:root {
            --primary-color: #2c5aa0;
            --secondary-color: #f8f9fa;
            --accent-color: #ff6b35;
            --dark-color: #343a40;
            --light-color: #ffffff;
        }
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', system-ui, sans-serif;
            color: #333;
            overflow-x: hidden;
        }
        .navbar-brand {
            font-weight: 700;
            color: var(--primary-color);
        }
        .hero-section {
            background: linear-gradient(135deg, var(--primary-color) 0%, #1a3a6e 100%);
            color: white;
            padding: 120px 0;
            position: relative;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            width: 200%;
            height: 200%;
            top: -50%;
            left: -50%;
            background: radial-gradient(circle, rgba(255,255,255,0.1) 1px, transparent 1px);
            background-size: 50px 50px;
            transform: rotate(15deg);
            opacity: 0.3;
            animation: backgroundMove 20s linear infinite;
        }
        @keyframes backgroundMove {
            0% { transform: rotate(15deg) translateX(0); }
            100% { transform: rotate(15deg) translateX(50px); }
        }
        .service-card {
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            border: none;
            border-radius: 12px;
            overflow: hidden;
            height: 100%;
        }
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }
        .service-icon {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, var(--primary-color), #4a7bc8);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            color: white;
            font-size: 32px;
        }
        .stats-section {
            background-color: var(--secondary-color);
            padding: 80px 0;
        }
        .stat-item h3 {
            color: var(--primary-color);
            font-size: 2.8rem;
            font-weight: 700;
        }
        .case-study-img {
            height: 300px;
            object-fit: cover;
            border-radius: 8px;
            transition: transform 0.5s ease;
        }
        .case-study-item:hover .case-study-img {
            transform: scale(1.03);
        }
        .team-member {
            text-align: center;
            margin-bottom: 30px;
        }
        .team-img {
            width: 180px;
            height: 180px;
            border-radius: 50%;
            object-fit: cover;
            border: 5px solid var(--secondary-color);
            margin-bottom: 15px;
        }
        .contact-section {
            background: linear-gradient(135deg, #1a3a6e 0%, var(--primary-color) 100%);
            color: white;
        }
        .contact-form .form-control {
            border-radius: 8px;
            border: 1px solid #ddd;
            padding: 12px 15px;
        }
        .contact-form .form-control:focus {
            border-color: var(--accent-color);
            box-shadow: 0 0 0 0.25rem rgba(255, 107, 53, 0.25);
        }
        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            padding: 12px 30px;
            border-radius: 8px;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .btn-primary:hover {
            background-color: #1a3a6e;
            border-color: #1a3a6e;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .btn-accent {
            background-color: var(--accent-color);
            border-color: var(--accent-color);
            color: white;
        }
        .btn-accent:hover {
            background-color: #e05a2b;
            border-color: #e05a2b;
        }
        .footer {
            background-color: var(--dark-color);
            color: #adb5bd;
            padding: 60px 0 20px;
        }
        .footer a {
            color: #adb5bd;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        .footer a:hover {
            color: white;
            text-decoration: underline;
        }
        .social-links a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: #495057;
            color: white;
            margin-right: 10px;
            transition: background-color 0.3s ease;
        }
        .social-links a:hover {
            background-color: var(--accent-color);
            text-decoration: none;
        }
        .flink {
            display: inline-block;
            padding: 8px 20px;
            margin: 5px 10px 5px 0;
            background-color: #e9ecef;
            border-radius: 20px;
            color: #495057;
            text-decoration: none;
            transition: all 0.3s ease;
            border: 1px solid #dee2e6;
        }
        .flink:hover {
            background-color: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
            transform: translateY(-3px);
            text-decoration: none;
        }
        .friendlink {
            background-color: var(--secondary-color);
            padding: 60px 0;
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 50px;
            text-align: center;
        }
        .section-title::after {
            content: '';
            position: absolute;
            width: 80px;
            height: 4px;
            background-color: var(--accent-color);
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
        }
        .timeline {
            position: relative;
            max-width: 1200px;
            margin: 0 auto;
        }
        .timeline::after {
            content: '';
            position: absolute;
            width: 6px;
            background-color: var(--primary-color);
            top: 0;
            bottom: 0;
            left: 50%;
            margin-left: -3px;
        }
        .timeline-item {
            padding: 10px 40px;
            position: relative;
            width: 50%;
            box-sizing: border-box;
        }
        .timeline-item:nth-child(odd) {
            left: 0;
        }
        .timeline-item:nth-child(even) {
            left: 50%;
        }
        .timeline-content {
            padding: 20px 30px;
            background-color: white;
            position: relative;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .timeline-item:nth-child(odd) .timeline-content::after {
            content: " ";
            height: 0;
            position: absolute;
            top: 22px;
            width: 0;
            z-index: 1;
            right: -15px;
            border: medium solid white;
            border-width: 10px 0 10px 10px;
            border-color: transparent transparent transparent white;
        }
        .timeline-item:nth-child(even) .timeline-content::after {
            content: " ";
            height: 0;
            position: absolute;
            top: 22px;
            width: 0;
            z-index: 1;
            left: -15px;
            border: medium solid white;
            border-width: 10px 10px 10px 0;
            border-color: transparent white transparent transparent;
        }
        @media screen and (max-width: 768px) {
            .timeline::after {
                left: 31px;
            }
            .timeline-item {
                width: 100%;
                padding-left: 70px;
                padding-right: 25px;
            }
            .timeline-item:nth-child(even) {
                left: 0;
            }
            .timeline-item:nth-child(odd) .timeline-content::after,
            .timeline-item:nth-child(even) .timeline-content::after {
                left: -15px;
                border-width: 10px 10px 10px 0;
                border-color: transparent white transparent transparent;
                right: auto;
            }
        }