:root {
            --primary-color: #1a365d;
            --secondary-color: #0ea5e9;
            --accent-color: #10b981;
            --light-bg: #f8fafc;
            --dark-text: #1e293b;
            --light-text: #64748b;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: var(--dark-text);
            line-height: 1.7;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5 {
            font-weight: 700;
            color: var(--primary-color);
        }
        .section-header {
            margin-bottom: 3rem;
            text-align: center;
        }
        .section-header h2 {
            font-size: 2.5rem;
            position: relative;
            display: inline-block;
            padding-bottom: 15px;
        }
        .section-header h2:after {
            content: '';
            position: absolute;
            width: 70px;
            height: 4px;
            background: var(--secondary-color);
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
        }
        .section-header p {
            color: var(--light-text);
            max-width: 700px;
            margin: 1rem auto 0;
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.95);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
            padding: 1rem 0;
            transition: all 0.3s ease;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .navbar-brand span {
            color: var(--secondary-color);
        }
        .nav-link {
            font-weight: 600;
            color: var(--primary-color) !important;
            margin: 0 0.5rem;
            transition: color 0.3s ease;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--secondary-color) !important;
        }
        .hero-section {
            background: linear-gradient(rgba(26, 54, 93, 0.85), rgba(26, 54, 93, 0.9)), 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');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            color: white;
            padding: 10rem 0 8rem;
            position: relative;
        }
        .hero-content h1 {
            font-size: 3.5rem;
            color: white;
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }
        .hero-content p {
            font-size: 1.2rem;
            margin-bottom: 2.5rem;
            max-width: 700px;
        }
        .btn-primary {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
            padding: 0.75rem 2rem;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .btn-primary:hover {
            background-color: #0284c7;
            border-color: #0284c7;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(14, 165, 233, 0.2);
        }
        .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 0.4s ease;
            border: 1px solid #f1f5f9;
        }
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
            border-color: var(--secondary-color);
        }
        .service-icon {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, var(--secondary-color), #38bdf8);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
            color: white;
            font-size: 2rem;
        }
        .case-item {
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            margin-bottom: 2rem;
            background: white;
            transition: all 0.3s ease;
        }
        .case-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.12);
        }
        .case-img {
            height: 250px;
            overflow: hidden;
        }
        .case-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .case-item:hover .case-img img {
            transform: scale(1.05);
        }
        .team-card {
            text-align: center;
            padding: 2rem;
            border-radius: 12px;
            background: white;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
        }
        .team-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
        }
        .team-img {
            width: 150px;
            height: 150px;
            border-radius: 50%;
            margin: 0 auto 1.5rem;
            overflow: hidden;
            border: 5px solid #f1f5f9;
        }
        .team-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .stats-section {
            background: linear-gradient(135deg, var(--primary-color), #2d4a7c);
            color: white;
            padding: 5rem 0;
        }
        .stat-item {
            text-align: center;
        }
        .stat-number {
            font-size: 3.5rem;
            font-weight: 800;
            color: var(--secondary-color);
            margin-bottom: 0.5rem;
        }
        .news-card {
            border-radius: 12px;
            overflow: hidden;
            background: white;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
            height: 100%;
        }
        .news-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
        }
        .news-date {
            position: absolute;
            top: 20px;
            left: 20px;
            background: var(--secondary-color);
            color: white;
            padding: 0.5rem 1rem;
            border-radius: 6px;
            font-weight: 600;
        }
        .contact-info {
            background: var(--light-bg);
            border-radius: 12px;
            padding: 2.5rem;
            height: 100%;
        }
        .contact-item {
            display: flex;
            align-items: flex-start;
            margin-bottom: 2rem;
        }
        .contact-icon {
            width: 60px;
            height: 60px;
            background: var(--secondary-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.5rem;
            margin-right: 1.5rem;
            flex-shrink: 0;
        }
        .friendlink {
            background: var(--light-bg);
            padding: 4rem 0;
        }
        .flink {
            display: inline-block;
            background: white;
            padding: 1rem 1.5rem;
            border-radius: 8px;
            margin: 0.5rem;
            color: var(--dark-text);
            text-decoration: none;
            font-weight: 600;
            transition: all 0.3s ease;
            border: 2px solid transparent;
        }
        .flink:hover {
            border-color: var(--secondary-color);
            color: var(--secondary-color);
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
        }
        .footer {
            background: var(--primary-color);
            color: #cbd5e1;
            padding: 4rem 0 2rem;
        }
        .footer h5 {
            color: white;
            margin-bottom: 1.5rem;
            font-size: 1.2rem;
        }
        .footer-links a {
            color: #cbd5e1;
            text-decoration: none;
            display: block;
            margin-bottom: 0.8rem;
            transition: color 0.3s ease;
        }
        .footer-links a:hover {
            color: var(--secondary-color);
        }
        .copyright {
            border-top: 1px solid #334155;
            padding-top: 2rem;
            margin-top: 3rem;
            text-align: center;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .hero-content h1 {
                font-size: 2.8rem;
            }
            .section-header h2 {
                font-size: 2.2rem;
            }
        }
        @media (max-width: 768px) {
            .hero-content h1 {
                font-size: 2.3rem;
            }
            .hero-section {
                padding: 8rem 0 6rem;
            }
            .section-header h2 {
                font-size: 2rem;
            }
            .stat-number {
                font-size: 2.8rem;
            }
        }
        @media (max-width: 576px) {
            .hero-content h1 {
                font-size: 1.8rem;
            }
            .section-header h2 {
                font-size: 1.8rem;
            }
            .service-card, .contact-info {
                padding: 1.5rem;
            }
        }