:root {
            --primary-color: #1a3a8f;
            --secondary-color: #dc3545;
            --accent-color: #ffc107;
            --light-bg: #f8f9fa;
            --dark-text: #212529;
            --gray-border: #dee2e6;
        }
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif;
            color: var(--dark-text);
            line-height: 1.6;
            overflow-x: hidden;
        }
        .navbar {
            background: rgba(255, 255, 255, 0.98);
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
            padding: 0.8rem 0;
            transition: all 0.3s ease;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .navbar-brand span {
            color: var(--secondary-color);
        }
        .nav-link {
            font-weight: 500;
            color: var(--dark-text) !important;
            margin: 0 0.5rem;
            padding: 0.5rem 1rem !important;
            border-radius: 4px;
            transition: all 0.3s ease;
        }
        .nav-link:hover, .nav-link.active {
            background-color: rgba(26, 58, 143, 0.1);
            color: var(--primary-color) !important;
        }
        .hero-section {
            background: linear-gradient(135deg, var(--primary-color) 0%, #2c4cb0 100%);
            color: white;
            padding: 6rem 0 5rem;
            position: relative;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 600" opacity="0.05"><path d="M0,300L48,320C96,340,192,380,288,390C384,400,480,380,576,350C672,320,768,280,864,250C960,220,1056,200,1152,200C1248,200,1344,220,1392,230L1440,240L1440,600L1392,600C1344,600,1248,600,1152,600C1056,600,960,600,864,600C768,600,672,600,576,600C480,600,384,600,288,600C192,600,96,600,48,600L0,600Z" fill="white"/></svg>') no-repeat bottom center;
            background-size: cover;
        }
        .hero-title {
            font-size: 3.2rem;
            font-weight: 700;
            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;
            max-width: 700px;
        }
        .section-title {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 1.5rem;
            position: relative;
            padding-bottom: 1rem;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 80px;
            height: 4px;
            background: var(--secondary-color);
            border-radius: 2px;
        }
        .section-title.center::after {
            left: 50%;
            transform: translateX(-50%);
        }
        .feature-card {
            background: white;
            border-radius: 12px;
            padding: 2.5rem 2rem;
            height: 100%;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
            border: 1px solid var(--gray-border);
        }
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        .feature-icon {
            width: 70px;
            height: 70px;
            background: linear-gradient(135deg, var(--primary-color), #2c4cb0);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
            color: white;
            font-size: 1.8rem;
        }
        .feature-card h3 {
            font-size: 1.5rem;
            font-weight: 600;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        .stat-card {
            background: white;
            border-radius: 10px;
            padding: 2rem;
            text-align: center;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            border: 1px solid var(--gray-border);
        }
        .stat-number {
            font-size: 2.8rem;
            font-weight: 700;
            color: var(--primary-color);
            line-height: 1;
        }
        .stat-label {
            font-size: 1.1rem;
            color: #666;
            margin-top: 0.5rem;
        }
        .service-card {
            background: white;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
            transition: all 0.3s ease;
            height: 100%;
        }
        .service-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.12);
        }
        .service-img {
            height: 200px;
            background-color: #e9ecef;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-color);
            font-size: 3rem;
        }
        .service-content {
            padding: 2rem;
        }
        .service-content h3 {
            font-size: 1.4rem;
            font-weight: 600;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        .team-card {
            background: white;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
        }
        .team-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        }
        .team-img {
            height: 250px;
            background-color: #e9ecef;
        }
        .team-info {
            padding: 1.5rem;
        }
        .team-info h4 {
            font-size: 1.3rem;
            font-weight: 600;
            color: var(--primary-color);
            margin-bottom: 0.3rem;
        }
        .team-info p {
            color: #666;
            font-size: 0.95rem;
        }
        .contact-info {
            background: white;
            border-radius: 12px;
            padding: 2.5rem;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
            height: 100%;
        }
        .contact-icon {
            width: 60px;
            height: 60px;
            background: rgba(26, 58, 143, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-color);
            font-size: 1.5rem;
            margin-bottom: 1.5rem;
        }
        .friendlink {
            background-color: var(--light-bg);
            padding: 4rem 0;
        }
        .flink {
            display: inline-block;
            background: white;
            padding: 0.8rem 1.8rem;
            border-radius: 50px;
            margin: 0.5rem 0.8rem;
            color: var(--dark-text);
            text-decoration: none;
            font-weight: 500;
            border: 1px solid var(--gray-border);
            transition: all 0.3s ease;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(26, 58, 143, 0.2);
        }
        footer {
            background: #1a1f36;
            color: #b0b7c3;
            padding-top: 3.5rem;
        }
        .footer-title {
            color: white;
            font-size: 1.3rem;
            font-weight: 600;
            margin-bottom: 1.5rem;
        }
        .footer-links a {
            color: #b0b7c3;
            text-decoration: none;
            display: block;
            margin-bottom: 0.7rem;
            transition: all 0.3s ease;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        .copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            margin-top: 3rem;
            padding: 1.5rem 0;
            text-align: center;
        }
        .btn-primary {
            background: linear-gradient(to right, var(--primary-color), #2c4cb0);
            border: none;
            padding: 0.8rem 2rem;
            font-weight: 500;
            border-radius: 6px;
            transition: all 0.3s ease;
        }
        .btn-primary:hover {
            background: linear-gradient(to right, #152b75, var(--primary-color));
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(26, 58, 143, 0.3);
        }
        .btn-secondary {
            background: var(--secondary-color);
            border: none;
            padding: 0.8rem 2rem;
            font-weight: 500;
            border-radius: 6px;
            transition: all 0.3s ease;
        }
        .btn-secondary:hover {
            background: #c82333;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(220, 53, 69, 0.3);
        }
        .news-card {
            background: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
            height: 100%;
        }
        .news-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        }
        .news-date {
            background: var(--primary-color);
            color: white;
            padding: 0.5rem 1rem;
            display: inline-block;
            border-radius: 4px;
            font-weight: 500;
            margin-bottom: 1rem;
        }
        .news-content {
            padding: 1.5rem;
        }
        .news-content h3 {
            font-size: 1.3rem;
            font-weight: 600;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        .form-control {
            padding: 0.8rem 1rem;
            border: 1px solid var(--gray-border);
            border-radius: 6px;
            margin-bottom: 1.5rem;
        }
        .form-control:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 0.25rem rgba(26, 58, 143, 0.25);
        }
        @media (max-width: 992px) {
            .hero-title {
                font-size: 2.5rem;
            }
            .section-title {
                font-size: 2rem;
            }
            .feature-card, .service-card, .contact-info {
                margin-bottom: 1.5rem;
            }
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2rem;
            }
            .hero-subtitle {
                font-size: 1.1rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .stat-number {
                font-size: 2.2rem;
            }
            .navbar-collapse {
                background: white;
                padding: 1rem;
                border-radius: 10px;
                box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
                margin-top: 1rem;
            }
        }
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .fade-in {
            animation: fadeInUp 0.8s ease forwards;
        }
        .sticky-nav {
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(10px);
            padding: 0.5rem 0;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            cursor: pointer;
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
            box-shadow: 0 3px 15px rgba(26, 58, 143, 0.3);
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: #152b75;
            transform: translateY(-5px);
        }