:root {
            --primary-color: #1e3a8a;
            --secondary-color: #dc2626;
            --accent-color: #fbbf24;
            --light-bg: #f8fafc;
            --dark-text: #1e293b;
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', system-ui, sans-serif;
            color: var(--dark-text);
            line-height: 1.7;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            color: var(--primary-color);
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        .hero-section {
            background: linear-gradient(rgba(30, 58, 138, 0.85), rgba(30, 58, 138, 0.9)), url('https://images.unsplash.com/photo-1551958219-acbc608c6377?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover no-repeat;
            color: white;
            padding: 120px 0 80px;
            position: relative;
        }
        .hero-title {
            font-size: 3.5rem;
            text-shadow: 2px 2px 8px rgba(0,0,0,0.3);
        }
        @media (max-width: 768px) {
            .hero-title { font-size: 2.5rem; }
        }
        .section-padding {
            padding: 80px 0;
        }
        .bg-light-custom {
            background-color: var(--light-bg);
        }
        .icon-box {
            width: 70px;
            height: 70px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            margin-bottom: 20px;
            transition: var(--transition);
        }
        .service-card, .news-card, .team-card {
            border: none;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
            transition: var(--transition);
            height: 100%;
        }
        .service-card:hover, .news-card:hover, .team-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 40px rgba(0,0,0,0.15);
        }
        .service-card .icon-box {
            background: linear-gradient(135deg, var(--primary-color), #3b82f6);
            color: white;
        }
        .stats-number {
            font-size: 3.5rem;
            font-weight: 800;
            color: var(--primary-color);
            line-height: 1;
        }
        .news-date {
            color: var(--secondary-color);
            font-weight: 600;
        }
        .team-img {
            height: 280px;
            object-fit: cover;
            object-position: top;
        }
        .form-control, .form-select {
            padding: 12px 15px;
            border-radius: 8px;
            border: 1px solid #cbd5e1;
        }
        .form-control:focus, .form-select:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 0.25rem rgba(30, 58, 138, 0.25);
        }
        .btn-primary-custom {
            background: linear-gradient(to right, var(--primary-color), #3b82f6);
            border: none;
            padding: 12px 30px;
            border-radius: 8px;
            color: white;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-primary-custom:hover {
            background: linear-gradient(to right, #1e40af, var(--primary-color));
            color: white;
            transform: translateY(-2px);
        }
        .footer {
            background-color: #0f172a;
            color: #cbd5e1;
            padding-top: 60px;
        }
        .footer a {
            color: #cbd5e1;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer a:hover {
            color: white;
            padding-left: 5px;
        }
        .copyright {
            background-color: #020617;
            padding: 20px 0;
            font-size: 0.9rem;
        }
        .flink {
            display: inline-block;
            padding: 8px 20px;
            margin: 5px 10px 5px 0;
            background-color: #e2e8f0;
            border-radius: 50px;
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
            border: 1px solid transparent;
        }
        .flink:hover {
            background-color: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
            transform: translateY(-3px);
        }
        .friendlink {
            background-color: #f1f5f9;
        }
        .navbar-nav .nav-link {
            font-weight: 600;
            padding: 8px 15px;
            border-radius: 6px;
            transition: var(--transition);
        }
        .navbar-nav .nav-link:hover {
            background-color: rgba(30, 58, 138, 0.1);
        }
        .accordion-button:not(.collapsed) {
            background-color: rgba(30, 58, 138, 0.1);
            color: var(--primary-color);
            font-weight: 600;
        }
        .accordion-button:focus {
            box-shadow: 0 0 0 0.25rem rgba(30, 58, 138, 0.25);
        }
        .timeline {
            position: relative;
            padding-left: 30px;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 4px;
            background-color: var(--primary-color);
            border-radius: 4px;
        }
        .timeline-item {
            position: relative;
            margin-bottom: 30px;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -36px;
            top: 5px;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background-color: var(--secondary-color);
            border: 3px solid white;
            box-shadow: 0 0 0 3px var(--secondary-color);
        }
        .contact-icon {
            width: 50px;
            height: 50px;
            border-radius: 10px;
            background-color: rgba(30, 58, 138, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-color);
            font-size: 1.3rem;
            margin-right: 15px;
        }
        .badge-custom {
            background: linear-gradient(to right, var(--secondary-color), #f97316);
            color: white;
            font-weight: 600;
            padding: 5px 12px;
            border-radius: 20px;
        }
        .map-container {
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: var(--primary-color);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            text-decoration: none;
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background-color: var(--secondary-color);
            color: white;
            transform: translateY(-5px);
        }