:root {
            --primary-color: #1a237e;
            --secondary-color: #ff6f00;
            --accent-color: #00acc1;
            --light-bg: #f8f9fa;
            --dark-text: #212529;
            --shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        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);
        }
        .navbar {
            background-color: rgba(26, 35, 126, 0.95);
            backdrop-filter: blur(10px);
            padding: 1rem 0;
            transition: var(--transition);
            box-shadow: var(--shadow);
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            color: white !important;
        }
        .navbar-brand i {
            color: var(--secondary-color);
            margin-right: 10px;
        }
        .nav-link {
            color: rgba(255, 255, 255, 0.9) !important;
            font-weight: 600;
            margin: 0 8px;
            padding: 8px 16px !important;
            border-radius: 4px;
            transition: var(--transition);
        }
        .nav-link:hover, .nav-link.active {
            background-color: rgba(255, 111, 0, 0.15);
            color: var(--secondary-color) !important;
            transform: translateY(-2px);
        }
        .hero {
            background: linear-gradient(rgba(26, 35, 126, 0.85), rgba(0, 172, 193, 0.8)), url('https://images.unsplash.com/photo-1556056504-5c7696c4c28d?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 160px 0 100px;
            position: relative;
            overflow: hidden;
        }
        .hero h1 {
            color: white;
            font-size: 3.5rem;
            margin-bottom: 1.5rem;
            text-shadow: 0 2px 10px rgba(0,0,0,0.3);
        }
        .hero p {
            font-size: 1.3rem;
            max-width: 700px;
            margin: 0 auto 2rem;
            opacity: 0.95;
        }
        .btn-primary {
            background-color: var(--secondary-color);
            border: none;
            padding: 12px 30px;
            font-weight: 600;
            border-radius: 30px;
            transition: var(--transition);
        }
        .btn-primary:hover {
            background-color: #e65100;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(255, 111, 0, 0.3);
        }
        .section-title {
            position: relative;
            margin-bottom: 3rem;
            text-align: center;
        }
        .section-title:after {
            content: '';
            position: absolute;
            width: 80px;
            height: 4px;
            background: var(--secondary-color);
            bottom: -15px;
            left: 50%;
            transform: translateX(-50%);
            border-radius: 2px;
        }
        .card {
            border: none;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            height: 100%;
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }
        .card-icon {
            font-size: 3rem;
            color: var(--accent-color);
            margin-bottom: 1.5rem;
        }
        .service-card {
            border-top: 4px solid var(--accent-color);
        }
        .data-highlight {
            background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
            color: white;
            padding: 60px 0;
            border-radius: 20px;
            margin: 5rem 0;
            box-shadow: var(--shadow);
        }
        .counter {
            font-size: 3.5rem;
            font-weight: 800;
            color: var(--secondary-color);
        }
        .team-member {
            text-align: center;
            margin-bottom: 2rem;
        }
        .team-img {
            width: 180px;
            height: 180px;
            border-radius: 50%;
            object-fit: cover;
            border: 5px solid var(--light-bg);
            margin: 0 auto 1.5rem;
            box-shadow: var(--shadow);
        }
        .news-card {
            border-left: 5px solid var(--secondary-color);
        }
        .news-date {
            color: var(--accent-color);
            font-weight: 600;
        }
        .contact-info {
            list-style: none;
            padding-left: 0;
        }
        .contact-info li {
            margin-bottom: 1.5rem;
            padding-left: 40px;
            position: relative;
        }
        .contact-info i {
            position: absolute;
            left: 0;
            top: 5px;
            color: var(--secondary-color);
            font-size: 1.5rem;
        }
        .friendlink {
            background-color: var(--light-bg);
            padding: 80px 0;
        }
        .flink {
            display: inline-block;
            background: white;
            padding: 12px 25px;
            margin: 8px;
            border-radius: 8px;
            color: var(--primary-color);
            font-weight: 600;
            box-shadow: var(--shadow);
            transition: var(--transition);
            text-decoration: none;
        }
        .flink:hover {
            background-color: var(--primary-color);
            color: white;
            transform: translateY(-5px);
        }
        footer {
            background-color: var(--primary-color);
            color: rgba(255, 255, 255, 0.85);
            padding: 70px 0 30px;
        }
        footer a {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
            transition: var(--transition);
        }
        footer a:hover {
            color: var(--secondary-color);
            text-decoration: underline;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            margin-top: 40px;
            font-size: 0.9rem;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background-color: var(--secondary-color);
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            box-shadow: var(--shadow);
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background-color: #e65100;
            transform: translateY(-5px);
        }
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.5rem;
            }
            .hero p {
                font-size: 1.1rem;
            }
            .counter {
                font-size: 2.5rem;
            }
            .navbar-brand {
                font-size: 1.5rem;
            }
        }