:root {
            --primary-color: #1a365d;
            --secondary-color: #e63946;
            --accent-color: #2a9d8f;
            --light-color: #f8f9fa;
            --dark-color: #212529;
            --gray-color: #6c757d;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            line-height: 1.6;
            color: var(--dark-color);
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .nav-link {
            font-weight: 500;
            transition: color 0.3s;
        }
        .nav-link:hover {
            color: var(--secondary-color) !important;
        }
        .hero-section {
            background: linear-gradient(135deg, var(--primary-color) 0%, #2c5282 100%);
            color: white;
            padding: 100px 0;
            position: relative;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%23ffffff" fill-opacity="0.1" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,122.7C672,117,768,139,864,154.7C960,171,1056,181,1152,165.3C1248,149,1344,107,1392,85.3L1440,64L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>');
            background-size: cover;
            background-position: center;
        }
        .hero-content {
            position: relative;
            z-index: 1;
        }
        .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-color: var(--secondary-color);
            border-radius: 2px;
        }
        .card-hover {
            transition: transform 0.3s, box-shadow 0.3s;
            border: none;
            border-radius: 10px;
            overflow: hidden;
        }
        .card-hover:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1) !important;
        }
        .service-icon {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            color: white;
            font-size: 2rem;
        }
        .feature-box {
            padding: 30px;
            border-radius: 10px;
            background-color: white;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            height: 100%;
            transition: all 0.3s;
        }
        .feature-box:hover {
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        }
        .flink {
            display: inline-block;
            padding: 8px 20px;
            margin: 5px 10px;
            background-color: #f8f9fa;
            border-radius: 5px;
            text-decoration: none;
            color: var(--dark-color);
            font-weight: 500;
            transition: all 0.3s;
            border: 1px solid #dee2e6;
        }
        .flink:hover {
            background-color: var(--primary-color);
            color: white;
            transform: translateY(-3px);
        }
        .footer {
            background-color: var(--primary-color);
            color: white;
            padding: 60px 0 20px;
        }
        .footer a {
            color: #ddd;
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer a:hover {
            color: white;
        }
        .copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            margin-top: 40px;
            font-size: 0.9rem;
            color: #aaa;
        }
        .contact-info li {
            margin-bottom: 10px;
        }
        .contact-info i {
            width: 30px;
            color: var(--accent-color);
        }
        .stats-number {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 5px;
        }
        .stats-label {
            font-size: 1rem;
            color: var(--gray-color);
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .btn-custom {
            background: linear-gradient(to right, var(--primary-color), var(--accent-color));
            color: white;
            border: none;
            padding: 12px 30px;
            border-radius: 5px;
            font-weight: 600;
            transition: all 0.3s;
        }
        .btn-custom:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
            color: white;
        }
        .news-card {
            border-left: 4px solid var(--accent-color);
        }
        .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;
            transition: all 0.3s;
            z-index: 1000;
        }
        .back-to-top.visible {
            opacity: 1;
        }
        .back-to-top:hover {
            background-color: var(--secondary-color);
            color: white;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 60px 0;
            }
            .section-title {
                margin-bottom: 30px;
            }
            .footer {
                padding: 40px 0 20px;
            }
        }