/* 推荐系统样式 */
        .recommendations-section {
            margin: 30px 0;
            padding: 20px;
            background: #f8f9fa;
            border-radius: 8px;
        }

        .recommendations-section h3 {
            color: #333;
            margin-bottom: 20px;
            font-size: 1.2em;
        }

        .recommendations-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 15px;
        }

        .recommendation-card {
            background: white;
            border-radius: 6px;
            padding: 15px;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
            transition: transform 0.2s, box-shadow 0.2s;
        }

        .recommendation-card:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 8px rgba(0,0,0,0.15);
        }

        .recommendation-card a {
            text-decoration: none;
            color: inherit;
        }

        .recommendation-card h4 {
            color: #2c3e50;
            margin: 0 0 10px 0;
            font-size: 1em;
        }

        .recommendation-card p {
            color: #666;
            font-size: 0.9em;
            margin: 0 0 10px 0;
            line-height: 1.4;
        }

        .recommendation-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.8em;
        }

        .similarity {
            color: #27ae60;
            font-weight: bold;
        }

        .reason {
            color: #7f8c8d;
        }

        @media (max-width: 768px) {
            .recommendations-grid {
                grid-template-columns: 1fr;
            }
        }