:root {
            --primary-color: #1a237e;
            --secondary-color: #3949ab;
            --accent-color: #00bcd4;
            --light-color: #f5f7ff;
            --dark-color: #0d1530;
            --text-color: #333;
            --border-radius: 8px;
            --box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: var(--text-color);
            line-height: 1.8;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5 {
            color: var(--dark-color);
            font-weight: 700;
            margin-bottom: 1.5rem;
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.98);
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
            padding: 1rem 0;
            transition: var(--transition);
        }
        .navbar-nav .nav-link {
            color: var(--dark-color) !important;
            font-weight: 500;
            padding: 0.5rem 1.2rem !important;
            transition: var(--transition);
            position: relative;
        }
        .navbar-nav .nav-link:hover, .navbar-nav .nav-link.active {
            color: var(--accent-color) !important;
        }
        .navbar-nav .nav-link:hover:after, .navbar-nav .nav-link.active:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 1.2rem;
            right: 1.2rem;
            height: 2px;
            background-color: var(--accent-color);
        }
        .hero-section {
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 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('https://images.unsplash.com/photo-1611974789855-9c2a0a7236a3?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover no-repeat;
            opacity: 0.15;
        }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }
        .hero-subtitle {
            font-size: 1.2rem;
            margin-bottom: 2.5rem;
            opacity: 0.9;
            max-width: 700px;
        }
        .btn-primary-custom {
            background-color: var(--accent-color);
            border: none;
            color: white;
            padding: 0.8rem 2.5rem;
            border-radius: var(--border-radius);
            font-weight: 600;
            transition: var(--transition);
            box-shadow: 0 4px 15px rgba(0, 188, 212, 0.3);
        }
        .btn-primary-custom:hover {
            background-color: #00a5bb;
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(0, 188, 212, 0.4);
            color: white;
        }
        .btn-outline-light-custom {
            border: 2px solid rgba(255, 255, 255, 0.7);
            color: white;
            padding: 0.8rem 2.5rem;
            border-radius: var(--border-radius);
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-outline-light-custom:hover {
            background-color: white;
            color: var(--primary-color);
            border-color: white;
        }
        .section-padding {
            padding: 5rem 0;
        }
        .section-title {
            position: relative;
            padding-bottom: 1rem;
            margin-bottom: 3rem;
        }
        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 80px;
            height: 4px;
            background-color: var(--accent-color);
            border-radius: 2px;
        }
        .section-title.text-center:after {
            left: 50%;
            transform: translateX(-50%);
        }
        .card-hover {
            transition: var(--transition);
            border: none;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            height: 100%;
        }
        .card-hover:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }
        .card-icon {
            font-size: 3rem;
            color: var(--accent-color);
            margin-bottom: 1.5rem;
        }
        .service-card {
            border-top: 4px solid var(--accent-color);
        }
        .feature-list li {
            margin-bottom: 1rem;
            padding-left: 2rem;
            position: relative;
        }
        .feature-list li:before {
            content: '\f00c';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            left: 0;
            color: var(--accent-color);
        }
        .stats-section {
            background-color: var(--light-color);
        }
        .stat-number {
            font-size: 3.5rem;
            font-weight: 800;
            color: var(--primary-color);
            line-height: 1;
        }
        .stat-title {
            font-size: 1.1rem;
            color: var(--secondary-color);
            font-weight: 600;
            margin-top: 0.5rem;
        }
        .process-step {
            position: relative;
            padding: 2.5rem 1.5rem;
            background-color: white;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            text-align: center;
            transition: var(--transition);
            height: 100%;
        }
        .process-step:hover {
            transform: translateY(-5px);
        }
        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 60px;
            height: 60px;
            background-color: var(--accent-color);
            color: white;
            font-size: 1.8rem;
            font-weight: 700;
            border-radius: 50%;
            margin-bottom: 1.5rem;
        }
        .team-card {
            text-align: center;
            overflow: hidden;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            transition: var(--transition);
        }
        .team-card:hover {
            transform: translateY(-10px);
        }
        .team-img {
            height: 280px;
            object-fit: cover;
            transition: var(--transition);
        }
        .team-card:hover .team-img {
            transform: scale(1.05);
        }
        .team-info {
            padding: 1.8rem;
            background-color: white;
        }
        .testimonial-card {
            background-color: white;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            padding: 2.5rem;
            height: 100%;
            position: relative;
        }
        .testimonial-card:before {
            content: '\f10d';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            top: 1.5rem;
            left: 1.5rem;
            font-size: 2.5rem;
            color: rgba(0, 188, 212, 0.1);
        }
        .client-img {
            width: 70px;
            height: 70px;
            border-radius: 50%;
            object-fit: cover;
            border: 3px solid var(--light-color);
        }
        .news-card {
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--box-shadow);
            transition: var(--transition);
            height: 100%;
        }
        .news-card:hover {
            transform: translateY(-10px);
        }
        .news-img {
            height: 220px;
            object-fit: cover;
            transition: var(--transition);
        }
        .news-card:hover .news-img {
            transform: scale(1.05);
        }
        .news-content {
            padding: 1.8rem;
            background-color: white;
        }
        .news-date {
            color: var(--accent-color);
            font-weight: 600;
            font-size: 0.9rem;
        }
        .flink {
            display: inline-block;
            padding: 0.5rem 1.2rem;
            margin: 0.3rem;
            background-color: var(--light-color);
            color: var(--dark-color);
            border-radius: 50px;
            text-decoration: none;
            transition: var(--transition);
            font-weight: 500;
        }
        .flink:hover {
            background-color: var(--accent-color);
            color: white;
            transform: translateY(-3px);
        }
        .contact-info-card {
            padding: 2rem;
            background-color: white;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            height: 100%;
            text-align: center;
            transition: var(--transition);
        }
        .contact-info-card:hover {
            transform: translateY(-5px);
        }
        .contact-icon {
            font-size: 2.5rem;
            color: var(--accent-color);
            margin-bottom: 1.5rem;
        }
        footer {
            background-color: var(--dark-color);
            color: #b0b7c3;
            padding-top: 4rem;
        }
        .footer-title {
            color: white;
            font-size: 1.3rem;
            margin-bottom: 1.8rem;
            position: relative;
            padding-bottom: 0.8rem;
        }
        .footer-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 2px;
            background-color: var(--accent-color);
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #b0b7c3;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent-color);
            padding-left: 5px;
        }
        .social-icons a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background-color: rgba(255, 255, 255, 0.08);
            color: white;
            border-radius: 50%;
            margin-right: 0.8rem;
            transition: var(--transition);
        }
        .social-icons a:hover {
            background-color: var(--accent-color);
            transform: translateY(-5px);
        }
        .copyright {
            background-color: rgba(0, 0, 0, 0.2);
            padding: 1.5rem 0;
            margin-top: 4rem;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background-color: var(--accent-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            z-index: 999;
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background-color: var(--primary-color);
            color: white;
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }
            .section-padding {
                padding: 3rem 0;
            }
            .navbar-nav .nav-link {
                padding: 0.5rem 0 !important;
            }
            .navbar-nav .nav-link:hover:after, .navbar-nav .nav-link.active:after {
                left: 0;
                right: auto;
                width: 40px;
            }
        }