// 全局元素索引（将由Python动态注入）
// const elementIndex = {};

// 卡片展开/收起功能
function toggleCardDetails(cardId) {
    const detailsElement = document.getElementById(cardId + '-details');
    const cardElement = document.querySelector('[data-card-id="' + cardId + '"]');
    
    if (!detailsElement || !cardElement) {
        return;
    }
    
    // 切换显示/隐藏
    if (detailsElement.style.display === 'none' || !detailsElement.style.display) {
        detailsElement.style.display = 'block';
        cardElement.classList.add('expanded');
        // 更新图标
        const toggleIcon = cardElement.querySelector('.toggle-icon');
        if (toggleIcon) {
            toggleIcon.textContent = '▲';
        }
    } else {
        detailsElement.style.display = 'none';
        cardElement.classList.remove('expanded');
        // 更新图标
        const toggleIcon = cardElement.querySelector('.toggle-icon');
        if (toggleIcon) {
            toggleIcon.textContent = '▼';
        }
    }
}

// 显示元素详情模态框
function showElementDetail(elementId) {
    const elem = elementIndex[elementId];
    if (!elem) return;

    // 创建模态框
    const modal = document.createElement('div');
    modal.className = 'element-modal-backdrop';
    modal.onclick = function(e) {
        if (e.target === modal) {
            document.body.removeChild(modal);
        }
    };

    // 创建模态框内容
    const modalContent = document.createElement('div');
    modalContent.className = 'element-modal-content';
    modalContent.onclick = function(e) {
        e.stopPropagation();
    };

    // 构建内容
    let html = '<div class="modal-header">';
    html += '<h3>' + elem.name + '</h3>';
    html += '<button class="modal-close" onclick="this.closest(\'.element-modal-backdrop\').remove()">×</button>';
    html += '</div>';

    html += '<div class="modal-body">';

    // 描述
    if (elem.description) {
        html += '<div class="modal-section">';
        html += '<strong>描述：</strong>';
        html += '<p>' + elem.description + '</p>';
        html += '</div>';
    }

    // 类型和维度
    html += '<div class="modal-section">';
    html += '<strong>类型：</strong> ' + elem.type;
    if (elem.dimension && elem.dimension.一级) {
        html += ' / ' + elem.dimension.一级;
        if (elem.dimension.二级) {
            html += ' / ' + elem.dimension.二级;
        }
    }
    html += '</div>';

    // 分类
    if (elem.category) {
        html += '<div class="modal-section">';
        html += '<strong>分类：</strong>';
        if (typeof elem.category === 'object') {
            html += ' ' + (elem.category.一级分类 || '');
            if (elem.category.二级分类) {
                html += ' / ' + elem.category.二级分类;
            }
        } else {
            html += ' ' + elem.category;
        }
        html += '</div>';
    }

    // 跳转到Tab3查看完整信息
    html += '<div class="modal-footer">';
    html += '<button class="modal-btn" onclick="jumpToElement(\'' + elem.id + '\')">查看完整信息</button>';
    html += '</div>';

    html += '</div>';

    modalContent.innerHTML = html;
    modal.appendChild(modalContent);
    document.body.appendChild(modal);
}

// 跳转到元素详情（Tab3）
function jumpToElement(elementId) {
    // 关闭模态框
    const modal = document.querySelector('.element-modal-backdrop');
    if (modal) {
        modal.remove();
    }

    // 切换到Tab3
    switchTab('tab3');

    // 等待DOM更新后滚动到元素
    setTimeout(function() {
        const elemItem = document.querySelector('[data-elem-id="' + elementId + '"]');
        if (elemItem) {
            // 展开所有父级容器
            let parent = elemItem.parentElement;
            while (parent) {
                if (parent.classList.contains('collapsed')) {
                    parent.classList.remove('collapsed');
                }
                parent = parent.parentElement;
            }

            // 滚动到元素并高亮
            elemItem.scrollIntoView({ behavior: 'smooth', block: 'center' });
            elemItem.classList.add('highlight-pulse');
            setTimeout(function() {
                elemItem.classList.remove('highlight-pulse');
            }, 2000);
        }
    }, 100);
}

// Tab切换功能
function switchTab(tabId) {
    // 隐藏所有tab内容
    const allTabs = document.querySelectorAll('.tab-content');
    allTabs.forEach(tab => {
        tab.style.display = 'none';
    });

    // 移除所有tab的active类
    const allTabButtons = document.querySelectorAll('.tab');
    allTabButtons.forEach(btn => {
        btn.classList.remove('active');
    });

    // 显示选中的tab内容
    document.getElementById(tabId).style.display = 'block';

    // 给选中的tab按钮添加active类
    if (event && event.target) {
        event.target.classList.add('active');
    } else {
        // 程序化切换时，手动添加active类
        document.querySelectorAll('.tab').forEach((btn, idx) => {
            if ((tabId === 'tab1' && idx === 0) ||
                (tabId === 'tab2' && idx === 1) ||
                (tabId === 'tab3' && idx === 2) ||
                (tabId === 'tab4' && idx === 3) ||
                (tabId === 'tab5' && idx === 4)) {
                btn.classList.add('active');
            }
        });
    }

    // 如果切换到tab4，重新绘制连线
    if (tabId === 'tab4') {
        setTimeout(() => {
            drawAllConnections();
        }, 100);
    }

    // Tab5 不在切换时自动绘制连线，只在点击卡片时绘制
}

// 展开/收起段落功能
function toggleCollapse(element) {
    const listItem = element.closest('.paragraph-item');
    if (!listItem.classList.contains('collapsible')) {
        return;
    }
    listItem.classList.toggle('collapsed');
}

// 展开/收起段落详细内容
function toggleDetails(element) {
    const detailsContainer = element.closest('.paragraph-item')
        .querySelector('.paragraph-details');
    if (detailsContainer) {
        detailsContainer.classList.toggle('collapsed');
        const toggleBtn = element.closest('.paragraph-header')
            .querySelector('.details-toggle-btn');
        if (detailsContainer.classList.contains('collapsed')) {
            toggleBtn.innerHTML = '<span class="details-icon">▶</span> 查看详细内容';
        } else {
            toggleBtn.innerHTML = '<span class="details-icon">▶</span> 隐藏详细内容';
        }
    }
}

// Tab3: 展开/收起第一层级（实质/形式）
function toggleLevel1(element) {
    element.classList.toggle('collapsed');
}

// Tab3: 展开/收起第二层级（具体元素/具体概念/抽象概念）
function toggleLevel2(element) {
    element.classList.toggle('collapsed');
}

// Tab3: 展开/收起分类组
function toggleCategoryGroup(element) {
    const categoryGroup = element.closest('.category-group');
    if (categoryGroup && categoryGroup.classList.contains('collapsible')) {
        categoryGroup.classList.toggle('collapsed');
    }
}

// Tab3: 展开/收起二级分类组
function toggleSubcategoryGroup(element) {
    const subcategoryGroup = element.closest('.subcategory-group');
    if (subcategoryGroup && subcategoryGroup.classList.contains('collapsible')) {
        subcategoryGroup.classList.toggle('collapsed');
    }
}

// Tab3: 展开/收起元素详情
function toggleElementDetails(element) {
    const elementItem = element.closest('.element-item');
    const detailsContainer = elementItem.querySelector('.element-details');

    if (detailsContainer) {
        event.stopPropagation();
        elementItem.classList.toggle('expanded');
        detailsContainer.classList.toggle('collapsed');
    }
}

// Tab3: 全部展开/收起所有层级
function toggleAllLevels(expand) {
    // 第一层级
    const level1Headers = document.querySelectorAll('.level1-header');
    level1Headers.forEach(header => {
        if (expand) {
            header.classList.remove('collapsed');
        } else {
            header.classList.add('collapsed');
        }
    });

    // 第二层级
    const level2Headers = document.querySelectorAll('.level2-header');
    level2Headers.forEach(header => {
        if (expand) {
            header.classList.remove('collapsed');
        } else {
            header.classList.add('collapsed');
        }
    });

    // 分类组
    const categoryGroups = document.querySelectorAll('.category-group.collapsible');
    categoryGroups.forEach(group => {
        if (expand) {
            group.classList.remove('collapsed');
        } else {
            group.classList.add('collapsed');
        }
    });

    // 二级分类组
    const subcategoryGroups = document.querySelectorAll('.subcategory-group.collapsible');
    subcategoryGroups.forEach(group => {
        if (expand) {
            group.classList.remove('collapsed');
        } else {
            group.classList.add('collapsed');
        }
    });
}

// 旧版本兼容：保持toggleAllCategories函数
function toggleAllCategories(expand) {
    toggleAllLevels(expand);
}

// 页面加载完成后初始化
document.addEventListener('DOMContentLoaded', function() {
    console.log('脚本结果可视化页面已加载');

    // 初始化Tab4连线图
    if (document.getElementById('tab4')) {
        initializeRelationshipGraph();
    }
});

// ===== Tab4 关系图功能 =====

// 初始化关系图
function initializeRelationshipGraph() {
    // 延迟执行以确保DOM完全加载
    setTimeout(() => {
        // 初始状态：隐藏所有右侧节点
        resetRelationshipView();

        // 监听窗口大小变化，重新绘制连线
        window.addEventListener('resize', debounce(() => {
            if (selectedSubstanceId && relationshipData[selectedSubstanceId]) {
                drawSelectedSubstanceConnections(selectedSubstanceId, relationshipData[selectedSubstanceId]);
            }
        }, 300));
    }, 100);
}

// 绘制所有连线
function drawAllConnections() {
    if (typeof relationshipData === 'undefined') {
        return;
    }

    const svg = document.getElementById('relationship-svg');
    if (!svg) return;

    // 清空现有连线
    svg.innerHTML = '';

    // 遍历所有实质点
    Object.keys(relationshipData).forEach(substanceId => {
        const relations = relationshipData[substanceId];

        // 绘制到灵感点的连线
        relations.inspiration.forEach(rel => {
            // 兼容新结构（支撑）和旧结构（相似度分数）
            const score = rel.avg_score !== undefined ? rel.avg_score : (rel.support_reason !== undefined ? 1.0 : 0.5);
            drawConnection(substanceId, rel.target, 'inspiration', score);
        });

        // 绘制到目的点的连线
        relations.purpose.forEach(rel => {
            const score = rel.avg_score !== undefined ? rel.avg_score : (rel.support_reason !== undefined ? 1.0 : 0.5);
            drawConnection(substanceId, rel.target, 'purpose', score);
        });

        // 绘制到关键点的连线
        relations.keypoint.forEach(rel => {
            const score = rel.avg_score !== undefined ? rel.avg_score : (rel.support_reason !== undefined ? 1.0 : 0.5);
            drawConnection(substanceId, rel.target, 'keypoint', score);
        });
    });
}

// 绘制单条连线
function drawConnection(sourceId, targetId, type, score) {
    const svg = document.getElementById('relationship-svg');
    if (!svg) return;

    const sourceNode = document.querySelector(`.substance-node[data-id="${sourceId}"]`);
    const targetNode = document.querySelector(`.target-node[data-id="${targetId}"]`);

    if (!sourceNode || !targetNode) return;

    // 获取节点位置
    const sourceRect = sourceNode.getBoundingClientRect();
    const targetRect = targetNode.getBoundingClientRect();
    const containerRect = svg.parentElement.getBoundingClientRect();

    // 计算相对于SVG容器的位置
    const x1 = sourceRect.right - containerRect.left;
    const y1 = sourceRect.top + sourceRect.height / 2 - containerRect.top;
    const x2 = targetRect.left - containerRect.left;
    const y2 = targetRect.top + targetRect.height / 2 - containerRect.top;

    // 创建贝塞尔曲线路径
    const midX = (x1 + x2) / 2;
    const path = `M ${x1} ${y1} Q ${midX} ${y1}, ${midX} ${(y1 + y2) / 2} T ${x2} ${y2}`;

    // 创建path元素
    const pathElement = document.createElementNS('http://www.w3.org/2000/svg', 'path');
    pathElement.setAttribute('d', path);
    pathElement.setAttribute('class', `connection-line ${type}`);
    pathElement.setAttribute('fill', 'none');
    pathElement.setAttribute('data-source', sourceId);
    pathElement.setAttribute('data-target', targetId);
    pathElement.setAttribute('data-type', type);
    pathElement.setAttribute('data-score', score);

    svg.appendChild(pathElement);
}

// 高亮相关关系
function highlightRelationships(substanceId) {
    if (typeof relationshipData === 'undefined') {
        return;
    }

    // 清除之前的高亮
    clearHighlights();

    // 高亮当前实质点
    const substanceNode = document.querySelector(`.substance-node[data-id="${substanceId}"]`);
    if (substanceNode) {
        substanceNode.classList.add('highlighted');
    }

    // 获取相关关系
    const relations = relationshipData[substanceId];
    if (!relations) return;

    // 高亮相关的目标点
    [...relations.inspiration, ...relations.purpose, ...relations.keypoint].forEach(rel => {
        const targetNode = document.querySelector(`.target-node[data-id="${rel.target}"]`);
        if (targetNode) {
            targetNode.classList.add('highlighted');
        }
    });

    // 高亮相关的连线
    const lines = document.querySelectorAll(`.connection-line[data-source="${substanceId}"]`);
    lines.forEach(line => {
        line.classList.add('highlighted');
    });
}

// 清除所有高亮
function clearHighlights() {
    // 清除节点高亮
    document.querySelectorAll('.node.highlighted').forEach(node => {
        node.classList.remove('highlighted');
    });

    // 清除连线高亮
    document.querySelectorAll('.connection-line.highlighted').forEach(line => {
        line.classList.remove('highlighted');
    });
}

// 防抖函数
function debounce(func, wait) {
    let timeout;
    return function executedFunction(...args) {
        const later = () => {
            clearTimeout(timeout);
            func(...args);
        };
        clearTimeout(timeout);
        timeout = setTimeout(later, wait);
    };
}

// ===== Tab4 新增：点击选择实质点功能 =====

let selectedSubstanceId = null;

// 选择实质点，展示关联关系
function selectSubstance(substanceId) {
    if (typeof relationshipData === 'undefined') {
        return;
    }

    // 如果点击已选中的实质点，不做处理
    if (selectedSubstanceId === substanceId) {
        return;
    }

    selectedSubstanceId = substanceId;

    // 显示重置按钮
    const resetBtn = document.querySelector('.reset-btn');
    if (resetBtn) {
        resetBtn.style.display = 'block';
    }

    // 获取关系数据
    const relations = relationshipData[substanceId];
    if (!relations) return;

    // 收集所有关联的节点ID
    const relatedNodeIds = new Set();

    // 添加灵感点
    relations.inspiration.forEach(rel => {
        relatedNodeIds.add(rel.target);
    });

    // 添加目的点
    relations.purpose.forEach(rel => {
        relatedNodeIds.add(rel.target);
    });

    // 添加关键点
    relations.keypoint.forEach(rel => {
        relatedNodeIds.add(rel.target);
    });

    // 添加关联的实质点
    relations.substance.forEach(rel => {
        relatedNodeIds.add(rel.target);
    });

    // 高亮左侧选中的实质点
    document.querySelectorAll('.substance-node').forEach(node => {
        if (node.getAttribute('data-id') === substanceId) {
            node.classList.add('selected');
            node.classList.remove('dimmed');
        } else {
            node.classList.remove('selected');
            node.classList.add('dimmed');
        }
    });

    // 右侧节点：只显示关联的节点
    document.querySelectorAll('.target-node').forEach(node => {
        const nodeId = node.getAttribute('data-id');
        if (relatedNodeIds.has(nodeId)) {
            node.classList.add('visible');
            node.classList.remove('hidden');
        } else {
            node.classList.remove('visible');
            node.classList.add('hidden');
        }
    });

    // 根据右侧节点的可见性，控制section的显示
    document.querySelectorAll('.target-section').forEach(section => {
        const visibleNodes = section.querySelectorAll('.target-node.visible');
        if (visibleNodes.length > 0) {
            section.classList.add('has-visible-nodes');
            section.classList.remove('all-hidden');
        } else {
            section.classList.remove('has-visible-nodes');
            section.classList.add('all-hidden');
        }
    });

    // 重新绘制连线（只绘制选中实质点的连线）
    drawSelectedSubstanceConnections(substanceId, relations);
}

// 重置视图
function resetRelationshipView() {
    selectedSubstanceId = null;

    // 隐藏重置按钮
    const resetBtn = document.querySelector('.reset-btn');
    if (resetBtn) {
        resetBtn.style.display = 'none';
    }

    // 左侧实质点：移除所有高亮和变暗
    document.querySelectorAll('.substance-node').forEach(node => {
        node.classList.remove('selected', 'dimmed');
    });

    // 右侧节点：隐藏所有节点
    document.querySelectorAll('.target-node').forEach(node => {
        node.classList.remove('visible');
        node.classList.add('hidden');
    });

    // 隐藏所有section
    document.querySelectorAll('.target-section').forEach(section => {
        section.classList.remove('has-visible-nodes');
        section.classList.add('all-hidden');
    });

    // 清空连线
    const svg = document.getElementById('relationship-svg');
    if (svg) {
        svg.innerHTML = '';
    }
}

// 绘制选中实质点的连线
function drawSelectedSubstanceConnections(substanceId, relations) {
    const svg = document.getElementById('relationship-svg');
    if (!svg) return;

    // 清空现有连线
    svg.innerHTML = '';

    // 绘制到灵感点的连线
    relations.inspiration.forEach(rel => {
        // 兼容新结构（支撑）和旧结构（相似度分数）
        const score = rel.avg_score !== undefined ? rel.avg_score : (rel.support_reason !== undefined ? 1.0 : 0.5);
        drawConnection(substanceId, rel.target, 'inspiration', score);
    });

    // 绘制到目的点的连线
    relations.purpose.forEach(rel => {
        const score = rel.avg_score !== undefined ? rel.avg_score : (rel.support_reason !== undefined ? 1.0 : 0.5);
        drawConnection(substanceId, rel.target, 'purpose', score);
    });

    // 绘制到关键点的连线
    relations.keypoint.forEach(rel => {
        const score = rel.avg_score !== undefined ? rel.avg_score : (rel.support_reason !== undefined ? 1.0 : 0.5);
        drawConnection(substanceId, rel.target, 'keypoint', score);
    });

    // 绘制到其他实质点的连线
    relations.substance.forEach(rel => {
        drawConnection(substanceId, rel.target, 'substance', rel.common_count / 10);
    });
}

// ===== Tab4 新版支撑关系图功能 =====

let selectedSupportSubstanceId = null;
let selectedSupportTargetId = null;

// 选择实质点（新版）
function selectSubstance(substanceId) {
    if (typeof supportRelationships === 'undefined') {
        console.error('supportRelationships not defined');
        return;
    }

    // 如果点击已选中的实质点，不做处理
    if (selectedSupportSubstanceId === substanceId) {
        return;
    }

    selectedSupportSubstanceId = substanceId;
    selectedSupportTargetId = null;

    // 清空画布
    clearSupportCanvas();

    // 获取关系数据
    const relations = supportRelationships.substance_to_target[substanceId];
    if (!relations) {
        console.error('No relations found for substance:', substanceId);
        return;
    }

    // 高亮选中的实质点，其他变暗
    document.querySelectorAll('.substance-card').forEach(card => {
        if (card.getAttribute('data-id') === substanceId) {
            card.classList.add('selected');
            card.classList.remove('dimmed');
        } else {
            card.classList.remove('selected');
            card.classList.add('dimmed');
        }
    });

    // 清除所有目标点的状态
    document.querySelectorAll('.target-card').forEach(card => {
        card.classList.remove('selected', 'dimmed', 'highlighted');
    });

    // 根据关系数据高亮相关的目标点
    const relatedTargets = new Set();

    relations.inspiration.forEach(rel => {
        relatedTargets.add(rel.target_id);
    });
    relations.purpose.forEach(rel => {
        relatedTargets.add(rel.target_id);
    });
    relations.keypoint.forEach(rel => {
        relatedTargets.add(rel.target_id);
    });

    // 高亮相关的目标点，其他变暗
    document.querySelectorAll('.target-card').forEach(card => {
        const cardId = card.getAttribute('data-id');
        if (relatedTargets.has(cardId)) {
            card.classList.add('highlighted');
            card.classList.remove('dimmed');
        } else {
            card.classList.add('dimmed');
            card.classList.remove('highlighted');
        }
    });

    // 绘制支撑关系（使用Sankey风格或树状结构）
    drawSupportRelationships(substanceId, relations);
}

// 选择目标点（反向查看）
function selectTarget(targetType, targetIndex) {
    if (typeof supportRelationships === 'undefined') {
        console.error('supportRelationships not defined');
        return;
    }

    const targetId = `${targetType}-${targetIndex}`;

    // 如果点击已选中的目标点，不做处理
    if (selectedSupportTargetId === targetId) {
        return;
    }

    selectedSupportSubstanceId = null;
    selectedSupportTargetId = targetId;

    // 清空画布
    clearSupportCanvas();

    // 获取反向关系数据
    const relations = supportRelationships.target_to_substance[targetId];
    if (!relations) {
        console.error('No relations found for target:', targetId);
        return;
    }

    // 清除所有实质点的状态
    document.querySelectorAll('.substance-card').forEach(card => {
        card.classList.remove('selected', 'dimmed', 'highlighted');
    });

    // 高亮选中的目标点，其他变暗
    document.querySelectorAll('.target-card').forEach(card => {
        if (card.getAttribute('data-id') === targetId) {
            card.classList.add('selected');
            card.classList.remove('dimmed');
        } else {
            card.classList.remove('selected');
            card.classList.add('dimmed');
        }
    });

    // 收集所有支撑该目标点的实质点ID
    const supportingSubstances = new Set();
    relations.concrete_elements.forEach(item => supportingSubstances.add(item.substance_id));
    relations.concrete_concepts.forEach(item => supportingSubstances.add(item.substance_id));
    relations.abstract_concepts.forEach(item => supportingSubstances.add(item.substance_id));

    // 高亮支撑的实质点，其他变暗
    document.querySelectorAll('.substance-card').forEach(card => {
        const cardId = card.getAttribute('data-id');
        if (supportingSubstances.has(cardId)) {
            card.classList.add('highlighted');
            card.classList.remove('dimmed');
        } else {
            card.classList.add('dimmed');
            card.classList.remove('highlighted');
        }
    });

    // 绘制反向支撑关系
    drawReverseSupportRelationships(targetId, relations);
}

// 绘制支撑关系（实质点 → 目标点）
function drawSupportRelationships(substanceId, relations) {
    const canvas = document.getElementById('support-canvas');
    if (!canvas) return;

    // 清空并移除占位文本
    const placeholder = canvas.querySelector('.placeholder-text');
    if (placeholder) {
        placeholder.style.display = 'none';
    }

    // 创建可视化内容
    let html = '<div class="support-flow">\n';
    html += '<div class="flow-title">支撑关系</div>\n';

    // 显示来源实质点
    const substanceData = supportRelationships.substance_to_target[substanceId];
    html += '<div class="flow-source">\n';
    html += '<div class="flow-node substance-flow-node">\n';
    html += `<div class="flow-node-label">${substanceData.type || '实质点'}</div>\n`;
    html += `<div class="flow-node-name">${substanceData.name || substanceId}</div>\n`;
    html += '</div>\n';
    html += '</div>\n';

    // 显示支撑的目标点（分类）
    html += '<div class="flow-targets">\n';

    if (relations.inspiration && relations.inspiration.length > 0) {
        html += '<div class="flow-target-group">\n';
        html += '<div class="flow-target-label">灵感点</div>\n';
        relations.inspiration.forEach(rel => {
            html += `<div class="flow-target-item inspiration-flow">\n`;
            html += `<div class="flow-target-text">${rel.point}</div>\n`;
            // 兼容新结构（支撑理由）和旧结构（相似度分数）
            if (rel.support_reason !== undefined) {
                html += `<div class="flow-target-score">支撑</div>\n`;
            } else if (rel.avg_score !== undefined) {
                const score = (rel.avg_score * 100).toFixed(0);
                html += `<div class="flow-target-score">相似度: ${score}%</div>\n`;
            }
            html += '</div>\n';
        });
        html += '</div>\n';
    }

    if (relations.purpose && relations.purpose.length > 0) {
        html += '<div class="flow-target-group">\n';
        html += '<div class="flow-target-label">目的点</div>\n';
        relations.purpose.forEach(rel => {
            html += `<div class="flow-target-item purpose-flow">\n`;
            html += `<div class="flow-target-text">${rel.point}</div>\n`;
            // 兼容新结构（支撑理由）和旧结构（相似度分数）
            if (rel.support_reason !== undefined) {
                html += `<div class="flow-target-score">支撑</div>\n`;
            } else if (rel.avg_score !== undefined) {
                const score = (rel.avg_score * 100).toFixed(0);
                html += `<div class="flow-target-score">相似度: ${score}%</div>\n`;
            }
            html += '</div>\n';
        });
        html += '</div>\n';
    }

    if (relations.keypoint && relations.keypoint.length > 0) {
        html += '<div class="flow-target-group">\n';
        html += '<div class="flow-target-label">关键点</div>\n';
        relations.keypoint.forEach(rel => {
            html += `<div class="flow-target-item keypoint-flow">\n`;
            html += `<div class="flow-target-text">${rel.point}</div>\n`;
            // 兼容新结构（支撑理由）和旧结构（相似度分数）
            if (rel.support_reason !== undefined) {
                html += `<div class="flow-target-score">支撑</div>\n`;
            } else if (rel.avg_score !== undefined) {
                const score = (rel.avg_score * 100).toFixed(0);
                html += `<div class="flow-target-score">相似度: ${score}%</div>\n`;
            }
            html += '</div>\n';
        });
        html += '</div>\n';
    }

    html += '</div>\n';
    html += '</div>\n';

    // 插入到画布
    canvas.insertAdjacentHTML('beforeend', html);
}

// 绘制反向支撑关系（目标点 ← 实质点）
function drawReverseSupportRelationships(targetId, relations) {
    const canvas = document.getElementById('support-canvas');
    if (!canvas) return;

    // 清空并移除占位文本
    const placeholder = canvas.querySelector('.placeholder-text');
    if (placeholder) {
        placeholder.style.display = 'none';
    }

    // 创建可视化内容
    let html = '<div class="support-flow reverse">\n';
    html += '<div class="flow-title">被以下实质点支撑</div>\n';

    // 显示目标点
    html += '<div class="flow-source">\n';
    html += '<div class="flow-node target-flow-node">\n';
    html += `<div class="flow-node-label">目标点</div>\n`;
    html += `<div class="flow-node-name">${targetId}</div>\n`;
    html += '</div>\n';
    html += '</div>\n';

    // 显示支撑的实质点（分类）
    html += '<div class="flow-targets">\n';

    if (relations.concrete_elements && relations.concrete_elements.length > 0) {
        html += '<div class="flow-target-group">\n';
        html += '<div class="flow-target-label">具体元素</div>\n';
        relations.concrete_elements.forEach(item => {
            const score = (item.score * 100).toFixed(0);
            html += `<div class="flow-target-item concrete-element-flow">\n`;
            html += `<div class="flow-target-text">${item.name}</div>\n`;
            html += `<div class="flow-target-score">相似度: ${score}%</div>\n`;
            html += '</div>\n';
        });
        html += '</div>\n';
    }

    if (relations.concrete_concepts && relations.concrete_concepts.length > 0) {
        html += '<div class="flow-target-group">\n';
        html += '<div class="flow-target-label">具体概念</div>\n';
        relations.concrete_concepts.forEach(item => {
            const score = (item.score * 100).toFixed(0);
            html += `<div class="flow-target-item concrete-concept-flow">\n`;
            html += `<div class="flow-target-text">${item.name}</div>\n`;
            html += `<div class="flow-target-score">相似度: ${score}%</div>\n`;
            html += '</div>\n';
        });
        html += '</div>\n';
    }

    if (relations.abstract_concepts && relations.abstract_concepts.length > 0) {
        html += '<div class="flow-target-group">\n';
        html += '<div class="flow-target-label">抽象概念</div>\n';
        relations.abstract_concepts.forEach(item => {
            const score = (item.score * 100).toFixed(0);
            html += `<div class="flow-target-item abstract-concept-flow">\n`;
            html += `<div class="flow-target-text">${item.name}</div>\n`;
            html += `<div class="flow-target-score">相似度: ${score}%</div>\n`;
            html += '</div>\n';
        });
        html += '</div>\n';
    }

    html += '</div>\n';
    html += '</div>\n';

    // 插入到画布
    canvas.insertAdjacentHTML('beforeend', html);
}

// 清空支撑关系画布
function clearSupportCanvas() {
    const canvas = document.getElementById('support-canvas');
    if (!canvas) return;

    // 移除所有flow相关元素
    const flows = canvas.querySelectorAll('.support-flow');
    flows.forEach(flow => flow.remove());

    // 重新显示占位文本
    const placeholder = canvas.querySelector('.placeholder-text');
    if (placeholder) {
        placeholder.style.display = 'flex';
    }
}

// ===== Tab5 实质与形式双向支撑关系图功能 =====

let selectedLeftTargetType = null;  // 左侧选题点类型：inspiration/keypoint/purpose
let selectedLeftTargetIdx = null;    // 左侧选题点索引
let selectedTab5SubstanceId = null;  // 选中的实质点ID (Tab5专用)
let selectedFormId = null;           // 选中的形式点ID
let selectedRightTargetType = null;  // 右侧选题点类型：inspiration/keypoint/purpose
let selectedRightTargetIdx = null;   // 右侧选题点索引

// 选择左侧选题点（来自实质点支撑关系）
function selectLeftTarget(targetType, targetIdx) {
    if (typeof tab5Relationships === 'undefined') {
        console.error('tab5Relationships not defined');
        return;
    }

    // 如果点击已选中的目标点，重置显示所有元素
    if (selectedLeftTargetType === targetType && selectedLeftTargetIdx === targetIdx) {
        resetTab5Selection();
        return;
    }

    // 重置其他选择
    resetTab5Selection();

    selectedLeftTargetType = targetType;
    selectedLeftTargetIdx = targetIdx;

    // 高亮选中的目标点
    document.querySelectorAll('.tab5-left-targets .target-card').forEach(card => {
        const dataType = card.getAttribute('data-type');
        const dataId = card.getAttribute('data-id');
        const fullId = `${targetType}-${targetIdx}`;

        if (dataId === fullId) {
            card.classList.add('selected');
            card.classList.remove('dimmed', 'hidden');
        } else {
            card.classList.remove('selected');
            card.classList.add('hidden');
            card.classList.remove('dimmed');
        }
    });

    // 形式点全部隐藏
    document.querySelectorAll('.tab5-forms .form-card').forEach(card => {
        card.classList.add('hidden');
        card.classList.remove('selected', 'highlighted', 'dimmed');
    });

    // 右侧选题点全部隐藏
    document.querySelectorAll('.tab5-right-targets .target-card').forEach(card => {
        card.classList.add('hidden');
        card.classList.remove('selected', 'highlighted', 'dimmed');
    });

    // 获取反向关系：哪些实质点支撑这个目标点（直接使用完整的targetIdx）
    const targetId = `${targetType}-${targetIdx}`;
    const supportingSubstances = tab5Relationships.target_from_substance[targetId];

    if (supportingSubstances && supportingSubstances.length > 0) {
        // 高亮支撑的实质点
        const substanceIds = new Set(supportingSubstances.map(s => s.substance_id));

        document.querySelectorAll('.tab5-substances .substance-card').forEach(card => {
            const cardId = card.getAttribute('data-id');
            if (substanceIds.has(cardId)) {
                card.classList.add('highlighted');
                card.classList.remove('dimmed', 'hidden');
            } else {
                card.classList.remove('highlighted');
                card.classList.add('hidden');
                card.classList.remove('dimmed');
            }
        });
    }

    // 绘制连线（只连接当前显示的卡片）
    setTimeout(() => {
        drawFormAllConnections();
    }, 50);
}

// 选择实质点
function selectSubstance(substanceId) {
    if (typeof tab5Relationships === 'undefined') {
        console.error('tab5Relationships not defined');
        return;
    }

    // 如果点击已选中的实质点，重置显示所有元素
    if (selectedTab5SubstanceId === substanceId) {
        resetTab5Selection();
        return;
    }

    // 重置其他选择
    resetTab5Selection();

    selectedTab5SubstanceId = substanceId;

    // 高亮选中的实质点
    document.querySelectorAll('.tab5-substances .substance-card').forEach(card => {
        const cardId = card.getAttribute('data-id');
        if (cardId === substanceId) {
            card.classList.add('selected');
            card.classList.remove('dimmed', 'hidden');
        } else {
            card.classList.remove('selected');
            card.classList.add('hidden');
            card.classList.remove('dimmed');
        }
    });

    // 形式点全部隐藏（先全部隐藏，后面再显示有关联的）
    document.querySelectorAll('.tab5-forms .form-card').forEach(card => {
        card.classList.add('hidden');
        card.classList.remove('selected', 'highlighted', 'dimmed');
    });

    // 右侧选题点全部隐藏
    document.querySelectorAll('.tab5-right-targets .target-card').forEach(card => {
        card.classList.add('hidden');
        card.classList.remove('selected', 'highlighted', 'dimmed');
    });

    // 获取这个实质点支撑的选题点
    const relations = tab5Relationships.substance_to_target[substanceId];

    if (relations) {
        const leftTargets = new Set();

        relations.inspiration.forEach(rel => leftTargets.add(rel.target_id));
        relations.purpose.forEach(rel => leftTargets.add(rel.target_id));
        relations.keypoint.forEach(rel => leftTargets.add(rel.target_id));

        // 高亮左侧相关选题点
        document.querySelectorAll('.tab5-left-targets .target-card').forEach(card => {
            const cardId = card.getAttribute('data-id');
            if (leftTargets.has(cardId)) {
                card.classList.add('highlighted');
                card.classList.remove('dimmed', 'hidden');
            } else {
                card.classList.remove('highlighted');
                card.classList.add('hidden');
                card.classList.remove('dimmed');
            }
        });
    }

    // 高亮支撑这个实质点的形式点（反向关系）
    const supportingForms = tab5Relationships.substance_from_form[substanceId];
    if (supportingForms && supportingForms.length > 0) {
        const formIds = new Set(supportingForms.map(f => f.form_id));

        document.querySelectorAll('.tab5-forms .form-card').forEach(card => {
            const cardId = card.getAttribute('data-id');
            if (formIds.has(cardId)) {
                card.classList.add('highlighted');
                card.classList.remove('dimmed', 'hidden');
            }
            // 注意：这里不对其他形式点再次隐藏，因为已经在前面全部隐藏了
        });
    }

    // 绘制连线（只连接当前显示的卡片）
    setTimeout(() => {
        drawFormAllConnections();
    }, 50);
}

// 选择形式点
function selectForm(formId) {
    if (typeof tab5Relationships === 'undefined') {
        console.error('tab5Relationships not defined');
        return;
    }

    // 如果点击已选中的形式点，重置显示所有元素
    if (selectedFormId === formId) {
        resetTab5Selection();
        return;
    }

    // 重置其他选择
    resetTab5Selection();

    selectedFormId = formId;

    // 高亮选中的形式点
    document.querySelectorAll('.tab5-forms .form-card').forEach(card => {
        const cardId = card.getAttribute('data-id');
        if (cardId === formId) {
            card.classList.add('selected');
            card.classList.remove('dimmed', 'hidden');
        } else {
            card.classList.remove('selected');
            card.classList.add('hidden');
            card.classList.remove('dimmed');
        }
    });

    // 实质点全部隐藏（先全部隐藏，后面再显示有关联的）
    document.querySelectorAll('.tab5-substances .substance-card').forEach(card => {
        card.classList.add('hidden');
        card.classList.remove('selected', 'highlighted', 'dimmed');
    });

    // 左侧选题点全部隐藏
    document.querySelectorAll('.tab5-left-targets .target-card').forEach(card => {
        card.classList.add('hidden');
        card.classList.remove('selected', 'highlighted', 'dimmed');
    });

    // 获取这个形式点支撑的选题点
    const relations = tab5Relationships.form_to_target[formId];

    if (relations) {
        const rightTargets = new Set();

        relations.inspiration.forEach(rel => rightTargets.add(rel.target_id));
        relations.purpose.forEach(rel => rightTargets.add(rel.target_id));
        relations.keypoint.forEach(rel => rightTargets.add(rel.target_id));

        // 高亮右侧相关选题点
        document.querySelectorAll('.tab5-right-targets .target-card').forEach(card => {
            const cardId = card.getAttribute('data-id');
            if (rightTargets.has(cardId)) {
                card.classList.add('highlighted');
                card.classList.remove('dimmed', 'hidden');
            } else {
                card.classList.remove('highlighted');
                card.classList.add('hidden');
                card.classList.remove('dimmed');
            }
        });
    }

    // 高亮这个形式点支撑的实质点
    const supportedSubstances = tab5Relationships.form_to_substance[formId];
    if (supportedSubstances && supportedSubstances.length > 0) {
        const substanceIds = new Set(supportedSubstances.map(s => s.substance_id));

        document.querySelectorAll('.tab5-substances .substance-card').forEach(card => {
            const cardId = card.getAttribute('data-id');
            if (substanceIds.has(cardId)) {
                card.classList.add('highlighted');
                card.classList.remove('dimmed', 'hidden');
            }
            // 注意：这里不对其他实质点再次隐藏，因为已经在前面全部隐藏了
        });
    }

    // 绘制连线（只连接当前显示的卡片）
    setTimeout(() => {
        drawFormAllConnections();
    }, 50);
}

// 选择右侧选题点（来自形式点支撑关系）
function selectRightTarget(targetType, targetIdx) {
    if (typeof tab5Relationships === 'undefined') {
        console.error('tab5Relationships not defined');
        return;
    }

    // 如果点击已选中的目标点，重置显示所有元素
    if (selectedRightTargetType === targetType && selectedRightTargetIdx === targetIdx) {
        resetTab5Selection();
        return;
    }

    // 重置其他选择
    resetTab5Selection();

    selectedRightTargetType = targetType;
    selectedRightTargetIdx = targetIdx;

    // 高亮选中的目标点
    document.querySelectorAll('.tab5-right-targets .target-card').forEach(card => {
        const dataType = card.getAttribute('data-type');
        const dataId = card.getAttribute('data-id');
        const fullId = `${targetType}-${targetIdx}`;

        if (dataId === fullId) {
            card.classList.add('selected');
            card.classList.remove('dimmed', 'hidden');
        } else {
            card.classList.remove('selected');
            card.classList.add('hidden');
            card.classList.remove('dimmed');
        }
    });

    // 实质点全部隐藏
    document.querySelectorAll('.tab5-substances .substance-card').forEach(card => {
        card.classList.add('hidden');
        card.classList.remove('selected', 'highlighted', 'dimmed');
    });

    // 左侧选题点全部隐藏
    document.querySelectorAll('.tab5-left-targets .target-card').forEach(card => {
        card.classList.add('hidden');
        card.classList.remove('selected', 'highlighted', 'dimmed');
    });

    // 获取反向关系：哪些形式点支撑这个目标点（直接使用完整的targetIdx）
    const targetId = `${targetType}-${targetIdx}`;
    const supportingForms = tab5Relationships.target_from_form[targetId];

    if (supportingForms && supportingForms.length > 0) {
        // 高亮支撑的形式点
        const formIds = new Set(supportingForms.map(f => f.form_id));

        document.querySelectorAll('.tab5-forms .form-card').forEach(card => {
            const cardId = card.getAttribute('data-id');
            if (formIds.has(cardId)) {
                card.classList.add('highlighted');
                card.classList.remove('dimmed', 'hidden');
            } else {
                card.classList.remove('highlighted');
                card.classList.add('hidden');
                card.classList.remove('dimmed');
            }
        });
    }

    // 绘制连线（只连接当前显示的卡片）
    setTimeout(() => {
        drawFormAllConnections();
    }, 50);
}

// 重置Tab5所有选择
function resetTab5Selection() {
    selectedLeftTargetType = null;
    selectedLeftTargetIdx = null;
    selectedSubstanceId = null;
    selectedFormId = null;
    selectedRightTargetType = null;
    selectedRightTargetIdx = null;

    // 清除所有高亮、选中和隐藏状态
    document.querySelectorAll('#tab5 .target-card, #tab5 .substance-card, #tab5 .form-card').forEach(card => {
        card.classList.remove('selected', 'dimmed', 'highlighted', 'hidden');
    });

    // 清除所有连线
    const svg = document.getElementById('tab5-connection-svg');
    if (svg) {
        svg.innerHTML = '';
    }
}

// 选择目标点（反向查看）
function selectFormTarget(targetType, targetId) {
    if (typeof formSupportRelationships === 'undefined') {
        console.error('formSupportRelationships not defined');
        return;
    }

    let fullTargetId;
    if (targetType === 'substance') {
        fullTargetId = `substance-${targetId}`;
    } else {
        fullTargetId = `${targetType}-${targetId}`;
    }

    // 如果点击已选中的目标点，不做处理
    if (selectedFormTargetId === fullTargetId) {
        return;
    }

    selectedFormId = null;
    selectedFormTargetId = fullTargetId;

    // 清空画布
    clearFormSupportCanvas();

    // 获取反向关系数据
    const relations = formSupportRelationships.target_to_form[fullTargetId];
    if (!relations) {
        console.error('No relations found for target:', fullTargetId);
        return;
    }

    // 清除所有形式点的状态
    document.querySelectorAll('.form-card').forEach(card => {
        card.classList.remove('selected', 'dimmed', 'highlighted');
    });

    // 高亮选中的目标点，其他变暗
    document.querySelectorAll('#tab5 .target-card').forEach(card => {
        if (card.getAttribute('data-id') === fullTargetId) {
            card.classList.add('selected');
            card.classList.remove('dimmed');
        } else {
            card.classList.remove('selected');
            card.classList.add('dimmed');
        }
    });

    // 收集所有支撑该目标点的形式点ID
    const supportingForms = new Set();

    if (relations.concrete_element_forms) {
        relations.concrete_element_forms.forEach(item => supportingForms.add(item.form_id));
    }
    if (relations.concrete_concept_forms) {
        relations.concrete_concept_forms.forEach(item => supportingForms.add(item.form_id));
    }
    if (relations.overall_forms) {
        relations.overall_forms.forEach(item => supportingForms.add(item.form_id));
    }
    if (relations.forms) {
        relations.forms.forEach(item => supportingForms.add(item.form_id));
    }

    // 高亮支撑的形式点，其他变暗
    document.querySelectorAll('.form-card').forEach(card => {
        const cardId = card.getAttribute('data-id');
        if (supportingForms.has(cardId)) {
            card.classList.add('highlighted');
            card.classList.remove('dimmed');
        } else {
            card.classList.add('dimmed');
            card.classList.remove('highlighted');
        }
    });

    // 绘制反向支撑关系
    drawReverseFormSupportRelationships(fullTargetId, relations);
}

// 绘制形式点支撑关系（形式点 → 目标点）
function drawFormSupportRelationships(formId, relations) {
    const canvas = document.getElementById('form-support-canvas');
    if (!canvas) return;

    // 清空并移除占位文本
    const placeholder = canvas.querySelector('.placeholder-text');
    if (placeholder) {
        placeholder.style.display = 'none';
    }

    // 创建可视化内容
    let html = '<div class="support-flow">\n';
    html += '<div class="flow-title">支撑关系</div>\n';

    // 显示来源形式点
    html += '<div class="flow-source">\n';
    html += '<div class="flow-node form-flow-node">\n';
    html += `<div class="flow-node-label">${relations.type || '形式点'}</div>\n`;
    html += `<div class="flow-node-name">${relations.name || formId}</div>\n`;
    html += '</div>\n';
    html += '</div>\n';

    // 显示支撑的目标点（分类）
    html += '<div class="flow-targets">\n';

    if (relations.inspiration && relations.inspiration.length > 0) {
        html += '<div class="flow-target-group">\n';
        html += '<div class="flow-target-label">灵感点</div>\n';
        relations.inspiration.forEach(rel => {
            html += `<div class="flow-target-item inspiration-flow">\n`;
            html += `<div class="flow-target-text">${rel.point}</div>\n`;
            // 兼容新结构（支撑理由）和旧结构（相似度分数）
            if (rel.support_reason !== undefined) {
                html += `<div class="flow-target-score">支撑</div>\n`;
            } else if (rel.avg_score !== undefined) {
                const score = (rel.avg_score * 100).toFixed(0);
                html += `<div class="flow-target-score">相似度: ${score}%</div>\n`;
            }
            html += '</div>\n';
        });
        html += '</div>\n';
    }

    if (relations.purpose && relations.purpose.length > 0) {
        html += '<div class="flow-target-group">\n';
        html += '<div class="flow-target-label">目的点</div>\n';
        relations.purpose.forEach(rel => {
            html += `<div class="flow-target-item purpose-flow">\n`;
            html += `<div class="flow-target-text">${rel.point}</div>\n`;
            // 兼容新结构（支撑理由）和旧结构（相似度分数）
            if (rel.support_reason !== undefined) {
                html += `<div class="flow-target-score">支撑</div>\n`;
            } else if (rel.avg_score !== undefined) {
                const score = (rel.avg_score * 100).toFixed(0);
                html += `<div class="flow-target-score">相似度: ${score}%</div>\n`;
            }
            html += '</div>\n';
        });
        html += '</div>\n';
    }

    if (relations.keypoint && relations.keypoint.length > 0) {
        html += '<div class="flow-target-group">\n';
        html += '<div class="flow-target-label">关键点</div>\n';
        relations.keypoint.forEach(rel => {
            html += `<div class="flow-target-item keypoint-flow">\n`;
            html += `<div class="flow-target-text">${rel.point}</div>\n`;
            // 兼容新结构（支撑理由）和旧结构（相似度分数）
            if (rel.support_reason !== undefined) {
                html += `<div class="flow-target-score">支撑</div>\n`;
            } else if (rel.avg_score !== undefined) {
                const score = (rel.avg_score * 100).toFixed(0);
                html += `<div class="flow-target-score">相似度: ${score}%</div>\n`;
            }
            html += '</div>\n';
        });
        html += '</div>\n';
    }

    if (relations.substance && relations.substance.length > 0) {
        html += '<div class="flow-target-group">\n';
        html += '<div class="flow-target-label">实质点</div>\n';
        relations.substance.forEach(rel => {
            const score = (rel.avg_score * 100).toFixed(0);
            let flowClass = '';
            if (rel.type === '具体元素') {
                flowClass = 'concrete-element-flow';
            } else if (rel.type === '具体概念') {
                flowClass = 'concrete-concept-flow';
            } else if (rel.type === '抽象概念') {
                flowClass = 'abstract-concept-flow';
            }
            html += `<div class="flow-target-item ${flowClass}">\n`;
            html += `<div class="flow-target-text">${rel.name} <span style="font-size:0.8em;color:#6c757d;">(${rel.type})</span></div>\n`;
            html += `<div class="flow-target-score">相似度: ${score}%</div>\n`;
            html += '</div>\n';
        });
        html += '</div>\n';
    }

    html += '</div>\n';
    html += '</div>\n';

    // 插入到画布
    canvas.insertAdjacentHTML('beforeend', html);
}

// 绘制反向形式点支撑关系（目标点 ← 形式点）
function drawReverseFormSupportRelationships(targetId, relations) {
    const canvas = document.getElementById('form-support-canvas');
    if (!canvas) return;

    // 清空并移除占位文本
    const placeholder = canvas.querySelector('.placeholder-text');
    if (placeholder) {
        placeholder.style.display = 'none';
    }

    // 创建可视化内容
    let html = '<div class="support-flow reverse">\n';
    html += '<div class="flow-title">被以下形式点支撑</div>\n';

    // 显示目标点
    html += '<div class="flow-source">\n';
    html += '<div class="flow-node target-flow-node">\n';
    html += `<div class="flow-node-label">目标点</div>\n`;
    html += `<div class="flow-node-name">${targetId}</div>\n`;
    html += '</div>\n';
    html += '</div>\n';

    // 显示支撑的形式点（分类）
    html += '<div class="flow-targets">\n';

    if (relations.concrete_element_forms && relations.concrete_element_forms.length > 0) {
        html += '<div class="flow-target-group">\n';
        html += '<div class="flow-target-label">具体元素形式</div>\n';
        relations.concrete_element_forms.forEach(item => {
            const score = (item.score * 100).toFixed(0);
            html += `<div class="flow-target-item concrete-element-form-flow">\n`;
            html += `<div class="flow-target-text">${item.name}</div>\n`;
            html += `<div class="flow-target-score">相似度: ${score}%</div>\n`;
            html += '</div>\n';
        });
        html += '</div>\n';
    }

    if (relations.concrete_concept_forms && relations.concrete_concept_forms.length > 0) {
        html += '<div class="flow-target-group">\n';
        html += '<div class="flow-target-label">具体概念形式</div>\n';
        relations.concrete_concept_forms.forEach(item => {
            const score = (item.score * 100).toFixed(0);
            html += `<div class="flow-target-item concrete-concept-form-flow">\n`;
            html += `<div class="flow-target-text">${item.name}</div>\n`;
            html += `<div class="flow-target-score">相似度: ${score}%</div>\n`;
            html += '</div>\n';
        });
        html += '</div>\n';
    }

    if (relations.overall_forms && relations.overall_forms.length > 0) {
        html += '<div class="flow-target-group">\n';
        html += '<div class="flow-target-label">整体形式</div>\n';
        relations.overall_forms.forEach(item => {
            const score = (item.score * 100).toFixed(0);
            html += `<div class="flow-target-item overall-form-flow">\n`;
            html += `<div class="flow-target-text">${item.name}</div>\n`;
            html += `<div class="flow-target-score">相似度: ${score}%</div>\n`;
            html += '</div>\n';
        });
        html += '</div>\n';
    }

    if (relations.forms && relations.forms.length > 0) {
        html += '<div class="flow-target-group">\n';
        html += '<div class="flow-target-label">形式点</div>\n';
        relations.forms.forEach(item => {
            const score = (item.score * 100).toFixed(0);
            html += `<div class="flow-target-item form-flow">\n`;
            html += `<div class="flow-target-text">${item.name} <span style="font-size:0.8em;color:#6c757d;">(${item.type})</span></div>\n`;
            html += `<div class="flow-target-score">相似度: ${score}%</div>\n`;
            html += '</div>\n';
        });
        html += '</div>\n';
    }

    html += '</div>\n';
    html += '</div>\n';

    // 插入到画布
    canvas.insertAdjacentHTML('beforeend', html);
}

// 清空形式点支撑关系画布
function clearFormSupportCanvas() {
    const canvas = document.getElementById('form-support-canvas');
    if (!canvas) return;

    // 移除所有flow相关元素
    const flows = canvas.querySelectorAll('.support-flow');
    flows.forEach(flow => flow.remove());

    // 重新显示占位文本
    const placeholder = canvas.querySelector('.placeholder-text');
    if (placeholder) {
        placeholder.style.display = 'flex';
    }
}

// ===== Tab5 连线绘制功能 =====

// 绘制Tab5所有连线
function drawFormAllConnections() {
    if (typeof tab5Relationships === 'undefined') {
        console.log('tab5Relationships not defined, skipping connection drawing');
        return;
    }

    const svg = document.getElementById('tab5-connection-svg');
    if (!svg) {
        console.log('SVG container not found');
        return;
    }

    // 清空现有连线
    svg.innerHTML = '';

    // 1. 绘制左侧选题点到实质点的连线（反向关系）
    drawLeftTargetToSubstanceConnections(svg);

    // 2. 绘制实质点到形式点的连线（支撑关系）
    drawSubstanceToFormConnections(svg);

    // 3. 绘制形式点到右侧选题点的连线
    drawFormToRightTargetConnections(svg);
}

// 绘制左侧选题点到实质点的连线
function drawLeftTargetToSubstanceConnections(svg) {
    const targetFromSubstance = tab5Relationships.target_from_substance;
    
    Object.keys(targetFromSubstance).forEach(targetId => {
        const substances = targetFromSubstance[targetId];
        
        substances.forEach(substanceData => {
            const sourceCard = document.querySelector(`.tab5-left-targets .target-card[data-id="${targetId}"]`);
            const targetCard = document.querySelector(`.tab5-substances .substance-card[data-id="${substanceData.substance_id}"]`);
            
            if (sourceCard && targetCard && !sourceCard.classList.contains('hidden') && !targetCard.classList.contains('hidden')) {
                drawTab5Connection(
                    svg,
                    sourceCard,
                    targetCard,
                    'left-target-substance',
                    targetId,
                    substanceData.substance_id,
                    {
                        score: substanceData.score,
                        substanceName: substanceData.name,
                        type: substanceData.type
                    }
                );
            }
        });
    });
}

// 绘制实质点到形式点的连线
function drawSubstanceToFormConnections(svg) {
    const formToSubstance = tab5Relationships.form_to_substance;
    
    Object.keys(formToSubstance).forEach(formId => {
        const substances = formToSubstance[formId];
        
        substances.forEach(substanceData => {
            const sourceCard = document.querySelector(`.tab5-substances .substance-card[data-id="${substanceData.substance_id}"]`);
            const targetCard = document.querySelector(`.tab5-forms .form-card[data-id="${formId}"]`);
            
            if (sourceCard && targetCard && !sourceCard.classList.contains('hidden') && !targetCard.classList.contains('hidden')) {
                drawTab5Connection(
                    svg,
                    sourceCard,
                    targetCard,
                    'substance-form',
                    substanceData.substance_id,
                    formId,
                    {
                        substanceName: substanceData.name,
                        formName: tab5Relationships.form_to_target[formId]?.name || ''
                    }
                );
            }
        });
    });
}

// 绘制形式点到右侧选题点的连线
function drawFormToRightTargetConnections(svg) {
    const formToTarget = tab5Relationships.form_to_target;
    
    Object.keys(formToTarget).forEach(formId => {
        const relations = formToTarget[formId];
        
        // 绘制到灵感点的连线
        relations.inspiration.forEach(rel => {
            const sourceCard = document.querySelector(`.tab5-forms .form-card[data-id="${formId}"]`);
            const targetCard = document.querySelector(`.tab5-right-targets .target-card[data-id="${rel.target_id}"]`);
            
            if (sourceCard && targetCard && !sourceCard.classList.contains('hidden') && !targetCard.classList.contains('hidden')) {
                // 兼容新结构（支撑）和旧结构（相似度分数）
                const score = rel.avg_score !== undefined ? rel.avg_score : (rel.support_reason !== undefined ? 1.0 : 0.5);
                drawTab5Connection(
                    svg,
                    sourceCard,
                    targetCard,
                    'form-inspiration',
                    formId,
                    rel.target_id,
                    {
                        score: score,
                        point: rel.point,
                        formName: relations.name
                    }
                );
            }
        });
        
        // 绘制到目的点的连线
        relations.purpose.forEach(rel => {
            const sourceCard = document.querySelector(`.tab5-forms .form-card[data-id="${formId}"]`);
            const targetCard = document.querySelector(`.tab5-right-targets .target-card[data-id="${rel.target_id}"]`);
            
            if (sourceCard && targetCard && !sourceCard.classList.contains('hidden') && !targetCard.classList.contains('hidden')) {
                // 兼容新结构（支撑）和旧结构（相似度分数）
                const score = rel.avg_score !== undefined ? rel.avg_score : (rel.support_reason !== undefined ? 1.0 : 0.5);
                drawTab5Connection(
                    svg,
                    sourceCard,
                    targetCard,
                    'form-purpose',
                    formId,
                    rel.target_id,
                    {
                        score: score,
                        point: rel.point,
                        formName: relations.name
                    }
                );
            }
        });
        
        // 绘制到关键点的连线
        relations.keypoint.forEach(rel => {
            const sourceCard = document.querySelector(`.tab5-forms .form-card[data-id="${formId}"]`);
            const targetCard = document.querySelector(`.tab5-right-targets .target-card[data-id="${rel.target_id}"]`);
            
            if (sourceCard && targetCard && !sourceCard.classList.contains('hidden') && !targetCard.classList.contains('hidden')) {
                // 兼容新结构（支撑）和旧结构（相似度分数）
                const score = rel.avg_score !== undefined ? rel.avg_score : (rel.support_reason !== undefined ? 1.0 : 0.5);
                drawTab5Connection(
                    svg,
                    sourceCard,
                    targetCard,
                    'form-keypoint',
                    formId,
                    rel.target_id,
                    {
                        score: score,
                        point: rel.point,
                        formName: relations.name
                    }
                );
            }
        });
    });
}

// 绘制单条Tab5连线
function drawTab5Connection(svg, sourceCard, targetCard, connectionType, sourceId, targetId, metadata) {
    const svgContainer = svg.parentElement;
    const containerRect = svgContainer.getBoundingClientRect();
    const sourceRect = sourceCard.getBoundingClientRect();
    const targetRect = targetCard.getBoundingClientRect();
    
    // 计算连线起点和终点
    let x1, y1, x2, y2;
    
    if (connectionType === 'left-target-substance') {
        // 左侧选题点到实质点：从右边连到左边
        x1 = sourceRect.right - containerRect.left;
        y1 = sourceRect.top + sourceRect.height / 2 - containerRect.top;
        x2 = targetRect.left - containerRect.left;
        y2 = targetRect.top + targetRect.height / 2 - containerRect.top;
    } else if (connectionType === 'substance-form') {
        // 实质点到形式点：从右边连到左边
        x1 = sourceRect.right - containerRect.left;
        y1 = sourceRect.top + sourceRect.height / 2 - containerRect.top;
        x2 = targetRect.left - containerRect.left;
        y2 = targetRect.top + targetRect.height / 2 - containerRect.top;
    } else {
        // 形式点到右侧选题点：从右边连到左边
        x1 = sourceRect.right - containerRect.left;
        y1 = sourceRect.top + sourceRect.height / 2 - containerRect.top;
        x2 = targetRect.left - containerRect.left;
        y2 = targetRect.top + targetRect.height / 2 - containerRect.top;
    }
    
    // 创建贝塞尔曲线路径
    const midX = (x1 + x2) / 2;
    const path = `M ${x1} ${y1} Q ${midX} ${y1}, ${midX} ${(y1 + y2) / 2} T ${x2} ${y2}`;
    
    // 创建path元素
    const pathElement = document.createElementNS('http://www.w3.org/2000/svg', 'path');
    pathElement.setAttribute('d', path);
    pathElement.setAttribute('class', `tab5-connection-line ${connectionType}`);
    pathElement.setAttribute('fill', 'none');
    pathElement.setAttribute('stroke-width', '2');
    pathElement.setAttribute('data-source-id', sourceId);
    pathElement.setAttribute('data-target-id', targetId);
    pathElement.setAttribute('data-connection-type', connectionType);
    
    // 保存元数据以供点击时使用
    pathElement.setAttribute('data-metadata', JSON.stringify(metadata));
    
    // 添加点击事件
    pathElement.style.cursor = 'pointer';
    pathElement.addEventListener('click', function(e) {
        e.stopPropagation();
        showConnectionDetail(connectionType, sourceId, targetId, metadata);
    });
    
    // 添加hover效果
    pathElement.addEventListener('mouseenter', function() {
        this.setAttribute('stroke-width', '4');
        this.style.filter = 'drop-shadow(0 0 6px rgba(0,0,0,0.3))';
    });
    
    pathElement.addEventListener('mouseleave', function() {
        this.setAttribute('stroke-width', '2');
        this.style.filter = 'none';
    });
    
    svg.appendChild(pathElement);
}

// 显示连线详情模态框
function showConnectionDetail(connectionType, sourceId, targetId, metadata) {
    // 创建模态框
    const modal = document.createElement('div');
    modal.className = 'connection-modal-backdrop';
    modal.onclick = function(e) {
        if (e.target === modal) {
            document.body.removeChild(modal);
        }
    };
    
    // 创建模态框内容
    const modalContent = document.createElement('div');
    modalContent.className = 'connection-modal-content';
    modalContent.onclick = function(e) {
        e.stopPropagation();
    };
    
    // 构建内容
    let html = '<div class="modal-header">';
    html += '<h3>连线关系详情</h3>';
    html += '<button class="modal-close" onclick="this.closest(\'.connection-modal-backdrop\').remove()">×</button>';
    html += '</div>';
    
    html += '<div class="modal-body">';
    
    // 根据连接类型显示不同内容
    if (connectionType === 'left-target-substance') {
        html += '<div class="connection-detail-section">';
        html += '<div class="connection-label">连接类型：</div>';
        html += '<div class="connection-value">选题点 → 实质点</div>';
        html += '</div>';
        
        html += '<div class="connection-detail-section">';
        html += '<div class="connection-label">实质点：</div>';
        html += '<div class="connection-value">' + (metadata.substanceName || sourceId) + '</div>';
        html += '</div>';
        
        html += '<div class="connection-detail-section">';
        html += '<div class="connection-label">实质点类型：</div>';
        html += '<div class="connection-value">' + (metadata.type || '-') + '</div>';
        html += '</div>';
        
        if (metadata.score !== undefined) {
            const scorePercent = (metadata.score * 100).toFixed(1);
            html += '<div class="connection-detail-section">';
            html += '<div class="connection-label">相似度评分：</div>';
            html += '<div class="connection-value score-value">' + scorePercent + '%</div>';
            html += '</div>';
        }
        
        html += '<div class="connection-detail-section">';
        html += '<div class="connection-label">说明：</div>';
        html += '<div class="connection-value">该实质点支撑了这个选题点的内容，相似度越高表示关联性越强</div>';
        html += '</div>';
        
    } else if (connectionType === 'substance-form') {
        html += '<div class="connection-detail-section">';
        html += '<div class="connection-label">连接类型：</div>';
        html += '<div class="connection-value">实质点 → 形式点</div>';
        html += '</div>';
        
        html += '<div class="connection-detail-section">';
        html += '<div class="connection-label">实质点：</div>';
        html += '<div class="connection-value">' + (metadata.substanceName || sourceId) + '</div>';
        html += '</div>';
        
        html += '<div class="connection-detail-section">';
        html += '<div class="connection-label">形式点：</div>';
        html += '<div class="connection-value">' + (metadata.formName || targetId) + '</div>';
        html += '</div>';
        
        html += '<div class="connection-detail-section">';
        html += '<div class="connection-label">说明：</div>';
        html += '<div class="connection-value">该形式点是对实质点的具体表现形式</div>';
        html += '</div>';
        
    } else if (connectionType.startsWith('form-')) {
        const targetType = connectionType.split('-')[1]; // inspiration, purpose, keypoint
        const targetTypeLabel = {
            'inspiration': '灵感点',
            'purpose': '目的点',
            'keypoint': '关键点'
        }[targetType] || targetType;
        
        html += '<div class="connection-detail-section">';
        html += '<div class="connection-label">连接类型：</div>';
        html += '<div class="connection-value">形式点 → ' + targetTypeLabel + '</div>';
        html += '</div>';
        
        html += '<div class="connection-detail-section">';
        html += '<div class="connection-label">形式点：</div>';
        html += '<div class="connection-value">' + (metadata.formName || sourceId) + '</div>';
        html += '</div>';
        
        if (metadata.point) {
            html += '<div class="connection-detail-section">';
            html += '<div class="connection-label">' + targetTypeLabel + '：</div>';
            html += '<div class="connection-value">' + metadata.point + '</div>';
            html += '</div>';
        }
        
        if (metadata.score !== undefined) {
            const scorePercent = (metadata.score * 100).toFixed(1);
            html += '<div class="connection-detail-section">';
            html += '<div class="connection-label">相似度评分：</div>';
            html += '<div class="connection-value score-value">' + scorePercent + '%</div>';
            html += '</div>';
        }
        
        html += '<div class="connection-detail-section">';
        html += '<div class="connection-label">说明：</div>';
        html += '<div class="connection-value">该形式点支撑了这个选题点的呈现，相似度越高表示形式与选题的契合度越高</div>';
        html += '</div>';
    }
    
    html += '</div>';
    
    modalContent.innerHTML = html;
    modal.appendChild(modalContent);
    document.body.appendChild(modal);
}