:root {
            --primary-color: #003366;
            --secondary-color: #28a745;
            --accent-color: #ffc107;
            --light-color: #f8f9fa;
            --dark-color: #343a40;
            --text-color: #333;
            --border-radius: 8px;
            --transition-speed: 0.3s;
            --box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        body {
            font-family: 'Helvetica Neue', 'Microsoft YaHei', Arial, sans-serif;
            color: var(--text-color);
            line-height: 1.8;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 1.2rem;
        }
        .hero-section {
            background: linear-gradient(rgba(0, 51, 102, 0.85), rgba(0, 51, 102, 0.9)), url('https://images.unsplash.com/photo-1497366754035-f200968a6e72?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover no-repeat;
            color: white;
            padding: 180px 0 120px;
            text-align: center;
        }
        .hero-section h1 {
            color: white;
            font-size: 3.5rem;
            margin-bottom: 1.5rem;
            text-shadow: 2px 2px 5px rgba(0,0,0,0.5);
        }
        .hero-section .lead {
            font-size: 1.4rem;
            max-width: 800px;
            margin: 0 auto 2.5rem;
        }
        .section-padding {
            padding: 100px 0;
        }
        .section-title {
            position: relative;
            padding-bottom: 20px;
            margin-bottom: 60px;
            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;
        }
        .card-hover {
            transition: transform var(--transition-speed), box-shadow var(--transition-speed);
            border: none;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            height: 100%;
        }
        .card-hover:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        .card-icon {
            font-size: 3rem;
            color: var(--secondary-color);
            margin-bottom: 1.5rem;
        }
        .btn-primary-custom {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            color: white;
            padding: 12px 30px;
            border-radius: 50px;
            font-weight: 600;
            transition: all var(--transition-speed);
        }
        .btn-primary-custom:hover {
            background-color: #002244;
            border-color: #002244;
            color: white;
            transform: scale(1.05);
        }
        .btn-secondary-custom {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
            color: white;
            padding: 12px 30px;
            border-radius: 50px;
            font-weight: 600;
            transition: all var(--transition-speed);
        }
        .btn-secondary-custom:hover {
            background-color: #218838;
            border-color: #218838;
            color: white;
            transform: scale(1.05);
        }
        .nav-link {
            font-weight: 600;
            padding: 10px 20px !important;
            border-radius: 5px;
            transition: all var(--transition-speed);
        }
        .nav-link:hover {
            background-color: rgba(0, 51, 102, 0.1);
            color: var(--primary-color) !important;
        }
        .navbar {
            padding: 20px 0;
            transition: all var(--transition-speed);
            background-color: rgba(255, 255, 255, 0.95) !important;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
        }
        .navbar-brand {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-color) !important;
        }
        .navbar-brand span {
            color: var(--secondary-color);
        }
        .footer {
            background-color: var(--primary-color);
            color: white;
            padding: 80px 0 30px;
        }
        .footer a {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
            transition: color var(--transition-speed);
        }
        .footer a:hover {
            color: white;
            text-decoration: underline;
        }
        .footer-links h5 {
            color: white;
            border-bottom: 2px solid var(--secondary-color);
            padding-bottom: 10px;
            margin-bottom: 25px;
        }
        .copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            margin-top: 50px;
            text-align: center;
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
        }
        .social-icons a {
            display: inline-block;
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            text-align: center;
            line-height: 40px;
            margin-right: 10px;
            transition: all var(--transition-speed);
        }
        .social-icons a:hover {
            background: var(--secondary-color);
            transform: translateY(-5px);
        }
        .stats-counter {
            background: linear-gradient(rgba(0, 51, 102, 0.9), rgba(0, 51, 102, 0.9)), url('https://images.unsplash.com/photo-1552664730-d307ca884978?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover fixed;
            color: white;
            padding: 80px 0;
        }
        .stat-number {
            font-size: 3.5rem;
            font-weight: 800;
            color: var(--accent-color);
            margin-bottom: 10px;
        }
        .stat-label {
            font-size: 1.2rem;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .friendlink {
            background-color: var(--light-color);
            padding: 60px 0;
        }
        .flink {
            display: inline-block;
            padding: 10px 20px;
            margin: 5px 10px;
            background: white;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            color: var(--dark-color);
            font-weight: 600;
            transition: all var(--transition-speed);
            text-decoration: none;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-5px);
        }
        .news-card {
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--box-shadow);
            margin-bottom: 30px;
            height: 100%;
            transition: transform var(--transition-speed);
        }
        .news-card:hover {
            transform: translateY(-10px);
        }
        .news-card img {
            width: 100%;
            height: 220px;
            object-fit: cover;
        }
        .news-content {
            padding: 25px;
        }
        .news-date {
            color: var(--secondary-color);
            font-weight: 600;
            font-size: 0.9rem;
            margin-bottom: 10px;
        }
        .contact-info-box {
            background: white;
            border-radius: var(--border-radius);
            padding: 30px;
            box-shadow: var(--box-shadow);
            text-align: center;
            height: 100%;
            transition: all var(--transition-speed);
        }
        .contact-info-box:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        .contact-icon {
            font-size: 2.5rem;
            color: var(--secondary-color);
            margin-bottom: 20px;
        }
        .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 var(--transition-speed);
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: var(--secondary-color);
            transform: translateY(-5px);
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 120px 0 80px;
            }
            .hero-section h1 {
                font-size: 2.5rem;
            }
            .section-padding {
                padding: 60px 0;
            }
            .stat-number {
                font-size: 2.5rem;
            }
        }