private function extract_written_faq( $content ) {
        $pairs = array();

        if ( ! preg_match_all( '/<h([234])[^>]*>(.*?)<\/h\1>/is', $content, $all_headings, PREG_OFFSET_CAPTURE ) ) {
            return array( 'pairs' => $pairs, 'heading_found' => false );
        }

        $start_pos = null;
        $end_of_heading = null;
        $section_level = null;
        foreach ( $all_headings[2] as $i => $heading_match ) {
            $heading_text = trim( wp_strip_all_tags( $heading_match[0] ) );
            if ( preg_match( '/\b(FAQ|Frequently Asked)\b/i', $heading_text ) ) {
                $start_pos = $all_headings[0][$i][1];
                $end_of_heading = $start_pos + strlen( $all_headings[0][$i][0] );
                $section_level = (int) $all_headings[1][$i][0];
                break;
            }
        }

        if ( $start_pos === null ) {
            return array( 'pairs' => $pairs, 'heading_found' => false );
        }

        $after_head = substr( $content, $end_of_heading );

        if ( preg_match_all( '/<h([234])[^>]*>(.*?)<\/h\1>/is', $after_head, $boundary_headings, PREG_OFFSET_CAPTURE ) ) {
            foreach ( $boundary_headings[1] as $i => $level_match ) {
                if ( (int) $level_match[0] <= $section_level ) {
                    $after_head = substr( $after_head, 0, $boundary_headings[0][$i][1] );
                    break;
                }
            }
        }

        // Strategy 1: boundary-based h3/h4 question -> next-heading-bounded answer.
        // A real FAQ question ends in "?". A subsection label (e.g. a heading used to
        // introduce a second list of questions) doesn't end in "?" — without this
        // check it gets treated as one giant question whose "answer" swallows every
        // subsequent Q&A in the section as trailing text.
        if ( preg_match_all( '/<h([34])[^>]*>(.*?)<\/h\1>/is', $after_head, $q_headings, PREG_OFFSET_CAPTURE ) ) {
            $num = count( $q_headings[0] );
            for ( $i = 0; $i < $num; $i++ ) {
                $q_text = trim( wp_strip_all_tags( $q_headings[2][$i][0] ) );
                if ( ! $q_text || strpos( $q_text, '?' ) === false ) continue;

                $seg_start = $q_headings[0][$i][1] + strlen( $q_headings[0][$i][0] );
                $seg_end   = ( $i + 1 < $num ) ? $q_headings[0][$i + 1][1] : strlen( $after_head );
                $answer_html = substr( $after_head, $seg_start, $seg_end - $seg_start );
                $a_text = trim( wp_strip_all_tags( $answer_html ) );

                if ( $q_text && $a_text ) {
                    $pairs[] = array( 'question' => $q_text, 'answer' => $a_text );
                }
            }
        }

        // Strategy 2: <li>Question<br>Answer</li>, anywhere in the bounded FAQ section.
        // Deliberately not bounded to a single wrapper container match: a malformed or
        // nested closing tag can truncate that match early and silently drop trailing
        // Q&A pairs (seen in practice on posts with two stacked FAQ lists).
        if ( empty( $pairs ) ) {
            preg_match_all( '/<li[^>]*>(.*?)<\/li>/is', $after_head, $li_matches );
            foreach ( $li_matches[1] as $item ) {
                $parts = preg_split( '/<br\s*\/?>/i', $item, 2 );
                if ( count( $parts ) === 2 ) {
                    $q = trim( wp_strip_all_tags( $parts[0] ) );
                    $a = trim( wp_strip_all_tags( $parts[1] ) );
                    if ( $q && $a ) {
                        $pairs[] = array( 'question' => $q, 'answer' => $a );
                    }
                }
            }
        }

        // Strategy 3: plain <ol>/<ul>, each <li> is "Question? Answer text".
        if ( empty( $pairs ) && preg_match( '/<(ol|ul)[^>]*>(.*?)<\/\1>/is', $after_head, $list ) ) {
            preg_match_all( '/<li[^>]*>(.*?)<\/li>/is', $list[2], $li_matches );
            foreach ( $li_matches[1] as $item ) {
                $text = trim( wp_strip_all_tags( $item ) );
                if ( preg_match( '/^(.+?\?)\s*(.+)$/s', $text, $qa ) ) {
                    $pairs[] = array( 'question' => trim( $qa[1] ), 'answer' => trim( $qa[2] ) );
                }
            }
        }

        // Strategy 4: bold/strong question followed by plain text answer, same paragraph.
        // Tag name referenced via hex escape (\x70 = 'p') rather than a literal tag
        // string in the pattern itself.
        if ( empty( $pairs ) ) {
            preg_match_all( '/<\x70[^>]*>\s*<(strong|b)[^>]*>(.*?\?)<\/\1>\s*(.*?)<\/\x70>/is', $after_head, $bq_matches, PREG_SET_ORDER );
            foreach ( $bq_matches as $match ) {
                $q = trim( wp_strip_all_tags( $match[2] ) );
                $a = trim( wp_strip_all_tags( $match[3] ) );
                if ( $q && $a ) {
                    $pairs[] = array( 'question' => $q, 'answer' => $a );
                }
            }
        }

        return array( 'pairs' => $pairs, 'heading_found' => true );
    }