jc-wangh20
/
OnlineEducation-teacher-front


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>知识点学习情况分析</title>
    <!-- 引入Chart.js -->
    <script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Microsoft YaHei', Arial, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            padding: 20px;
        }

        .container {
            max-width: 1400px;
            margin: 0 auto;
            background: white;
            border-radius: 15px;
            box-shadow: 0 20px 40px rgba(0,0,0,0.1);
            overflow: hidden;
        }

        header {
            background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
            color: white;
            padding: 20px;
            text-align: center;
        }

        h1 {
            font-size: 28px;
            margin-bottom: 10px;
        }

        .subtitle {
            font-size: 16px;
            opacity: 0.9;
        }

        .content {
            display: flex;
			//height : 950px;
            //height: calc(100vh - 120px);
        }

        #chartContainer {
            flex: 1;
            padding: 30px;
            border-right: 1px solid #eee;
        }

        #listContainer {
            flex: 1;
            padding: 30px;
            display: flex;
            flex-direction: column;
        }

        .chart-title {
            font-size: 20px;
            color: #333;
            margin-bottom: 20px;
            text-align: center;
        }

        .list-title {
            font-size: 20px;
            color: #333;
            margin-bottom: 20px;
            text-align: center;
        }

        /* 修复柱形图容器，避免变形 */
        .chart-wrapper {
            position: relative;
            width: 100%;
            height: 400px;
        }

        canvas {
            width: 100% !important;
            height: 100% !important;
            max-width: 100%;
        }

        table {
            width: 100%;
            border-collapse: collapse;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            border-radius: 10px;
            overflow: hidden;
        }

        th {
            background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
            color: white;
            text-align: left;
            padding: 15px;
            font-weight: 600;
            font-size: 14px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        td {
            padding: 12px 15px;
            border-bottom: 1px solid #eee;
            color: #555;
        }

        tr:hover {
            background-color: #f8f9ff;
            transform: translateY(-1px);
            transition: all 0.3s ease;
        }

        tbody tr:last-child td {
            border-bottom: none;
        }

        .no-data {
            text-align: center;
            padding: 40px;
            color: #999;
            font-style: italic;
        }

        .chartjs-tooltip {
            background: rgba(0, 0, 0, 0.8) !important;
            border: none !important;
            border-radius: 8px !important;
            padding: 10px !important;
            color: white !important;
            font-size: 14px !important;
        }

        .selected-knowledge {
            background: #f0f8ff;
            padding: 15px;
            border-radius: 10px;
            margin-bottom: 20px;
            text-align: center;
            font-weight: 600;
            color: #4facfe;
            border: 2px dashed #4facfe;
        }

        /* 分页样式 */
        .pagination {
            display: flex;
            justify-content: center;
            margin-top: 20px;
            gap: 5px;
        }

        .pagination button {
            background: white;
            border: 1px solid #ddd;
            color: #333;
            padding: 8px 12px;
            cursor: pointer;
            border-radius: 4px;
            font-size: 14px;
            transition: all 0.3s ease;
        }

        .pagination button:hover {
            background: #f0f0f0;
            border-color: #999;
        }

        .pagination button.active {
            background: #4facfe;
            color: white;
            border-color: #4facfe;
        }

        .pagination button:disabled {
            background: #f5f5f5;
            color: #ccc;
            cursor: not-allowed;
        }

        .pagination-info {
            text-align: center;
            margin-top: 10px;
            color: #666;
            font-size: 14px;
        }

        @media (max-width: 768px) {
            .content {
                flex-direction: column;
            }

            #chartContainer {
                border-right: none;
                border-bottom: 1px solid #eee;
            }

            #listContainer {
                height: 400px;
            }

            .pagination button {
                padding: 6px 10px;
                font-size: 12px;
            }
        }
    </style>
</head>
<body>
    <div class="container">
        <header>
            <h1>知识点学习情况分析</h1>
            <div class="subtitle">实时监控学员学习进度与参与情况</div>
        </header>

        <div class="content">
            <!-- 左侧柱形图 -->
            <div id="chartContainer">
                <div class="chart-title">各知识点学习人数统计</div>
                <div class="chart-wrapper">
                    <canvas id="myChart"></canvas>
                </div>
            </div>

            <!-- 右侧列表 -->
            <div id="listContainer">
                <div class="list-title">学习人员名单</div>
                <div id="selectedKnowledge" class="selected-knowledge">
                    请选择左侧知识点查看学习人员
                </div>
                <div style="flex: 1; overflow-y: auto;">
                    <table id="studentTable">
                        <thead>
                            <tr>
                                <th>专业</th>
                                <th>班级</th>
                                <th>学号</th>
                                <th>姓名</th>
                            </tr>
                        </thead>
                        <tbody id="studentList">
                            <tr><td colspan="4" class="no-data">暂无数据</td></tr>
                        </tbody>
                    </table>
                </div>

                <!-- 分页控件 -->
                <div class="pagination-container">
                    <div class="pagination" id="pagination">
                        <!-- 分页按钮将通过JavaScript动态生成 -->
                    </div>
                    <div class="pagination-info" id="paginationInfo">
                        <!-- 分页信息将通过JavaScript动态生成 -->
                    </div>
                </div>
            </div>
        </div>
    </div>

    <script>
        // 示例数据
        const knowledgeData = {
            labels: ["电传操纵系统", "飞行控制律", "传感器技术", "故障诊断", "人机交互"],
            datasets: [{
                label: '学习人数',
                data: [32, 25, 41, 18, 29],
                backgroundColor: [
                    'rgba(255, 99, 132, 0.8)',
                    'rgba(54, 162, 235, 0.8)',
                    'rgba(255, 206, 86, 0.8)',
                    'rgba(75, 192, 192, 0.8)',
                    'rgba(153, 102, 255, 0.8)'
                ],
                borderColor: [
                    'rgba(255, 99, 132, 1)',
                    'rgba(54, 162, 235, 1)',
                    'rgba(255, 206, 86, 1)',
                    'rgba(75, 192, 192, 1)',
                    'rgba(153, 102, 255, 1)'
                ],
                borderWidth: 2,
                borderRadius: 8,
                borderSkipped: false
            }]
        };

        // 学员数据
        const studentData = [
            // 电传操纵系统
            [
                { major: "航空航天工程", class: "飞控1班", studentId: "2023001", name: "张三" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023002", name: "李四" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023003", name: "王五" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023004", name: "赵六" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023005", name: "钱七" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023006", name: "孙八" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023007", name: "周九" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023008", name: "吴十" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023009", name: "郑一" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023010", name: "王二" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023011", name: "冯三" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023012", name: "陈四" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023013", name: "褚五" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023014", name: "卫六" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023015", name: "蒋七" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023016", name: "沈八" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023017", name: "韩九" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023018", name: "杨十" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023019", name: "朱一" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023020", name: "秦二" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023021", name: "尤三" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023022", name: "许四" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023023", name: "何五" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023024", name: "吕六" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023025", name: "施七" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023026", name: "张八" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023027", name: "孔九" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023028", name: "曹十" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023029", name: "严一" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023030", name: "华二" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023031", name: "金三" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023032", name: "魏四" }
            ],
            // 飞行控制律
            [
                { major: "航空航天工程", class: "飞控1班", studentId: "2023033", name: "郑一" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023034", name: "王二" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023035", name: "冯三" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023036", name: "陈四" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023037", name: "褚五" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023038", name: "卫六" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023039", name: "蒋七" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023040", name: "沈八" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023041", name: "韩九" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023042", name: "杨十" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023043", name: "朱一" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023044", name: "秦二" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023045", name: "尤三" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023046", name: "许四" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023047", name: "何五" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023048", name: "吕六" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023049", name: "施七" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023050", name: "张八" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023051", name: "孔九" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023052", name: "曹十" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023053", name: "严一" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023054", name: "华二" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023055", name: "金三" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023056", name: "魏四" }
            ],
            // 传感器技术
            [
                { major: "航空航天工程", class: "飞控1班", studentId: "2023057", name: "蒋七" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023058", name: "沈八" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023059", name: "韩九" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023060", name: "杨十" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023061", name: "朱一" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023062", name: "秦二" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023063", name: "尤三" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023064", name: "许四" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023065", name: "何五" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023066", name: "吕六" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023067", name: "施七" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023068", name: "张八" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023069", name: "孔九" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023070", name: "曹十" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023071", name: "严一" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023072", name: "华二" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023073", name: "金三" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023074", name: "魏四" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023075", name: "张三" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023076", name: "李四" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023077", name: "王五" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023078", name: "赵六" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023079", name: "钱七" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023080", name: "孙八" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023081", name: "周九" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023082", name: "吴十" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023083", name: "郑一" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023084", name: "王二" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023085", name: "冯三" }
            ],
            // 故障诊断
            [
                { major: "航空航天工程", class: "飞控2班", studentId: "2023086", name: "尤三" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023087", name: "许四" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023088", name: "何五" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023089", name: "吕六" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023090", name: "施七" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023091", name: "张八" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023092", name: "孔九" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023093", name: "曹十" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023094", name: "严一" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023095", name: "华二" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023096", name: "金三" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023097", name: "魏四" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023098", name: "张三" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023099", name: "李四" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023100", name: "王五" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023101", name: "赵六" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023102", name: "钱七" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023103", name: "孙八" }
            ],
            // 人机交互
            [
                { major: "航空航天工程", class: "飞控1班", studentId: "2023104", name: "施七" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023105", name: "张八" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023106", name: "孔九" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023107", name: "曹十" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023108", name: "严一" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023109", name: "华二" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023110", name: "金三" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023111", name: "魏四" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023112", name: "张三" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023113", name: "李四" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023114", name: "王五" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023115", name: "赵六" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023116", name: "钱七" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023117", name: "孙八" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023118", name: "周九" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023119", name: "吴十" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023120", name: "郑一" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023121", name: "王二" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023122", name: "冯三" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023123", name: "陈四" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023124", name: "褚五" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023125", name: "卫六" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023126", name: "蒋七" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023127", name: "沈八" },
                { major: "航空航天工程", class: "飞控1班", studentId: "2023128", name: "韩九" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023129", name: "杨十" },
                { major: "航空航天工程", class: "飞控2班", studentId: "2023130", name: "朱一" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023131", name: "秦二" },
                { major: "航空航天工程", class: "飞控3班", studentId: "2023132", name: "尤三" }
            ]
        ];

        // 每页显示的项目数量
        const ITEMS_PER_PAGE = 10;

        // 当前分页信息
        let currentPage = 1;
        let totalPages = 1;
        let currentDataIndex = 0;

        // 创建柱形图
        const ctx = document.getElementById('myChart').getContext('2d');
        const myChart = new Chart(ctx, {
            type: 'bar',
            data: knowledgeData,
            options: {
                responsive: true,
                maintainAspectRatio: false,
                plugins: {
                    legend: {
                        display: false
                    },
                    tooltip: {
                        backgroundColor: 'rgba(0, 0, 0, 0.8)',
                        titleColor: 'white',
                        bodyColor: 'white',
                        borderColor: 'rgba(255, 255, 255, 0.3)',
                        borderWidth: 1,
                        cornerRadius: 8,
                        displayColors: false,
                        callbacks: {
                            label: function(context) {
                                return `学习人数: ${context.parsed.y}人`;
                            }
                        }
                    }
                },
                scales: {
                    y: {
                        beginAtZero: true,
                        ticks: {
                            stepSize: 5,
                            color: '#666',
                            font: {
                                size: 12,
                                family: 'Microsoft YaHei, Arial, sans-serif'
                            }
                        },
                        grid: {
                            color: 'rgba(0, 0, 0, 0.1)'
                        }
                    },
                    x: {
                        ticks: {
                            color: '#666',
                            font: {
                                size: 12,
                                family: 'Microsoft YaHei, Arial, sans-serif'
                            },
                            maxRotation: 45,
                            minRotation: 45
                        },
                        grid: {
                            display: false
                        }
                    }
                },
                onClick: (event, elements) => {
                    if (elements.length > 0) {
                        const index = elements[0].index;
                        currentDataIndex = index;
                        currentPage = 1; // 重置为第一页
                        updateStudentList(index, 1);

                        // 更新选中知识点显示
                        document.getElementById('selectedKnowledge').innerHTML =
                            `<strong>当前查看:</strong> ${knowledgeData.labels[index]}
                             <span style="color: #666; font-weight: normal;">(${knowledgeData.datasets[0].data[index]}人学习)</span>`;
                    }
                },
                interaction: {
                    intersect: false,
                    mode: 'index'
                }
            }
        });

        // 更新右侧列表（带分页）
        function updateStudentList(index, page = 1) {
            const listContainer = document.getElementById('studentList');
            const students = studentData[index];
            const paginationContainer = document.getElementById('pagination');
            const paginationInfo = document.getElementById('paginationInfo');

            if (students && students.length > 0) {
                // 计算分页
                totalPages = Math.ceil(students.length / ITEMS_PER_PAGE);
                currentPage = page;

                // 计算当前页的数据
                const startIndex = (page - 1) * ITEMS_PER_PAGE;
                const endIndex = Math.min(startIndex + ITEMS_PER_PAGE, students.length);
                const currentPageData = students.slice(startIndex, endIndex);

                // 清空列表并添加当前页数据
                listContainer.innerHTML = '';
                currentPageData.forEach(student => {
                    const tr = document.createElement('tr');
                    tr.innerHTML = `
                        <td>${student.major}</td>
                        <td>${student.class}</td>
                        <td>${student.studentId}</td>
                        <td>${student.name}</td>
                    `;
                    listContainer.appendChild(tr);
                });

                // 更新分页信息
                paginationInfo.textContent = `共 ${students.length} 条记录，第 ${page} 页，共 ${totalPages} 页`;

                // 生成分页按钮
                generatePaginationButtons();
            } else {
                listContainer.innerHTML = '<tr><td colspan="4" class="no-data">暂无学习人员</td></tr>';
                paginationContainer.innerHTML = '';
                paginationInfo.textContent = '';
            }
        }

        // 生成分页按钮
        function generatePaginationButtons() {
            const paginationContainer = document.getElementById('pagination');
            paginationContainer.innerHTML = '';

            // 上一页按钮
            const prevButton = document.createElement('button');
            prevButton.innerHTML = '&laquo;';
            prevButton.disabled = currentPage === 1;
            prevButton.addEventListener('click', () => {
                if (currentPage > 1) {
                    updateStudentList(currentDataIndex, currentPage - 1);
                }
            });
            paginationContainer.appendChild(prevButton);

            // 页码按钮（最多显示5个页码）
            const maxVisiblePages = 5;
            let startPage = Math.max(1, currentPage - Math.floor(maxVisiblePages / 2));
            let endPage = Math.min(totalPages, startPage + maxVisiblePages - 1);

            // 如果接近末尾，调整起始页
            if (endPage - startPage + 1 < maxVisiblePages) {
                startPage = Math.max(1, endPage - maxVisiblePages + 1);
            }

            for (let i = startPage; i <= endPage; i++) {
                const pageButton = document.createElement('button');
                pageButton.textContent = i;
                pageButton.classList.toggle('active', i === currentPage);
                pageButton.addEventListener('click', () => {
                    updateStudentList(currentDataIndex, i);
                });
                paginationContainer.appendChild(pageButton);
            }

            // 下一页按钮
            const nextButton = document.createElement('button');
            nextButton.innerHTML = '&raquo;';
            nextButton.disabled = currentPage === totalPages;
            nextButton.addEventListener('click', () => {
                if (currentPage < totalPages) {
                    updateStudentList(currentDataIndex, currentPage + 1);
                }
            });
            paginationContainer.appendChild(nextButton);
        }

        // 页面加载完成后，默认显示第一个知识点的人员列表
        window.addEventListener('load', function() {
            // 等待Chart.js完全渲染完成
            setTimeout(() => {
                // 默认选择第一个知识点
                const firstIndex = 0;
                currentDataIndex = firstIndex;
                currentPage = 1;
                updateStudentList(firstIndex, 1);

                // 更新选中知识点显示
                document.getElementById('selectedKnowledge').innerHTML =
                    `<strong>当前查看:</strong> ${knowledgeData.labels[firstIndex]}
                     <span style="color: #666; font-weight: normal;">(${knowledgeData.datasets[0].data[firstIndex]}人学习)</span>`;
            }, 100);
        });
    </script>
</body>
</html>