:root {
            --primary-color: #1a237e;
            --secondary-color: #4a148c;
            --accent-color: #00b0ff;
            --light-bg: #f8f9fa;
            --dark-text: #212529;
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif;
            color: var(--dark-text);
            overflow-x: hidden;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .nav-link {
            font-weight: 500;
            transition: var(--transition);
            margin: 0 5px;
        }
        .nav-link:hover {
            color: var(--accent-color) !important;
            transform: translateY(-2px);
        }
        .hero-section {
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
            color: white;
            padding: 120px 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);
        }
        .hero-section p {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto 2rem;
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            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(--accent-color);
            border-radius: 2px;
        }
        .card-hover {
            transition: var(--transition);
            border: none;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            height: 100%;
        }
        .card-hover:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        .service-icon {
            width: 70px;
            height: 70px;
            background: linear-gradient(45deg, var(--accent-color), var(--primary-color));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            color: white;
            font-size: 1.8rem;
        }
        .team-member {
            text-align: center;
            margin-bottom: 30px;
        }
        .team-img {
            width: 180px;
            height: 180px;
            border-radius: 50%;
            object-fit: cover;
            border: 5px solid #f0f0f0;
            margin-bottom: 20px;
            transition: var(--transition);
        }
        .team-member:hover .team-img {
            border-color: var(--accent-color);
        }
        .news-card {
            border-left: 4px solid var(--accent-color);
            padding-left: 20px;
            margin-bottom: 30px;
        }
        .contact-info-box {
            background: var(--light-bg);
            padding: 30px;
            border-radius: 10px;
            height: 100%;
            transition: var(--transition);
        }
        .contact-info-box:hover {
            background: white;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        }
        .contact-icon {
            font-size: 2rem;
            color: var(--accent-color);
            margin-bottom: 15px;
        }
        .flink {
            display: inline-block;
            background: var(--light-bg);
            padding: 10px 25px;
            margin: 5px 10px;
            border-radius: 50px;
            color: var(--dark-text);
            text-decoration: none;
            transition: var(--transition);
            border: 1px solid #dee2e6;
        }
        .flink:hover {
            background: var(--accent-color);
            color: white;
            transform: translateY(-3px);
            border-color: var(--accent-color);
        }
        .footer {
            background: #1c1c1c;
            color: #aaa;
            padding-top: 60px;
        }
        .footer a {
            color: #ddd;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer a:hover {
            color: var(--accent-color);
        }
        .copyright {
            background: #111;
            padding: 20px 0;
            margin-top: 40px;
            font-size: 0.9rem;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--accent-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            text-decoration: none;
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: var(--primary-color);
            color: white;
        }
        @media (max-width: 768px) {
            .hero-section h1 {
                font-size: 2.5rem;
            }
            .hero-section {
                padding: 80px 0;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }