/* 全局字体与平滑滚动 */
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
            line-height: 1.75;
            color: #1f2937;
            background-color: #f9fafb;
            scroll-behavior: smooth;
        }
        
        /* 文章排版优化 - 增加段落间距 */
        .article-content {
            font-size: 1.125rem;
            color: #374151;
        }
        .article-content p {
            margin-bottom: 2rem;
            text-align: justify;
            letter-spacing: 0.025em;
            text-indent: 2em;
            line-height: 2;
        }
        /* 首段不缩进 */
        .article-content p.lead,
        .article-content p:first-of-type {
            text-indent: 0;
        }
        .article-content h2 {
            font-size: 1.75rem;
            font-weight: 800;
            margin-top: 3.5rem;
            margin-bottom: 1.5rem;
            color: #111827;
            position: relative;
            padding-left: 1.5rem;
        }
        .article-content h2::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0.25rem;
            bottom: 0.25rem;
            width: 4px;
            background: linear-gradient(to bottom, #3b82f6, #2563eb);
            border-radius: 2px;
        }
        .article-content h3 {
            font-size: 1.35rem;
            font-weight: 700;
            margin-top: 2.5rem;
            margin-bottom: 1.25rem;
            color: #1f2937;
        }
        .article-content ul, .article-content ol {
            margin-bottom: 2rem;
            padding-left: 1.5rem;
        }
        .article-content li {
            margin-bottom: 0.75rem;
            position: relative;
        }
        .article-content ul li::marker {
            color: #3b82f6;
        }
        
        /* 段落之间分隔 */
        .article-content p + p {
            padding-top: 0;
        }
        
        /* 重点文本高亮 */
        .highlight-text {
            background: linear-gradient(120deg, #e0f2fe 0%, #e0f2fe 100%);
            background-repeat: no-repeat;
            background-size: 100% 40%;
            background-position: 0 88%;
            font-weight: 600;
            color: #0369a1;
        }

        /* 卡片悬停效果 */
        .hover-card {
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .hover-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
        }

        /* 目录导航激活状态 */
        .toc-link.active {
            color: #2563eb;
            font-weight: 600;
            border-left: 2px solid #2563eb;
            padding-left: 0.75rem;
        }
        
        /* 图片懒加载占位 */
        img.lazy-load {
            background-color: #e5e7eb;
            min-height: 200px;
        }
        
        /* 段落内图片间距 */
        .article-content .news-image {
            margin: 2.5rem 0;
        }
        
        /* 引用块样式 */
        .article-content .quote-block {
            margin: 2rem 0;
            padding: 1.5rem 2rem;
            background: #f8fafc;
            border-left: 4px solid #3b82f6;
            border-radius: 0 8px 8px 0;
            font-style: italic;
            color: #475569;
        }