:root {
            --primary-color: #1a6dcc;
            --secondary-color: #f8f9fa;
            --accent-color: #ffc107;
            --dark-color: #343a40;
            --light-color: #ffffff;
            --success-color: #28a745;
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            line-height: 1.6;
            color: #333;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            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: 15px 0;
            transition: var(--transition);
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .nav-link {
            font-weight: 600;
            padding: 8px 15px !important;
            margin: 0 5px;
            border-radius: 4px;
            transition: var(--transition);
        }
        .nav-link:hover, .nav-link.active {
            background-color: var(--primary-color);
            color: white !important;
        }
        .hero-section {
            background: linear-gradient(135deg, var(--primary-color) 0%, #0d4d9c 100%);
            color: white;
            padding: 100px 0;
            position: relative;
            overflow: hidden;
        }
        .hero-section h1 {
            color: white;
            font-size: 3.5rem;
            margin-bottom: 20px;
        }
        .hero-section p {
            font-size: 1.2rem;
            opacity: 0.9;
            margin-bottom: 30px;
        }
        .btn-primary {
            background-color: var(--accent-color);
            border-color: var(--accent-color);
            color: var(--dark-color);
            font-weight: 600;
            padding: 12px 30px;
            border-radius: 30px;
            transition: var(--transition);
        }
        .btn-primary:hover {
            background-color: #e0a800;
            border-color: #e0a800;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 50px;
            text-align: center;
        }
        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background-color: var(--primary-color);
        }
        .feature-box {
            background: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.05);
            height: 100%;
            transition: var(--transition);
            border-top: 4px solid transparent;
        }
        .feature-box:hover {
            transform: translateY(-10px);
            border-top-color: var(--primary-color);
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }
        .icon-box {
            width: 70px;
            height: 70px;
            background-color: rgba(26, 109, 204, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
        }
        .icon-box i {
            font-size: 1.8rem;
            color: var(--primary-color);
        }
        .stats-box {
            text-align: center;
            padding: 30px;
            background-color: white;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .stats-number {
            font-size: 3rem;
            font-weight: 800;
            color: var(--primary-color);
            line-height: 1;
        }
        .service-card {
            background: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: var(--transition);
            height: 100%;
        }
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }
        .service-img {
            height: 200px;
            object-fit: cover;
            width: 100%;
        }
        .service-body {
            padding: 25px;
        }
        .team-member {
            text-align: center;
            margin-bottom: 30px;
        }
        .team-img {
            width: 150px;
            height: 150px;
            object-fit: cover;
            border-radius: 50%;
            margin-bottom: 20px;
            border: 5px solid var(--secondary-color);
        }
        .news-card {
            background: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            height: 100%;
            transition: var(--transition);
        }
        .news-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        }
        .news-date {
            background-color: var(--primary-color);
            color: white;
            padding: 10px 15px;
            display: inline-block;
            border-radius: 0 0 5px 5px;
            font-weight: 600;
        }
        .news-body {
            padding: 20px;
        }
        .contact-info-box {
            background-color: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            height: 100%;
            text-align: center;
        }
        .contact-icon {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 20px;
        }
        form .form-control {
            padding: 12px 15px;
            border-radius: 5px;
            border: 1px solid #ddd;
            margin-bottom: 20px;
        }
        form .form-control:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 0.25rem rgba(26, 109, 204, 0.25);
        }
        footer {
            background-color: var(--dark-color);
            color: rgba(255,255,255,0.8);
            padding: 70px 0 20px;
        }
        footer h5 {
            color: white;
            margin-bottom: 25px;
            position: relative;
            padding-bottom: 10px;
        }
        footer h5:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 3px;
            background-color: var(--accent-color);
        }
        footer a {
            color: rgba(255,255,255,0.8);
            text-decoration: none;
            transition: var(--transition);
        }
        footer a:hover {
            color: var(--accent-color);
            padding-left: 5px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 20px;
            margin-top: 50px;
            text-align: center;
        }
        .social-links a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background-color: rgba(255,255,255,0.1);
            border-radius: 50%;
            margin-right: 10px;
            transition: var(--transition);
        }
        .social-links a:hover {
            background-color: var(--primary-color);
            transform: translateY(-3px);
        }
        .friendlink {
            background-color: var(--secondary-color);
            padding: 60px 0;
        }
        .flink {
            display: inline-block;
            background-color: white;
            padding: 12px 25px;
            margin: 8px;
            border-radius: 30px;
            text-decoration: none;
            color: var(--dark-color);
            font-weight: 600;
            box-shadow: 0 3px 10px rgba(0,0,0,0.05);
            transition: var(--transition);
            border: 1px solid #eee;
        }
        .flink:hover {
            background-color: var(--primary-color);
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .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;
            text-decoration: none;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            z-index: 1000;
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background-color: #0d4d9c;
            color: white;
        }
        @media (max-width: 768px) {
            .hero-section h1 {
                font-size: 2.5rem;
            }
            .hero-section {
                padding: 70px 0;
            }
            .section-title {
                margin-bottom: 30px;
            }
        }