:root {
            --primary-blue: #1a73e8;
            --dark-blue: #0d47a1;
            --light-blue: #e8f0fe;
            --accent-blue: #4285f4;
        }
        
        body {
            font-family: 'Noto Sans SC', sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f9f9f9;
        }
        
        /* 导航栏样式 */
        .navbar {
            background-color: var(--primary-blue);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        }
        
        .navbar-brand {
            font-weight: 700;
            color: white !important;
            font-size: 1.5rem;
        }
        
        .nav-link {
            color: rgba(255, 255, 255, 0.9) !important;
            font-weight: 500;
            padding: 0.5rem 1rem;
            transition: all 0.3s;
        }
        
        .nav-link:hover {
            color: white !important;
            transform: translateY(-2px);
        }
        
        /* 英雄区域 */
        .hero-section {
            background: linear-gradient(135deg, var(--primary-blue), var(--dark-blue));
            color: white;
            padding: 5rem 0;
            margin-bottom: 3rem;
        }
        
        .hero-title {
            font-weight: 700;
            font-size: 2.5rem;
            margin-bottom: 1.5rem;
        }
        
        .hero-subtitle {
            font-weight: 300;
            font-size: 1.25rem;
            margin-bottom: 2rem;
            opacity: 0.9;
        }
        
        /* 内容区域 */
        .section-title {
            color: var(--dark-blue);
            font-weight: 700;
            margin-bottom: 2rem;
            position: relative;
            padding-bottom: 0.5rem;
        }
        
        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 3px;
            background-color: var(--accent-blue);
        }
        
        /* 文章卡片 */
        .article-card {
            border: none;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
            margin-bottom: 2rem;
            background-color: white;
        }
        
        .article-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        }
        
        .article-img {
            height: 200px;
            object-fit: cover;
            width: 100%;
        }
        
        .article-title {
            color: var(--dark-blue);
            font-weight: 600;
            margin-bottom: 0.75rem;
        }
        
        .article-meta {
            color: #666;
            font-size: 0.9rem;
            margin-bottom: 1rem;
        }
        
        .article-excerpt {
            color: #555;
            margin-bottom: 1.5rem;
        }
        
        .read-more {
            color: var(--primary-blue);
            font-weight: 500;
            text-decoration: none;
            transition: all 0.3s;
        }
        
        .read-more:hover {
            color: var(--dark-blue);
            text-decoration: underline;
        }
        
        /* 页脚 */
        .footer {
            background-color: var(--dark-blue);
            color: white;
            padding: 3rem 0;
            margin-top: 3rem;
        }
        
        .footer-title {
            font-weight: 600;
            margin-bottom: 1.5rem;
        }
        
        .footer-link {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
            display: block;
            margin-bottom: 0.5rem;
            transition: all 0.3s;
        }
        
        .footer-link:hover {
            color: white;
            text-decoration: none;
            transform: translateX(5px);
        }
        
        /* 响应式调整 */
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2rem;
            }
            
            .hero-subtitle {
                font-size: 1.1rem;
            }
            
            .navbar-brand {
                font-size: 1.2rem;
            }
        }