:root {
            --primary-blue: #0056b3;
            --secondary-blue: #0d6efd;
            --accent-teal: #20c997;
            --dark-gray: #343a40;
            --light-gray: #f8f9fa;
        }
        body {
            font-family: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
            color: #333;
            line-height: 1.6;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            color: var(--dark-gray);
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.95);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            padding: 0.8rem 0;
            transition: all 0.3s ease;
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            color: var(--primary-blue) !important;
        }
        .nav-link {
            font-weight: 500;
            margin: 0 0.5rem;
            color: var(--dark-gray) !important;
            transition: color 0.3s;
        }
        .nav-link:hover {
            color: var(--primary-blue) !important;
        }
        .hero-section {
            background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-teal) 100%);
            color: white;
            padding: 6rem 0 5rem;
            position: relative;
            overflow: hidden;
        }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 1.5rem;
            text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
        }
        .hero-subtitle {
            font-size: 1.3rem;
            margin-bottom: 2rem;
            opacity: 0.9;
        }
        .btn-primary {
            background-color: var(--secondary-blue);
            border: none;
            padding: 0.8rem 2rem;
            border-radius: 50px;
            font-weight: 600;
            transition: all 0.3s;
        }
        .btn-primary:hover {
            background-color: var(--primary-blue);
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0, 86, 179, 0.3);
        }
        .section-title {
            position: relative;
            margin-bottom: 3rem;
            padding-bottom: 1rem;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background-color: var(--accent-teal);
            border-radius: 2px;
        }
        .service-card {
            border: none;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            transition: transform 0.3s, box-shadow 0.3s;
            height: 100%;
            margin-bottom: 1.5rem;
        }
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }
        .service-icon {
            font-size: 2.5rem;
            color: var(--primary-blue);
            margin-bottom: 1.5rem;
        }
        .case-study-img {
            height: 250px;
            object-fit: cover;
            border-radius: 8px 8px 0 0;
        }
        .news-card {
            border-left: 4px solid var(--accent-teal);
            padding-left: 1.5rem;
            margin-bottom: 2rem;
            transition: all 0.3s;
        }
        .news-card:hover {
            border-left-width: 8px;
            padding-left: 1.3rem;
        }
        .partner-logo {
            filter: grayscale(100%);
            opacity: 0.7;
            transition: all 0.3s;
            max-height: 60px;
            width: auto;
        }
        .partner-logo:hover {
            filter: grayscale(0);
            opacity: 1;
        }
        .friendlink {
            background-color: var(--light-gray);
            padding: 4rem 0;
        }
        .flink {
            display: inline-block;
            background: white;
            padding: 0.8rem 1.5rem;
            margin: 0.5rem;
            border-radius: 50px;
            color: var(--dark-gray);
            text-decoration: none;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
            transition: all 0.3s;
            font-weight: 500;
        }
        .flink:hover {
            background-color: var(--primary-blue);
            color: white;
            transform: translateY(-3px);
        }
        footer {
            background-color: var(--dark-gray);
            color: rgba(255, 255, 255, 0.8);
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer-links a:hover {
            color: white;
        }
        .contact-info i {
            width: 20px;
            margin-right: 10px;
            color: var(--accent-teal);
        }
        .scroll-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background-color: var(--primary-blue);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            opacity: 0;
            transition: opacity 0.3s, transform 0.3s;
            z-index: 1000;
        }
        .scroll-top.show {
            opacity: 1;
        }
        .scroll-top:hover {
            transform: translateY(-5px);
            background-color: var(--secondary-blue);
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }
            .hero-subtitle {
                font-size: 1.1rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }