:root {
            --primary-color: #1a56db;
            --secondary-color: #7e3af2;
            --accent-color: #f59e0b;
            --dark-color: #1f2937;
            --light-color: #f9fafb;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            line-height: 1.7;
            color: #333;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5 {
            font-weight: 700;
            color: var(--dark-color);
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.98);
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
            padding: 0.8rem 0;
            transition: all 0.3s ease;
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .nav-link {
            font-weight: 600;
            padding: 0.5rem 1.2rem !important;
            color: var(--dark-color) !important;
            transition: all 0.2s ease;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary-color) !important;
            transform: translateY(-2px);
        }
        .hero-section {
            background: linear-gradient(135deg, #1a56db 0%, #7e3af2 100%);
            color: white;
            padding: 6rem 0 5rem;
            position: relative;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: url('https://images.unsplash.com/photo-1551434678-e076c223a692?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80');
            background-size: cover;
            background-position: center;
            opacity: 0.15;
            z-index: 0;
        }
        .hero-content {
            position: relative;
            z-index: 1;
        }
        .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: linear-gradient(to right, var(--primary-color), var(--secondary-color));
            border-radius: 2px;
        }
        .section-title.center::after {
            left: 50%;
            transform: translateX(-50%);
        }
        .service-card {
            background: white;
            border-radius: 12px;
            padding: 2.5rem 2rem;
            height: 100%;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
            border: 1px solid rgba(0, 0, 0, 0.05);
        }
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
            border-color: var(--primary-color);
        }
        .service-icon {
            width: 70px;
            height: 70px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
            color: white;
            font-size: 1.8rem;
        }
        .stats-card {
            text-align: center;
            padding: 2rem;
            border-radius: 12px;
            background: white;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
        }
        .stats-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        .stats-number {
            font-size: 3rem;
            font-weight: 800;
            color: var(--primary-color);
            line-height: 1;
            margin-bottom: 0.5rem;
        }
        .team-card {
            background: white;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            transition: all 0.3s ease;
        }
        .team-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
        }
        .team-img {
            height: 280px;
            object-fit: cover;
            width: 100%;
        }
        .contact-info-card {
            background: white;
            border-radius: 12px;
            padding: 2rem;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            height: 100%;
            border-left: 5px solid var(--primary-color);
        }
        .footer {
            background-color: var(--dark-color);
            color: #e5e7eb;
            padding: 4rem 0 2rem;
        }
        .footer a {
            color: #d1d5db;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        .footer a:hover {
            color: white;
        }
        .friendlink {
            background-color: #f8fafc;
            padding: 4rem 0;
        }
        .flink {
            display: inline-block;
            background: white;
            padding: 0.8rem 1.5rem;
            margin: 0.5rem;
            border-radius: 8px;
            color: var(--dark-color);
            text-decoration: none;
            font-weight: 500;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
            border: 1px solid #e5e7eb;
        }
        .flink:hover {
            background-color: var(--primary-color);
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 10px 25px rgba(26, 86, 219, 0.2);
            border-color: var(--primary-color);
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            border: none;
            padding: 0.8rem 2rem;
            border-radius: 8px;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 25px rgba(26, 86, 219, 0.3);
        }
        .btn-outline-primary {
            border-color: var(--primary-color);
            color: var(--primary-color);
            padding: 0.8rem 2rem;
            border-radius: 8px;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .btn-outline-primary:hover {
            background-color: var(--primary-color);
            transform: translateY(-3px);
            box-shadow: 0 10px 25px rgba(26, 86, 219, 0.3);
        }
        .timeline {
            position: relative;
            padding-left: 3rem;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 4px;
            background: linear-gradient(to bottom, var(--primary-color), var(--secondary-color));
            border-radius: 2px;
        }
        .timeline-item {
            position: relative;
            margin-bottom: 2.5rem;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -3.4rem;
            top: 0.5rem;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background-color: var(--primary-color);
            border: 4px solid white;
            box-shadow: 0 0 0 4px rgba(26, 86, 219, 0.2);
        }
        .testimonial-card {
            background: white;
            border-radius: 12px;
            padding: 2.5rem;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            position: relative;
            margin-top: 2rem;
        }
        .testimonial-card::before {
            content: "\201C";
            font-size: 8rem;
            color: rgba(26, 86, 219, 0.1);
            position: absolute;
            top: -2rem;
            left: 1rem;
            line-height: 1;
            font-family: serif;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 4rem 0 3rem;
            }
            .section-title {
                margin-bottom: 2rem;
            }
            .service-card, .team-card {
                margin-bottom: 1.5rem;
            }
        }
        .back-to-top {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: var(--primary-color);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            text-decoration: none;
            box-shadow: 0 5px 20px rgba(26, 86, 219, 0.3);
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background-color: var(--secondary-color);
            transform: translateY(-5px);
        }