:root {
            --primary-color: #1a56db;
            --secondary-color: #0e9f6e;
            --dark-color: #1f2937;
            --light-color: #f9fafb;
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: #333;
            line-height: 1.6;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color);
        }
        .navbar-nav .nav-link {
            font-weight: 500;
            padding: 0.5rem 1rem;
            transition: var(--transition);
        }
        .navbar-nav .nav-link:hover {
            color: var(--primary-color);
            transform: translateY(-2px);
        }
        .hero-section {
            background: linear-gradient(135deg, rgba(26, 86, 219, 0.9) 0%, rgba(14, 159, 110, 0.85) 100%), url('https://images.unsplash.com/photo-1552664730-d307ca884978?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80') no-repeat center center/cover;
            color: white;
            padding: 120px 0;
        }
        .hero-section h1 {
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
        }
        @media (max-width: 768px) {
            .hero-section h1 {
                font-size: 2.5rem;
            }
            .hero-section {
                padding: 80px 0;
            }
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 3rem;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 70px;
            height: 4px;
            background: var(--primary-color);
        }
        .card {
            border: none;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            transition: var(--transition);
            height: 100%;
            border-radius: 12px;
            overflow: hidden;
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        .card-icon {
            width: 70px;
            height: 70px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary-color), #3b82f6);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.5rem;
            color: white;
            font-size: 1.8rem;
        }
        .feature-box {
            padding: 2.5rem;
            text-align: center;
            border-radius: 12px;
            background: white;
            box-shadow: 0 5px 20px rgba(0,0,0,0.05);
            transition: var(--transition);
            height: 100%;
        }
        .feature-box:hover {
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }
        .stats-section {
            background: linear-gradient(135deg, var(--dark-color) 0%, #374151 100%);
            color: white;
        }
        .stat-item h3 {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--secondary-color);
        }
        .portfolio-item {
            position: relative;
            overflow: hidden;
            border-radius: 12px;
            margin-bottom: 30px;
        }
        .portfolio-item img {
            transition: transform 0.5s ease;
            width: 100%;
            height: 300px;
            object-fit: cover;
        }
        .portfolio-item:hover img {
            transform: scale(1.05);
        }
        .portfolio-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(26, 86, 219, 0.85);
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            opacity: 0;
            transition: var(--transition);
            padding: 20px;
            color: white;
        }
        .portfolio-item:hover .portfolio-overlay {
            opacity: 1;
        }
        .team-member {
            text-align: center;
            margin-bottom: 30px;
        }
        .team-member img {
            width: 180px;
            height: 180px;
            border-radius: 50%;
            object-fit: cover;
            margin-bottom: 1rem;
            border: 5px solid #f0f9ff;
        }
        .contact-info-box {
            padding: 2rem;
            border-radius: 12px;
            background: white;
            box-shadow: 0 5px 20px rgba(0,0,0,0.08);
            text-align: center;
            margin-bottom: 1.5rem;
            transition: var(--transition);
        }
        .contact-info-box:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.15);
        }
        .contact-info-box i {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        .footer {
            background: var(--dark-color);
            color: #d1d5db;
            padding-top: 4rem;
        }
        .footer a {
            color: #d1d5db;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer a:hover {
            color: white;
            padding-left: 5px;
        }
        .copyright {
            border-top: 1px solid #374151;
            padding: 1.5rem 0;
            margin-top: 3rem;
        }
        .flink {
            display: inline-block;
            background: rgba(255,255,255,0.1);
            padding: 8px 20px;
            margin: 5px;
            border-radius: 50px;
            transition: var(--transition);
            color: #d1d5db;
            text-decoration: none;
        }
        .flink:hover {
            background: rgba(255,255,255,0.2);
            color: white;
            transform: translateY(-3px);
        }
        .btn-primary {
            background: linear-gradient(to right, var(--primary-color), #3b82f6);
            border: none;
            padding: 12px 30px;
            border-radius: 50px;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(26, 86, 219, 0.3);
        }
        .btn-secondary {
            background: linear-gradient(to right, var(--secondary-color), #0ea271);
            border: none;
            padding: 12px 30px;
            border-radius: 50px;
            font-weight: 600;
            transition: var(--transition);
            color: white;
        }
        .form-control:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 0.25rem rgba(26, 86, 219, 0.25);
        }
        .accordion-button:not(.collapsed) {
            background-color: rgba(26, 86, 219, 0.1);
            color: var(--primary-color);
            font-weight: 600;
        }
        .timeline {
            position: relative;
            padding-left: 30px;
            margin-left: 15px;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background: var(--primary-color);
        }
        .timeline-item {
            position: relative;
            margin-bottom: 2.5rem;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -36px;
            top: 5px;
            width: 15px;
            height: 15px;
            border-radius: 50%;
            background: var(--primary-color);
            border: 3px solid white;
            box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.2);
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--primary-color);
            color: white;
            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: #2563eb;
            transform: translateY(-5px);
        }
        .testimonial-slider {
            background: #f8fafc;
            border-radius: 15px;
            padding: 2.5rem;
        }
        .testimonial-img {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            object-fit: cover;
            margin: 0 auto 1.5rem;
            border: 3px solid var(--primary-color);
        }
        .breadcrumb {
            background-color: #f0f9ff;
            border-radius: 50px;
            padding: 12px 25px;
        }
        .breadcrumb-item.active {
            color: var(--primary-color);
            font-weight: 600;
        }