body { background: #fafafa; }
        .main-content { max-width: 900px; margin: 0 auto; }
        .topic-title { font-size: 22px; font-weight: bold; margin-bottom: 18px; color: #e74c3c; }
        .post-thumb { width: 100%; max-height: 120px; object-fit: cover; border-radius: 6px; }
        .post-title { font-size: 17px; font-weight: bold; margin-bottom: 4px; }
        .post-date { font-size: 13px; color: #888; margin-bottom: 6px; }
        .post-desc { font-size: 15px; color: #333; }
        .post-item { margin-bottom: 22px; }
        .sidebar-block { background: #f6f6f6; border-radius: 6px; padding: 18px 16px; margin-bottom: 18px; }
        .sidebar-block h5 { font-weight: bold; font-size: 18px; margin-bottom: 10px; border-bottom: 3px solid #e74c3c; display: inline-block; padding-bottom: 2px; }
        .topic-list, .keyword-list { list-style: none; padding-left: 0; margin-bottom: 0; }
        .topic-list li { margin-bottom: 7px; font-size: 16px; }
        .topic-list a { color: #222; text-decoration: none; transition: color 0.2s; }
        .topic-list a:hover { color: #e74c3c; text-decoration: underline; }
        .keyword-list { display: flex; flex-wrap: wrap; gap: 7px; }
        .keyword-list li { margin-bottom: 0; }
        .keyword-tag { background: #e74c3c; color: #fff; border-radius: 4px; padding: 4px 12px; font-size: 15px; display: inline-block; margin-bottom: 7px; text-decoration: none; transition: background 0.2s; }
        .keyword-tag:hover { background: #c0392b; color: #fff; text-decoration: underline; }
        .search-box { position: relative; margin-bottom: 18px; }
        .search-box input { border-radius: 4px; border: 1px solid #ccc; padding: 6px 32px 6px 10px; width: 100%; }
        .search-box button { position: absolute; right: 0; top: 0; height: 100%; border: none; background: none; color: #e74c3c; font-size: 18px; padding: 0 10px; }
        @media (max-width: 991px) {
            .main-content { max-width: 100%; }
        }
        @media (max-width: 767px) {
            .post-thumb { max-height: 70px; }
        }