:root {
            --primary-color: #1e3a8a;
            --secondary-color: #dc2626;
            --accent-color: #f59e0b;
            --dark-color: #0f172a;
            --light-color: #f8fafc;
            --text-color: #334155;
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: var(--text-color);
            line-height: 1.8;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5 {
            color: var(--dark-color);
            font-weight: 700;
        }
        .navbar {
            background: rgba(255, 255, 255, 0.95);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            padding: 1rem 0;
            transition: var(--transition);
        }
        .navbar-brand {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-color) !important;
        }
        .nav-link {
            color: var(--dark-color) !important;
            font-weight: 600;
            margin: 0 0.5rem;
            transition: var(--transition);
            position: relative;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--secondary-color) !important;
        }
        .nav-link:hover::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--secondary-color);
            border-radius: 2px;
        }
        .hero-section {
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--dark-color) 100%);
            color: white;
            padding: 8rem 0 6rem;
            position: relative;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHZpZXdCb3g9IjAgMCAzMCAzMCI+PHBhdGggZmlsbD0ibm9uZSIgc3Ryb2tlPSJyZ2JhKDI1NSwyNTUsMjU1LDAuMDUpIiBzdHJva2Utd2lkdGg9IjEuNSIgZD0iTTAgMTVoMzBNMTUgMGwtMTUgMTUgMTUgMTV6Ii8+PC9zdmc+') repeat;
            opacity: 0.3;
        }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }
        }
        .hero-subtitle {
            font-size: 1.2rem;
            opacity: 0.9;
            margin-bottom: 2.5rem;
            max-width: 700px;
        }
        .btn-primary-custom {
            background: var(--secondary-color);
            border: none;
            color: white;
            padding: 0.8rem 2.5rem;
            border-radius: 50px;
            font-weight: 600;
            transition: var(--transition);
            box-shadow: 0 4px 15px rgba(220, 38, 38, 0.3);
        }
        .btn-primary-custom:hover {
            background: #b91c1c;
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(220, 38, 38, 0.4);
        }
        .section-title {
            position: relative;
            padding-bottom: 1rem;
            margin-bottom: 3rem;
            text-align: center;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--secondary-color);
            border-radius: 2px;
        }
        .feature-card {
            background: white;
            border-radius: 15px;
            padding: 2.5rem 2rem;
            height: 100%;
            transition: var(--transition);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            border: 1px solid #e2e8f0;
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
            border-color: var(--accent-color);
        }
        .feature-icon {
            font-size: 3rem;
            color: var(--primary-color);
            margin-bottom: 1.5rem;
        }
        .service-item {
            background: white;
            border-radius: 12px;
            padding: 2rem;
            margin-bottom: 2rem;
            transition: var(--transition);
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
            border-left: 5px solid var(--primary-color);
        }
        .service-item:hover {
            transform: translateX(10px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        }
        .stats-section {
            background: linear-gradient(135deg, var(--dark-color) 0%, var(--primary-color) 100%);
            color: white;
            padding: 5rem 0;
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 800;
            color: var(--accent-color);
            margin-bottom: 0.5rem;
        }
        .article-card {
            background: white;
            border-radius: 12px;
            overflow: hidden;
            transition: var(--transition);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.06);
            height: 100%;
            border: 1px solid #e2e8f0;
        }
        .article-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
        }
        .article-img {
            height: 220px;
            object-fit: cover;
            width: 100%;
        }
        .article-content {
            padding: 1.8rem;
        }
        .team-card {
            text-align: center;
            padding: 2rem;
            border-radius: 12px;
            transition: var(--transition);
            background: white;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.06);
            height: 100%;
        }
        .team-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
        }
        .team-img {
            width: 150px;
            height: 150px;
            object-fit: cover;
            border-radius: 50%;
            margin: 0 auto 1.5rem;
            border: 5px solid #f1f5f9;
        }
        .flink {
            display: inline-block;
            background: #f8fafc;
            color: var(--primary-color);
            padding: 0.6rem 1.5rem;
            border-radius: 30px;
            margin: 0.5rem;
            text-decoration: none;
            font-weight: 600;
            transition: var(--transition);
            border: 2px solid #e2e8f0;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
            transform: translateY(-3px);
        }
        .contact-info {
            background: #f8fafc;
            border-radius: 12px;
            padding: 2.5rem;
            height: 100%;
        }
        .contact-icon {
            font-size: 2rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        footer {
            background: var(--dark-color);
            color: #cbd5e1;
            padding: 4rem 0 2rem;
        }
        .footer-links a {
            color: #cbd5e1;
            text-decoration: none;
            transition: var(--transition);
            display: block;
            margin-bottom: 0.8rem;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        .social-icons a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.1);
            color: white;
            border-radius: 50%;
            margin-right: 0.8rem;
            transition: var(--transition);
        }
        .social-icons a:hover {
            background: var(--secondary-color);
            transform: translateY(-3px);
        }
        .copyright {
            border-top: 1px solid #334155;
            padding-top: 2rem;
            margin-top: 3rem;
            font-size: 0.9rem;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: 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: var(--transition);
            box-shadow: 0 4px 15px rgba(220, 38, 38, 0.3);
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: #b91c1c;
            transform: translateY(-5px);
        }
        .form-control-custom {
            border: 2px solid #e2e8f0;
            border-radius: 8px;
            padding: 0.9rem 1.2rem;
            transition: var(--transition);
        }
        .form-control-custom:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 0.25rem rgba(30, 58, 138, 0.1);
        }
        .highlight {
            color: var(--secondary-color);
            font-weight: 700;
        }
        .text-justify {
            text-align: justify;
        }
        .img-fluid-rounded {
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        }
        .timeline {
            position: relative;
            padding-left: 2rem;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 7px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: var(--primary-color);
        }
        .timeline-item {
            position: relative;
            margin-bottom: 2rem;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -2rem;
            top: 5px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--secondary-color);
            border: 3px solid white;
            box-shadow: 0 0 0 3px var(--primary-color);
        }