:root {
            --primary-color: #1a5fb4;
            --secondary-color: #26a269;
            --accent-color: #e5a50a;
            --light-color: #f8f9fa;
            --dark-color: #2c2c2c;
            --text-color: #333;
            --border-radius: 8px;
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Helvetica Neue', 'Microsoft YaHei', Arial, sans-serif;
            color: var(--text-color);
            line-height: 1.7;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 600;
            color: var(--dark-color);
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.95);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            padding-top: 0.8rem;
            padding-bottom: 0.8rem;
            transition: var(--transition);
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .nav-link {
            font-weight: 500;
            margin: 0 0.5rem;
            color: var(--dark-color) !important;
            transition: var(--transition);
            position: relative;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary-color) !important;
        }
        .nav-link:hover:after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: var(--primary-color);
        }
        .hero-section {
            background: linear-gradient(rgba(26, 95, 180, 0.85), rgba(38, 162, 105, 0.8)), url('https://images.unsplash.com/photo-1579684385127-1ef15d508118?ixlib=rb-4.0.3&auto=format&fit=crop&w=1600&q=80') center/cover no-repeat;
            color: white;
            padding: 8rem 0;
            text-align: center;
        }
        .hero-section h1 {
            font-size: 3.5rem;
            margin-bottom: 1.5rem;
            color: white;
            text-shadow: 1px 1px 3px rgba(0,0,0,0.3);
        }
        .section-title {
            text-align: center;
            margin-bottom: 3rem;
            position: relative;
            padding-bottom: 1rem;
        }
        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background-color: var(--secondary-color);
            border-radius: 2px;
        }
        .service-card, .article-card, .case-card {
            border: none;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: var(--transition);
            height: 100%;
            background-color: white;
        }
        .service-card:hover, .article-card:hover, .case-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        .service-icon {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 1.5rem;
        }
        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            padding: 0.75rem 2rem;
            border-radius: 50px;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-primary:hover {
            background-color: #0d4a9c;
            border-color: #0d4a9c;
            transform: translateY(-2px);
        }
        .btn-secondary {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
            color: white;
            padding: 0.75rem 2rem;
            border-radius: 50px;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-secondary:hover {
            background-color: #1e8c50;
            border-color: #1e8c50;
            transform: translateY(-2px);
        }
        .stat-item {
            text-align: center;
            padding: 2rem;
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 700;
            color: var(--primary-color);
            display: block;
            line-height: 1;
        }
        .stat-label {
            font-size: 1.1rem;
            color: var(--dark-color);
            margin-top: 0.5rem;
        }
        footer {
            background-color: var(--dark-color);
            color: var(--light-color);
            padding-top: 4rem;
            padding-bottom: 2rem;
        }
        .footer-links h5 {
            color: white;
            margin-bottom: 1.5rem;
            position: relative;
            padding-bottom: 0.75rem;
        }
        .footer-links h5:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 3px;
            background-color: var(--secondary-color);
        }
        .footer-links ul {
            list-style: none;
            padding-left: 0;
        }
        .footer-links li {
            margin-bottom: 0.75rem;
        }
        .footer-links a {
            color: #bbb;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        .friendlink-container {
            background-color: #3a3a3a;
            border-radius: var(--border-radius);
            padding: 2rem;
            margin-top: 2rem;
        }
        .flink {
            display: inline-block;
            background-color: #4a4a4a;
            color: #ddd;
            padding: 0.5rem 1.5rem;
            margin: 0.5rem;
            border-radius: 50px;
            text-decoration: none;
            transition: var(--transition);
            border: 1px solid transparent;
        }
        .flink:hover {
            background-color: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
            transform: translateY(-3px);
        }
        .contact-info i {
            color: var(--secondary-color);
            margin-right: 10px;
            width: 20px;
        }
        .copyright {
            border-top: 1px solid #444;
            padding-top: 2rem;
            margin-top: 3rem;
            text-align: center;
            color: #aaa;
            font-size: 0.9rem;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background-color: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            z-index: 1000;
            box-shadow: 0 3px 10px rgba(0,0,0,0.2);
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background-color: var(--secondary-color);
            transform: translateY(-5px);
        }
        @media (max-width: 768px) {
            .hero-section h1 {
                font-size: 2.5rem;
            }
            .hero-section {
                padding: 5rem 0;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .navbar-collapse {
                background-color: white;
                padding: 1rem;
                border-radius: var(--border-radius);
                box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            }
        }
        .article-meta {
            color: #777;
            font-size: 0.9rem;
            margin-bottom: 1rem;
        }
        .form-control {
            border-radius: var(--border-radius);
            padding: 0.75rem 1rem;
            border: 1px solid #ddd;
        }
        .form-control:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 0.25rem rgba(26, 95, 180, 0.25);
        }