            transition: var(--transition);
        }
        .portfolio-item:hover .portfolio-overlay {
            transform: translateY(0);
        }
        .portfolio-item:hover .portfolio-img {
            transform: scale(1.05);
        }
        .team-member {
            background: white;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            margin-bottom: 30px;
        }
        .team-member:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }
        .team-img {
            width: 100%;
            height: 280px;
            object-fit: cover;
        }
        .team-info {
            padding: 25px;
        }
        .testimonial-card {
            background: white;
            border-radius: var(--border-radius);
            padding: 30px;
            box-shadow: var(--shadow);
            margin-bottom: 30px;
            position: relative;
        }
        .testimonial-card:before {
            content: '"';
            position: absolute;
            top: 10px;
            left: 20px;
            font-size: 5rem;
            color: var(--light-color);
            font-family: Georgia, serif;
            line-height: 1;
        }
        .client-info {
            display: flex;
            align-items: center;
            margin-top: 20px;
        }
        .client-img {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            object-fit: cover;
            margin-right: 15px;
            border: 3px solid var(--light-color);
        }
        .friendlink {
            background-color: var(--light-color);
            padding: 60px 0;
        }
        .flink {
            display: inline-block;
            background: white;
            padding: 12px 25px;
            border-radius: 50px;
            margin: 8px;
            color: var(--text-color);
            text-decoration: none;
            transition: var(--transition);
            border: 1px solid #eee;
            font-weight: 500;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }
        .footer {
            background-color: var(--dark-color);
            color: white;
            padding: 70px 0 30px;
        }
        .footer h5 {
            color: white;
            margin-bottom: 25px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer h5:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 2px;
            background: var(--secondary-color);
        }
        .footer-links a {
            color: #ccc;
            text-decoration: none;
            display: block;
            margin-bottom: 10px;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--secondary-color);
            padding-left: 5px;
        }
        .contact-info li {
            display: flex;
            align-items: flex-start;
            margin-bottom: 15px;
            color: #ccc;
        }
        .contact-info i {
            color: var(--secondary-color);
            margin-right: 15px;
            margin-top: 5px;
        }
        .copyright {
            border-top: 1px solid #333;
            padding-top: 20px;
            margin-top: 50px;
            text-align: center;
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .hero h1 {
                font-size: 2.8rem;
            }
            .hero {
                padding: 120px 0 80px;
            }
        }
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.2rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .navbar-brand {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 576px) {
            .hero {
                padding: 100px 0 60px;
            }
            .hero h1 {
                font-size: 1.8rem;
            }
            .btn-primary, .btn-secondary {
                padding: 10px 20px;
            }
        }
        .fade-in {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.8s ease, transform 0.8s ease;
        }
        .fade-in.visible {
            opacity: 1;
            transform: translateY(0);
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            text-decoration: none;
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: var(--accent-color);
            color: white;
            transform: translateY(-5px);
        }