:root {
            --primary-color: #1e3a8a;
            --secondary-color: #dc2626;
            --accent-color: #fbbf24;
            --light-color: #f8f9fa;
            --dark-color: #1f2937;
            --font-family-sans: "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
        }
        body {
            font-family: var(--font-family-sans);
            line-height: 1.6;
            color: #333;
            background-color: #fff;
        }
        .navbar-brand {
            font-weight: 700;
            color: var(--primary-color) !important;
        }
        .hero-section {
            background: linear-gradient(135deg, var(--primary-color) 0%, #2563eb 100%);
            color: white;
            padding: 100px 0;
            position: relative;
            overflow: hidden;
        }
        .hero-section h1 {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 1rem;
        }
        .hero-section p {
            font-size: 1.2rem;
            opacity: 0.9;
        }
        .section-title {
            color: var(--primary-color);
            border-left: 5px solid var(--secondary-color);
            padding-left: 15px;
            margin-bottom: 2rem;
            font-weight: 700;
        }
        .card {
            border: none;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            height: 100%;
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        .card-img-top {
            border-radius: 12px 12px 0 0;
            height: 200px;
            object-fit: cover;
        }
        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            padding: 10px 30px;
            border-radius: 30px;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .btn-primary:hover {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
            transform: scale(1.05);
        }
        .feature-icon {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        .news-item {
            border-bottom: 1px solid #eee;
            padding: 20px 0;
            transition: background-color 0.3s ease;
        }
        .news-item:hover {
            background-color: #f9f9f9;
        }
        .friendlink {
            background-color: #f8f9fa;
            padding: 60px 0;
        }
        .flink {
            display: inline-block;
            margin: 10px 15px;
            padding: 10px 20px;
            background-color: white;
            border-radius: 8px;
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 600;
            border: 2px solid transparent;
            transition: all 0.3s ease;
            box-shadow: 0 3px 10px rgba(0,0,0,0.05);
        }
        .flink:hover {
            border-color: var(--secondary-color);
            color: var(--secondary-color);
            transform: translateY(-3px);
        }
        footer {
            background-color: var(--dark-color);
            color: white;
            padding: 60px 0 20px;
        }
        footer a {
            color: #ccc;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        footer a:hover {
            color: var(--accent-color);
        }
        .social-icons a {
            display: inline-block;
            margin: 0 10px;
            font-size: 1.5rem;
            color: white;
            transition: transform 0.3s ease, color 0.3s ease;
        }
        .social-icons a:hover {
            color: var(--accent-color);
            transform: scale(1.2);
        }
        @media (max-width: 768px) {
            .hero-section h1 {
                font-size: 2.5rem;
            }
            .hero-section p {
                font-size: 1rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }
        .sticky-nav {
            position: sticky;
            top: 0;
            z-index: 1020;
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
        }
        .content-article {
            text-align: justify;
            margin-bottom: 30px;
        }
        .content-article h3 {
            color: var(--primary-color);
            margin-top: 2rem;
        }
        .stats-number {
            font-size: 3rem;
            font-weight: 800;
            color: var(--secondary-color);
            line-height: 1;
        }
        .stats-label {
            font-size: 1rem;
            color: #666;
            text-transform: uppercase;
            letter-spacing: 1px;
        }