gwd
/
math_cms


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <title>数学知识点讲解</title>
    <link rel="stylesheet" href="/css/katex/katex.min.css">
    @include('pdf.partials.kp-explain-styles')
    <style>
        :root {
            --pdf-space-xxs: 2px;
            --pdf-space-xs: 4px;
            --pdf-space-sm: 6px;
            --pdf-space-md: 10px;

            --pdf-border-light: #d8d8d8;
            --pdf-border-strong: #777;

            --pdf-text-primary: #000;
            --pdf-text-secondary: #555;

            --pdf-radius-soft: 2px;

            --pdf-line-normal: 1.75;
            --pdf-line-relaxed: 1.9;
        }

        /* 与 exam-paper 一致：题干网格、选项网格、判卷答案区基础样式 */
        @include('pdf.partials.paper-body-core-styles')
        .case-list .option-compact { line-height: inherit; }
        .case-list .option .katex {
            font-size: 1em !important;
            vertical-align: 0;
        }
        .case-list .option .katex .mfrac {
            font-size: 1em !important;
        }
        .case-list .option .katex .mfrac .mtight {
            font-size: 1em !important;
        }
        .case-list .option .katex .frac-line {
            border-bottom-width: 0.055em !important;
        }
        .case-list .option .katex .mfrac .vlist > span:nth-child(1) {
            transform: translateY(0.24em) !important;
        }
        .case-list .option .katex .mfrac .vlist > span:nth-child(3) {
            transform: translateY(-0.16em) !important;
        }
        .case-list .option .katex-display {
            display: inline;
            margin: 0 !important;
            vertical-align: baseline;
        }
        .case-list .answer-meta {
            font-size: 12px;
            color: #2f2f2f;
            line-height: var(--pdf-line-normal);
            margin-top: var(--pdf-space-xs);
            page-break-inside: auto;
            break-inside: auto;
        }
        .case-list .answer-line + .answer-line { margin-top: var(--pdf-space-xs); }
        .case-list .solution-content { display: inline-block; line-height: var(--pdf-line-normal); }

        /* ========== 案例区整体 ========== */
        .case-list { margin-top: 14px; }
        .case-list .case-item {
            margin: 10px 0 14px;
            padding: 8px var(--pdf-space-md);
            border: none;
            border-left: 1.5px solid var(--pdf-border-light);
            border-radius: var(--pdf-radius-soft);
            background: #fff;
            line-height: var(--pdf-line-normal);
            break-inside: auto;
            page-break-inside: auto;
            orphans: 2;
            widows: 2;
        }
        .case-list .case-item + .case-item { margin-top: 9px; }

        /* ========== 题干区域 ========== */
        .case-list .kp-case-row {
            font-size: 14.5px;
            line-height: 1.8;
            margin-bottom: 3px;
            break-inside: auto;
            page-break-inside: auto;
            break-after: auto;
            page-break-after: auto;
            orphans: 2;
            widows: 2;
        }
        .case-list .kp-case-head-inline {
            display: inline;
        }
        .case-list .kp-case-prefix {
            font-weight: 700;
            white-space: nowrap;
        }
        .case-list .kp-case-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--pdf-text-primary);
            margin-right: var(--pdf-space-xxs);
            white-space: nowrap;
        }
        .case-list .kp-case-source {
            font-size: 13px;
            color: var(--pdf-text-secondary);
            margin-right: 3px;
            font-weight: 700;
        }
        .case-list .kp-case-head-content {
            display: inline;
        }
        .case-list .kp-case-stem {
            font-size: 14.5px;
            font-weight: 400;
            line-height: 1.85;
            word-break: normal;
            overflow-wrap: break-word;
            break-inside: auto;
            page-break-inside: auto;
            orphans: 2;
            widows: 2;
        }

        /* ========== 解析区 ========== */
        .case-list .kp-case-meta-block { margin-top: 3px; line-height: 1.85; }
        .case-list .kp-case-meta-row {
            margin-top: 3px;
            text-indent: 0;
            page-break-inside: auto;
            break-inside: auto;
        }
        .case-list .kp-case-content {
            display: block;
            font-size: 14px;
            line-height: var(--pdf-line-relaxed);
            color: #222;
            white-space: normal;
            word-break: break-word;
            overflow-wrap: anywhere;
            orphans: 2;
            widows: 2;
        }
        .case-list .kp-case-answer-row {
            margin: var(--pdf-space-xs) 0 var(--pdf-space-sm);
            padding: 3px var(--pdf-space-sm);
            background: #f6f6f6;
            border-radius: var(--pdf-radius-soft);
        }
        .case-list .kp-case-solution-row .solution-content {
            display: block;
            margin-top: 2px;
        }
        /* 仅提升案例区 display 公式呼吸感，不动全局 KaTeX 行高 */
        .case-list .kp-case-content .katex-display,
        .case-list .kp-case-stem .katex-display {
            margin-top: 0.45em !important;
            margin-bottom: 0.5em !important;
        }
        .case-list .kp-case-content .complex-display-math,
        .case-list .kp-case-stem .complex-display-math {
            margin-top: 0.6em !important;
            margin-bottom: 0.65em !important;
        }

        /* ========== 小标题 ========== */
        .case-list .case-subtitle {
            display: block;
            font-weight: 700;
            font-size: 14px;
            margin-top: 8px;
            margin-bottom: var(--pdf-space-xxs);
            padding-left: 5px;
            border-left: 2px solid var(--pdf-border-strong);
            line-height: 1.35;
            color: var(--pdf-text-primary);
            break-after: avoid;
            page-break-after: avoid;
        }
        /* 标题+首段语义绑定：只对真正短小的纯文本节 avoid；含图/大公式自动分页，减少大面积空白 */
        .case-list .case-section {
            margin-top: var(--pdf-space-xs);
            break-inside: auto;
            page-break-inside: auto;
        }
        .case-list .case-section + .case-section { margin-top: 5px; }
        .case-list .case-section.case-section-keep {
            break-inside: avoid;
            page-break-inside: avoid;
        }
        .case-list .case-section.case-section-long {
            break-inside: auto;
            page-break-inside: auto;
        }
        .case-list .case-section-content { margin-top: 1px; }

        /* ========== 分页控制 ========== */
        .case-list .case-analysis {
            break-inside: auto;
            page-break-inside: auto;
        }
        .case-list .case-detail {
            break-inside: auto;
            page-break-inside: auto;
        }

        /* ========== 多小题 ========== */
        .case-list .sub-question {
            display: block;
            margin: 4px 0;
            padding-left: 2em;
            text-indent: -2em;
            line-height: 1.8;
        }

        /* 图片：与 exam-paper / 判卷一致 */
        @include('pdf.partials.paper-exam-shared-image-styles')
        /* 案例区优先节省纸张：不要让图和后续小题/答案强绑定到下一页 */
        .case-list .pdf-figure {
            break-inside: auto !important;
            page-break-inside: auto !important;
            -webkit-column-break-inside: auto !important;
            break-before: auto !important;
            break-after: auto !important;
            page-break-before: auto !important;
            page-break-after: auto !important;
            margin: 4px 0 !important;
            min-height: 0 !important;
            max-height: none !important;
        }
        .case-list .pdf-figure img,
        .case-list .kp-case-stem img {
            margin-top: 4px !important;
            margin-bottom: 4px !important;
            max-height: 48mm !important;
        }
    </style>
</head>
<body>
<div class="page">
    <div class="kp-explain-header">
        <div class="kp-explain-title">数学知识点讲解</div>
        <div class="kp-explain-subtitle">围绕目标知识点生成讲解与案例，帮助学生高效复习。</div>
    </div>

    {{-- 知识点正文：与 pdf.exam-knowledge-explanation（知识点组卷前置梳理）同一套容器与数据（buildExplanations + normalizeKpExplanation） --}}
    @if(empty($knowledgePoints))
        <div class="kp-empty">暂无知识点数据</div>
    @else
        <div class="kp-list">
    @foreach($knowledgePoints as $point)
        <div class="kp-section">
            <div class="kp-section-head">
                <div class="kp-section-name">{{ $loop->iteration }}、{{ $point['kp_name'] ?? ($point['kp_code'] ?? '未命名知识点') }}</div>
            </div>
            <div class="kp-section-body">
                @if(!empty($point['explanation']))
                    {!! $point['explanation'] !!}
                @endif
            </div>

            @if(!empty($point['cases']))
                @php
                    // 与卷子题干一致的小题号断行逻辑（仅在至少2个小题编号时生效）
                    $formatStemLikePaper = function (?string $text): string {
                        $stem = trim((string) $text);
                        if ($stem === '') {
                            return '—';
                        }
                        preg_match_all('/[（(][1-9][0-9]*[）)]/u', $stem, $subQuestionMatches);
                        $subQuestionCount = count($subQuestionMatches[0] ?? []);
                        if ($subQuestionCount >= 2) {
                            $stem = preg_replace('/^\s*([（(][1-9][0-9]*[）)])\s*/u', '$1 ', $stem) ?? $stem;
                            // 断行后保留两个中文空格缩进
                            $stem = preg_replace('/([。；;！？!?:：.])\s*([（(][1-9][0-9]*[）)])\s*/u', '$1<br>　　$2 ', $stem) ?? $stem;
                            $stem = preg_replace('/(?:(?:\\\\r\\\\n|\\\\n)|(?:\r?\n)|(?:<br\s*\/?>)|\s)+\s*([（(][1-9][0-9]*[）)])\s*/u', '<br>　　$1 ', $stem) ?? $stem;
                            $stem = preg_replace('/(求出|求解|求|写出|计算|证明|判断|化简)\s*([（(][1-9][0-9]*[）)])\s*/u', '$1<br>　　$2 ', $stem) ?? $stem;
                        }
                        return $stem;
                    };

                    $markComplexDisplayMath = function (string $html): string {
                        return preg_replace_callback(
                            '/<span\b([^>]*\bclass="[^"]*\bkatex-display\b[^"]*"[^>]*)>(.*?)<\/span>/isu',
                            static function (array $matches): string {
                                $attrs = $matches[1] ?? '';
                                $content = $matches[2] ?? '';
                                $isComplex = str_contains($content, 'mfrac') || str_contains($content, 'vlist');
                                if (!$isComplex || str_contains($attrs, 'complex-display-math')) {
                                    return $matches[0];
                                }

                                $attrs = preg_replace('/\bclass="([^"]*)"/u', 'class="$1 complex-display-math"', $attrs, 1) ?? $attrs;

                                return '<span' . $attrs . '>' . $content . '</span>';
                            },
                            $html
                        ) ?? $html;
                    };

                    // 解析：移除“讲解/解析”前缀，结构化分析/详解小标题，并保守处理步骤换行
                    $formatSolution = function (?string $text) use ($markComplexDisplayMath): string {
                        $solution = trim((string) $text);
                        if ($solution === '') {
                            return '—';
                        }
                        $solution = preg_replace('/^\s*[【\[]?\s*(讲解|解析)\s*[】\]]?\s*[:：]\s*/u', '', $solution) ?? $solution;
                        $solution = preg_replace('/\s*【\s*(分析|详解|点睛)\s*】\s*/u', '<div class="case-subtitle">$1</div>', $solution) ?? $solution;
                        $solution = preg_replace('/\s*\[\s*(分析|详解|点睛)\s*\]\s*/u', '<div class="case-subtitle">$1</div>', $solution) ?? $solution;
                        $solution = preg_replace('/\s*(步骤\s*[0-9一二三四五六七八九十百零两]+\s*[：:]?)/u', '<br>$1', $solution) ?? $solution;
                        $solution = preg_replace('/\s*(第\s*[0-9一二三四五六七八九十百零两]+\s*步\s*[：:]?)/u', '<br>$1', $solution) ?? $solution;
                        $plainLength = mb_strlen(strip_tags($solution), 'UTF-8');
                        if ($plainLength > 160) {
                            $solution = preg_replace('/([。；])\s*/u', '$1<br>', $solution) ?? $solution;
                        }
                        $solution = preg_replace('/(<\/div>)\s*<br>\s*(步骤\s*[0-9一二三四五六七八九十百零两]+\s*[：:]?)/u', '$1$2', $solution) ?? $solution;
                        $solution = preg_replace('/(<\/div>)\s*<br>\s*(第\s*[0-9一二三四五六七八九十百零两]+\s*步\s*[：:]?)/u', '$1$2', $solution) ?? $solution;
                        $solution = preg_replace('/^(?:\s*<br\s*\/?>\s*)+/iu', '', $solution) ?? $solution;
                        $solution = preg_replace('/(?:<br>\s*){2,}/u', '<br>', $solution) ?? $solution;
                        $solution = preg_replace('/(?:\s*<br>\s*)*(<div class="case-subtitle">)/u', '$1', $solution) ?? $solution;
                        $solution = $markComplexDisplayMath($solution);

                        // 将「分析/详解」转换为可分页语义块：标题 + 内容。
                        // 仅短小纯文本节绑定；含图/display 公式的节允许自然分页，减少整块推页空白。
                        $caseSectionClass = static function (string $body, bool $hasTitle = true): string {
                            $plainLength = mb_strlen(trim(strip_tags($body)), 'UTF-8');
                            $containsImage = str_contains($body, '<img') || str_contains($body, 'pdf-figure');
                            $containsDisplayMath = str_contains($body, 'katex-display');
                            $isShortSection = $plainLength < 120 && !$containsImage && !$containsDisplayMath;

                            if ($hasTitle) {
                                return $isShortSection ? 'case-section case-section-keep' : 'case-section case-section-long';
                            }

                            return $isShortSection ? 'case-section case-section-keep case-section-plain' : 'case-section case-section-long case-section-plain';
                        };
                        $chunks = preg_split('/<div class="case-subtitle">(.*?)<\/div>/u', $solution, -1, PREG_SPLIT_DELIM_CAPTURE);
                        if (is_array($chunks) && count($chunks) > 1) {
                            $sectionHtml = '';
                            $lead = trim((string) ($chunks[0] ?? ''));
                            if ($lead !== '') {
                                $leadClass = $caseSectionClass($lead, false);
                                $sectionHtml .= '<div class="' . $leadClass . '"><div class="case-section-content">' . $lead . '</div></div>';
                            }
                            for ($i = 1; $i < count($chunks); $i += 2) {
                                $title = trim((string) ($chunks[$i] ?? ''));
                                $body = trim((string) ($chunks[$i + 1] ?? ''));
                                if ($title === '' && $body === '') {
                                    continue;
                                }
                                $sectionClass = $caseSectionClass($body, true);
                                $sectionHtml .= '<div class="' . $sectionClass . '"><div class="case-subtitle">' . $title . '</div><div class="case-section-content">' . $body . '</div></div>';
                            }
                            if ($sectionHtml !== '') {
                                $solution = $sectionHtml;
                            }
                        } else {
                            $plainClass = $caseSectionClass($solution, false);
                            $solution = '<div class="' . $plainClass . '"><div class="case-section-content">' . $solution . '</div></div>';
                        }
                        return $solution;
                    };
                @endphp
                <div class="kp-markdown"><h3>案例分析</h3></div>
                <div class="case-list">
                    @foreach($point['cases'] as $case)
                        @php
                            $sourceText = '';
                            if (!empty($case['child_kp_name'])) {
                                // 只展示子知识点来源，不展示父知识点名称
                                $sourceText = trim((string) $case['child_kp_name']);
                                $parentName = trim((string) ($point['kp_name'] ?? ''));
                                if ($parentName !== '') {
                                    $escapedParent = preg_quote($parentName, '/');
                                    $sourceText = preg_replace('/^' . $escapedParent . '\s*[-—－\/]\s*/u', '', $sourceText) ?? $sourceText;
                                }
                                if (preg_match('/[-—－\/]/u', $sourceText)) {
                                    $parts = preg_split('/\s*[-—－\/]\s*/u', $sourceText);
                                    if (is_array($parts) && !empty($parts)) {
                                        $sourceText = trim((string) end($parts));
                                    }
                                }
                            } elseif (!empty($case['is_wrong_case'])) {
                                $sourceText = '错题讲解';
                            } elseif (($case['source_type'] ?? '') === 'reviewed') {
                                $sourceText = '已做题';
                            } elseif (($case['source_type'] ?? '') === 'fallback') {
                                $sourceText = '补充题';
                            }
                        @endphp
                        <div class="case-item">
                            <div class="kp-case-row">
                                @php
                                    $stemLine = trim((string) ($case['stem'] ?? ''));
                                    if ($stemLine === '') {
                                        $renderedStemHtml = '—';
                                    } else {
                                        [$renderedStemHtml] = \App\Support\BlankPlaceholderRenderer::replaceToBlankSpan($stemLine, null, true, false);
                                        $renderedStemHtml = \App\Support\BlankPlaceholderRenderer::normalizeTerminalPunctuation($renderedStemHtml, 'remove');
                                        $renderedStemHtml = $formatStemLikePaper($renderedStemHtml);
                                        $renderedStemHtml = \App\Services\MathFormulaProcessor::processFormulas($renderedStemHtml);
                                        $renderedStemHtml = $markComplexDisplayMath($renderedStemHtml);
                                    }
                                @endphp
                                <div class="kp-case-head-inline">
                                    <span class="kp-case-prefix">
                                        <span class="kp-case-title">例{{ $loop->iteration }}.</span>
                                        @if($sourceText !== '')
                                            <span class="kp-case-source">（{{ $sourceText }}）</span>
                                        @endif
                                    </span>
                                    <span class="kp-case-head-content">
                                        <span class="kp-case-stem">{!! $renderedStemHtml !!}</span>
                                    </span>
                                </div>
                                @php
                                    $options = (array) ($case['options'] ?? []);
                                @endphp
                                @if(!empty($options))
                                    @include('pdf.partials.exam-choice-options', [
                                        'options' => $options,
                                        'gradingMode' => false,
                                        'mathProcessed' => false,
                                        'logQuestionNumber' => 'kp-' . ($case['question_id'] ?? $loop->iteration),
                                        'showLeadSpacer' => false,
                                    ])
                                @endif
                            </div>
                            <div class="kp-case-meta-block">
                                @php
                                    $layoutDeciderService = app(\App\Support\OptionLayoutDecider::class);
                                    $choiceAnswerRaw = $layoutDeciderService->normalizeCompactMathForDisplay(trim((string) ($case['answer'] ?? '')));
                                    $solutionText = trim((string) ($case['solution'] ?? ''));
                                    $solutionText = preg_replace('/^【?\s*解题思路\s*】?\s*[:：]?\s*/u', '', $solutionText) ?? $solutionText;
                                    $solutionProcessed = $solutionText === ''
                                        ? ''
                                        : \App\Services\MathFormulaProcessor::processFormulas($solutionText);
                                    $solutionHtml = $solutionProcessed === ''
                                        ? '<span style="color:#999;font-style:italic;">（暂无解题思路）</span>'
                                        : $formatSolution($solutionProcessed);
                                    $answerLineHtml = $choiceAnswerRaw === ''
                                        ? '—'
                                        : \App\Services\MathFormulaProcessor::processFormulas($choiceAnswerRaw);
                                @endphp
                                <div class="answer-meta">
                                    <div class="answer-line kp-case-answer-row"><strong>正确答案：</strong><span class="solution-content">{!! $answerLineHtml !!}</span></div>
                                    <div class="answer-line kp-case-solution-row"><strong>解题思路：</strong><span class="solution-content kp-case-content">{!! $solutionHtml !!}</span></div>
                                </div>
                            </div>
                        </div>
                    @endforeach
                </div>
            @endif
        </div>
    @endforeach
        </div>
    @endif
</div>
</body>
</html>