:root {
            --primary-color: #1a365d;
            --secondary-color: #e63946;
            --accent-color: #f4a261;
            --light-color: #f8f9fa;
            --dark-color: #212529;
            --gray-color: #6c757d;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: var(--dark-color);
            overflow-x: hidden;
            line-height: 1.7;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            color: var(--primary-color);
        }
        .navbar {
            background-color: rgba(26, 54, 93, 0.95);
            backdrop-filter: blur(10px);
            padding: 1rem 0;
            transition: all 0.3s ease;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }
        .navbar-brand {
            font-size: 1.8rem;
            font-weight: 800;
            color: white !important;
        }
        .navbar-brand i {
            color: var(--accent-color);
            margin-right: 8px;
        }
        .nav-link {
            color: rgba(255, 255, 255, 0.9) !important;
            font-weight: 500;
            margin: 0 8px;
            transition: all 0.3s;
            position: relative;
        }
        .nav-link:hover, .nav-link.active {
            color: white !important;
            transform: translateY(-2px);
        }
        .nav-link:hover::after, .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 10%;
            width: 80%;
            height: 3px;
            background-color: var(--accent-color);
            border-radius: 2px;
        }
        .hero-section {
            background: linear-gradient(rgba(26, 54, 93, 0.85), rgba(26, 54, 93, 0.9)), url('https://images.unsplash.com/photo-1549399542-7e3f8b79c341?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=1470&q=80') center/cover no-repeat;
            color: white;
            padding: 120px 0 100px;
            position: relative;
        }
        .hero-section h1 {
            color: white;
            font-size: 3.5rem;
            margin-bottom: 1.5rem;
            text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.3);
        }
        .hero-section p {
            font-size: 1.2rem;
            margin-bottom: 2rem;
            opacity: 0.9;
        }
        .btn-primary {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
            padding: 12px 30px;
            font-weight: 600;
            border-radius: 8px;
            transition: all 0.3s;
        }
        .btn-primary:hover {
            background-color: #c1121f;
            border-color: #c1121f;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(230, 57, 70, 0.3);
        }
        .btn-outline-light {
            border-radius: 8px;
            padding: 12px 30px;
            font-weight: 600;
            transition: all 0.3s;
        }
        .btn-outline-light:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(255, 255, 255, 0.2);
        }
        .section-title {
            position: relative;
            margin-bottom: 3rem;
            text-align: center;
        }
        .section-title h2 {
            display: inline-block;
            padding-bottom: 15px;
        }
        .section-title h2::after {
            content: '';
            position: absolute;
            width: 80px;
            height: 4px;
            background-color: var(--accent-color);
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            border-radius: 2px;
        }
        .service-card {
            background: white;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            transition: all 0.4s ease;
            height: 100%;
            border: none;
            margin-bottom: 30px;
        }
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
        }
        .service-card .card-icon {
            background-color: rgba(26, 54, 93, 0.05);
            width: 80px;
            height: 80px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 30px auto 20px;
            transition: all 0.3s;
        }
        .service-card:hover .card-icon {
            background-color: var(--primary-color);
            transform: scale(1.1);
        }
        .service-card .card-icon i {
            font-size: 2.2rem;
            color: var(--primary-color);
            transition: all 0.3s;
        }
        .service-card:hover .card-icon i {
            color: white;
        }
        .about-img {
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
            transition: all 0.4s;
        }
        .about-img:hover {
            transform: scale(1.02);
        }
        .feature-box {
            padding: 25px;
            background-color: rgba(26, 54, 93, 0.03);
            border-radius: 10px;
            border-left: 4px solid var(--accent-color);
            margin-bottom: 20px;
            transition: all 0.3s;
        }
        .feature-box:hover {
            background-color: rgba(26, 54, 93, 0.08);
            transform: translateX(5px);
        }
        .feature-box i {
            color: var(--secondary-color);
            font-size: 1.8rem;
            margin-bottom: 15px;
        }
        .stats-counter {
            background: linear-gradient(rgba(26, 54, 93, 0.9), rgba(26, 54, 93, 0.95)), url('https://images.unsplash.com/photo-1542744095-fcf48d80b0fd?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=1476&q=80') center/cover fixed;
            color: white;
            padding: 80px 0;
        }
        .counter-item {
            text-align: center;
        }
        .counter {
            font-size: 3.5rem;
            font-weight: 800;
            color: var(--accent-color);
            margin-bottom: 10px;
            display: block;
        }
        .counter-item p {
            font-size: 1.1rem;
            opacity: 0.9;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .team-card {
            background: white;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
            transition: all 0.3s;
            margin-bottom: 30px;
        }
        .team-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
        }
        .team-img {
            height: 280px;
            overflow: hidden;
        }
        .team-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: all 0.5s;
        }
        .team-card:hover .team-img img {
            transform: scale(1.05);
        }
        .team-info {
            padding: 25px;
        }
        .team-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background-color: rgba(26, 54, 93, 0.1);
            border-radius: 50%;
            margin-right: 8px;
            color: var(--primary-color);
            transition: all 0.3s;
        }
        .team-social a:hover {
            background-color: var(--primary-color);
            color: white;
            transform: translateY(-3px);
        }
        .contact-info-box {
            background-color: white;
            padding: 30px;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            height: 100%;
            transition: all 0.3s;
            border-top: 5px solid var(--primary-color);
        }
        .contact-info-box:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.12);
        }
        .contact-info-box i {
            font-size: 2.5rem;
            color: var(--secondary-color);
            margin-bottom: 20px;
        }
        .form-control, .form-select {
            padding: 12px 15px;
            border-radius: 8px;
            border: 1px solid #ced4da;
            transition: all 0.3s;
        }
        .form-control:focus, .form-select:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 0.25rem rgba(26, 54, 93, 0.25);
        }
        footer {
            background-color: var(--primary-color);
            color: white;
            padding-top: 80px;
        }
        .footer-links h5 {
            color: var(--accent-color);
            margin-bottom: 25px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-links h5::after {
            content: '';
            position: absolute;
            width: 50px;
            height: 3px;
            background-color: rgba(244, 162, 97, 0.5);
            bottom: 0;
            left: 0;
        }
        .footer-links ul {
            list-style: none;
            padding-left: 0;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
            transition: all 0.3s;
        }
        .footer-links a:hover {
            color: var(--accent-color);
            padding-left: 5px;
        }
        .copyright {
            background-color: rgba(0, 0, 0, 0.2);
            padding: 25px 0;
            margin-top: 60px;
            text-align: center;
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.95rem;
        }
        .friendlink {
            background-color: #f8f9fa;
            padding: 60px 0;
        }
        .flink {
            display: inline-block;
            background-color: white;
            padding: 12px 25px;
            margin: 8px;
            border-radius: 8px;
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            border: 1px solid #e9ecef;
        }
        .flink:hover {
            background-color: var(--primary-color);
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(26, 54, 93, 0.2);
            text-decoration: none;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background-color: var(--secondary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s;
            box-shadow: 0 5px 15px rgba(230, 57, 70, 0.3);
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background-color: #c1121f;
            color: white;
            transform: translateY(-5px);
        }
        @media (max-width: 768px) {
            .hero-section h1 {
                font-size: 2.5rem;
            }
            .hero-section {
                padding: 100px 0 80px;
            }
            .counter {
                font-size: 2.8rem;
            }
            .navbar-brand {
                font-size: 1.5rem;
            }
        }
        .news-card {
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
            transition: all 0.3s;
            height: 100%;
            background: white;
            margin-bottom: 30px;
        }
        .news-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.12);
        }
        .news-img {
            height: 220px;
            overflow: hidden;
        }
        .news-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: all 0.5s;
        }
        .news-card:hover .news-img img {
            transform: scale(1.05);
        }
        .news-content {
            padding: 25px;
        }
        .news-date {
            color: var(--gray-color);
            font-size: 0.9rem;
            margin-bottom: 10px;
        }
        .news-date i {
            color: var(--secondary-color);
            margin-right: 5px;
        }