body {
            font-family: 'Microsoft YaHei', Arial, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f5f5f5;
            background-image: linear-gradient(135deg, #f5f5f5 0%, #e8f4fd 100%);
        }
        
        /* 头部样式 */
        .header {
            background: linear-gradient(135deg, #1a5276 0%, #3498db 100%);
            color: white;
            padding: 2rem 1rem;
            text-align: center;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        }
        
        .header-content {
            max-width: 1200px;
            margin: 0 auto;
        }
        
        h2 {
            font-size: 2.5rem;
            margin-bottom: 1rem;
            font-weight: 700;
        }
        
        .subtitle {
            font-size: 1.2rem;
            opacity: 0.9;
            max-width: 800px;
            margin: 0 auto;
            color: white;
        }
        
        /* 主体容器 */
        .container {
            max-width: 1200px;
            margin: 2rem auto;
            padding: 0 1rem;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
        }
        
        /* 主要内容区域 */
        main {
            background: white;
            border-radius: 12px;
            padding: 2rem;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
        }
        
        section {
            margin-bottom: 2.5rem;
            animation: fadeIn 0.6s ease-in;
        }
        
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        h3 {
            color: #1a5276;
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #3498db;
            font-size: 1.8rem;
        }
        
        h4 {
            color: #2874a6;
            margin: 1.5rem 0 1rem;
            font-size: 1.4rem;
        }
        
        p {
            margin-bottom: 1rem;
            text-align: justify;
            color: #555;
        }
        
        ul, ol {
            margin-bottom: 1.5rem;
            padding-left: 1.5rem;
        }
        
        li {
            margin-bottom: 0.5rem;
            color: #555;
        }
        
        /* 侧边栏样式 */
        aside {
            background: white;
            border-radius: 12px;
            padding: 2rem;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
            position: sticky;
            top: 2rem;
            height: fit-content;
        }
        
        .sidebar-title {
            color: #1a5276;
            margin-bottom: 1.5rem;
            font-size: 1.4rem;
            text-align: center;
        }
        
        .article-list {
            list-style: none;
            padding: 0;
        }
        
        .article-item {
            margin-bottom: 1rem;
            transition: transform 0.3s ease;
        }
        
        .article-item:hover {
            transform: translateX(5px);
        }
        
        .article-link {
            display: block;
            padding: 0.8rem;
            background: linear-gradient(90deg, #f8f9fa 0%, #e9ecef 100%);
            border-radius: 8px;
            color: #2c3e50;
            text-decoration: none;
            font-weight: 500;
            border-left: 3px solid #3498db;
            transition: all 0.3s ease;
        }
        
        .article-link:hover {
            background: linear-gradient(90deg, #e3f2fd 0%, #bbdefb 100%);
            color: #1a5276;
            border-left-color: #1a5276;
        }
        
        /* 特色卡片 */
        .feature-cards {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        
        .feature-card {
            background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
            border-radius: 12px;
            padding: 1.5rem;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            border-top: 4px solid #3498db;
        }
        
        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
        }
        
        .feature-title {
            color: #1a5276;
            margin-bottom: 1rem;
            font-size: 1.2rem;
        }
        
        /* 备考阶段时间线 */
        .timeline {
            position: relative;
            margin: 2rem 0;
            padding-left: 2rem;
        }
        
        .timeline::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background: linear-gradient(to bottom, #3498db, #1a5276);
            border-radius: 3px;
        }
        
        .timeline-item {
            position: relative;
            margin-bottom: 2rem;
            padding-left: 1.5rem;
        }
        
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -2rem;
            top: 0.5rem;
            width: 15px;
            height: 15px;
            background: white;
            border: 3px solid #3498db;
            border-radius: 50%;
        }
        
        .timeline-title {
            color: #1a5276;
            font-weight: 600;
            margin-bottom: 0.5rem;
        }
        
        /* 关键信息高亮 */
        .highlight {
            background: linear-gradient(120deg, #a8edea 0%, #fed6e3 100%);
            padding: 1.5rem;
            border-radius: 10px;
            margin: 1.5rem 0;
            border-left: 4px solid #f39c12;
        }
        
        .highlight-title {
            color: #d35400;
            font-weight: 700;
            margin-bottom: 0.8rem;
            font-size: 1.2rem;
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .container {
                grid-template-columns: 1fr;
            }
            
            aside {
                position: relative;
                top: 0;
            }
            
            h2 {
                font-size: 2rem;
            }
        }
        
        @media (max-width: 768px) {
            main, aside {
                padding: 1.5rem;
            }
            
            .feature-cards {
                grid-template-columns: 1fr;
            }
            
            h2 {
                font-size: 1.8rem;
            }
            
            h3 {
                font-size: 1.5rem;
            }
        }