:root {
            --primary-color: #0066cc;
            --secondary-color: #004d99;
            --accent-color: #00a86b;
            --light-bg: #f8f9fa;
            --dark-text: #333;
            --transition-speed: 0.3s;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: var(--dark-text);
            line-height: 1.8;
            overflow-x: hidden;
        }
        h1, h2, h3, h4 {
            font-weight: 700;
            color: var(--secondary-color);
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.95);
            box-shadow: 0 4px 12px rgba(0,0,0,0.08);
            transition: all var(--transition-speed);
            padding-top: 1rem;
            padding-bottom: 1rem;
        }
        .navbar-brand {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-color) !important;
        }
        .navbar-nav .nav-link {
            color: #555 !important;
            font-weight: 600;
            padding: 0.5rem 1.2rem;
            transition: color var(--transition-speed);
            position: relative;
        }
        .navbar-nav .nav-link:hover, .navbar-nav .nav-link.active {
            color: var(--primary-color) !important;
        }
        .navbar-nav .nav-link:hover::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 1.2rem;
            right: 1.2rem;
            height: 3px;
            background-color: var(--accent-color);
            border-radius: 2px;
        }
        .hero {
            background: linear-gradient(135deg, rgba(0,102,204,0.85) 0%, rgba(0,77,153,0.9) 100%), url('https://images.unsplash.com/photo-1532187863486-abf9dbad1b69?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover no-repeat;
            color: white;
            padding: 8rem 0;
            text-align: center;
        }
        .hero h1 {
            color: white;
            font-size: 3.5rem;
            margin-bottom: 1.5rem;
            text-shadow: 0 2px 10px rgba(0,0,0,0.2);
        }
        .hero p {
            font-size: 1.3rem;
            max-width: 800px;
            margin: 0 auto 2rem;
        }
        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            padding: 0.8rem 2.5rem;
            font-weight: 600;
            border-radius: 50px;
            transition: all var(--transition-speed);
        }
        .btn-primary:hover {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.15);
        }
        .section {
            padding: 6rem 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: 4rem;
            position: relative;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: -15px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background-color: var(--accent-color);
            border-radius: 2px;
        }
        .card {
            border: none;
            border-radius: 15px;
            overflow: hidden;
            transition: transform var(--transition-speed), box-shadow var(--transition-speed);
            height: 100%;
            box-shadow: 0 8px 25px rgba(0,0,0,0.08);
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 35px rgba(0,0,0,0.15);
        }
        .card-img-top {
            height: 220px;
            object-fit: cover;
            transition: transform var(--transition-speed);
        }
        .card:hover .card-img-top {
            transform: scale(1.05);
        }
        .card-body {
            padding: 2rem;
        }
        .icon-box {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.5rem;
            font-size: 2rem;
            transition: transform var(--transition-speed);
        }
        .icon-box:hover {
            transform: rotate(15deg) scale(1.1);
        }
        .stats {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            padding: 4rem 0;
        }
        .stat-number {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 0.5rem;
        }
        .news-item {
            border-left: 5px solid var(--accent-color);
            padding-left: 1.5rem;
            margin-bottom: 2.5rem;
            transition: border-color var(--transition-speed);
        }
        .news-item:hover {
            border-left-color: var(--primary-color);
        }
        .friendlink {
            background-color: var(--light-bg);
            padding: 4rem 0;
        }
        .flink {
            display: inline-block;
            background: white;
            color: var(--dark-text);
            padding: 1rem 2rem;
            margin: 0.8rem;
            border-radius: 10px;
            text-decoration: none;
            font-weight: 600;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: all var(--transition-speed);
            border: 2px solid transparent;
        }
        .flink:hover {
            color: var(--primary-color);
            border-color: var(--primary-color);
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        }
        footer {
            background-color: #222;
            color: #ccc;
            padding: 4rem 0 2rem;
        }
        footer a {
            color: #aaa;
            text-decoration: none;
            transition: color var(--transition-speed);
        }
        footer a:hover {
            color: white;
            text-decoration: underline;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .social-icons a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background-color: #444;
            color: white;
            border-radius: 50%;
            margin-right: 0.8rem;
            transition: background-color var(--transition-speed);
        }
        .social-icons a:hover {
            background-color: var(--primary-color);
        }
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.5rem;
            }
            .section {
                padding: 4rem 0;
            }
            .navbar-nav .nav-link {
                padding: 0.5rem 0;
            }
        }