:root {
            --primary-color: #1a365d;
            --secondary-color: #0ea5e9;
            --accent-color: #10b981;
            --light-color: #f8fafc;
            --dark-color: #0f172a;
        }
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif;
            line-height: 1.8;
            color: #334155;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .navbar-brand span {
            color: var(--secondary-color);
        }
        .hero-section {
            background: linear-gradient(135deg, var(--primary-color) 0%, #2d3748 100%);
            color: white;
            padding: 120px 0;
            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-1558494949-ef010cbdcc31?ixlib=rb-4.0.3&auto=format&fit=crop&w=1350&q=80') center/cover no-repeat;
            opacity: 0.15;
        }
        .section-title {
            position: relative;
            padding-bottom: 20px;
            margin-bottom: 50px;
            text-align: center;
            font-weight: 700;
            color: var(--primary-color);
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--secondary-color);
            border-radius: 2px;
        }
        .service-card {
            border: none;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            height: 100%;
            overflow: hidden;
        }
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 40px rgba(14, 165, 233, 0.15);
        }
        .service-icon {
            width: 70px;
            height: 70px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--secondary-color), #38bdf8);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 25px;
            color: white;
            font-size: 28px;
        }
        .btn-primary {
            background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
            border: none;
            padding: 12px 30px;
            border-radius: 30px;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(14, 165, 233, 0.3);
        }
        .case-study-item {
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
            transition: transform 0.3s ease;
            height: 100%;
        }
        .case-study-item:hover {
            transform: scale(1.03);
        }
        .team-member {
            text-align: center;
            padding: 30px 20px;
            border-radius: 12px;
            transition: all 0.3s ease;
            background: white;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        .team-member:hover {
            background: var(--light-color);
            transform: translateY(-10px);
        }
        .team-member img {
            width: 150px;
            height: 150px;
            object-fit: cover;
            border-radius: 50%;
            border: 5px solid #e2e8f0;
            margin-bottom: 20px;
        }
        .contact-info-box {
            padding: 30px;
            border-radius: 12px;
            background: white;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            height: 100%;
            transition: transform 0.3s ease;
        }
        .contact-info-box:hover {
            transform: translateY(-5px);
        }
        .footer {
            background: var(--dark-color);
            color: #cbd5e1;
            padding: 70px 0 30px;
        }
        .footer a {
            color: #94a3b8;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        .footer a:hover {
            color: var(--secondary-color);
        }
        .friendlink {
            background-color: #f1f5f9;
            padding: 60px 0;
        }
        .flink {
            display: inline-block;
            padding: 10px 20px;
            margin: 8px 12px;
            background: white;
            border-radius: 8px;
            color: var(--primary-color);
            font-weight: 500;
            text-decoration: none;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
            border: 1px solid #e2e8f0;
        }
        .flink:hover {
            background: var(--secondary-color);
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(14, 165, 233, 0.2);
        }
        .stat-number {
            font-size: 3.5rem;
            font-weight: 800;
            color: var(--primary-color);
            line-height: 1;
        }
        .timeline {
            position: relative;
            padding-left: 30px;
            border-left: 3px solid var(--secondary-color);
            margin-left: 15px;
        }
        .timeline-item {
            position: relative;
            margin-bottom: 40px;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -36px;
            top: 5px;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: var(--secondary-color);
            border: 4px solid white;
            box-shadow: 0 0 0 3px var(--secondary-color);
        }
        .news-card {
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.06);
            transition: all 0.3s ease;
            height: 100%;
            background: white;
        }
        .news-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
        }
        .news-card img {
            height: 220px;
            object-fit: cover;
            width: 100%;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 80px 0;
            }
            .stat-number {
                font-size: 2.5rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }