:root {
            --primary-color: #1a56db;
            --secondary-color: #0e9f6e;
            --dark-color: #1f2937;
            --light-color: #f9fafb;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        }
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif;
            color: #333;
            line-height: 1.8;
            overflow-x: hidden;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color);
        }
        .hero-section {
            background: linear-gradient(135deg, #1a56db 0%, #0e9f6e 100%);
            color: white;
            padding: 8rem 0;
            position: relative;
            overflow: hidden;
        }
        .hero-section h1 {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 1.5rem;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
        }
        .section-title {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--dark-color);
            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: var(--secondary-color);
            border-radius: 2px;
        }
        .card {
            border: none;
            border-radius: 15px;
            overflow: hidden;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            height: 100%;
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: var(--shadow);
        }
        .card-icon {
            font-size: 3rem;
            color: var(--primary-color);
            margin-bottom: 1.5rem;
        }
        .btn-primary {
            background-color: var(--primary-color);
            border: none;
            padding: 0.75rem 2rem;
            border-radius: 50px;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .btn-primary:hover {
            background-color: #1546b3;
            transform: scale(1.05);
        }
        .service-item, .case-item {
            transition: all 0.3s ease;
        }
        .service-item:hover, .case-item:hover {
            background-color: #f8f9fa;
            border-radius: 10px;
            padding: 1rem;
        }
        .footer {
            background-color: var(--dark-color);
            color: white;
            padding: 4rem 0 2rem;
        }
        .footer a {
            color: #d1d5db;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        .footer a:hover {
            color: white;
            text-decoration: underline;
        }
        .friendlink {
            background-color: #f3f4f6;
            padding: 3rem 0;
        }
        .flink {
            display: inline-block;
            margin: 0.5rem 1rem;
            padding: 0.5rem 1.5rem;
            background-color: white;
            border-radius: 50px;
            color: var(--dark-color);
            text-decoration: none;
            border: 2px solid #e5e7eb;
            transition: all 0.3s ease;
            font-weight: 500;
        }
        .flink:hover {
            background-color: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
            transform: translateY(-3px);
        }
        .contact-info li {
            margin-bottom: 1rem;
            font-size: 1.1rem;
        }
        .contact-info i {
            color: var(--secondary-color);
            margin-right: 10px;
            width: 24px;
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: 10px;
            transition: transform 0.5s ease;
        }
        img:hover {
            transform: scale(1.02);
        }
        .sticky-top {
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        @media (max-width: 768px) {
            .hero-section h1 {
                font-size: 2.5rem;
            }
            .section-title {
                font-size: 2rem;
            }
            .hero-section {
                padding: 5rem 0;
            }
        }