@php
    $v3 = $v3 ?? [];
    $summary = $v3['summary'] ?? [];
    $radar = $v3['radar'] ?? [];
    $modules = $v3['modules'] ?? [];
    $paths = $v3['paths'] ?? ['keep' => [], 'boost' => [], 'key' => []];

    $rawPaperId = $paper['id'] ?? $paper['paper_id'] ?? 'unknown';
    preg_match('/paper_(\d{15})/', $rawPaperId, $matches);
    $reportCode = $matches[1] ?? preg_replace('/[^0-9]/', '', (string) $rawPaperId);
    $generateDateTime = now()->format('Y年m月d日 H:i:s');

    $scoreObtained = $summary['score_obtained'] ?? null;
    $scoreTotal = $summary['score_total'] ?? null;
    $scoreRate = $summary['score_rate'] ?? null;
    $averageMastery = $summary['average_mastery'] ?? null;
    $overallLabel = $summary['overall_label'] ?? '待评估';
    $difficultySummary = $summary['difficulty'] ?? [];
    $comparisonSummary = $summary['comparison'] ?? [];
    $overallLabelDetail = $summary['overall_label_detail'] ?? [];
    $historySummary = $comparisonSummary['history'] ?? [];
    $peerSummary = $comparisonSummary['peers'] ?? [];
    $overallScore = isset($overallLabelDetail['composite_score']) ? (float) $overallLabelDetail['composite_score'] : null;
    $overallGrade = (string) ($overallLabelDetail['grade'] ?? 'D');
    $currentPart = (float) ($overallLabelDetail['current_score'] ?? 0);
    $historyPart = (float) ($overallLabelDetail['history_score'] ?? 0);
    $peerPart = (float) ($overallLabelDetail['peer_score'] ?? 0);
    $adjustPart = (float) ($overallLabelDetail['difficulty_adjust'] ?? 0);
    $compositeFormulaResult = (0.50 * $currentPart) + (0.25 * $historyPart) + (0.25 * $peerPart) + $adjustPart;
    $overallBadge = function (string $grade): array {
        return match ($grade) {
            'S' => ['bg' => '#f5f3ff', 'border' => '#6d28d9', 'text' => '#6d28d9', 'class' => 'badge-s'],
            'A' => ['bg' => '#ecfdf3', 'border' => '#22c55e', 'text' => '#166534', 'class' => 'badge-excellent'],
            'B' => ['bg' => '#eff6ff', 'border' => '#3b82f6', 'text' => '#1d4ed8', 'class' => 'badge-good'],
            'C' => ['bg' => '#fff7ed', 'border' => '#f59e0b', 'text' => '#b45309', 'class' => 'badge-average'],
            default => ['bg' => '#fef2f2', 'border' => '#ef4444', 'text' => '#b91c1c', 'class' => 'badge-weak'],
        };
    };
    $overallVisual = $overallBadge((string) $overallGrade);
    $trendVisual = function (string $trend): array {
        return match ($trend) {
            '显著提升' => ['icon' => '▲', 'color' => '#16a34a'],
            '小幅提升' => ['icon' => '↗', 'color' => '#0ea5e9'],
            '基本持平' => ['icon' => '•', 'color' => '#64748b'],
            '小幅回落' => ['icon' => '↘', 'color' => '#f59e0b'],
            '明显回落' => ['icon' => '▼', 'color' => '#ef4444'],
            default => ['icon' => '•', 'color' => '#64748b'],
        };
    };

    $statusColor = function (string $status): string {
        return match ($status) {
            '良好' => '#16a34a',
            '一般' => '#f97316',
            '薄弱' => '#e11d48',
            default => '#64748b',
        };
    };

    $n = max(1, count($radar));
    $cx = 210;
    $cy = 155;
    $r = 108;
    $outer = [];
    $inner = [];
    for ($i = 0; $i < $n; $i++) {
        $angle = -M_PI / 2 + (2 * M_PI * $i / $n);
        $ox = $cx + $r * cos($angle);
        $oy = $cy + $r * sin($angle);
        $outer[] = [$ox, $oy];

        $value = isset($radar[$i]['value']) ? (float) $radar[$i]['value'] : 0.0;
        $ratio = max(0.0, min(1.0, $value / 5));
        $ix = $cx + $r * $ratio * cos($angle);
        $iy = $cy + $r * $ratio * sin($angle);
        $inner[] = [$ix, $iy];
    }
    $outerPoints = implode(' ', array_map(fn ($p) => round($p[0], 2).','.round($p[1], 2), $outer));
    $innerPoints = implode(' ', array_map(fn ($p) => round($p[0], 2).','.round($p[1], 2), $inner));

    $insightMap = [];
    foreach (($question_insights ?? []) as $insight) {
        $no = $insight['question_number'] ?? $insight['question_id'] ?? null;
        if ($no !== null) {
            $insightMap[$no] = $insight;
        }
    }

    $analysisWrongMap = [];
    foreach (($analysis_data['question_analysis'] ?? []) as $qa) {
        $qid = $qa['question_bank_id'] ?? $qa['question_id'] ?? null;
        if ($qid === null || $qid === '') {
            continue;
        }
        $rawCorrect = $qa['is_correct'] ?? null;
        $isWrongFromAnalysis = false;
        if (is_array($rawCorrect)) {
            $isWrongFromAnalysis = in_array(0, $rawCorrect, true);
        } elseif ($rawCorrect !== null) {
            $isWrongFromAnalysis = !boolval($rawCorrect);
        }
        if ($isWrongFromAnalysis) {
            $analysisWrongMap[(string) $qid] = true;
        }
    }

    $wrongQuestions = [];
    foreach (($questions ?? []) as $qItem) {
        $isCorrectProbe = $qItem['is_correct'] ?? null;
        $studentAnswerProbe = $qItem['student_answer'] ?? null;
        $correctAnswerProbe = $qItem['answer'] ?? ($qItem['correct_answer'] ?? null);
        if ($isCorrectProbe === null && !empty($studentAnswerProbe) && !empty($correctAnswerProbe)) {
            $isCorrectProbe = (trim((string) $studentAnswerProbe) === trim((string) $correctAnswerProbe)) ? 1 : 0;
        }
        $normalizedCorrect = $isCorrectProbe;
        if ($isCorrectProbe !== null) {
            $normalizedCorrect = is_bool($isCorrectProbe) ? ($isCorrectProbe ? 1 : 0) : intval($isCorrectProbe);
        }
        $qidProbe = (string) ($qItem['question_bank_id'] ?? $qItem['question_id'] ?? '');
        $isWrongByAnalysis = ($qidProbe !== '' && isset($analysisWrongMap[$qidProbe]));
        if ($normalizedCorrect === 0 || $isWrongByAnalysis) {
            $wrongQuestions[] = $qItem;
        }
    }

    $kpStats = [];
    foreach (($questions ?? []) as $qItem) {
        $kpName = trim((string) ($qItem['knowledge_point_name'] ?? $qItem['knowledge_point'] ?? '未标注知识点'));
        $kpName = $kpName === '' ? '未标注知识点' : $kpName;
        if (!isset($kpStats[$kpName])) {
            $kpStats[$kpName] = ['total' => 0, 'wrong' => 0];
        }
        $kpStats[$kpName]['total']++;
    }
    foreach ($wrongQuestions as $qItem) {
        $kpName = trim((string) ($qItem['knowledge_point_name'] ?? $qItem['knowledge_point'] ?? '未标注知识点'));
        $kpName = $kpName === '' ? '未标注知识点' : $kpName;
        if (!isset($kpStats[$kpName])) {
            $kpStats[$kpName] = ['total' => 0, 'wrong' => 0];
        }
        $kpStats[$kpName]['wrong']++;
    }
    $kpWrongStats = [];
    foreach ($kpStats as $kpName => $stat) {
        if (($stat['wrong'] ?? 0) <= 0) {
            continue;
        }
        $total = max(1, intval($stat['total'] ?? 0));
        $wrong = intval($stat['wrong'] ?? 0);
        $kpWrongStats[] = [
            'kp_name' => $kpName,
            'wrong' => $wrong,
            'total' => $total,
            'rate' => $wrong / $total,
        ];
    }
    usort($kpWrongStats, function ($a, $b) {
        if ($a['rate'] === $b['rate']) {
            return $b['wrong'] <=> $a['wrong'];
        }
        return $b['rate'] <=> $a['rate'];
    });

    $childMasteryStatus = function ($mastery): string {
        if ($mastery === null) {
            return '未学习';
        }
        $m = (float) $mastery * 100; // 与 math.client-pc 统一：0-100 阈值（85/60）
        if ($m >= 85) {
            return '已掌握';
        }
        if ($m >= 60) {
            return '薄弱';
        }
        return '未入门';
    };
    $childStatusColor = function ($status): string {
        return match ($status) {
            '已掌握' => '#52c41a',
            '薄弱' => '#faad14',
            '未入门' => '#f5222d',
            default => '#d9d9d9',
        };
    };
    $calcStats = function (array $points): array {
        $total = count($points);
        $learned = 0;
        $mastered = 0;
        $weak = 0;
        $beginner = 0;
        $unlearned = 0;
        foreach ($points as $p) {
            if (($p['mastery_level'] ?? null) !== null) {
                $learned++;
            }
            $status = (string) ($p['status'] ?? '未学习');
            if ($status === '已掌握') {
                $mastered++;
            } elseif ($status === '薄弱') {
                $weak++;
            } elseif ($status === '未入门') {
                $beginner++;
            } else {
                $unlearned++;
            }
        }
        return [
            'total' => $total,
            'learned' => $learned,
            'mastered' => $mastered,
            'weak' => $weak,
            'beginner' => $beginner,
            'unlearned' => $unlearned,
        ];
    };

    $clusterCards = [];
    $allClusterPoints = [];
    foreach ($radar as $moduleItem) {
        $children = is_array($moduleItem['children'] ?? null) ? $moduleItem['children'] : [];
        $greatMap = [];
        foreach ($children as $child) {
            $greatKey = trim((string) ($child['great_grand_parent_name'] ?? ''));
            $greatKey = $greatKey !== '' ? $greatKey : '未分组';
            $grandKey = trim((string) ($child['grand_parent_name'] ?? ''));
            $grandKey = $grandKey !== '' ? $grandKey : '未分组';
            $parentName = trim((string) ($child['parent_name'] ?? ''));
            if ($parentName === '') {
                $parentCode = trim((string) ($child['parent_code'] ?? ''));
                $parentName = $parentCode !== '' ? $parentCode : '未分组';
            }
            $mastery = isset($child['mastery_level']) ? (float) $child['mastery_level'] : null;
            $status = $childMasteryStatus($mastery);
            if (!isset($greatMap[$greatKey])) {
                $greatMap[$greatKey] = [];
            }
            if (!isset($greatMap[$greatKey][$grandKey])) {
                $greatMap[$greatKey][$grandKey] = [];
            }
            if (!isset($greatMap[$greatKey][$grandKey][$parentName])) {
                $greatMap[$greatKey][$grandKey][$parentName] = [];
            }
            $greatMap[$greatKey][$grandKey][$parentName][] = [
                'code' => (string) ($child['code'] ?? ''),
                'name' => (string) ($child['name'] ?? '未命名知识点'),
                'path' => (string) ($child['path'] ?? ''),
                'mastery_level' => $mastery,
                'change' => isset($child['change']) ? (float) $child['change'] : null,
                'status' => $status,
                'color' => $childStatusColor($status),
                'is_hit' => !empty($child['is_hit']),
            ];
        }

        $greatGroups = [];
        foreach ($greatMap as $greatName => $grandMap) {
            $grandGroups = [];
            foreach ($grandMap as $grandName => $parentMap) {
                $parentGroups = [];
                foreach ($parentMap as $parentName => $points) {
                    usort($points, function ($a, $b) {
                        $am = $a['mastery_level'] ?? -1;
                        $bm = $b['mastery_level'] ?? -1;
                        if ($am === $bm) {
                            return strcmp((string) ($a['name'] ?? ''), (string) ($b['name'] ?? ''));
                        }
                        return $bm <=> $am;
                    });
                    $parentGroups[] = [
                        'parent_name' => $parentName,
                        'points' => $points,
                        'stats' => $calcStats($points),
                    ];
                }
                // 子模块级过滤：整行没有任何掌握度数字则不显示
                $parentGroups = array_values(array_filter($parentGroups, function ($pg) {
                    return (($pg['stats']['learned'] ?? 0) > 0);
                }));
                if (empty($parentGroups)) {
                    continue;
                }
                usort($parentGroups, function ($a, $b) {
                    $sa = $a['stats'];
                    $sb = $b['stats'];
                    return ($sb['learned'] <=> $sa['learned']) ?: ($sb['total'] <=> $sa['total']);
                });
                $allGrandPoints = [];
                foreach ($parentGroups as $pg) {
                    $allGrandPoints = array_merge($allGrandPoints, $pg['points']);
                }
                $grandGroups[] = [
                    'grand_name' => $grandName,
                    'parent_groups' => $parentGroups,
                    'stats' => $calcStats($allGrandPoints),
                ];
            }
            // 大块级过滤：整块没有任何掌握度数字则不显示
            $grandGroups = array_values(array_filter($grandGroups, function ($gg) {
                return (($gg['stats']['learned'] ?? 0) > 0);
            }));
            if (empty($grandGroups)) {
                continue;
            }
            usort($grandGroups, function ($a, $b) {
                $sa = $a['stats'];
                $sb = $b['stats'];
                return ($sb['learned'] <=> $sa['learned']) ?: ($sb['total'] <=> $sa['total']);
            });
            $allGreatPoints = [];
            foreach ($grandGroups as $gg) {
                foreach ($gg['parent_groups'] as $pg) {
                    $allGreatPoints = array_merge($allGreatPoints, $pg['points']);
                }
            }
            $greatGroups[] = [
                'great_name' => $greatName,
                'grand_groups' => $grandGroups,
                'stats' => $calcStats($allGreatPoints),
            ];
        }
        usort($greatGroups, function ($a, $b) {
            $sa = $a['stats'];
            $sb = $b['stats'];
            return ($sb['learned'] <=> $sa['learned']) ?: ($sb['total'] <=> $sa['total']);
        });

        // 严格参考 math.client-pc：扁平化为“grand 层卡片”（展示大块）
        foreach ($greatGroups as $great) {
            foreach (($great['grand_groups'] ?? []) as $grand) {
                $gStats = $grand['stats'] ?? ['learned' => 0, 'total' => 0];
                $clusterCards[] = [
                    'great_name' => $great['great_name'] ?? '未分组',
                    'grand_name' => $grand['grand_name'] ?? '未分组',
                    'parent_groups' => $grand['parent_groups'] ?? [],
                    'stats' => $gStats,
                ];
            }
        }
    }
    usort($clusterCards, function ($a, $b) {
        $sa = $a['stats'] ?? ['learned' => 0, 'total' => 0];
        $sb = $b['stats'] ?? ['learned' => 0, 'total' => 0];
        return (($sb['learned'] ?? 0) <=> ($sa['learned'] ?? 0))
            ?: (($sb['total'] ?? 0) <=> ($sa['total'] ?? 0));
    });
    foreach ($clusterCards as $card) {
        foreach (($card['parent_groups'] ?? []) as $pg) {
            foreach (($pg['points'] ?? []) as $p) {
                $allClusterPoints[] = $p;
            }
        }
    }
    $kpStatsTotal = [
        'total' => count($allClusterPoints),
        'mastered' => 0,
        'weak' => 0,
        'beginner' => 0,
        'unlearned' => 0,
    ];
    foreach ($allClusterPoints as $p) {
        $st = (string) ($p['status'] ?? '未学习');
        if ($st === '已掌握') {
            $kpStatsTotal['mastered']++;
        } elseif ($st === '薄弱') {
            $kpStatsTotal['weak']++;
        } elseif ($st === '未入门') {
            $kpStatsTotal['beginner']++;
        } else {
            $kpStatsTotal['unlearned']++;
        }
    }
    $moduleRowsWithStatus = array_values(array_filter($modules, function ($m) {
        $status = trim((string) ($m['status'] ?? ''));
        $masteryLevel = $m['mastery_level'] ?? null;
        if ($masteryLevel !== null) {
            return true;
        }
        return $status !== '' && ! in_array($status, ['暂无', '-', '未涉及'], true);
    }));
    $pathTagByModuleName = [];
    foreach (['keep' => '保分不错', 'boost' => '需要加强', 'key' => '优先加强'] as $bucket => $tagName) {
        foreach (($paths[$bucket] ?? []) as $item) {
            $n = trim((string) ($item['name'] ?? ''));
            if ($n === '') {
                continue;
            }
            $pathTagByModuleName[$n] = $tagName;
        }
    }
    $impactedModules = array_values(array_filter($moduleRowsWithStatus, function ($m) {
        return ((int) ($m['question_count'] ?? 0)) > 0;
    }));
    $radarModuleMap = [];
    foreach ($radar as $moduleItem) {
        $code = (string) ($moduleItem['code'] ?? '');
        if ($code !== '') {
            $radarModuleMap[$code] = $moduleItem;
        }
    }
    $moduleImpactChangeMap = [];
    foreach ($radarModuleMap as $moduleCode => $moduleItem) {
        $hitChanges = [];
        foreach (($moduleItem['children'] ?? []) as $child) {
            if (empty($child['is_hit'])) {
                continue;
            }
            $change = $child['change'] ?? null;
            if ($change === null || ! is_numeric($change)) {
                continue;
            }
            $hitChanges[] = (float) $change;
        }
        if (empty($hitChanges)) {
            continue;
        }
        $moduleImpactChangeMap[$moduleCode] = array_sum($hitChanges) / count($hitChanges);
    }
    $questionTypeLabelMap = [
        'choice' => '选择题',
        'multiple_choice' => '选择题',
        'single_choice' => '选择题',
        'select' => '选择题',
        'fill' => '填空题',
        'blank' => '填空题',
        'answer' => '解答题',
        'solution' => '解答题',
    ];
    $kpQuestionTypeMap = [];
    foreach (($questions ?? []) as $qItem) {
        $kpName = trim((string) ($qItem['knowledge_point_name'] ?? $qItem['knowledge_point'] ?? ''));
        if ($kpName === '') {
            continue;
        }
        $rawType = strtolower(trim((string) ($qItem['question_type'] ?? '')));
        $typeLabel = $questionTypeLabelMap[$rawType] ?? ((string) ($qItem['question_type'] ?? '未知题型'));
        if ($typeLabel === '') {
            $typeLabel = '未知题型';
        }
        if (! isset($kpQuestionTypeMap[$kpName])) {
            $kpQuestionTypeMap[$kpName] = [];
        }
        $kpQuestionTypeMap[$kpName][$typeLabel] = true;
    }
    $moduleKpSuggestions = [];
    foreach ($moduleRowsWithStatus as $m) {
        $moduleCode = (string) ($m['module_code'] ?? '');
        $moduleName = (string) ($m['module_name'] ?? '-');
        $moduleChildren = $radarModuleMap[$moduleCode]['children'] ?? [];
        if (! is_array($moduleChildren) || empty($moduleChildren)) {
            continue;
        }
        $started = array_values(array_filter($moduleChildren, function ($c) {
            return isset($c['mastery_level']) && $c['mastery_level'] !== null;
        }));
        usort($started, function ($a, $b) {
            $am = (float) ($a['mastery_level'] ?? 0);
            $bm = (float) ($b['mastery_level'] ?? 0);
            if ($am === $bm) {
                return strcmp((string) ($a['name'] ?? ''), (string) ($b['name'] ?? ''));
            }
            return $am <=> $bm;
        });

        $weakest = null;
        if (! empty($started)) {
            $lowestStarted = $started[0];
            $lowestStartedLevel = isset($lowestStarted['mastery_level']) ? (float) $lowestStarted['mastery_level'] : null;
            if ($lowestStartedLevel !== null && $lowestStartedLevel < 0.85) {
                // 规则1：已开始学习中掌握度最低
                $weakest = $lowestStarted;
            } else {
                // 规则2：若已开始学习均达标(>=85%)，取“最近的未学习”
                $unlearned = array_values(array_filter($moduleChildren, function ($c) {
                    return !isset($c['mastery_level']) || $c['mastery_level'] === null;
                }));
                if (! empty($unlearned)) {
                    $anchorParent = (string) ($lowestStarted['parent_name'] ?? '');
                    $anchorGrand = (string) ($lowestStarted['grand_parent_name'] ?? '');
                    usort($unlearned, function ($a, $b) use ($anchorParent, $anchorGrand) {
                        $score = function ($node) use ($anchorParent, $anchorGrand) {
                            $parent = (string) ($node['parent_name'] ?? '');
                            $grand = (string) ($node['grand_parent_name'] ?? '');
                            if ($anchorParent !== '' && $parent === $anchorParent) {
                                return 0;
                            }
                            if ($anchorGrand !== '' && $grand === $anchorGrand) {
                                return 1;
                            }
                            return 2;
                        };
                        $sa = $score($a);
                        $sb = $score($b);
                        if ($sa === $sb) {
                            return strcmp((string) ($a['name'] ?? ''), (string) ($b['name'] ?? ''));
                        }
                        return $sa <=> $sb;
                    });
                    $weakest = $unlearned[0];
                } else {
                    $weakest = $lowestStarted;
                }
            }
        } else {
            // 没有已开始学习数据时，回退到模块内任一未学习点
            $unlearned = array_values(array_filter($moduleChildren, function ($c) {
                return !isset($c['mastery_level']) || $c['mastery_level'] === null;
            }));
            if (! empty($unlearned)) {
                usort($unlearned, fn ($a, $b) => strcmp((string) ($a['name'] ?? ''), (string) ($b['name'] ?? '')));
                $weakest = $unlearned[0];
            }
        }
        if (! is_array($weakest)) {
            continue;
        }
        $kpName = (string) ($weakest['name'] ?? '');
        if ($kpName === '') {
            continue;
        }
        $types = array_keys($kpQuestionTypeMap[$kpName] ?? []);
        $moduleKpSuggestions[] = [
            'module_name' => $moduleName,
            'path_tag' => $pathTagByModuleName[$moduleName] ?? '待观察',
            'kp_name' => $kpName,
            'mastery_level' => $weakest['mastery_level'] ?? null,
            'status' => $childMasteryStatus($weakest['mastery_level'] ?? null),
            'question_types' => $types,
        ];
    }
    $moduleSuggestionByName = [];
    foreach ($moduleKpSuggestions as $sug) {
        $name = trim((string) ($sug['module_name'] ?? ''));
        if ($name !== '') {
            $moduleSuggestionByName[$name] = $sug;
        }
    }
    $kpChangeItems = array_values(array_filter($allClusterPoints, function ($p) {
        $change = $p['change'] ?? null;
        return $change !== null && is_numeric($change) && !empty($p['is_hit']);
    }));
    if (empty($kpChangeItems)) {
        $kpChangeItems = array_values(array_filter($allClusterPoints, function ($p) {
            $change = $p['change'] ?? null;
            return $change !== null && is_numeric($change);
        }));
    }
    usort($kpChangeItems, function ($a, $b) {
        return abs((float) ($b['change'] ?? 0)) <=> abs((float) ($a['change'] ?? 0));
    });
    $kpPct = function (int $count, int $total): string {
        if ($total <= 0) {
            return '0.0%';
        }
        return number_format(($count * 100.0) / $total, 1) . '%';
    };

@endphp
<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <title>学情分析报告</title>
    <link rel="stylesheet" href="/css/katex/katex.min.css">
    <style>
        @page {
            size: A4;
            margin: 2.2cm 2cm 2.3cm 2cm;
            @top-left { content: "知了数学·{{ $generateDateTime }}"; font-size: 13px; color: #666; }
            @top-center { content: "{{ $student['name'] ?? '-' }}"; font-size: 13px; color: #666; }
            @top-right {
                content: "{{ $reportCode }}";
                font-size: 19px;
                font-weight: 600;
                font-family: "Noto Sans", "Liberation Sans", "Nimbus Sans", sans-serif;
                color: #222;
            }
            @bottom-left { content: "{{ $reportCode }}"; font-size: 11px; color: #666; }
            @bottom-right { content: counter(page) "/" counter(pages); font-size: 13px; color: #666; }
        }
        * { box-sizing: border-box; }
        body { font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif; margin: 0; color: #0f172a; font-size: 13px; line-height: 1.65; }
        .page { page-break-after: auto; }
        .header { text-align: left; margin-bottom: 16px; }
        .paper-title { font-size: 30px; font-weight: 700; margin-bottom: 8px; color: #0b3a75; letter-spacing: 1px; }
        .section { margin-bottom: 14px; page-break-inside: auto; break-inside: auto; }
        .section-title { font-size: 20px; margin-bottom: 10px; font-weight: 700; color: #0b3a75; border-left: 5px solid #3b82f6; padding-left: 10px; line-height: 1.3; }
        .card { border: 1px solid #dbeafe; border-radius: 12px; padding: 14px; background: #f8fbff; position: relative; }
        .summary-list { margin: 0; padding-left: 18px; }
        .summary-list li { margin: 6px 0; font-size: 13px; }
        .overall-badge {
            position: absolute;
            right: 14px;
            top: 12px;
            border-radius: 12px;
            border: 0;
            padding: 9px 16px;
            min-width: 0;
            width: auto;
            text-align: center;
            position: absolute;
            overflow: hidden;
            display: inline-block;
            white-space: nowrap;
            background: transparent !important;
        }
        .overall-badge .level { font-size: 28px; font-weight: 800; line-height: 1.05; letter-spacing: 1px; }
        .overall-badge .score { font-size: 13px; margin-top: 3px; }
        .overall-badge.badge-s {
            border: 5px solid #6d28d9;
            border-radius: 14px;
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            content: "";
            position: absolute;
            inset: 4px;
            border: 2px dashed rgba(109, 40, 217, 0.65);
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        .overall-badge.badge-s .level {
            letter-spacing: 2px;
            text-shadow: 0 1px 0 rgba(109, 40, 217, 0.24);
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        .overall-badge.badge-excellent {
            border: 3px double #16a34a;
            border-radius: 999px;
            box-shadow: none;
        }
        .overall-badge.badge-good {
            border: 2px solid #2563eb;
            border-radius: 10px;
            clip-path: polygon(6% 0, 94% 0, 100% 50%, 94% 100%, 6% 100%, 0 50%);
            box-shadow: none;
        }
        .overall-badge.badge-average {
            border: 2px dashed #d97706;
            border-radius: 14px;
            box-shadow: none;
        }
        .overall-badge.badge-weak {
            border-left: 3px solid #ef4444;
            border-right: 0;
            border-top: 0;
            border-bottom: 2px solid #ef4444;
            border-radius: 0 10px 10px 0;
            box-shadow: none;
        }
        .overall-meta { margin-top: 8px; font-size: 9px; color: #64748b; line-height: 1.6; white-space: nowrap; }
        .radar-center { text-align: center; }
        .legend { margin-top: 8px; font-size: 12px; color: #475569; }
        .legend span { margin: 0 8px; }
        .dot { display: inline-block; width: 10px; height: 10px; border-radius: 999px; margin-right: 4px; vertical-align: middle; }
        /* PDF 版优先上下结构，避免左右分栏导致拥挤 */
        .radar-split { display: block; width: 100%; }
        .radar-left { width: 100%; text-align: center; }
        .radar-right { width: 100%; padding-left: 0; margin-top: 10px; }
        .radar-desc { border: 1px solid #dbeafe; background: #f8fbff; border-radius: 12px; padding: 12px; text-align: left; }
        .radar-item { display: block; margin: 6px 0; font-size: 12px; }
        .cluster-toolbar {
            margin-bottom: 8px;
            font-size: 12px;
            color: #475569;
        }
        .cluster-legend { display: inline-block; margin-right: 12px; }
        .cluster-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 10px;
        }
        .cluster-card {
            border: 1px solid #e2e8f0;
            border-radius: 10px;
            padding: 10px;
            background: #fff;
        }
        .cluster-card-title {
            font-size: 14px;
            font-weight: 700;
            color: #0f172a;
            margin-bottom: 8px;
        }
        .cluster-subgroup {
            border-left: 2px solid #e5e7eb;
            padding-left: 8px;
            margin-bottom: 8px;
        }
        .cluster-subgroup:last-child { margin-bottom: 0; }
        .cluster-subgroup-title {
            font-size: 12px;
            font-weight: 600;
            color: #334155;
            margin-bottom: 4px;
        }
        .cluster-points {
            display: flex;
            flex-wrap: wrap;
            gap: 4px;
        }
        .cluster-point {
            width: 10px;
            height: 10px;
            border-radius: 2px;
            display: inline-block;
            border: 1px solid rgba(148, 163, 184, 0.35);
        }
        .cluster-empty {
            font-size: 12px;
            color: #64748b;
            background: #f8fafc;
            border: 1px dashed #cbd5e1;
            border-radius: 8px;
            padding: 10px;
        }
        .kp-stats-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            border: 1px solid #e5e7eb;
            border-radius: 10px;
            overflow: hidden;
            margin-bottom: 10px;
        }
        .kp-stat-item {
            padding: 8px 10px;
            border-right: 1px solid #e5e7eb;
            background: #fff;
        }
        .kp-stat-item:last-child { border-right: none; }
        .kp-stat-label { font-size: 11px; color: #64748b; }
        .kp-stat-value { font-size: 18px; font-weight: 700; color: #111827; line-height: 1.2; margin-top: 2px; }
        .kp-stat-rate { font-size: 11px; margin-left: 4px; font-weight: 600; }
        .kp-change-box { margin-bottom: 10px; border: 1px solid #e5e7eb; border-radius: 10px; background: #f8fafc; padding: 10px 12px; }
        .kp-change-list { margin: 4px 0 0 16px; padding: 0; }
        .kp-change-list li { margin: 2px 0; color: #334155; }
        .kp-burst-card { margin-top: 10px; border: 1px solid #dbeafe; border-radius: 12px; padding: 10px; background: #fff; }
        .kp-burst-title { font-size: 13px; font-weight: 700; margin-bottom: 6px; color: #0b3a75; }
        .kp-burst-meta { font-size: 12px; color: #334155; margin-top: 6px; line-height: 1.6; }
        .kp-burst-list { margin-top: 6px; font-size: 11px; color: #334155; line-height: 1.5; }
        .kp-burst-list span { display: inline-block; margin-right: 10px; margin-bottom: 3px; }
        table { width: 100%; border-collapse: collapse; font-size: 12px; background: #fff; }
        th, td { border: 1px solid #d0d7e2; padding: 8px 10px; text-align: left; vertical-align: top; }
        th { background: #f1f5f9; color: #1e293b; font-weight: 700; }
        .badge { display: inline-block; padding: 2px 8px; border-radius: 999px; color: #fff; font-size: 11px; font-weight: 600; }
        .module-table th { background: #edf2ff; color: #0f172a; }
        .module-table th { text-align: center; }
        .module-table td { line-height: 1.45; }
        .module-table th,
        .module-table td { vertical-align: middle; }
        .module-table th:nth-child(8),
        .module-table td:nth-child(8) { vertical-align: top; }
        .module-table th:nth-child(1),
        .module-table td:nth-child(1) { text-align: center; }
        .module-table td:nth-child(2),
        .module-table td:nth-child(3),
        .module-table td:nth-child(5),
        .module-table td:nth-child(6),
        .module-table td:nth-child(7) { text-align: center; white-space: nowrap; }
        .module-table td:nth-child(8) { font-size: 11px; color: #334155; }
        .module-table tbody tr:nth-child(even) td { background: #fcfdff; }
        .module-name { font-weight: 600; color: #0f172a; }
        .impact-yes { color:#2563eb; font-weight:600; }
        .tag { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 11px; color: #334155; background: #e5e7eb; }
        .error-kp-tag { display: inline-block; margin: 0 6px 6px 0; padding: 1px 7px; border-radius: 999px; font-size: 10px; color: #334155; background: #f8fafc; border: 1px solid #d1d5db; }
        .error-kp-tag.high-risk { color: #b91c1c; border-color: #fca5a5; background: #fff; font-weight: 600; }
        .question-card { border:1px solid #e5e7eb; border-radius:8px; padding:6px 9px; margin-bottom:5px; background:#fff; page-break-inside:auto; break-inside:auto; }
        .question-block { margin-bottom: 5px; padding: 5px; border-radius: 4px; page-break-inside: auto; break-inside: auto; }
        .question-card,
        .question-card .math-content,
        .question-card .solution-content { font-size: 12px; line-height: 1.7; }
        .question-card .question-stem svg,
        .question-card .math-content svg { max-width: 100%; height: auto; display: block; shape-rendering: geometricPrecision; text-rendering: geometricPrecision; }
        .question-card .question-stem svg text {
            font-family: "Noto Serif", "Noto Serif CJK SC", "Noto Sans CJK SC", "Noto Sans", "STSongti-SC", "PingFang SC", "Songti SC", serif !important;
            font-size: 13px !important;
            font-weight: bold;
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            text-anchor: middle;
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        .question-card .question-stem svg circle,
        .question-card .question-stem svg line,
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        .question-card .question-stem svg polyline { shape-rendering: geometricPrecision; }
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            print-color-adjust: exact;
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        .question-card .question-stem .katex { font-size: 1em !important; vertical-align: 0; }
        .question-card .question-stem .katex-display { margin: 0.35em 0 !important; }
        .question-card .solution-content img,
        .question-card .report-answer-meta img {
            display: block;
            max-width: 220px;
            max-height: 60mm;
            width: auto;
            height: auto;
            margin: 6px auto;
            object-fit: contain;
            -webkit-print-color-adjust: exact;
            print-color-adjust: exact;
        }
        .solution-content {
            display: block;
            line-height: 1.75;
            white-space: normal;
            word-break: break-word;
            overflow-wrap: anywhere;
            page-break-inside: auto;
            break-inside: auto;
        }
        .report-options { margin-top: 6px; page-break-inside: auto; break-inside: auto; }
        .report-options.options-grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px 12px; }
        .report-options.options-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 20px; }
        .report-options.options-grid-1 { display: grid; grid-template-columns: 1fr; gap: 8px; }
        .report-options .option { display: flex; align-items: baseline; font-size: 12px; line-height: 1.6; page-break-inside: auto; break-inside: auto; }
        .report-options .option strong { margin-right: 4px; flex: 0 0 auto; }
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        .report-options .option-value.option-long { white-space: normal; word-break: break-word; }
        .report-options .option p, .report-options .option div { margin: 0; display: inline; }
        .report-options .option img { max-width: 100%; height: auto; vertical-align: middle; }
        .report-answer-meta { font-size: 12px; color: #2f2f2f; line-height: 1.75; margin-top: 6px; page-break-inside: auto; break-inside: auto; }
        .report-answer-meta .answer-line + .answer-line { margin-top: 4px; }
        .report-answer-meta .solution-content { display: inline; line-height: 1.75; }
        .muted { color: #6b7280; font-size: 12px; }
    </style>
</head>
<body>
<div class="page">
    <div class="header">
        <h1 class="paper-title">学情分析报告</h1>
    </div>

    <div class="section">
        <div class="section-title">一、总体评估</div>
        <div class="card">
            <div class="overall-badge {{ $overallVisual['class'] ?? '' }}"
                 style="border-color:{{ $overallVisual['border'] }}; color:{{ $overallVisual['text'] }};">
                <div class="level">{{ $overallGrade }}</div>
            </div>
            <ul class="summary-list">
                <li>本次诊断得分：
                    @if($scoreObtained !== null && $scoreTotal !== null && $scoreTotal > 0)
                        {{ rtrim(rtrim(number_format((float) $scoreObtained, 1), '0'), '.') }}/{{ rtrim(rtrim(number_format((float) $scoreTotal, 1), '0'), '.') }}
                    @else
                        暂无得分数据
                    @endif
                </li>
                <li>得分率：{{ $scoreRate !== null ? number_format((float) $scoreRate * 100, 1) . '%' : '暂无得分率' }}</li>
                <li>平均掌握度：{{ $averageMastery !== null ? number_format((float) $averageMastery * 100, 1) . '%' : '暂无掌握度' }}</li>
                <li>
                    难度匹配：
                    @if(!empty($difficultySummary['target_label']) && isset($difficultySummary['actual_average_difficulty']))
                        目标 {{ $difficultySummary['target_label'] }}
                        @if(!empty($difficultySummary['target_range']))
                            （{{ number_format((float)($difficultySummary['target_range']['min'] ?? 0), 2) }}~{{ number_format((float)($difficultySummary['target_range']['max'] ?? 0), 2) }}）
                        @endif
                        ，实际 {{ number_format((float)($difficultySummary['actual_average_difficulty'] ?? 0), 3) }}
                        （{{ $difficultySummary['status'] ?? '暂无' }}）
                    @else
                        暂无难度匹配数据
                    @endif
                </li>
                @if(!empty($difficultySummary['explain']))
                    <li>难度说明：{{ $difficultySummary['explain'] }}</li>
                @endif
                <li>
                    与历史自己对比：
                    @if(!empty($historySummary['is_first_exam']))
                        {{ $historySummary['message'] ?? '这是你的第一次分析报告，先积累样本再看趋势。' }}
                    @elseif(!empty($historySummary['low_baseline_guard']))
                        {{ $historySummary['message'] ?? '历史基线偏低，建议看连续趋势。' }}
                    @elseif(!empty($historySummary['has_data']))
                        @php
                            $trendText = (string)($historySummary['trend'] ?? '—');
                            $tVisual = $trendVisual($trendText);
                        @endphp
                        近几次均值对比：
                        {{ number_format((float)($historySummary['baseline_score_rate'] ?? 0) * 100, 1) }}%，
                        本次{{ ($historySummary['delta_score_rate'] ?? 0) >= 0 ? '提升' : '回落' }}
                        {{ number_format(abs((float)($historySummary['delta_score_rate'] ?? 0)) * 100, 1) }}%
                        （<span style="color:{{ $tVisual['color'] ?? '#64748b' }}; font-weight:600;">{{ $tVisual['icon'] ?? '•' }} {{ $trendText }}</span>）
                    @else
                        {{ $historySummary['message'] ?? '历史样本不足' }}
                    @endif
                </li>
                @if(!empty($peerSummary['show_line']))
                    <li>
                        与同群体对比：
                        {{ $peerSummary['message'] ?? '' }}
                        （<span style="color:{{ $peerSummary['band_color'] ?? '#64748b' }}; font-weight:600;">{{ $peerSummary['band_icon'] ?? '•' }} {{ $peerSummary['band'] ?? '—' }}</span>）
                    </li>
                @endif
                <li>
                    整体水平：
                    @if($overallScore !== null)
                        {{ number_format($overallScore, 1) }} 分（{{ $overallGrade }}）
                    @else
                        待计算
                    @endif
                </li>
            </ul>
            <div class="overall-meta">
                规则：综合分 = 当前50% + 历史25% + 同群体25% + 难度校正，即：(({{ number_format($scoreRate !== null ? (float)$scoreRate * 100 : 0, 1) }}×70% + {{ number_format($averageMastery !== null ? (float)$averageMastery * 100 : 0, 1) }}×30%)×50%) + {{ number_format($historyPart, 1) }}×25% + {{ number_format($peerPart, 1) }}×25% + {{ number_format($adjustPart, 1) }} = {{ number_format($overallScore ?? $compositeFormulaResult, 1) }}
            </div>
        </div>
    </div>

    <div class="section">
        <div class="section-title">二、知识点掌握聚类视图</div>
        <div class="cluster-toolbar">
            <span class="cluster-legend"><i class="dot" style="background:#52c41a"></i>已掌握</span>
            <span class="cluster-legend"><i class="dot" style="background:#faad14"></i>薄弱</span>
            <span class="cluster-legend"><i class="dot" style="background:#f5222d"></i>未入门</span>
            <span class="cluster-legend"><i class="dot" style="background:#d9d9d9"></i>未学习</span>
            <span>按“模块 → 子模块 → 知识点”聚类展示</span>
        </div>
        <div class="cluster-grid">
            @foreach($clusterCards as $cluster)
                <div class="cluster-card">
                    <div class="cluster-card-title">
                        {{ $cluster['grand_name'] }}
                    </div>
                    @if(!empty($cluster['parent_groups']))
                        @foreach($cluster['parent_groups'] as $parent)
                            <div class="cluster-subgroup">
                                <div class="cluster-subgroup-title">{{ $parent['parent_name'] }}</div>
                                <div class="cluster-points">
                                    @foreach($parent['points'] as $point)
                                        <span class="cluster-point"
                                              style="background:{{ $point['color'] }}"
                                              title="{{ $point['name'] }} · {{ $point['status'] }}{{ $point['mastery_level'] !== null ? '（' . number_format((float)$point['mastery_level'] * 100, 1) . '%）' : '' }}{{ $point['path'] !== '' ? ' · ' . $point['path'] : '' }}"></span>
                                    @endforeach
                                </div>
                            </div>
                        @endforeach
                    @else
                        <div class="cluster-empty">当前模块暂无可展示的子知识点。</div>
                    @endif
                </div>
            @endforeach
        </div>
        <div style="margin-top:10px;">
            <div class="kp-stats-grid">
                <div class="kp-stat-item">
                    <div class="kp-stat-label">总知识点数</div>
                    <div class="kp-stat-value">{{ $kpStatsTotal['total'] }}</div>
                </div>
                <div class="kp-stat-item">
                    <div class="kp-stat-label">已掌握</div>
                    <div class="kp-stat-value" style="color:#52c41a;">
                        {{ $kpStatsTotal['mastered'] }}<span class="kp-stat-rate" style="color:#52c41a;">({{ $kpPct($kpStatsTotal['mastered'], $kpStatsTotal['total']) }})</span>
                    </div>
                </div>
                <div class="kp-stat-item">
                    <div class="kp-stat-label">薄弱</div>
                    <div class="kp-stat-value" style="color:#faad14;">
                        {{ $kpStatsTotal['weak'] }}<span class="kp-stat-rate" style="color:#faad14;">({{ $kpPct($kpStatsTotal['weak'], $kpStatsTotal['total']) }})</span>
                    </div>
                </div>
                <div class="kp-stat-item">
                    <div class="kp-stat-label">未入门</div>
                    <div class="kp-stat-value" style="color:#f5222d;">
                        {{ $kpStatsTotal['beginner'] }}<span class="kp-stat-rate" style="color:#f5222d;">({{ $kpPct($kpStatsTotal['beginner'], $kpStatsTotal['total']) }})</span>
                    </div>
                </div>
                <div class="kp-stat-item">
                    <div class="kp-stat-label">未学习</div>
                    <div class="kp-stat-value" style="color:#9ca3af;">
                        {{ $kpStatsTotal['unlearned'] }}<span class="kp-stat-rate" style="color:#9ca3af;">({{ $kpPct($kpStatsTotal['unlearned'], $kpStatsTotal['total']) }})</span>
                    </div>
                </div>
            </div>
        </div>
    </div>

    <div class="section">
        <div class="section-title">三、模块现状与提分路径（全局+本学案影响）</div>
        <div class="kp-change-box">
            <div style="font-size:12px;font-weight:700;color:#0f172a;">本学案知识点变化情况</div>
            @if(!empty($kpChangeItems))
                <ul class="kp-change-list">
                    @foreach($kpChangeItems as $item)
                        @php
                            $delta = (float) ($item['change'] ?? 0);
                            $deltaText = ($delta >= 0 ? '+' : '') . number_format($delta * 100, 1) . '%';
                            $deltaColor = $delta > 0 ? '#16a34a' : ($delta < 0 ? '#dc2626' : '#64748b');
                            $masteryText = isset($item['mastery_level']) && $item['mastery_level'] !== null
                                ? number_format((float) $item['mastery_level'] * 100, 1) . '%'
                                : '--';
                        @endphp
                        <li>
                            {{ $item['name'] ?? '-' }}：
                            <span style="color:{{ $deltaColor }};font-weight:600;">{{ $deltaText }}</span>
                            （掌握度{{ $masteryText }}，{{ $item['status'] ?? '未学习' }}）
                        </li>
                    @endforeach
                </ul>
            @else
                <div class="muted" style="margin-top:4px;">暂无可用的知识点变化数据</div>
            @endif
        </div>
        <div style="margin-bottom:8px; padding:8px 10px; border:1px solid #e5e7eb; border-radius:8px; background:#fff;">
            <div style="font-size:12px;color:#334155;">
                本次学案影响模块：
                @if(!empty($impactedModules))
                    @foreach($impactedModules as $idx => $im)
                        @php $mName = $im['module_name'] ?? '-'; @endphp
                        <span style="display:inline-block;padding:2px 8px;border-radius:999px;background:#eef2ff;color:#3730a3;margin-right:4px;">
                            {{ $mName }}（{{ $im['question_count'] ?? 0 }}题）
                        </span>
                    @endforeach
                @else
                    <span class="muted">暂无命中模块</span>
                @endif
            </div>
        </div>
        <table class="module-table">
            <thead>
            <tr>
                <th style="width: 14%;">模块</th>
                <th style="width: 10%; white-space: nowrap;">本次影响</th>
                <th style="width: 18%;">掌握度<br>（学案影响）</th>
                <th style="width: 12%;">掌握状态</th>
                <th style="width: 9%;">题目数</th>
                <th style="width: 11%;">得分率</th>
                <th style="width: 11%;">路径建议</th>
                <th style="width: 25%;">关注知识点</th>
            </tr>
            </thead>
            <tbody>
            @forelse($moduleRowsWithStatus as $m)
                @php
                    $status = (string) ($m['status'] ?? '暂无');
                    $color = $statusColor($status);
                    $rate = $m['exam_score_rate'] ?? null;
                    $qCount = (int) ($m['question_count'] ?? 0);
                    $isImpacted = $qCount > 0;
                    $pathTag = $pathTagByModuleName[(string) ($m['module_name'] ?? '')] ?? '待观察';
                    $pathColor = match ($pathTag) {
                        '优先加强' => '#ef4444',
                        '需要加强' => '#f59e0b',
                        '保分不错' => '#16a34a',
                        default => '#64748b',
                    };
                    $moduleCode = (string) ($m['module_code'] ?? '');
                    $impactDelta = $moduleImpactChangeMap[$moduleCode] ?? null;
                    $impactArrow = $impactDelta === null
                        ? ''
                        : ($impactDelta > 0.0005 ? '↑' : ($impactDelta < -0.0005 ? '↓' : '→'));
                    $impactColor = $impactDelta === null
                        ? '#64748b'
                        : ($impactDelta > 0.0005 ? '#16a34a' : ($impactDelta < -0.0005 ? '#dc2626' : '#64748b'));
                    $impactText = $impactDelta === null ? '' : number_format(abs($impactDelta) * 100, 1) . '%';
                    $impactSuffix = $impactArrow === '→' ? '' : $impactText;
                    $moduleName = (string) ($m['module_name'] ?? '');
                    $focus = $moduleSuggestionByName[$moduleName] ?? null;
                    $focusText = '-';
                    if (is_array($focus)) {
                        $focusName = (string) ($focus['kp_name'] ?? '');
                        $focusTypes = !empty($focus['question_types']) ? implode('、', $focus['question_types']) : '';
                        $focusMastery = isset($focus['mastery_level']) && $focus['mastery_level'] !== null
                            ? number_format((float) $focus['mastery_level'] * 100, 1) . '%'
                            : '--';
                        $focusSuffix = $focusTypes !== '' ? ('，' . $focusTypes) : '';
                        $focusText = $focusName !== ''
                            ? ($focusName . '（' . $focusMastery . $focusSuffix . '）')
                            : '-';
                    }
                @endphp
                <tr>
                    <td><span class="module-name">{{ $m['module_name'] ?? '-' }}</span></td>
                    <td>
                        @if($isImpacted)
                            <span class="impact-yes">是</span>
                        @else
                            <span class="muted">否</span>
                        @endif
                    </td>
                    <td>
                        {{ isset($m['mastery_level']) && $m['mastery_level'] !== null ? number_format((float) $m['mastery_level'] * 100, 1) . '%' : '-' }}
                        @if($impactArrow !== '')
                            <span style="margin-left:4px;color:{{ $impactColor }};font-weight:700;">
                                {{ $impactArrow }}{{ $impactSuffix }}
                            </span>
                        @endif
                    </td>
                    <td><span class="badge" style="background:{{ $color }}">{{ $status }}</span></td>
                    <td>{{ $m['question_count'] ?? 0 }}</td>
                    <td>{{ $rate !== null ? number_format((float) $rate * 100, 1) . '%' : '-' }}</td>
                    <td><span style="color:{{ $pathColor }}; font-weight:700;">{{ $pathTag }}</span></td>
                    <td>{{ $focusText }}</td>
                </tr>
            @empty
                <tr>
                    <td colspan="8" class="muted">暂无掌握状态数据</td>
                </tr>
            @endforelse
            </tbody>
        </table>
    </div>

    @if(!empty($wrongQuestions))
        <div class="section" style="page-break-inside:auto; break-inside:auto;">
            <div class="section-title">四、这次错题记录</div>
            @if(!empty($kpWrongStats))
                <div style="margin-bottom:8px; padding:8px; border:1px solid #e5e7eb; border-radius:6px; background:#f8fafc;">
                    <div style="font-size:12px; font-weight:600; margin-bottom:6px;">知识点错误率</div>
                    <div style="font-size:12px; color:#475569; line-height:1.7;">
                        @foreach($kpWrongStats as $item)
                            <span class="error-kp-tag {{ $item['rate'] > 0.5 ? 'high-risk' : '' }}">{{ $item['kp_name'] }}：{{ $item['wrong'] }}/{{ $item['total'] }}（{{ number_format($item['rate'] * 100, 1) }}%）</span>
                        @endforeach
                    </div>
                </div>
            @endif

            @foreach($wrongQuestions as $q)
                @php
                    $studentAnswer = $q['student_answer'] ?? null;
                    $correctAnswer = $q['answer'] ?? $q['correct_answer'] ?? null;
                    $isCorrect = $q['is_correct'] ?? null;
                    if ($isCorrect === null && !empty($studentAnswer) && !empty($correctAnswer)) {
                        $isCorrect = (trim($studentAnswer) === trim($correctAnswer)) ? 1 : 0;
                    }

                    $statusText = '';
                    $statusColorValue = '';
                    if ($isCorrect === 1) {
                        $statusText = '正确';
                        $statusColorValue = '#10b981';
                    } elseif ($isCorrect === 0) {
                        $statusText = '错误';
                        $statusColorValue = '#ef4444';
                    }
                    $showStatus = $statusText !== '';

                    $insight = $insightMap[$q['question_number']] ?? ($insightMap[$q['display_number'] ?? null] ?? []);
                    $fullScore = $insight['full_score'] ?? ($q['score'] ?? null);
                    if ($isCorrect === 1) {
                        $score = $fullScore;
                    } elseif ($isCorrect === 0) {
                        $score = $q['score_obtained'] ?? 0;
                    } else {
                        $score = null;
                    }
                    $analysisRaw = $insight['analysis']
                        ?? $insight['thinking_process']
                        ?? $insight['feedback']
                        ?? $insight['suggestions']
                        ?? $insight['reason']
                        ?? ($insight['correct_solution'] ?? null);
                    if (empty($analysisRaw) && !empty($insight['next_steps'])) {
                        $analysisRaw = '后续建议：' . (is_array($insight['next_steps']) ? implode('；', $insight['next_steps']) : $insight['next_steps']);
                    }
                    $analysis = is_array($analysisRaw) ? json_encode($analysisRaw, JSON_UNESCAPED_UNICODE) : $analysisRaw;
                    if ($analysis === null || $analysis === '') {
                        $analysis = '暂无解题思路，待补充';
                    }
                    if (is_string($analysis)) {
                        $analysis = preg_replace('/^【?\s*解题思路\s*】?\s*[:：]?\s*/u', '', $analysis);
                    }
                    $formatSolutionLikeGrading = function ($text) {
                        if (!is_string($text) || trim($text) === '') {
                            return $text;
                        }
                        $normalized = preg_replace('/\s*；\s*步骤\s*(\d+)/u', "；\n步骤$1", $text);
                        $normalized = preg_replace('/\s*。\s*步骤\s*(\d+)/u', "。\n步骤$1", $normalized);
                        $normalized = preg_replace('/(?<!^)(步骤\s*\d+\s*[:：])/u', "\n$1", $normalized);
                        $normalized = preg_replace('/(?<!^)(第\s*\d+\s*步\s*[:：]?)/u', "\n$1", $normalized);
                        $normalized = preg_replace('/\n{3,}/u', "\n\n", $normalized);
                        $normalized = preg_replace('/^[\h\x{3000}]+/mu', '', $normalized);
                        return trim($normalized);
                    };
                    $stepsRaw = $insight['steps'] ?? $insight['solution_steps'] ?? $insight['analysis_steps'] ?? null;
                    $steps = [];
                    if (is_array($stepsRaw)) {
                        $steps = $stepsRaw;
                    } elseif (is_string($stepsRaw) && trim($stepsRaw) !== '') {
                        $steps = preg_split('/[\r\n]+/', trim($stepsRaw));
                    }
                    $typeMap = ['choice' => '选择题', 'fill' => '填空题', 'answer' => '解答题'];
                    $typeLabel = $typeMap[$q['question_type'] ?? ''] ?? ($q['question_type'] ?? '题型未标注');
                    $questionText = is_string($q['question_text']) ? $q['question_text'] : json_encode($q['question_text'], JSON_UNESCAPED_UNICODE);
                    $solution = $q['solution'] ?? null;
                    if (is_string($solution)) {
                        $solution = preg_replace('/^【?\s*解题思路\s*】?\s*[:：]?\s*/u', '', $solution);
                    }
                    $solution = $formatSolutionLikeGrading($solution);
                    $analysis = $formatSolutionLikeGrading($analysis);
                    $renderLikeGrading = function ($text) {
                        if (is_array($text)) {
                            $text = json_encode($text, JSON_UNESCAPED_UNICODE);
                        }
                        $text = is_string($text) ? trim($text) : '';
                        if ($text === '') {
                            return '';
                        }
                        // 兼容题库里常见的转义写法：\$x\$、\$\frac{...}\$
                        $text = preg_replace('/\\\\\\$/u', '$', $text);
                        return \App\Services\MathFormulaProcessor::processFormulas($text);
                    };
                    $questionTextRendered = $renderLikeGrading($questionText);
                    $displayCorrectAnswer = is_array($correctAnswer) ? json_encode($correctAnswer, JSON_UNESCAPED_UNICODE) : (string) $correctAnswer;
                    $questionTypeRaw = strtolower(trim((string) ($q['question_type'] ?? '')));
                    $isChoiceQuestion = in_array($questionTypeRaw, ['choice', 'multiple_choice', 'single_choice', '选择题', 'select'], true);
                    $normalizedOptions = [];
                    $correctAnswerLetters = [];
                    if ($isChoiceQuestion) {
                        $rawOptions = $q['options'] ?? [];
                        if (is_string($rawOptions)) {
                            $decodedOptions = json_decode($rawOptions, true);
                            $rawOptions = is_array($decodedOptions) ? $decodedOptions : [];
                        }
                        if (is_array($rawOptions)) {
                            foreach ($rawOptions as $optKey => $optValue) {
                                $letter = null;
                                if (is_string($optKey) && preg_match('/([A-H])/i', $optKey, $m)) {
                                    $letter = strtoupper($m[1]);
                                } elseif (is_array($optValue)) {
                                    $candidate = $optValue['label'] ?? $optValue['key'] ?? $optValue['option'] ?? null;
                                    if (is_string($candidate) && preg_match('/([A-H])/i', $candidate, $m)) {
                                        $letter = strtoupper($m[1]);
                                    }
                                }
                                if ($letter === null) {
                                    continue;
                                }
                                $content = is_array($optValue) ? ($optValue['content'] ?? $optValue['text'] ?? $optValue['value'] ?? '') : $optValue;
                                if (!is_string($content)) {
                                    $content = json_encode($content, JSON_UNESCAPED_UNICODE);
                                }
                                $content = trim((string) $content);
                                if ($content !== '') {
                                    $normalizedOptions[$letter] = $content;
                                }
                            }
                        }
                        if (trim((string) $correctAnswer) !== '') {
                            preg_match_all('/[A-H]/i', strtoupper((string) $correctAnswer), $answerMatches);
                            $correctAnswerLetters = array_values(array_unique($answerMatches[0] ?? []));
                        }
                        if (!empty($normalizedOptions) && !empty($correctAnswerLetters)) {
                            $mappedAnswers = [];
                            foreach ($correctAnswerLetters as $letter) {
                                if (isset($normalizedOptions[$letter])) {
                                    $mappedAnswers[] = $letter . '. ' . $normalizedOptions[$letter];
                                }
                            }
                            if (!empty($mappedAnswers)) {
                                $displayCorrectAnswer = implode('；', $mappedAnswers);
                            }
                        }
                    }
                    $choiceOptionLetters = !empty($normalizedOptions) ? array_keys($normalizedOptions) : [];
                    sort($choiceOptionLetters);
                    $choiceLayoutClass = 'options-grid-1';
                    $layoutDecider = app(\App\Support\OptionLayoutDecider::class);
                    if (! empty($normalizedOptions) && ! empty($choiceOptionLetters)) {
                        $optValuesForLayout = [];
                        foreach ($choiceOptionLetters as $L) {
                            $optValuesForLayout[] = $normalizedOptions[$L];
                        }
                        $layoutMeta = $layoutDecider->decide($optValuesForLayout, 'grading');
                        $choiceLayoutClass = $layoutMeta['class'] ?? 'options-grid-1';
                    }
                @endphp
                <div class="question-card">
                    <div style="display:flex; justify-content:space-between; align-items:center; gap:8px; margin-bottom:4px;">
                        <div style="display:flex; align-items:center; gap:8px; font-weight:600;">
                            <span class="tag">题号 {{ $q['display_number'] ?? $q['question_number'] }} · {{ $typeLabel }}</span>
                            @php
                                $kpName = $q['knowledge_point_name'] ?? $q['knowledge_point'] ?? null;
                                if (!empty($kpName) && $kpName !== '-' && $kpName !== '未标注') {
                                    echo '<span class="tag" style="background: #eef2ff; color:#4338ca;">' . e($kpName) . '</span>';
                                }
                            @endphp
                            @if($showStatus)
                                <span class="tag" style="background: {{ $statusColorValue }}; color:#fff;">{{ $statusText }}</span>
                            @endif
                        </div>
                        @if($score !== null && $fullScore !== null)
                            <div class="muted">得分 {{ $score }} / {{ $fullScore }}</div>
                        @endif
                    </div>

                    <div class="question-stem math-content" style="margin-bottom:6px;">{!! $questionTextRendered !!}</div>

                    @if(!empty($isChoiceQuestion) && !empty($normalizedOptions))
                        <div class="report-options {{ $choiceLayoutClass }}">
                            @foreach($choiceOptionLetters as $optLetter)
                                @php
                                    $isCorrectOpt = in_array($optLetter, $correctAnswerLetters ?? [], true);
                                    $rawOpt = (string) ($normalizedOptions[$optLetter] ?? '');
                                    $normalizedOpt = str_replace('\\dfrac', '\\frac', $rawOpt);
                                    $normalizedOpt = str_replace('\\displaystyle', '', $normalizedOpt);
                                    $normalizedOpt = $layoutDecider->normalizeCompactMathForDisplay($normalizedOpt);
                                    $rawOptPlain = html_entity_decode(strip_tags($rawOpt), ENT_QUOTES | ENT_HTML5, 'UTF-8');
                                    $rawOptPlain = preg_replace('/\s+/u', '', $rawOptPlain ?? '');
                                    $isShortOption = mb_strlen((string) $rawOptPlain, 'UTF-8') <= 8;
                                    $valClass = $isShortOption ? 'option-short' : 'option-long';
                                    $renderedOpt = $renderLikeGrading($normalizedOpt);
                                @endphp
                                <div class="option option-compact">
                                    <strong>{{ $optLetter }}.</strong>
                                    <span class="option-value {{ $valClass }}">{!! $renderedOpt !!}</span>
                                    @if($isCorrectOpt)
                                        <span style="margin-left:4px; font-size:13px; color:#15803d; font-weight:700;">✅</span>
                                    @endif
                                </div>
                            @endforeach
                        </div>
                    @endif

                    @if(!empty($correctAnswer) && (!$isChoiceQuestion || empty($normalizedOptions)))
                        <div class="question-block" style="background:#f0fdf4; border-left:3px solid #10b981;">
                            <div style="font-weight:600; font-size:12px; color:#111827; margin-bottom:3px;">正确答案</div>
                            <div class="math-content" style="line-height:1.7; color:#374151;">
                                {!! $renderLikeGrading($displayCorrectAnswer) !!}
                            </div>
                        </div>
                    @endif

                    @if(!empty($solution))
                        <div class="report-answer-meta">
                            <div class="answer-line">
                                <strong>解题思路：</strong>
                                <span class="solution-content">{!! $renderLikeGrading($solution) !!}</span>
                            </div>
                        </div>
                    @elseif(!empty($analysis) && $analysis !== '暂无解题思路记录')
                        <div class="report-answer-meta">
                            <div class="answer-line">
                                <strong>解题思路：</strong>
                                <span class="solution-content">{!! $renderLikeGrading($analysis) !!}</span>
                            </div>
                        </div>
                    @endif

                    @if(!empty($steps))
                        <div style="margin-top:6px; font-size:12px;">
                            <div style="font-weight:600; margin-bottom:3px;">解题步骤</div>
                            <ol style="margin:0; padding-left:18px;">
                                @foreach($steps as $s)
                                    @php
                                        $stepText = is_array($s) ? json_encode($s, JSON_UNESCAPED_UNICODE) : (string) $s;
                                    @endphp
                                    <li style="margin-bottom:2px;">{!! nl2br($renderLikeGrading($stepText)) !!}</li>
                                @endforeach
                            </ol>
                        </div>
                    @endif
                </div>
            @endforeach
        </div>
    @endif
</div>
<script src="/js/katex.min.js"></script>
<script src="/js/auto-render.min.js"></script>
<script>
    document.addEventListener('DOMContentLoaded', function() {
        try {
            renderMathInElement(document.body, {
                delimiters: [
                    {left: "$$", right: "$$", display: true},
                    {left: "$", right: "$", display: false},
                    {left: "\\(", right: "\\)", display: false},
                    {left: "\\[", right: "\\]", display: true}
                ],
                throwOnError: false,
                strict: false,
                trust: true
            });
        } catch (e) {}
    });
</script>
</body>
</html>