diff --git a/src/oj/class/pk.vue b/src/oj/class/pk.vue
index 982d25d..ed5ea68 100644
--- a/src/oj/class/pk.vue
+++ b/src/oj/class/pk.vue
@@ -1,885 +1,949 @@
-<script setup lang="ts">
-import { formatISO, sub, type Duration } from "date-fns"
-import { getClassPK } from "oj/api"
-import { useConfigStore } from "shared/store/config"
-import { Icon } from "@iconify/vue"
-import { Bar, Radar } from "vue-chartjs"
-import {
-  Chart as ChartJS,
-  CategoryScale,
-  LinearScale,
-  BarElement,
-  RadialLinearScale,
-  PointElement,
-  LineElement,
-  Title,
-  Tooltip,
-  Legend,
-  Colors,
-  Filler,
-} from "chart.js"
-
-// 注册Chart.js组件
-ChartJS.register(
-  CategoryScale,
-  LinearScale,
-  BarElement,
-  RadialLinearScale,
-  PointElement,
-  LineElement,
-  Title,
-  Tooltip,
-  Legend,
-  Colors,
-  Filler,
-)
-
-const configStore = useConfigStore()
-const message = useMessage()
-
-interface ClassComparison {
-  class_name: string
-  user_count: number
-  total_ac: number
-  total_submission: number
-  avg_ac: number
-  median_ac: number
-  q1_ac: number
-  q3_ac: number
-  iqr: number
-  std_dev: number
-  top_10_avg: number
-  bottom_10_avg: number
-  top_25_avg: number
-  bottom_25_avg: number
-  excellent_rate: number
-  pass_rate: number
-  active_rate: number
-  ac_rate: number
-  recent_total_ac?: number
-  recent_avg_ac?: number
-  recent_median_ac?: number
-  recent_top_10_avg?: number
-  recent_active_count?: number
-}
-
-const selectedClasses = ref<string[]>([])
-const comparisons = ref<ClassComparison[]>([])
-const duration = ref<string>("")
-const loading = ref(false)
-const hasTimeRange = ref(false)
-
-// 时间段选项（与 rank/list.vue 保持一致）
-const timeRangeOptions: SelectOption[] = [
-  { label: "全部时间", value: "" },
-  { label: "一周内", value: "weeks:1" },
-  { label: "一个月内", value: "months:1" },
-  { label: "两个月内", value: "months:2" },
-  { label: "半年内", value: "months:6" },
-  { label: "一年内", value: "years:1" },
-]
-
-// 计算时间段（与 rank/list.vue 保持一致）
-const subOptions = computed<Duration | null>(() => {
-  if (!duration.value || duration.value === "") {
-    return null
-  }
-  const dur = timeRangeOptions.find((it) => it.value === duration.value)
-  if (!dur || !dur.value || dur.value === "") {
-    return null
-  }
-  const x = dur.value.toString().split(":")
-  const unit = x[0]
-  const n = x[1]
-  return { [unit]: parseInt(n) } as Duration
-})
-
-// 根据时间段选项计算开始和结束时间
-function getTimeRange(): {
-  startTime?: string
-  endTime?: string
-} {
-  if (!duration.value || duration.value === "" || !subOptions.value) {
-    return {}
-  }
-
-  const current = Date.now()
-  const startTime = formatISO(sub(current, subOptions.value))
-  const endTime = formatISO(current)
-
-  return {
-    startTime,
-    endTime,
-  }
-}
-
-const classOptions = computed(() => {
-  return (
-    configStore.config?.class_list.map((item) => ({
-      label: `${item.slice(0, 2)}计算机${item.slice(2)}班`,
-      value: item,
-    })) ?? []
-  )
-})
-
-async function compare() {
-  if (selectedClasses.value.length < 2) {
-    message.warning("请至少选择2个班级")
-    return
-  }
-
-  loading.value = true
-  try {
-    const { startTime, endTime } = getTimeRange()
-
-    const res = await getClassPK(selectedClasses.value, startTime, endTime)
-    comparisons.value = res.data.comparisons
-    hasTimeRange.value = res.data.has_time_range || false
-  } catch (error) {
-    message.error("获取数据失败")
-  } finally {
-    loading.value = false
-  }
-}
-
-// 计算排名颜色
-function getRankColor(index: number) {
-  if (index === 0) return { type: "success" as const, text: "🥇" }
-  if (index === 1) return { type: "info" as const, text: "🥈" }
-  if (index === 2) return { type: "warning" as const, text: "🥉" }
-  return { type: "default" as const, text: `${index + 1}` }
-}
-
-// 获取班级颜色
-function getClassColor(index: number) {
-  const colors = [
-    { bg: "rgba(24, 160, 88, 0.2)", border: "rgba(24, 160, 88, 0.8)" }, // success
-    { bg: "rgba(32, 128, 240, 0.2)", border: "rgba(32, 128, 240, 0.8)" }, // info
-    { bg: "rgba(240, 160, 32, 0.2)", border: "rgba(240, 160, 32, 0.8)" }, // warning
-    { bg: "rgba(208, 48, 80, 0.2)", border: "rgba(208, 48, 80, 0.8)" }, // error
-    { bg: "rgba(128, 90, 213, 0.2)", border: "rgba(128, 90, 213, 0.8)" }, // purple
-    { bg: "rgba(0, 184, 148, 0.2)", border: "rgba(0, 184, 148, 0.8)" }, // teal
-  ]
-  return colors[index % colors.length]
-}
-
-// 总AC数对比图 - 每个班级用不同颜色
-const totalAcChartData = computed(() => {
-  if (comparisons.value.length === 0) return null
-
-  const labels = comparisons.value.map((c) => c.class_name)
-  const datasets = [
-    {
-      label: "总AC数",
-      data: comparisons.value.map((c) => c.total_ac),
-      backgroundColor: comparisons.value.map((_, i) => getClassColor(i).bg),
-      borderColor: comparisons.value.map((_, i) => getClassColor(i).border),
-      borderWidth: 2,
-    },
-  ]
-
-  return { labels, datasets }
-})
-
-// 平均AC数对比图
-const avgAcChartData = computed(() => {
-  if (comparisons.value.length === 0) return null
-
-  const labels = comparisons.value.map((c) => c.class_name)
-  const datasets = [
-    {
-      label: "平均AC数",
-      data: comparisons.value.map((c) => c.avg_ac),
-      backgroundColor: comparisons.value.map((_, i) => getClassColor(i).bg),
-      borderColor: comparisons.value.map((_, i) => getClassColor(i).border),
-      borderWidth: 2,
-    },
-  ]
-
-  return { labels, datasets }
-})
-
-// 中位数AC数对比图
-const medianAcChartData = computed(() => {
-  if (comparisons.value.length === 0) return null
-
-  const labels = comparisons.value.map((c) => c.class_name)
-  const datasets = [
-    {
-      label: "中位数AC数",
-      data: comparisons.value.map((c) => c.median_ac),
-      backgroundColor: comparisons.value.map((_, i) => getClassColor(i).bg),
-      borderColor: comparisons.value.map((_, i) => getClassColor(i).border),
-      borderWidth: 2,
-    },
-  ]
-
-  return { labels, datasets }
-})
-
-// 优秀率对比图
-const excellentRateChartData = computed(() => {
-  if (comparisons.value.length === 0) return null
-
-  const labels = comparisons.value.map((c) => c.class_name)
-  const datasets = [
-    {
-      label: "优秀率",
-      data: comparisons.value.map((c) => c.excellent_rate),
-      backgroundColor: comparisons.value.map((_, i) => getClassColor(i).bg),
-      borderColor: comparisons.value.map((_, i) => getClassColor(i).border),
-      borderWidth: 2,
-    },
-  ]
-
-  return { labels, datasets }
-})
-
-// 及格率对比图
-const passRateChartData = computed(() => {
-  if (comparisons.value.length === 0) return null
-
-  const labels = comparisons.value.map((c) => c.class_name)
-  const datasets = [
-    {
-      label: "及格率",
-      data: comparisons.value.map((c) => c.pass_rate),
-      backgroundColor: comparisons.value.map((_, i) => getClassColor(i).bg),
-      borderColor: comparisons.value.map((_, i) => getClassColor(i).border),
-      borderWidth: 2,
-    },
-  ]
-
-  return { labels, datasets }
-})
-
-// 参与度对比图
-const activeRateChartData = computed(() => {
-  if (comparisons.value.length === 0) return null
-
-  const labels = comparisons.value.map((c) => c.class_name)
-  const datasets = [
-    {
-      label: "参与度",
-      data: comparisons.value.map((c) => c.active_rate),
-      backgroundColor: comparisons.value.map((_, i) => getClassColor(i).bg),
-      borderColor: comparisons.value.map((_, i) => getClassColor(i).border),
-      borderWidth: 2,
-    },
-  ]
-
-  return { labels, datasets }
-})
-
-// 前10名平均对比图
-const top10AvgChartData = computed(() => {
-  if (comparisons.value.length === 0) return null
-
-  const labels = comparisons.value.map((c) => c.class_name)
-  const datasets = [
-    {
-      label: "前10名平均",
-      data: comparisons.value.map((c) => c.top_10_avg),
-      backgroundColor: comparisons.value.map((_, i) => getClassColor(i).bg),
-      borderColor: comparisons.value.map((_, i) => getClassColor(i).border),
-      borderWidth: 2,
-    },
-  ]
-
-  return { labels, datasets }
-})
-
-// 后10名平均对比图
-const bottom10AvgChartData = computed(() => {
-  if (comparisons.value.length === 0) return null
-
-  const labels = comparisons.value.map((c) => c.class_name)
-  const datasets = [
-    {
-      label: "后10名平均",
-      data: comparisons.value.map((c) => c.bottom_10_avg),
-      backgroundColor: comparisons.value.map((_, i) => getClassColor(i).bg),
-      borderColor: comparisons.value.map((_, i) => getClassColor(i).border),
-      borderWidth: 2,
-    },
-  ]
-
-  return { labels, datasets }
-})
-
-// 前25%平均对比图
-const top25AvgChartData = computed(() => {
-  if (comparisons.value.length === 0) return null
-
-  const labels = comparisons.value.map((c) => c.class_name)
-  const datasets = [
-    {
-      label: "前25%平均",
-      data: comparisons.value.map((c) => c.top_25_avg),
-      backgroundColor: comparisons.value.map((_, i) => getClassColor(i).bg),
-      borderColor: comparisons.value.map((_, i) => getClassColor(i).border),
-      borderWidth: 2,
-    },
-  ]
-
-  return { labels, datasets }
-})
-
-// 后25%平均对比图
-const bottom25AvgChartData = computed(() => {
-  if (comparisons.value.length === 0) return null
-
-  const labels = comparisons.value.map((c) => c.class_name)
-  const datasets = [
-    {
-      label: "后25%平均",
-      data: comparisons.value.map((c) => c.bottom_25_avg),
-      backgroundColor: comparisons.value.map((_, i) => getClassColor(i).bg),
-      borderColor: comparisons.value.map((_, i) => getClassColor(i).border),
-      borderWidth: 2,
-    },
-  ]
-
-  return { labels, datasets }
-})
-
-// 雷达图数据 - 多维度综合对比
-const radarChartData = computed(() => {
-  if (comparisons.value.length === 0) return null
-
-  // 归一化数据到0-100范围
-  const normalize = (value: number, max: number, min: number) => {
-    if (max === min) return 50
-    return ((value - min) / (max - min)) * 100
-  }
-
-  const metrics = [
-    "总AC数",
-    "平均AC数",
-    "中位数AC数",
-    "优秀率",
-    "及格率",
-    "参与度",
-  ]
-
-  // 计算每个指标的最大最小值
-  const maxValues = [
-    Math.max(...comparisons.value.map((c) => c.total_ac)),
-    Math.max(...comparisons.value.map((c) => c.avg_ac)),
-    Math.max(...comparisons.value.map((c) => c.median_ac)),
-    100, // 优秀率最大值
-    100, // 及格率最大值
-    100, // 参与度最大值
-  ]
-
-  const minValues = [
-    Math.min(...comparisons.value.map((c) => c.total_ac)),
-    Math.min(...comparisons.value.map((c) => c.avg_ac)),
-    Math.min(...comparisons.value.map((c) => c.median_ac)),
-    0,
-    0,
-    0,
-  ]
-
-  const datasets = comparisons.value.map((c, index) => {
-    const color = getClassColor(index)
-    return {
-      label: c.class_name,
-      data: [
-        normalize(c.total_ac, maxValues[0], minValues[0]),
-        normalize(c.avg_ac, maxValues[1], minValues[1]),
-        normalize(c.median_ac, maxValues[2], minValues[2]),
-        c.excellent_rate,
-        c.pass_rate,
-        c.active_rate,
-      ],
-      backgroundColor: color.bg,
-      borderColor: color.border,
-      borderWidth: 2,
-      pointBackgroundColor: color.border,
-      pointBorderColor: "#fff",
-      pointHoverBackgroundColor: "#fff",
-      pointHoverBorderColor: color.border,
-    }
-  })
-
-  return {
-    labels: metrics,
-    datasets,
-  }
-})
-
-// 图表配置 - 优化对比效果
-const chartOptions = {
-  responsive: true,
-  maintainAspectRatio: false,
-  plugins: {
-    legend: {
-      position: "bottom" as const,
-      display: true,
-      labels: {
-        boxWidth: 0,
-        padding: 10,
-      },
-    },
-    tooltip: {
-      mode: "index" as const,
-      intersect: false,
-      callbacks: {
-        label: function (context: any) {
-          let label = context.dataset.label || ""
-          if (label) {
-            label += ": "
-          }
-          if (context.parsed.y !== null) {
-            label += context.parsed.y.toFixed(2)
-          }
-          return label
-        },
-      },
-    },
-    datalabels: {
-      display: false,
-    },
-  },
-  scales: {
-    y: {
-      beginAtZero: true,
-      grid: {
-        display: true,
-        color: "rgba(0, 0, 0, 0.05)",
-      },
-    },
-    x: {
-      grid: {
-        display: false,
-      },
-    },
-  },
-}
-
-const radarChartOptions = {
-  responsive: true,
-  maintainAspectRatio: false,
-  plugins: {
-    legend: {
-      position: "bottom" as const,
-    },
-  },
-  scales: {
-    r: {
-      beginAtZero: true,
-      max: 100,
-      ticks: {
-        stepSize: 20,
-      },
-    },
-  },
-}
-</script>
-
-<template>
-  <n-card>
-    <n-flex vertical :size="20">
-      <n-h2 style="margin-bottom: 0">班级PK</n-h2>
-
-      <n-flex :wrap="false" align="flex-start" :size="16">
-        <n-form-item label="选择班级（至少2个）" style="width: 300px; margin-bottom: 0">
-          <n-select
-            v-model:value="selectedClasses"
-            :options="classOptions"
-            multiple
-            placeholder="选择要比较的班级"
-          />
-        </n-form-item>
-
-        <n-form-item label="时间段（可选）" style="width: 200px; margin-bottom: 0">
-          <n-select
-            v-model:value="duration"
-            :options="timeRangeOptions"
-            clearable
-            placeholder="选择时间段"
-            style="width: 100%"
-          />
-        </n-form-item>
-
-        <n-button type="primary" @click="compare" :loading="loading" style="margin-top: 26px">
-          开始PK
-        </n-button>
-      </n-flex>
-
-      <!-- 班级对比卡片 -->
-      <n-grid
-        v-if="comparisons.length > 0"
-        :cols="comparisons.length > 2 ? 2 : comparisons.length"
-        :x-gap="16"
-        :y-gap="16"
-      >
-        <n-gi v-for="(classData, index) in comparisons" :key="classData.class_name">
-          <n-card
-            :title="classData.class_name"
-            :bordered="true"
-            hoverable
-            :style="{
-              borderTop: `4px solid ${
-                getRankColor(index).type === 'success'
-                  ? '#18a058'
-                  : getRankColor(index).type === 'info'
-                    ? '#2080f0'
-                    : getRankColor(index).type === 'warning'
-                      ? '#f0a020'
-                      : '#d03050'
-              }`,
-            }"
-          >
-            <template #header-extra>
-              <n-tag :type="getRankColor(index).type" size="large">
-                {{ getRankColor(index).text }}
-              </n-tag>
-            </template>
-
-            <!-- 班级信息布局 - 优化为便于比较 -->
-            <n-flex vertical :size="12">
-              <!-- AC核心指标 - 突出显示，便于横向对比 -->
-              <n-grid :cols="5" :x-gap="8" responsive="screen">
-                <n-gi>
-                  <n-statistic label="总AC数" :value="classData.total_ac" size="large">
-                    <template #suffix>
-                      <Icon icon="streamline-emojis:raised-fist-1" width="20" />
-                    </template>
-                  </n-statistic>
-                </n-gi>
-                <n-gi>
-                  <n-statistic
-                    label="平均AC数"
-                    :value="classData.avg_ac.toFixed(2)"
-                    size="large"
-                  >
-                    <template #suffix>
-                      <Icon icon="streamline-emojis:chart" width="20" />
-                    </template>
-                  </n-statistic>
-                </n-gi>
-                <n-gi>
-                  <n-statistic
-                    label="中位数AC数"
-                    :value="classData.median_ac.toFixed(2)"
-                    size="large"
-                  >
-                    <template #suffix>
-                      <Icon icon="streamline-emojis:target" width="20" />
-                    </template>
-                  </n-statistic>
-                </n-gi>
-                <n-gi>
-                  <n-statistic
-                    label="总提交数"
-                    :value="classData.total_submission"
-                    size="large"
-                  >
-                    <template #suffix>
-                      <Icon icon="streamline-emojis:paper" width="20" />
-                    </template>
-                  </n-statistic>
-                </n-gi>
-                <n-gi>
-                  <n-statistic
-                    label="AC率"
-                    :value="classData.ac_rate.toFixed(1) + '%'"
-                    size="large"
-                  >
-                    <template #suffix>
-                      <Icon icon="streamline-emojis:check-mark" width="20" />
-                    </template>
-                  </n-statistic>
-                </n-gi>
-              </n-grid>
-
-              <n-divider style="margin: 12px 0" />
-
-              <!-- 详细统计 - 紧凑布局，统一格式 -->
-              <n-descriptions bordered :column="2" size="small" label-placement="left">
-                <!-- 分位数统计 -->
-                <n-descriptions-item label="第一四分位数(Q1)">
-                  {{ classData.q1_ac.toFixed(2) }}
-                </n-descriptions-item>
-                <n-descriptions-item label="第三四分位数(Q3)">
-                  {{ classData.q3_ac.toFixed(2) }}
-                </n-descriptions-item>
-                <n-descriptions-item label="四分位距(IQR)">
-                  {{ classData.iqr.toFixed(2) }}
-                </n-descriptions-item>
-                <n-descriptions-item label="标准差">
-                  {{ classData.std_dev.toFixed(2) }}
-                </n-descriptions-item>
-
-                <!-- 分层统计 -->
-                <n-descriptions-item label="前10名平均">
-                  {{ classData.top_10_avg.toFixed(2) }}
-                </n-descriptions-item>
-                <n-descriptions-item label="后10名平均">
-                  {{ classData.bottom_10_avg.toFixed(2) }}
-                </n-descriptions-item>
-                <n-descriptions-item label="前25%平均">
-                  {{ classData.top_25_avg.toFixed(2) }}
-                </n-descriptions-item>
-                <n-descriptions-item label="后25%平均">
-                  {{ classData.bottom_25_avg.toFixed(2) }}
-                </n-descriptions-item>
-
-                <!-- 人数 -->
-                <n-descriptions-item label="人数">
-                  {{ classData.user_count }}
-                </n-descriptions-item>
-              </n-descriptions>
-
-              <!-- 比率统计 - 使用进度条图表 -->
-              <n-card size="small" title="比率统计" embedded style="margin-top: 12px">
-                <n-space vertical :size="10">
-                  <n-progress
-                    type="line"
-                    :percentage="classData.excellent_rate"
-                    :show-indicator="true"
-                    :border-radius="4"
-                  >
-                    <template #default>
-                      优秀率: {{ classData.excellent_rate.toFixed(1) }}%
-                    </template>
-                  </n-progress>
-                  <n-progress
-                    type="line"
-                    :percentage="classData.pass_rate"
-                    :show-indicator="true"
-                    :border-radius="4"
-                    status="success"
-                  >
-                    <template #default>
-                      及格率: {{ classData.pass_rate.toFixed(1) }}%
-                    </template>
-                  </n-progress>
-                  <n-progress
-                    type="line"
-                    :percentage="classData.active_rate"
-                    :show-indicator="true"
-                    :border-radius="4"
-                    status="info"
-                  >
-                    <template #default>
-                      参与度: {{ classData.active_rate.toFixed(1) }}%
-                    </template>
-                  </n-progress>
-                </n-space>
-              </n-card>
-
-              <!-- 时间段统计（如果有） -->
-              <template
-                v-if="hasTimeRange && classData.recent_total_ac !== undefined"
-              >
-                <n-descriptions bordered :column="2" size="small" label-placement="left" style="margin-top: 12px">
-
-                  <n-descriptions-item label="时间段总AC">
-                    {{ classData.recent_total_ac }}
-                  </n-descriptions-item>
-                  <n-descriptions-item label="时间段平均AC">
-                    {{ classData.recent_avg_ac?.toFixed(2) }}
-                  </n-descriptions-item>
-                  <n-descriptions-item label="时间段中位数AC">
-                    {{ classData.recent_median_ac?.toFixed(2) }}
-                  </n-descriptions-item>
-                  <n-descriptions-item label="时间段前10名平均">
-                    {{ classData.recent_top_10_avg?.toFixed(2) }}
-                  </n-descriptions-item>
-                  <n-descriptions-item label="活跃学生数" :span="2">
-                    {{ classData.recent_active_count }}
-                  </n-descriptions-item>
-                </n-descriptions>
-              </template>
-            </n-flex>
-          </n-card>
-        </n-gi>
-      </n-grid>
-
-      <!-- 可视化图表 - 专注于对比 -->
-      <template v-if="comparisons.length > 0">
-        <!-- AC核心指标对比 - 三个独立图表并排显示 -->
-        <n-card title="AC核心指标对比" style="margin-top: 20px">
-          <n-grid :cols="3" :x-gap="16" :y-gap="16">
-            <n-gi>
-              <div style="height: 300px">
-                <Bar
-                  v-if="totalAcChartData"
-                  :data="totalAcChartData"
-                  :options="chartOptions"
-                />
-              </div>
-            </n-gi>
-            <n-gi>
-              <div style="height: 300px">
-                <Bar
-                  v-if="avgAcChartData"
-                  :data="avgAcChartData"
-                  :options="chartOptions"
-                />
-              </div>
-            </n-gi>
-            <n-gi>
-              <div style="height: 300px">
-                <Bar
-                  v-if="medianAcChartData"
-                  :data="medianAcChartData"
-                  :options="chartOptions"
-                />
-              </div>
-            </n-gi>
-          </n-grid>
-        </n-card>
-
-        <!-- 比率统计对比 - 三个独立图表并排显示 -->
-        <n-card title="比率统计对比" style="margin-top: 20px">
-          <n-grid :cols="3" :x-gap="16" :y-gap="16">
-            <n-gi>
-              <div style="height: 300px">
-                <Bar
-                  v-if="excellentRateChartData"
-                  :data="excellentRateChartData"
-                  :options="chartOptions"
-                />
-              </div>
-            </n-gi>
-            <n-gi>
-              <div style="height: 300px">
-                <Bar
-                  v-if="passRateChartData"
-                  :data="passRateChartData"
-                  :options="chartOptions"
-                />
-              </div>
-            </n-gi>
-            <n-gi>
-              <div style="height: 300px">
-                <Bar
-                  v-if="activeRateChartData"
-                  :data="activeRateChartData"
-                  :options="chartOptions"
-                />
-              </div>
-            </n-gi>
-          </n-grid>
-        </n-card>
-
-        <!-- 分层统计对比 - 四个独立图表并排显示 -->
-        <n-card title="分层统计对比" style="margin-top: 20px">
-          <n-grid :cols="2" :x-gap="16" :y-gap="16">
-            <n-gi>
-              <div style="height: 300px">
-                <Bar
-                  v-if="top10AvgChartData"
-                  :data="top10AvgChartData"
-                  :options="chartOptions"
-                />
-              </div>
-            </n-gi>
-            <n-gi>
-              <div style="height: 300px">
-                <Bar
-                  v-if="bottom10AvgChartData"
-                  :data="bottom10AvgChartData"
-                  :options="chartOptions"
-                />
-              </div>
-            </n-gi>
-            <n-gi>
-              <div style="height: 300px">
-                <Bar
-                  v-if="top25AvgChartData"
-                  :data="top25AvgChartData"
-                  :options="chartOptions"
-                />
-              </div>
-            </n-gi>
-            <n-gi>
-              <div style="height: 300px">
-                <Bar
-                  v-if="bottom25AvgChartData"
-                  :data="bottom25AvgChartData"
-                  :options="chartOptions"
-                />
-              </div>
-            </n-gi>
-          </n-grid>
-        </n-card>
-
-        <!-- 多维度雷达图 - 综合对比 -->
-        <n-card title="多维度综合对比" style="margin-top: 20px">
-          <div style="height: 500px">
-            <Radar
-              v-if="radarChartData"
-              :data="radarChartData"
-              :options="radarChartOptions"
-            />
-          </div>
-        </n-card>
-      </template>
-
-      <!-- 对比表格 -->
-      <n-card v-if="comparisons.length > 0" title="对比表格" style="margin-top: 20px">
-        <n-data-table
-          :data="comparisons"
-          :columns="[
-            {
-              title: '排名',
-              key: 'rank',
-              render: (_, index) => getRankColor(index).text,
-              width: 80,
-            },
-            { title: '班级', key: 'class_name', width: 150 },
-            { title: '人数', key: 'user_count', width: 80 },
-            { title: '总AC数', key: 'total_ac', width: 100 },
-            {
-              title: '平均AC',
-              key: 'avg_ac',
-              render: (row) => row.avg_ac.toFixed(2),
-            },
-            {
-              title: '中位数AC',
-              key: 'median_ac',
-              render: (row) => row.median_ac.toFixed(2),
-            },
-            {
-              title: '前10名平均',
-              key: 'top_10_avg',
-              render: (row) => row.top_10_avg.toFixed(2),
-            },
-            {
-              title: '后10名平均',
-              key: 'bottom_10_avg',
-              render: (row) => row.bottom_10_avg.toFixed(2),
-            },
-            {
-              title: '优秀率',
-              key: 'excellent_rate',
-              render: (row) => row.excellent_rate.toFixed(1) + '%',
-            },
-            {
-              title: '及格率',
-              key: 'pass_rate',
-              render: (row) => row.pass_rate.toFixed(1) + '%',
-            },
-            {
-              title: '参与度',
-              key: 'active_rate',
-              render: (row) => row.active_rate.toFixed(1) + '%',
-            },
-          ]"
-        />
-      </n-card>
-    </n-flex>
-  </n-card>
-</template>
-
-<style scoped>
-.n-statistic {
-  margin-bottom: 8px;
-}
-</style>
-
+<script setup lang="ts">
+import { h } from "vue"
+import { formatISO, sub, type Duration } from "date-fns"
+import { getClassPK } from "oj/api"
+import { useConfigStore } from "shared/store/config"
+import { Icon } from "@iconify/vue"
+import { Bar, Radar } from "vue-chartjs"
+import {
+  Chart as ChartJS,
+  CategoryScale,
+  LinearScale,
+  BarElement,
+  RadialLinearScale,
+  PointElement,
+  LineElement,
+  Title,
+  Tooltip,
+  Legend,
+  Colors,
+  Filler,
+} from "chart.js"
+
+// 注册Chart.js组件
+ChartJS.register(
+  CategoryScale,
+  LinearScale,
+  BarElement,
+  RadialLinearScale,
+  PointElement,
+  LineElement,
+  Title,
+  Tooltip,
+  Legend,
+  Colors,
+  Filler,
+)
+
+const configStore = useConfigStore()
+const message = useMessage()
+
+interface ClassComparison {
+  class_name: string
+  user_count: number
+  total_ac: number
+  total_submission: number
+  avg_ac: number
+  median_ac: number
+  q1_ac: number
+  q3_ac: number
+  iqr: number
+  std_dev: number
+  top_10_avg: number
+  bottom_10_avg: number
+  top_25_avg: number
+  bottom_25_avg: number
+  excellent_rate: number
+  pass_rate: number
+  active_rate: number
+  ac_rate: number
+  recent_total_ac?: number
+  recent_avg_ac?: number
+  recent_median_ac?: number
+  recent_top_10_avg?: number
+  recent_active_count?: number
+}
+
+const selectedClasses = ref<string[]>([])
+const comparisons = ref<ClassComparison[]>([])
+const duration = ref<string>("")
+const loading = ref(false)
+const hasTimeRange = ref(false)
+
+// 时间段选项（与 rank/list.vue 保持一致）
+const timeRangeOptions: SelectOption[] = [
+  { label: "全部时间", value: "" },
+  { label: "一周内", value: "weeks:1" },
+  { label: "一个月内", value: "months:1" },
+  { label: "两个月内", value: "months:2" },
+  { label: "半年内", value: "months:6" },
+  { label: "一年内", value: "years:1" },
+]
+
+// 计算时间段（与 rank/list.vue 保持一致）
+const subOptions = computed<Duration | null>(() => {
+  if (!duration.value || duration.value === "") {
+    return null
+  }
+  const dur = timeRangeOptions.find((it) => it.value === duration.value)
+  if (!dur || !dur.value || dur.value === "") {
+    return null
+  }
+  const x = dur.value.toString().split(":")
+  const unit = x[0]
+  const n = x[1]
+  return { [unit]: parseInt(n) } as Duration
+})
+
+// 根据时间段选项计算开始和结束时间
+function getTimeRange(): {
+  startTime?: string
+  endTime?: string
+} {
+  if (!duration.value || duration.value === "" || !subOptions.value) {
+    return {}
+  }
+
+  const current = Date.now()
+  const startTime = formatISO(sub(current, subOptions.value))
+  const endTime = formatISO(current)
+
+  return {
+    startTime,
+    endTime,
+  }
+}
+
+const classOptions = computed(() => {
+  return (
+    configStore.config?.class_list.map((item) => ({
+      label: `${item.slice(0, 2)}计算机${item.slice(2)}班`,
+      value: item,
+    })) ?? []
+  )
+})
+
+async function compare() {
+  if (selectedClasses.value.length < 2) {
+    message.warning("请至少选择2个班级")
+    return
+  }
+
+  loading.value = true
+  try {
+    const { startTime, endTime } = getTimeRange()
+
+    const res = await getClassPK(selectedClasses.value, startTime, endTime)
+    comparisons.value = res.data.comparisons
+    hasTimeRange.value = res.data.has_time_range || false
+  } catch (error) {
+    message.error("获取数据失败")
+  } finally {
+    loading.value = false
+  }
+}
+
+// 计算排名颜色
+function getRankColor(index: number) {
+  if (index === 0) return { type: "success" as const, text: "🥇" }
+  if (index === 1) return { type: "info" as const, text: "🥈" }
+  if (index === 2) return { type: "warning" as const, text: "🥉" }
+  return { type: "default" as const, text: `${index + 1}` }
+}
+
+// 获取班级颜色
+function getClassColor(index: number) {
+  const colors = [
+    { bg: "rgba(24, 160, 88, 0.2)", border: "rgba(24, 160, 88, 0.8)" }, // success
+    { bg: "rgba(32, 128, 240, 0.2)", border: "rgba(32, 128, 240, 0.8)" }, // info
+    { bg: "rgba(240, 160, 32, 0.2)", border: "rgba(240, 160, 32, 0.8)" }, // warning
+    { bg: "rgba(208, 48, 80, 0.2)", border: "rgba(208, 48, 80, 0.8)" }, // error
+    { bg: "rgba(128, 90, 213, 0.2)", border: "rgba(128, 90, 213, 0.8)" }, // purple
+    { bg: "rgba(0, 184, 148, 0.2)", border: "rgba(0, 184, 148, 0.8)" }, // teal
+  ]
+  return colors[index % colors.length]
+}
+
+// 总AC数对比图 - 每个班级用不同颜色
+const totalAcChartData = computed(() => {
+  if (comparisons.value.length === 0) return null
+
+  const labels = comparisons.value.map((c) => c.class_name)
+  const datasets = [
+    {
+      label: "总AC数",
+      data: comparisons.value.map((c) => c.total_ac),
+      backgroundColor: comparisons.value.map((_, i) => getClassColor(i).bg),
+      borderColor: comparisons.value.map((_, i) => getClassColor(i).border),
+      borderWidth: 2,
+    },
+  ]
+
+  return { labels, datasets }
+})
+
+// 平均AC数对比图
+const avgAcChartData = computed(() => {
+  if (comparisons.value.length === 0) return null
+
+  const labels = comparisons.value.map((c) => c.class_name)
+  const datasets = [
+    {
+      label: "平均AC数",
+      data: comparisons.value.map((c) => c.avg_ac),
+      backgroundColor: comparisons.value.map((_, i) => getClassColor(i).bg),
+      borderColor: comparisons.value.map((_, i) => getClassColor(i).border),
+      borderWidth: 2,
+    },
+  ]
+
+  return { labels, datasets }
+})
+
+// 中位数AC数对比图
+const medianAcChartData = computed(() => {
+  if (comparisons.value.length === 0) return null
+
+  const labels = comparisons.value.map((c) => c.class_name)
+  const datasets = [
+    {
+      label: "中位数AC数",
+      data: comparisons.value.map((c) => c.median_ac),
+      backgroundColor: comparisons.value.map((_, i) => getClassColor(i).bg),
+      borderColor: comparisons.value.map((_, i) => getClassColor(i).border),
+      borderWidth: 2,
+    },
+  ]
+
+  return { labels, datasets }
+})
+
+// 优秀率对比图
+const excellentRateChartData = computed(() => {
+  if (comparisons.value.length === 0) return null
+
+  const labels = comparisons.value.map((c) => c.class_name)
+  const datasets = [
+    {
+      label: "优秀率",
+      data: comparisons.value.map((c) => c.excellent_rate),
+      backgroundColor: comparisons.value.map((_, i) => getClassColor(i).bg),
+      borderColor: comparisons.value.map((_, i) => getClassColor(i).border),
+      borderWidth: 2,
+    },
+  ]
+
+  return { labels, datasets }
+})
+
+// 及格率对比图
+const passRateChartData = computed(() => {
+  if (comparisons.value.length === 0) return null
+
+  const labels = comparisons.value.map((c) => c.class_name)
+  const datasets = [
+    {
+      label: "及格率",
+      data: comparisons.value.map((c) => c.pass_rate),
+      backgroundColor: comparisons.value.map((_, i) => getClassColor(i).bg),
+      borderColor: comparisons.value.map((_, i) => getClassColor(i).border),
+      borderWidth: 2,
+    },
+  ]
+
+  return { labels, datasets }
+})
+
+// 参与度对比图
+const activeRateChartData = computed(() => {
+  if (comparisons.value.length === 0) return null
+
+  const labels = comparisons.value.map((c) => c.class_name)
+  const datasets = [
+    {
+      label: "参与度",
+      data: comparisons.value.map((c) => c.active_rate),
+      backgroundColor: comparisons.value.map((_, i) => getClassColor(i).bg),
+      borderColor: comparisons.value.map((_, i) => getClassColor(i).border),
+      borderWidth: 2,
+    },
+  ]
+
+  return { labels, datasets }
+})
+
+// 前10名平均对比图
+const top10AvgChartData = computed(() => {
+  if (comparisons.value.length === 0) return null
+
+  const labels = comparisons.value.map((c) => c.class_name)
+  const datasets = [
+    {
+      label: "前10名平均",
+      data: comparisons.value.map((c) => c.top_10_avg),
+      backgroundColor: comparisons.value.map((_, i) => getClassColor(i).bg),
+      borderColor: comparisons.value.map((_, i) => getClassColor(i).border),
+      borderWidth: 2,
+    },
+  ]
+
+  return { labels, datasets }
+})
+
+// 后10名平均对比图
+const bottom10AvgChartData = computed(() => {
+  if (comparisons.value.length === 0) return null
+
+  const labels = comparisons.value.map((c) => c.class_name)
+  const datasets = [
+    {
+      label: "后10名平均",
+      data: comparisons.value.map((c) => c.bottom_10_avg),
+      backgroundColor: comparisons.value.map((_, i) => getClassColor(i).bg),
+      borderColor: comparisons.value.map((_, i) => getClassColor(i).border),
+      borderWidth: 2,
+    },
+  ]
+
+  return { labels, datasets }
+})
+
+// 前25%平均对比图
+const top25AvgChartData = computed(() => {
+  if (comparisons.value.length === 0) return null
+
+  const labels = comparisons.value.map((c) => c.class_name)
+  const datasets = [
+    {
+      label: "前25%平均",
+      data: comparisons.value.map((c) => c.top_25_avg),
+      backgroundColor: comparisons.value.map((_, i) => getClassColor(i).bg),
+      borderColor: comparisons.value.map((_, i) => getClassColor(i).border),
+      borderWidth: 2,
+    },
+  ]
+
+  return { labels, datasets }
+})
+
+// 后25%平均对比图
+const bottom25AvgChartData = computed(() => {
+  if (comparisons.value.length === 0) return null
+
+  const labels = comparisons.value.map((c) => c.class_name)
+  const datasets = [
+    {
+      label: "后25%平均",
+      data: comparisons.value.map((c) => c.bottom_25_avg),
+      backgroundColor: comparisons.value.map((_, i) => getClassColor(i).bg),
+      borderColor: comparisons.value.map((_, i) => getClassColor(i).border),
+      borderWidth: 2,
+    },
+  ]
+
+  return { labels, datasets }
+})
+
+// 雷达图数据 - 多维度综合对比
+const radarChartData = computed(() => {
+  if (comparisons.value.length === 0) return null
+
+  // 归一化数据到0-100范围
+  const normalize = (value: number, max: number, min: number) => {
+    if (max === min) return 50
+    return ((value - min) / (max - min)) * 100
+  }
+
+  const metrics = [
+    "总AC数",
+    "平均AC数",
+    "中位数AC数",
+    "优秀率",
+    "及格率",
+    "参与度",
+  ]
+
+  // 计算每个指标的最大最小值
+  const maxValues = [
+    Math.max(...comparisons.value.map((c) => c.total_ac)),
+    Math.max(...comparisons.value.map((c) => c.avg_ac)),
+    Math.max(...comparisons.value.map((c) => c.median_ac)),
+    100, // 优秀率最大值
+    100, // 及格率最大值
+    100, // 参与度最大值
+  ]
+
+  const minValues = [
+    Math.min(...comparisons.value.map((c) => c.total_ac)),
+    Math.min(...comparisons.value.map((c) => c.avg_ac)),
+    Math.min(...comparisons.value.map((c) => c.median_ac)),
+    0,
+    0,
+    0,
+  ]
+
+  const datasets = comparisons.value.map((c, index) => {
+    const color = getClassColor(index)
+    return {
+      label: c.class_name,
+      data: [
+        normalize(c.total_ac, maxValues[0], minValues[0]),
+        normalize(c.avg_ac, maxValues[1], minValues[1]),
+        normalize(c.median_ac, maxValues[2], minValues[2]),
+        c.excellent_rate,
+        c.pass_rate,
+        c.active_rate,
+      ],
+      backgroundColor: color.bg,
+      borderColor: color.border,
+      borderWidth: 2,
+      pointBackgroundColor: color.border,
+      pointBorderColor: "#fff",
+      pointHoverBackgroundColor: "#fff",
+      pointHoverBorderColor: color.border,
+    }
+  })
+
+  return {
+    labels: metrics,
+    datasets,
+  }
+})
+
+// 图表配置 - 优化对比效果
+const chartOptions = {
+  responsive: true,
+  maintainAspectRatio: false,
+  plugins: {
+    legend: {
+      position: "bottom" as const,
+      display: true,
+      labels: {
+        boxWidth: 0,
+        padding: 10,
+      },
+    },
+    tooltip: {
+      mode: "index" as const,
+      intersect: false,
+      callbacks: {
+        label: function (context: any) {
+          let label = context.dataset.label || ""
+          if (label) {
+            label += ": "
+          }
+          if (context.parsed.y !== null) {
+            label += context.parsed.y.toFixed(2)
+          }
+          return label
+        },
+      },
+    },
+    datalabels: {
+      display: false,
+    },
+  },
+  scales: {
+    y: {
+      beginAtZero: true,
+      grid: {
+        display: true,
+        color: "rgba(0, 0, 0, 0.05)",
+      },
+    },
+    x: {
+      grid: {
+        display: false,
+      },
+    },
+  },
+}
+
+const radarChartOptions = {
+  responsive: true,
+  maintainAspectRatio: false,
+  plugins: {
+    legend: {
+      position: "bottom" as const,
+    },
+  },
+  scales: {
+    r: {
+      beginAtZero: true,
+      max: 100,
+      ticks: {
+        stepSize: 20,
+      },
+    },
+  },
+}
+</script>
+
+<template>
+  <n-card>
+    <n-flex vertical :size="20">
+      <n-h2 style="margin-bottom: 0">班级PK</n-h2>
+
+      <n-flex :wrap="false" align="flex-start" :size="16">
+        <n-form-item label="选择班级（至少2个）" style="width: 300px; margin-bottom: 0">
+          <n-select
+            v-model:value="selectedClasses"
+            :options="classOptions"
+            multiple
+            placeholder="选择要比较的班级"
+          />
+        </n-form-item>
+
+        <n-form-item label="时间段（可选）" style="width: 200px; margin-bottom: 0">
+          <n-select
+            v-model:value="duration"
+            :options="timeRangeOptions"
+            clearable
+            placeholder="选择时间段"
+            style="width: 100%"
+          />
+        </n-form-item>
+
+        <n-button type="primary" @click="compare" :loading="loading" style="margin-top: 26px">
+          开始PK
+        </n-button>
+      </n-flex>
+
+      <!-- 班级对比卡片 -->
+      <n-grid
+        v-if="comparisons.length > 0"
+        :cols="comparisons.length > 2 ? 2 : comparisons.length"
+        :x-gap="16"
+        :y-gap="16"
+      >
+        <n-gi v-for="(classData, index) in comparisons" :key="classData.class_name">
+          <n-card
+            :title="classData.class_name"
+            :bordered="true"
+            hoverable
+            :style="{
+              borderTop: `4px solid ${
+                getRankColor(index).type === 'success'
+                  ? '#18a058'
+                  : getRankColor(index).type === 'info'
+                    ? '#2080f0'
+                    : getRankColor(index).type === 'warning'
+                      ? '#f0a020'
+                      : '#d03050'
+              }`,
+            }"
+          >
+            <template #header-extra>
+              <n-tag :type="getRankColor(index).type" size="large">
+                {{ getRankColor(index).text }}
+              </n-tag>
+            </template>
+
+            <!-- 班级信息布局 - 优化为便于比较 -->
+            <n-flex vertical :size="12">
+              <!-- AC核心指标 - 突出显示，便于横向对比 -->
+              <n-grid :cols="5" :x-gap="8" responsive="screen">
+                <n-gi>
+                  <n-statistic label="总AC数" :value="classData.total_ac" size="large" class="stat-total-ac">
+                    <template #suffix>
+                      <Icon icon="streamline-emojis:raised-fist-1" width="20" />
+                    </template>
+                  </n-statistic>
+                </n-gi>
+                <n-gi>
+                  <n-statistic
+                    label="平均AC数"
+                    :value="classData.avg_ac.toFixed(2)"
+                    size="large"
+                    class="stat-avg-ac"
+                  >
+                    <template #suffix>
+                      <Icon icon="streamline-emojis:chart" width="20" />
+                    </template>
+                  </n-statistic>
+                </n-gi>
+                <n-gi>
+                  <n-statistic
+                    label="中位数AC数"
+                    :value="classData.median_ac.toFixed(2)"
+                    size="large"
+                    class="stat-median-ac"
+                  >
+                    <template #suffix>
+                      <Icon icon="streamline-emojis:target" width="20" />
+                    </template>
+                  </n-statistic>
+                </n-gi>
+                <n-gi>
+                  <n-statistic
+                    label="总提交数"
+                    :value="classData.total_submission"
+                    size="large"
+                    class="stat-total-submission"
+                  >
+                    <template #suffix>
+                      <Icon icon="streamline-emojis:paper" width="20" />
+                    </template>
+                  </n-statistic>
+                </n-gi>
+                <n-gi>
+                  <n-statistic
+                    label="AC率"
+                    :value="classData.ac_rate.toFixed(1) + '%'"
+                    size="large"
+                    class="stat-ac-rate"
+                  >
+                    <template #suffix>
+                      <Icon icon="streamline-emojis:check-mark" width="20" />
+                    </template>
+                  </n-statistic>
+                </n-gi>
+              </n-grid>
+
+              <n-divider style="margin: 12px 0" />
+
+              <!-- 详细统计 - 紧凑布局，统一格式 -->
+              <n-descriptions bordered :column="2" size="small" label-placement="left">
+                <!-- 分位数统计 -->
+                <n-descriptions-item label="第一四分位数(Q1)">
+                  <span style="color: #9254de; font-weight: 500">{{ classData.q1_ac.toFixed(2) }}</span>
+                </n-descriptions-item>
+                <n-descriptions-item label="第三四分位数(Q3)">
+                  <span style="color: #f759ab; font-weight: 500">{{ classData.q3_ac.toFixed(2) }}</span>
+                </n-descriptions-item>
+                <n-descriptions-item label="四分位距(IQR)">
+                  <span style="color: #13c2c2; font-weight: 500">{{ classData.iqr.toFixed(2) }}</span>
+                </n-descriptions-item>
+                <n-descriptions-item label="标准差">
+                  <span style="color: #fa8c16; font-weight: 500">{{ classData.std_dev.toFixed(2) }}</span>
+                </n-descriptions-item>
+
+                <!-- 分层统计 -->
+                <n-descriptions-item label="前10名平均">
+                  <span style="color: #cf1322; font-weight: 600">{{ classData.top_10_avg.toFixed(2) }}</span>
+                </n-descriptions-item>
+                <n-descriptions-item label="后10名平均">
+                  <span style="color: #096dd9; font-weight: 500">{{ classData.bottom_10_avg.toFixed(2) }}</span>
+                </n-descriptions-item>
+                <n-descriptions-item label="前25%平均">
+                  <span style="color: #f5222d; font-weight: 600">{{ classData.top_25_avg.toFixed(2) }}</span>
+                </n-descriptions-item>
+                <n-descriptions-item label="后25%平均">
+                  <span style="color: #531dab; font-weight: 500">{{ classData.bottom_25_avg.toFixed(2) }}</span>
+                </n-descriptions-item>
+
+                <!-- 人数 -->
+                <n-descriptions-item label="人数">
+                  <span style="color: #1890ff; font-weight: 600">{{ classData.user_count }}</span>
+                </n-descriptions-item>
+              </n-descriptions>
+
+              <!-- 比率统计 - 使用进度条图表 -->
+              <n-card size="small" title="比率统计" embedded style="margin-top: 12px">
+                <n-space vertical :size="10">
+                  <n-progress
+                    type="line"
+                    :percentage="classData.excellent_rate"
+                    :show-indicator="true"
+                    :border-radius="4"
+                  >
+                    <template #default>
+                      优秀率: {{ classData.excellent_rate.toFixed(1) }}%
+                    </template>
+                  </n-progress>
+                  <n-progress
+                    type="line"
+                    :percentage="classData.pass_rate"
+                    :show-indicator="true"
+                    :border-radius="4"
+                    status="success"
+                  >
+                    <template #default>
+                      及格率: {{ classData.pass_rate.toFixed(1) }}%
+                    </template>
+                  </n-progress>
+                  <n-progress
+                    type="line"
+                    :percentage="classData.active_rate"
+                    :show-indicator="true"
+                    :border-radius="4"
+                    status="info"
+                  >
+                    <template #default>
+                      参与度: {{ classData.active_rate.toFixed(1) }}%
+                    </template>
+                  </n-progress>
+                </n-space>
+              </n-card>
+
+              <!-- 时间段统计（如果有） -->
+              <template
+                v-if="hasTimeRange && classData.recent_total_ac !== undefined"
+              >
+                <n-descriptions bordered :column="2" size="small" label-placement="left" style="margin-top: 12px">
+
+                  <n-descriptions-item label="时间段总AC">
+                    <span style="color: #ff7875; font-weight: 600">{{ classData.recent_total_ac }}</span>
+                  </n-descriptions-item>
+                  <n-descriptions-item label="时间段平均AC">
+                    <span style="color: #73d13d; font-weight: 600">{{ classData.recent_avg_ac?.toFixed(2) }}</span>
+                  </n-descriptions-item>
+                  <n-descriptions-item label="时间段中位数AC">
+                    <span style="color: #ffc53d; font-weight: 600">{{ classData.recent_median_ac?.toFixed(2) }}</span>
+                  </n-descriptions-item>
+                  <n-descriptions-item label="时间段前10名平均">
+                    <span style="color: #ff4d4f; font-weight: 600">{{ classData.recent_top_10_avg?.toFixed(2) }}</span>
+                  </n-descriptions-item>
+                  <n-descriptions-item label="活跃学生数" :span="2">
+                    <span style="color: #1890ff; font-weight: 600">{{ classData.recent_active_count }}</span>
+                  </n-descriptions-item>
+                </n-descriptions>
+              </template>
+            </n-flex>
+          </n-card>
+        </n-gi>
+      </n-grid>
+
+      <!-- 可视化图表 - 专注于对比 -->
+      <template v-if="comparisons.length > 0">
+        <!-- AC核心指标对比 - 三个独立图表并排显示 -->
+        <n-card title="AC核心指标对比" style="margin-top: 20px">
+          <n-grid :cols="3" :x-gap="16" :y-gap="16">
+            <n-gi>
+              <div style="height: 300px">
+                <Bar
+                  v-if="totalAcChartData"
+                  :data="totalAcChartData"
+                  :options="chartOptions"
+                />
+              </div>
+            </n-gi>
+            <n-gi>
+              <div style="height: 300px">
+                <Bar
+                  v-if="avgAcChartData"
+                  :data="avgAcChartData"
+                  :options="chartOptions"
+                />
+              </div>
+            </n-gi>
+            <n-gi>
+              <div style="height: 300px">
+                <Bar
+                  v-if="medianAcChartData"
+                  :data="medianAcChartData"
+                  :options="chartOptions"
+                />
+              </div>
+            </n-gi>
+          </n-grid>
+        </n-card>
+
+        <!-- 比率统计对比 - 三个独立图表并排显示 -->
+        <n-card title="比率统计对比" style="margin-top: 20px">
+          <n-grid :cols="3" :x-gap="16" :y-gap="16">
+            <n-gi>
+              <div style="height: 300px">
+                <Bar
+                  v-if="excellentRateChartData"
+                  :data="excellentRateChartData"
+                  :options="chartOptions"
+                />
+              </div>
+            </n-gi>
+            <n-gi>
+              <div style="height: 300px">
+                <Bar
+                  v-if="passRateChartData"
+                  :data="passRateChartData"
+                  :options="chartOptions"
+                />
+              </div>
+            </n-gi>
+            <n-gi>
+              <div style="height: 300px">
+                <Bar
+                  v-if="activeRateChartData"
+                  :data="activeRateChartData"
+                  :options="chartOptions"
+                />
+              </div>
+            </n-gi>
+          </n-grid>
+        </n-card>
+
+        <!-- 分层统计对比 - 四个独立图表并排显示 -->
+        <n-card title="分层统计对比" style="margin-top: 20px">
+          <n-grid :cols="2" :x-gap="16" :y-gap="16">
+            <n-gi>
+              <div style="height: 300px">
+                <Bar
+                  v-if="top10AvgChartData"
+                  :data="top10AvgChartData"
+                  :options="chartOptions"
+                />
+              </div>
+            </n-gi>
+            <n-gi>
+              <div style="height: 300px">
+                <Bar
+                  v-if="bottom10AvgChartData"
+                  :data="bottom10AvgChartData"
+                  :options="chartOptions"
+                />
+              </div>
+            </n-gi>
+            <n-gi>
+              <div style="height: 300px">
+                <Bar
+                  v-if="top25AvgChartData"
+                  :data="top25AvgChartData"
+                  :options="chartOptions"
+                />
+              </div>
+            </n-gi>
+            <n-gi>
+              <div style="height: 300px">
+                <Bar
+                  v-if="bottom25AvgChartData"
+                  :data="bottom25AvgChartData"
+                  :options="chartOptions"
+                />
+              </div>
+            </n-gi>
+          </n-grid>
+        </n-card>
+
+        <!-- 多维度雷达图 - 综合对比 -->
+        <n-card title="多维度综合对比" style="margin-top: 20px">
+          <div style="height: 500px">
+            <Radar
+              v-if="radarChartData"
+              :data="radarChartData"
+              :options="radarChartOptions"
+            />
+          </div>
+        </n-card>
+      </template>
+
+      <!-- 对比表格 -->
+      <n-card v-if="comparisons.length > 0" title="对比表格" style="margin-top: 20px">
+        <n-data-table
+          :data="comparisons"
+          :columns="[
+            {
+              title: '排名',
+              key: 'rank',
+              render: (_, index) => getRankColor(index).text,
+              width: 80,
+            },
+            { title: '班级', key: 'class_name', width: 150 },
+            {
+              title: '人数',
+              key: 'user_count',
+              width: 80,
+              render: (row) => h('span', { style: { color: '#1890ff', fontWeight: '600' } }, row.user_count),
+            },
+            {
+              title: '总AC数',
+              key: 'total_ac',
+              width: 100,
+              render: (row) => h('span', { style: { color: '#ff4d4f', fontWeight: '600' } }, row.total_ac),
+            },
+            {
+              title: '平均AC',
+              key: 'avg_ac',
+              render: (row) => h('span', { style: { color: '#52c41a', fontWeight: '600' } }, row.avg_ac.toFixed(2)),
+            },
+            {
+              title: '中位数AC',
+              key: 'median_ac',
+              render: (row) => h('span', { style: { color: '#fa8c16', fontWeight: '600' } }, row.median_ac.toFixed(2)),
+            },
+            {
+              title: '前10名平均',
+              key: 'top_10_avg',
+              render: (row) => h('span', { style: { color: '#cf1322', fontWeight: '600' } }, row.top_10_avg.toFixed(2)),
+            },
+            {
+              title: '后10名平均',
+              key: 'bottom_10_avg',
+              render: (row) => h('span', { style: { color: '#096dd9', fontWeight: '500' } }, row.bottom_10_avg.toFixed(2)),
+            },
+            {
+              title: '优秀率',
+              key: 'excellent_rate',
+              render: (row) => h('span', { style: { color: '#faad14', fontWeight: '600' } }, row.excellent_rate.toFixed(1) + '%'),
+            },
+            {
+              title: '及格率',
+              key: 'pass_rate',
+              render: (row) => h('span', { style: { color: '#52c41a', fontWeight: '600' } }, row.pass_rate.toFixed(1) + '%'),
+            },
+            {
+              title: '参与度',
+              key: 'active_rate',
+              render: (row) => h('span', { style: { color: '#1890ff', fontWeight: '600' } }, row.active_rate.toFixed(1) + '%'),
+            },
+          ]"
+        />
+      </n-card>
+    </n-flex>
+  </n-card>
+</template>
+
+<style scoped>
+/* ==================== 统计数字颜色设置 ==================== */
+/* 覆盖 Naive UI n-statistic 组件的所有可能类名 */
+
+/* 总AC数 - 红色 */
+.stat-total-ac :deep(.n-statistic-value),
+.stat-total-ac :deep(.n-statistic-value__content),
+.stat-total-ac :deep(.n-number-animation),
+.stat-total-ac :deep(.n-statistic-value > *),
+.stat-total-ac :deep(.n-statistic-value span) {
+  color: #ff4d4f !important;
+  font-weight: 600;
+}
+
+/* 平均AC数 - 绿色 */
+.stat-avg-ac :deep(.n-statistic-value),
+.stat-avg-ac :deep(.n-statistic-value__content),
+.stat-avg-ac :deep(.n-number-animation),
+.stat-avg-ac :deep(.n-statistic-value > *),
+.stat-avg-ac :deep(.n-statistic-value span) {
+  color: #52c41a !important;
+  font-weight: 600;
+}
+
+/* 中位数AC数 - 橙色 */
+.stat-median-ac :deep(.n-statistic-value),
+.stat-median-ac :deep(.n-statistic-value__content),
+.stat-median-ac :deep(.n-number-animation),
+.stat-median-ac :deep(.n-statistic-value > *),
+.stat-median-ac :deep(.n-statistic-value span) {
+  color: #fa8c16 !important;
+  font-weight: 600;
+}
+
+/* 总提交数 - 紫色 */
+.stat-total-submission :deep(.n-statistic-value),
+.stat-total-submission :deep(.n-statistic-value__content),
+.stat-total-submission :deep(.n-number-animation),
+.stat-total-submission :deep(.n-statistic-value > *),
+.stat-total-submission :deep(.n-statistic-value span) {
+  color: #805ad5 !important;
+  font-weight: 600;
+}
+
+/* AC率 - 青色 */
+.stat-ac-rate :deep(.n-statistic-value),
+.stat-ac-rate :deep(.n-statistic-value__content),
+.stat-ac-rate :deep(.n-number-animation),
+.stat-ac-rate :deep(.n-statistic-value > *),
+.stat-ac-rate :deep(.n-statistic-value span) {
+  color: #00b894 !important;
+  font-weight: 600;
+}
+</style>
+