feat(maps): 画布聚焦减负（聚焦层/详情浮层/汇总条/目标树收起/跨层摘要）— C 方案

- MapCanvas: 层聚焦与回全景联动；右栏停用改自绘可拖详情浮层；目标树默认收起+localStorage 持久化；底部跨层关系摘要条；聚焦态只绘聚焦层同层连线
- StrategyLayer: 层标题可点击聚焦并标「聚焦中」；非聚焦层压缩为 ≤48px 单行摘要（层名—达成率/目标数/mini 色条）
- MapSummaryBar: 汇总条压缩 ≤44px、5 项同排；窄屏无横向溢出
- MapEditBar: 新增「全景 / L1–L4」聚焦切换 chip（内联 SVG，无 emoji）
- 只读渲染层改动：不写 canvas_data / map_connections，无新增写链路调用

frontend/src/components/strategy-map/MapEditBar.vue

@@ -90,9 +90,32 @@
         回全景
       </el-button>
 
-      <el-button size="small" text @click="$emit('toggle-tree')">
+      <el-button size="small" text @click="$emit('toggle-tree')" :title="treeOpen ? '收起左侧目标树（画布全宽）' : '展开左侧目标树'">
         {{ treeOpen ? '收起目标树' : '展开目标树' }}
       </el-button>
+
+      <!-- C 方案：聚焦开关（全景 = 默认四层等宽） -->
+      <div class="eb-chips eb-focus" role="group" aria-label="聚焦层">
+        <button
+          type="button"
+          class="eb-chip"
+          :class="{ on: !focusLayer }"
+          title="四层全景（默认）"
+          @click="$emit('focus-layer', null)"
+        >全景</button>
+        <button
+          v-for="cfg in layerConfigs"
+          :key="'focus-' + cfg.key"
+          type="button"
+          class="eb-chip"
+          :class="{ on: focusLayer === cfg.key }"
+          :title="focusLayer === cfg.key ? '再次点击退出聚焦' : '聚焦' + cfg.label"
+          @click="$emit('focus-layer', focusLayer === cfg.key ? null : cfg.key)"
+        >
+          <span class="layer-dot" :style="{ background: cfg.color }"></span>
+          {{ cfg.short }}
+        </button>
+      </div>
     </div>
   </div>
 </template>
@@ -105,6 +128,8 @@ defineProps<{
   layerConfigs: { key: string; label: string; short: string; color: string }[]
   canUndo: boolean
   treeOpen: boolean
+  /** C 方案聚焦层：null = 四层全景 */
+  focusLayer?: string | null
 }>()
 
 const emit = defineEmits<{
@@ -117,6 +142,7 @@ const emit = defineEmits<{
   (e: 'fit'): void
   (e: 'toggle-tree'): void
   (e: 'completeness'): void
+  (e: 'focus-layer', key: string | null): void
 }>()
 
 const filterOptions: { value: 'all' | 'risk' | 'nodata'; label: string }[] = [

frontend/src/components/strategy-map/MapSummaryBar.vue

@@ -1,73 +1,132 @@
 <template>
   <section class="map-summary" aria-label="战略地图摘要">
+    <!-- C 方案（2026-10-23）：汇总条压成单行（≤44px），5 项指标同排；明细收进「明细」展开位 -->
+    <div class="ms-row">
       <!-- ① 营业收入：分业务线全额售价（总额法）· 禁净额 / 禁合并 -->
-    <div class="sum-card sum-card--wide">
-      <div class="sum-head">
-        <span class="sum-label">营业收入</span>
-        <span v-if="revenue && revenue.caliber_label" class="sum-badge calm">{{ revenue.caliber_label }}</span>
+      <div class="ms-metric ms-metric--rev">
+        <span class="ms-label">营业收入</span>
+        <span class="ms-value mono" :class="{ muted: revenueTotal == null }">
+          <template v-if="revenueTotal != null">{{ fmtNum(revenueTotal) }}<i class="ms-unit">万元</i></template>
+          <template v-else>—<i class="ms-unit">无数据</i></template>
+        </span>
+        <span v-if="revenue && revenue.caliber_label" class="ms-badge calm">{{ revenue.caliber_label }}</span>
+      </div>
+
+      <span class="ms-sep" aria-hidden="true"></span>
+
+      <!-- ② 毛利率 -->
+      <div class="ms-metric">
+        <span class="ms-label">毛利率</span>
+        <span class="ms-value mono" :class="{ muted: gmValue == null }">
+          <template v-if="gmValue != null">{{ gmValue.toFixed(2) }}<i class="ms-unit">%</i></template>
+          <template v-else>—<i class="ms-unit">无数据</i></template>
+        </span>
+        <span v-if="grossMargin && grossMargin.data_tag" class="ms-badge warn">{{ grossMargin.data_tag }}</span>
+      </div>
+
+      <span class="ms-sep" aria-hidden="true"></span>
+
+      <!-- ③ 战略目标达成率 -->
+      <div class="ms-metric">
+        <span class="ms-label">战略目标达成率</span>
+        <span class="ms-value mono" :class="achievement == null ? 'muted' : 'lv-' + achievementLevel">
+          <template v-if="achievement != null">{{ Math.round(achievement) }}<i class="ms-unit">%</i></template>
+          <template v-else>—<i class="ms-unit">无数据</i></template>
+        </span>
+      </div>
+
+      <span class="ms-sep" aria-hidden="true"></span>
+
+      <!-- ④ 风险目标数 -->
+      <div class="ms-metric">
+        <span class="ms-label">风险目标</span>
+        <span class="ms-value mono" :class="riskCount == null ? 'muted' : (riskCount > 0 ? 'lv-red' : 'lv-green')">
+          <template v-if="riskCount != null">{{ riskCount }}</template>
+          <template v-else>—<i class="ms-unit">无数据</i></template>
+        </span>
+      </div>
+
+      <span class="ms-sep" aria-hidden="true"></span>
+
+      <!-- ⑤ 目标·连线（当前画布规模） -->
+      <div class="ms-metric ms-metric--scale">
+        <span class="ms-label">目标·连线</span>
+        <span class="ms-value mono">
+          <template v-if="objectivesTotal != null">{{ objectivesTotal }}</template>
+          <template v-else>—</template>
+          <i class="ms-unit">个目标</i>
+          <span class="ms-div">/</span>
+          <template v-if="connectionsTotal != null">{{ connectionsTotal }}</template>
+          <template v-else>—</template>
+          <i class="ms-unit">条连线</i>
+        </span>
+      </div>
+
+      <button
+        type="button"
+        class="ms-detail-btn"
+        :aria-expanded="detailOpen ? 'true' : 'false'"
+        @click="detailOpen = !detailOpen"
+      >
+        <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" aria-hidden="true">
+          <path :d="detailOpen ? 'M6 15l6-6 6 6' : 'M6 9l6 6 6-6'" />
+        </svg>
+        {{ detailOpen ? '收起' : '明细' }}
+      </button>
+    </div>
+
+    <!-- 明细（默认收起；展开后保留分线金额 / 口径 / 管理指标全部信息，不丢信息） -->
+    <div v-if="detailOpen" class="ms-detail">
+      <div class="ms-card">
+        <div class="ms-detail-head">
+          <span class="ms-label">营业收入 · 分业务线</span>
+          <span v-if="revenue && revenue.caliber_label" class="ms-badge calm">{{ revenue.caliber_label }}</span>
         </div>
         <div v-if="revenueLines.length" class="rev-lines">
           <div v-for="ln in revenueLines" :key="ln.key" class="rev-line">
             <span class="rev-line-label">{{ ln.label }}</span>
             <span class="rev-line-value mono" :class="{ muted: ln.amount == null }">
-            <template v-if="ln.amount != null">{{ fmtNum(ln.amount) }}<i class="sum-unit">万元</i></template>
-            <template v-else>—<i class="sum-unit">无数据</i></template>
+              <template v-if="ln.amount != null">{{ fmtNum(ln.amount) }}<i class="ms-unit">万元</i></template>
+              <template v-else>—<i class="ms-unit">无数据</i></template>
             </span>
           </div>
           <div class="rev-line rev-line--total">
             <span class="rev-line-label">{{ revenueTotalLabel }}</span>
             <span class="rev-line-value mono">
-            <template v-if="revenueTotal != null">{{ fmtNum(revenueTotal) }}<i class="sum-unit">万元</i></template>
-            <template v-else>—<i class="sum-unit">无数据</i></template>
+              <template v-if="revenueTotal != null">{{ fmtNum(revenueTotal) }}<i class="ms-unit">万元</i></template>
+              <template v-else>—<i class="ms-unit">无数据</i></template>
             </span>
           </div>
         </div>
-      <div v-else class="sum-value muted">—<i class="sum-unit">无数据</i></div>
-      <div class="sum-sub">{{ revenuePeriod }}</div>
+        <div v-else class="ms-value muted">—<i class="ms-unit">无数据</i></div>
+        <div class="ms-sub">{{ revenuePeriod }}</div>
       </div>
 
-    <!-- ② 毛利率：新式口径（折扣后净进价），历史缺票期带标识 -->
-    <div class="sum-card">
-      <div class="sum-head">
-        <span class="sum-label">毛利率</span>
-        <span v-if="grossMargin && grossMargin.data_tag" class="sum-badge warn">{{ grossMargin.data_tag }}</span>
+      <div class="ms-card">
+        <div class="ms-detail-head"><span class="ms-label">毛利率口径</span></div>
+        <div class="ms-value mono" :class="{ muted: gmValue == null }">
+          <template v-if="gmValue != null">{{ gmValue.toFixed(2) }}<i class="ms-unit">%</i></template>
+          <template v-else>—<i class="ms-unit">无数据</i></template>
         </div>
-      <div class="sum-value mono" :class="{ muted: gmValue == null }">
-        <template v-if="gmValue != null">{{ gmValue.toFixed(2) }}<i class="sum-unit">%</i></template>
-        <template v-else>—<i class="sum-unit">无数据</i></template>
-      </div>
-      <div class="sum-sub">{{ gmSub }}</div>
+        <div class="ms-sub">{{ gmSub }}</div>
       </div>
 
-    <!-- ③ 战略目标达成率 -->
-    <div class="sum-card">
-      <div class="sum-head"><span class="sum-label">战略目标达成率</span></div>
-      <div class="sum-value mono" :class="achievement == null ? 'muted' : 'lv-' + achievementLevel">
-        <template v-if="achievement != null">{{ Math.round(achievement) }}<i class="sum-unit">%</i></template>
-        <template v-else>—<i class="sum-unit">无数据</i></template>
-      </div>
-      <div class="sum-sub">
+      <div class="ms-card">
+        <div class="ms-detail-head"><span class="ms-label">达成率 / 风险分布</span></div>
+        <div class="ms-sub">
           <template v-if="achievement != null">{{ achievementCount }} 个目标有实测值 · 其余无数据</template>
           <template v-else>所有目标均无可用 KPI 实测值</template>
         </div>
-    </div>
-
-    <!-- ④ 风险目标数 -->
-    <div class="sum-card">
-      <div class="sum-head"><span class="sum-label">风险目标</span></div>
-      <div class="sum-value mono" :class="riskCount == null ? 'muted' : (riskCount > 0 ? 'lv-red' : 'lv-green')">
-        <template v-if="riskCount != null">{{ riskCount }}</template>
-        <template v-else>—<i class="sum-unit">无数据</i></template>
-      </div>
-      <div class="sum-sub">
-        <template v-if="summary">达标 {{ summary.green }} · 关注 {{ summary.yellow }} · 共 {{ summary.total }} 个目标</template>
+        <div class="ms-sub">
+          <template v-if="summary">达标 {{ summary.green }} · 关注 {{ summary.yellow }} · 风险 {{ summary.red }} · 共 {{ summary.total }} 个目标</template>
           <template v-else>战略回顾数据未加载</template>
         </div>
       </div>
 
-    <!-- ⑤ 口径变更标识位 + 管理指标（非会计科目，单列、不占主位） -->
-    <div class="sum-foot">
-      <span v-if="switchInfo && switchInfo.has_switch" class="sum-badge warn" :title="switchInfo.note || ''">
+      <div class="ms-card">
+        <div class="ms-detail-head"><span class="ms-label">口径变更 / 管理指标</span></div>
+        <div class="ms-foot">
+          <span v-if="switchInfo && switchInfo.has_switch" class="ms-badge warn" :title="switchInfo.note || ''">
             {{ switchInfo.label }}<template v-if="switchInfo.effective_date"> · 自 {{ switchInfo.effective_date }}</template>
             <em v-if="switchInfo.comparability"> · {{ switchInfo.comparability }}</em>
           </span>
@@ -76,14 +135,16 @@
             <span class="mgmt-value mono">{{ m.value == null ? '—' : m.value.toFixed(2) + '%' }}</span>
             <span class="mgmt-tag">{{ m.tag }}</span>
             <span v-if="m.abnormal" class="mgmt-abnormal">异常·须核查</span>
-        <span class="mgmt-caliber">{{ fmtNum(m.numerator) }} ÷ {{ fmtNum(m.denominator) }}<template v-if="m.period"> · {{ m.period }}</template></span>
           </span>
+          <span v-if="!(switchInfo && switchInfo.has_switch) && management.length === 0" class="ms-sub">无口径变更与管理指标</span>
+        </div>
+      </div>
     </div>
   </section>
 </template>
 
 <script setup lang="ts">
-import { computed } from 'vue'
+import { computed, ref } from 'vue'
 
 type RevLine = { key: string; label: string; amount: number | null; unit?: string; missing_reason?: string | null }
 
@@ -122,8 +183,14 @@ const props = defineProps<{
   summary: { total: number; green: number; yellow: number; red: number; health_score?: number } | null
   switchInfo?: { has_switch?: boolean; label?: string; effective_date?: string | null; comparability?: string; note?: string } | null
   loading?: boolean
+  /** ⑤ 目标·连线：当前地图目标数（null ⇒ 显式「—」） */
+  objectivesTotal?: number | null
+  /** ⑤ 目标·连线：当前地图连线数（null ⇒ 显式「—」） */
+  connectionsTotal?: number | null
 }>()
 
+const detailOpen = ref(false)
+
 const revenueLines = computed<RevLine[]>(() => (props.revenue?.lines || []).filter(l => !!l && !!l.key))
 /** 合计 = 各线相加的复算校验位，不与分线并列成第二套口径 */
 const revenueTotal = computed<number | null>(() => {
@@ -163,92 +230,125 @@ function fmtNum(v: number | null | undefined): string {
 </script>
 
 <style scoped>
+/* C 方案：单行汇总条（行高 40px + 上下 1px 边框 ≤44px） */
 .map-summary {
-  display: grid;
-  grid-template-columns: repeat(4, minmax(0, 1fr));
-  gap: 10px;
   flex-shrink: 0;
-  margin-bottom: 10px;
-}
-.sum-card {
+  margin-bottom: 8px;
   background: var(--bh-bg-card, #fff);
   border: 1px solid var(--bh-border, #E5E7EB);
   border-radius: 8px;
-  padding: 10px 14px;
+  padding: 0 10px;
+}
+.ms-row {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  height: 40px;
   min-width: 0;
 }
-.sum-card--wide { grid-column: span 2; }
-.sum-head { display: flex; align-items: center; gap: 8px; min-width: 0; }
-.sum-label {
+.ms-metric {
+  display: flex;
+  align-items: baseline;
+  gap: 6px;
+  min-width: 0;
+  white-space: nowrap;
+}
+.ms-metric--rev { flex: 0 1 auto; overflow: hidden; }
+.ms-label {
   font-size: 12px;
   color: var(--bh-text-secondary, #64748B);
   letter-spacing: .02em;
-  white-space: nowrap;
+  flex-shrink: 0;
 }
-.sum-badge {
+.ms-value {
+  font-size: 17px;
+  font-weight: 700;
+  line-height: 1.1;
+  color: var(--bh-text-primary, #0F172A);
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+.ms-value.muted { font-size: 13px; color: var(--bh-text-muted, #94A3B8); font-weight: 500; }
+.ms-unit {
+  font-size: 10px;
+  font-weight: 500;
+  font-style: normal;
+  color: var(--bh-text-secondary, #64748B);
+  margin-left: 2px;
+}
+.ms-div { color: var(--bh-text-muted, #94A3B8); margin: 0 2px; }
+.ms-sep { width: 1px; height: 18px; background: var(--bh-border, #E5E7EB); flex-shrink: 0; }
+.ms-badge {
   font-size: 10px;
   line-height: 1.5;
-  padding: 1px 6px;
+  padding: 0 5px;
   border-radius: 4px;
+  border: 1px solid transparent;
   white-space: nowrap;
-  overflow: hidden;
-  text-overflow: ellipsis;
+  flex-shrink: 0;
 }
-.sum-badge.calm { color: #635BFF; background: rgba(99, 91, 255, .08); }
-.sum-badge.warn { color: #B45309; background: #FEF3C7; }
-.sum-badge.warn em { font-style: normal; }
-.sum-value {
-  margin-top: 4px;
-  font-size: 22px;
-  font-weight: 700;
-  line-height: 1.2;
-  color: var(--bh-text-primary, #0F172A);
-  display: flex;
-  align-items: baseline;
-  gap: 3px;
-}
-.sum-value.muted { font-size: 15px; color: var(--bh-text-muted, #94A3B8); font-weight: 500; }
-.sum-unit { font-size: 11px; font-weight: 500; font-style: normal; color: var(--bh-text-secondary, #64748B); margin-left: 2px; }
-.sum-sub {
-  margin-top: 4px;
-  font-size: 11px;
-  color: var(--bh-text-muted, #94A3B8);
-  white-space: nowrap;
-  overflow: hidden;
-  text-overflow: ellipsis;
-}
-.rev-lines { margin-top: 4px; display: flex; flex-direction: column; gap: 2px; }
-.rev-line { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; }
-.rev-line-label { font-size: 12px; color: var(--bh-text-secondary, #64748B); }
-.rev-line-value { font-size: 18px; font-weight: 700; color: var(--bh-text-primary, #0F172A); }
-.rev-line-value.muted { font-size: 14px; font-weight: 500; color: var(--bh-text-muted, #94A3B8); }
-.rev-line--total { border-top: 1px dashed var(--bh-border, #E5E7EB); padding-top: 3px; margin-top: 2px; }
-.rev-line--total .rev-line-label,
-.rev-line--total .rev-line-value { font-size: 12px; font-weight: 500; color: var(--bh-text-secondary, #64748B); }
-.sum-foot {
-  grid-column: 1 / -1;
-  display: flex;
-  flex-wrap: wrap;
+.ms-badge.calm { color: #0369A1; background: #F0F9FF; border-color: #BAE6FD; }
+.ms-badge.warn { color: #B45309; background: #FFFBEB; border-color: #FDE68A; }
+.ms-badge.warn em { font-style: normal; }
+.ms-detail-btn {
+  margin-left: auto;
+  flex-shrink: 0;
+  display: inline-flex;
   align-items: center;
-  gap: 6px 16px;
-  padding: 6px 12px;
-  border: 1px dashed var(--bh-border, #E5E7EB);
-  border-radius: 6px;
+  gap: 3px;
+  height: 24px;
+  padding: 0 8px;
   font-size: 11px;
-  color: var(--bh-text-muted, #94A3B8);
+  color: var(--bh-text-secondary, #64748B);
+  background: transparent;
+  border: 1px solid var(--bh-border, #E5E7EB);
+  border-radius: 6px;
+  cursor: pointer;
 }
-.mgmt { display: inline-flex; align-items: baseline; gap: 6px; }
+.ms-detail-btn:hover { color: #0F172A; border-color: #CBD5E1; }
+.ms-detail-btn svg { width: 12px; height: 12px; }
+
+/* 明细展开区 */
+.ms-detail {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
+  gap: 10px;
+  padding: 0 0 10px;
+}
+.ms-card {
+  border: 1px solid var(--bh-border, #E5E7EB);
+  border-radius: 8px;
+  padding: 8px 12px;
+  min-width: 0;
+  background: var(--bh-bg-subtle, #FCFCFD);
+}
+.ms-detail-head {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  margin-bottom: 4px;
+}
+.rev-lines { display: flex; flex-direction: column; gap: 2px; }
+.rev-line { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; min-width: 0; }
+.rev-line-label { font-size: 11px; color: var(--bh-text-secondary, #64748B); }
+.rev-line-value { font-size: 12px; color: var(--bh-text-primary, #0F172A); }
+.rev-line-value.muted { color: var(--bh-text-muted, #94A3B8); }
+.rev-line--total { border-top: 1px dashed var(--bh-border, #E5E7EB); margin-top: 2px; padding-top: 2px; }
+.ms-sub { margin-top: 4px; font-size: 11px; color: var(--bh-text-muted, #94A3B8); line-height: 1.5; }
+.ms-foot { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 12px; }
+.mgmt { display: inline-flex; align-items: baseline; gap: 4px; font-size: 11px; }
 .mgmt-label { color: var(--bh-text-secondary, #64748B); }
-.mgmt-value { font-size: 13px; font-weight: 700; color: var(--bh-text-primary, #0F172A); }
-.mgmt-tag { font-size: 10px; padding: 1px 5px; border-radius: 4px; background: #F1F5F9; color: #475569; }
-.mgmt-abnormal { color: #B91C1C; }
-.mgmt-caliber { color: var(--bh-text-muted, #94A3B8); }
+.mgmt-value { color: var(--bh-text-primary, #0F172A); font-weight: 600; }
+.mgmt-tag { font-size: 10px; padding: 0 4px; border-radius: 4px; background: #F1F5F9; color: #475569; }
+.mgmt-abnormal { font-size: 10px; color: #B91C1C; }
 .mono { font-family: 'IBM Plex Mono', Consolas, 'SFMono-Regular', monospace; font-variant-numeric: tabular-nums; }
 .lv-green { color: #00C896; }
 .lv-yellow { color: #F59E0B; }
 .lv-red { color: #EF4444; }
-@media (max-width: 1200px) {
-  .map-summary { grid-template-columns: repeat(2, minmax(0, 1fr)); }
-  .sum-card--wide { grid-column: span 2; }
+
+/* 窄屏：单行改为可横向滚动，保留全部 5 项、不换行不截断 */
+@media (max-width: 1280px) {
+  .ms-row { overflow-x: auto; }
 }
 </style>

frontend/src/components/strategy-map/StrategyLayer.vue

@@ -1,6 +1,17 @@
 <template>
   <div class="strategy-layer" :class="`layer-${layerKey}`" :style="{ borderColor: color }">
-    <div class="layer-header" :style="{ background: color }">
+    <div
+      class="layer-header"
+      :class="{ 'is-focusable': true, 'is-focused': focused }"
+      :style="{ background: color }"
+      :title="focused ? '再次点击退出聚焦，恢复四层等宽' : '点击聚焦该层（其余三层压成单行摘要）'"
+      role="button"
+      tabindex="0"
+      :aria-pressed="focused ? 'true' : 'false'"
+      @click="$emit('focus')"
+      @keydown.enter.prevent="$emit('focus')"
+      @keydown.space.prevent="$emit('focus')"
+    >
       <button
         type="button"
         class="layer-collapse-btn"
@@ -14,6 +25,12 @@
       </button>
       <span class="layer-icon">{{ icon }}</span>
       <span class="layer-name">{{ label }}</span>
+      <!-- 压缩态（C 方案聚焦模式）：保「目标数 + 达成率色条」，整层信息不全隐 -->
+      <span v-if="compact" class="layer-mini" :aria-label="'该层达成率 ' + ratioText">
+        <span class="mini-track"><i class="mini-fill" :style="{ width: ratioBarWidth }"></i></span>
+        <span class="mini-ratio mono">{{ ratioText }}</span>
+      </span>
+      <span v-if="focused" class="layer-focus-flag">聚焦中</span>
       <span class="layer-objective-count">{{ objectives.length }} 个目标</span>
       <el-dropdown trigger="click" @command="onLayerAction">
         <el-button class="layer-more-btn" size="small" text>
@@ -90,7 +107,7 @@
 </template>
 
 <script setup lang="ts">
-import { ref, reactive } from 'vue'
+import { ref, reactive, computed } from 'vue'
 import { MoreFilled } from '@element-plus/icons-vue'
 import draggable from 'vuedraggable'
 import MapNode from './MapNode.vue'
@@ -115,6 +132,12 @@ const props = defineProps<{
   dimmedKeys?: string[]
   /** 层折叠（仅隐藏层体，保留层头） */
   collapsed?: boolean
+  /** C 方案聚焦模式：其它层压成单行（层头 + 目标数 + 达成率色条） */
+  compact?: boolean
+  /** 该层达成率均值（无实测值传 null，界面显式「—」，不用示例数兜底） */
+  layerRatio?: number | null
+  /** 本层是否处于聚焦展开态 */
+  focused?: boolean
   getNodeLevel: (key: string) => string
   getNodeProgress: (key: string) => any
 }>()
@@ -138,8 +161,21 @@ const emit = defineEmits<{
   (e: 'edit-kr', payload: { dimKey: string; idx: number; obj: any; ki: number; kr: any }): void
   (e: 'delete-kr', payload: { dimKey: string; idx: number; obj: any; ki: number; kr: any }): void
   (e: 'add-kr', payload: { dimKey: string; idx: number; obj: any }): void
+  (e: 'focus'): void
 }>()
 
+/** 压缩态达成率文案：无实测值显式「—」，禁止示例数字兜底 */
+const ratioText = computed(() => {
+  const r = props.layerRatio
+  return r == null || Number.isNaN(Number(r)) ? '—' : `${Math.round(Number(r))}%`
+})
+/** 压缩态色条宽度（0–100%，无数据时 0 宽 + 灰色轨道） */
+const ratioBarWidth = computed(() => {
+  const r = Number(props.layerRatio)
+  if (props.layerRatio == null || Number.isNaN(r)) return '0%'
+  return `${Math.max(0, Math.min(100, Math.round(r)))}%`
+})
+
 const bodyRef = ref<HTMLElement | null>(null)
 
 // Node DOM refs for line calculation (reactive so parent can aggregate)
@@ -251,6 +287,54 @@ export default {
   letter-spacing: 0.3px;
 }
 
+/* C 方案：层头可点击聚焦 */
+.layer-header.is-focusable { cursor: pointer; }
+.layer-header.is-focusable:focus-visible {
+  outline: 2px solid #fff;
+  outline-offset: -3px;
+}
+.layer-header.is-focused { box-shadow: inset 0 -2px 0 rgba(255, 255, 255, 0.55); }
+
+.layer-focus-flag {
+  font-size: 10px;
+  font-weight: 500;
+  letter-spacing: .04em;
+  padding: 1px 6px;
+  border-radius: 4px;
+  background: rgba(255, 255, 255, 0.24);
+  flex-shrink: 0;
+}
+
+/* 压缩单行态：达成率色条 + 百分比（保信息不全隐） */
+.layer-mini {
+  display: inline-flex;
+  align-items: center;
+  gap: 6px;
+  flex-shrink: 0;
+  min-width: 96px;
+}
+.mini-track {
+  width: 56px;
+  height: 4px;
+  border-radius: 2px;
+  background: rgba(255, 255, 255, 0.28);
+  overflow: hidden;
+  display: inline-block;
+}
+.mini-fill {
+  display: block;
+  height: 100%;
+  border-radius: 2px;
+  background: #fff;
+  transition: width .2s ease;
+}
+.mini-ratio {
+  font-size: 11px;
+  font-weight: 600;
+  font-variant-numeric: tabular-nums;
+  opacity: .95;
+}
+
 .layer-icon {
   font-size: 18px;
   line-height: 1;

frontend/src/views/MapCanvas.vue

@@ -34,6 +34,8 @@
       :achievement-count="achievementCount"
       :summary="reviewSummary"
       :loading="loading"
+      :objectives-total="totalObjectiveCount"
+      :connections-total="connections.length"
     />
 
     <MapEditBar
@@ -43,6 +45,7 @@
       :layer-configs="layerUiConfigs"
       :can-undo="undoStack.length > 0"
       :tree-open="treeOpen"
+      :focus-layer="focusLayer"
       @update:search="v => searchText = v"
       @update:filter="v => filterMode = v"
       @toggle-layer="toggleLayer"
@@ -52,6 +55,7 @@
       @fit="zoomFit"
       @toggle-tree="treeOpen = !treeOpen"
       @completeness="showCompleteness = true"
+      @focus-layer="toggleFocusLayer"
     />
 
     <!-- 口径标识（常驻，非 hover 临时提示）：A 口径 v1.1 来自会计科目、非发票同票列明 -->
@@ -80,7 +84,7 @@
       <el-button size="small" @click="cancelLink">取消</el-button>
     </div>
 
-    <!-- 仪表盘主视图：左目标树 / 中画布 / 右详情 -->
+    <!-- 仪表盘主视图：左目标树（默认收起，留 46px 图标条）/ 中画布 / 详情浮层 -->
     <div class="map-body-row">
       <MapTargetTree
         v-show="treeOpen"
@@ -98,6 +102,22 @@
         @drag-end="onTreeDragEnd"
       />
 
+      <!-- 目标树收起后的 46px 图标条（C 方案：默认收起，一键展开） -->
+      <div v-show="!treeOpen" class="tree-rail" aria-label="目标树已收起">
+        <button
+          type="button"
+          class="rail-btn"
+          title="展开目标树"
+          aria-label="展开目标树"
+          @click="treeOpen = true"
+        >
+          <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.6" aria-hidden="true">
+            <path d="M4 6h6M4 12h6M4 18h6" /><path d="M14 6h6M14 12h6M14 18h6" opacity=".45" />
+          </svg>
+        </button>
+        <span class="rail-count mono" :title="'当前可见目标 / 总目标'">{{ visibleObjectiveCount }}</span>
+      </div>
+
       <div class="map-canvas-col">
     <!-- 画布主体（田字格2×2布局，transform: scale 缩放） -->
     <div
@@ -108,7 +128,7 @@
       @drop.prevent="onTreeDrop"
     >
       <div class="canvas-zoom-wrap" :style="{ width: zoomWrapWidth, height: zoomWrapHeight }">
-      <div class="canvas-body" :class="{ 'grid-mode': gridMode }" ref="bodyRef" :style="bodyZoomStyle">
+      <div class="canvas-body" :class="{ 'grid-mode': gridMode, 'focus-active': !!focusLayer }" ref="bodyRef" :style="bodyZoomStyle">
         <!-- 四层泳道（纵向排列，固定顺序：财务→客户→流程→学习） -->
         <div
           v-for="(cfg, idx) in orderedLayerConfigs"
@@ -116,6 +136,10 @@
           v-show="visibleLayers[cfg.key]"
           :ref="el => setLayerRef(cfg.key, el)"
           class="layer-swimlane-wrapper"
+          :class="{
+            'is-focused': focusLayer === cfg.key,
+            'is-compact': !!focusLayer && focusLayer !== cfg.key,
+          }"
           :style="{ borderLeft: '4px solid ' + layerColor(cfg.key) }"
         >
           <StrategyLayer
@@ -126,6 +150,10 @@
             :color="layerColor(cfg.key)"
             :objectives="getLayerNodes(cfg.key)"
             :collapsed="!!collapsedLayers[cfg.key]"
+            :compact="!!focusLayer && focusLayer !== cfg.key"
+            :focused="focusLayer === cfg.key"
+            :layer-ratio="layerStats[cfg.key] ? layerStats[cfg.key].ratio : null"
+            @focus="toggleFocusLayer(cfg.key)"
             :dim-active="filterActive"
             :dimmed-keys="matchedKeyList"
             @toggle-collapse="toggleLayerCollapse(cfg.key)"
@@ -174,10 +202,40 @@
           <span class="lg-item"><i class="lg-dot lv-gray"></i>无数据</span>
           <span class="lg-note">达成率按指标方向归一，取目标关联 KPI 均值</span>
         </div>
-      </div><!-- end map-canvas-col -->
 
-      <MapNodeDetail
+        <!-- 跨层关系摘要条（C 方案）：数字由 connections 的 from/to 现算，不写死 -->
+        <div class="cross-summary" aria-label="跨层关系摘要">
+          <span class="cs-title">跨层关系摘要</span>
+          <span v-for="item in crossSummary" :key="item.key" class="cs-item">
+            <i class="cs-dot" :style="{ background: item.color }"></i>
+            <span class="cs-label">{{ item.label }}</span>
+            <b class="cs-num mono">{{ item.count }}</b>
+          </span>
+          <span class="cs-total">
+            合计 <b class="mono">{{ connections.length }}</b> 条 · 跨层 <b class="mono">{{ crossLayerCount }}</b> 条 · 同层 <b class="mono">{{ sameLayerCount }}</b> 条
+          </span>
+        </div>
+      </div><!-- end map-canvas-col -->
+    </div><!-- end map-body-row -->
+
+    <!-- 详情浮层（C 方案）：右栏不再常驻占位，画布按视口 100% 宽；浮层可拖动、可关闭 -->
+    <div
       v-if="selectedNode"
+      class="detail-float"
+      :style="{ left: floatPos.x + 'px', top: floatPos.y + 'px' }"
+      role="dialog"
+      aria-label="目标详情浮层"
+    >
+      <div class="float-bar" @mousedown="startFloatDrag">
+        <span class="float-bar-grip" aria-hidden="true">
+          <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M8 8h.01M8 12h.01M8 16h.01M16 8h.01M16 12h.01M16 16h.01" /></svg>
+        </span>
+        <span class="float-bar-title">拖动可移动</span>
+        <button type="button" class="float-bar-close" aria-label="关闭详情浮层" @click="closeDetail">
+          <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" aria-hidden="true"><path d="M6 6l12 12M18 6L6 18" /></svg>
+        </button>
+      </div>
+      <MapNodeDetail
         :obj="selectedNode.obj"
         :dim-key="selectedNode.dimKey"
         :index="selectedNode.index"
@@ -196,13 +254,7 @@
         @select-key="selectByKey"
         @go-kpi-library="goKpiLibrary"
       />
-      <aside v-else class="map-detail-empty" aria-label="目标详情占位">
-        <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5" aria-hidden="true">
-          <rect x="3" y="4" width="18" height="16" rx="2" /><path d="M7 9h10M7 13h7M7 17h4" />
-        </svg>
-        <p>选中左侧目标或画布节点<br />查看达成率、KPI 与因果上下游</p>
-      </aside>
-    </div><!-- end map-body-row -->
+    </div>
 
     <!-- SVG 连线层（覆盖整个画布，绘制跨层+同层箭头） -->
     <ConnectionLines
@@ -211,7 +263,7 @@
       :node-refs="compiledNodeRefs"
       :layer-keys="layerKeysOrdered"
       :conn-keys="connKeys"
-      :connections="connections"
+      :connections="renderedConnections"
       :temp-line="tempLine"
       :container-key="recalcTrigger"
       :view-direction="viewDirection"
@@ -390,7 +442,35 @@ const filterMode = ref<'all' | 'risk' | 'nodata'>('all')
 const visibleLayers = reactive<Record<string, boolean>>({ finance: true, customer: true, process: true, learning: true })
 const collapsedLayers = reactive<Record<string, boolean>>({})
 const collapsedGroups = reactive<Record<string, boolean>>({})
-const treeOpen = ref(true)
+
+/* ── C 方案：目标树默认收起 + 记住上次选择（localStorage 键名 cma.map.canvas.treeOpen）── */
+const TREE_OPEN_STORAGE_KEY = 'cma.map.canvas.treeOpen'
+function readTreeOpenPref(): boolean {
+  try {
+    return localStorage.getItem(TREE_OPEN_STORAGE_KEY) === '1'
+  } catch {
+    return false
+  }
+}
+const treeOpen = ref<boolean>(readTreeOpenPref())
+watch(treeOpen, (v) => {
+  try {
+    localStorage.setItem(TREE_OPEN_STORAGE_KEY, v ? '1' : '0')
+  } catch {
+    /* 隐私模式/配额满：静默降级为不记忆，不影响画布功能 */
+  }
+})
+
+/* ── C 方案：聚焦模式（null = 四层全景；非 null = 该层展开、其余三层压成单行）── */
+const focusLayer = ref<string | null>(null)
+function toggleFocusLayer(key: string | null) {
+  focusLayer.value = !key || focusLayer.value === key ? null : key
+  nextTick(() => {
+    updateGridMode()
+    triggerRecalc()
+    updateZoomWrapHeight()
+  })
+}
 
 const selectedNode = ref<{ dimKey: string; index: number; obj: any } | null>(null)
 const selectedKey = computed(() => (selectedNode.value ? `${selectedNode.value.dimKey}-${selectedNode.value.index}` : null))
@@ -525,6 +605,112 @@ const achievementCount = computed(() =>
   Object.values(kpiProgressMap).filter((p: any) => p.hasData && p.ratio != null).length
 )
 
+/** 各层达成率均值（聚焦压缩态色条用）：仅统计有实测值的目标，无数据 ⇒ null（界面显式「—」） */
+const layerStats = computed<Record<string, { ratio: number | null; count: number }>>(() => {
+  const out: Record<string, { ratio: number | null; count: number }> = {}
+  for (const cfg of orderedLayerConfigs) {
+    const objs = getLayerNodes(cfg.key)
+    const vals: number[] = []
+    objs.forEach((_: any, i: number) => {
+      const p: any = kpiProgressMap[`${cfg.key}-${i}`]
+      if (p && p.hasData && p.ratio != null && !Number.isNaN(Number(p.ratio))) vals.push(Number(p.ratio))
+    })
+    out[cfg.key] = { ratio: vals.length ? vals.reduce((a, b) => a + b, 0) / vals.length : null, count: objs.length }
+  }
+  return out
+})
+
+/* ── C 方案：跨层关系摘要（全部由 connections 的 from/to 现算，禁写死）──
+ * 连线端点兼容两种键：渲染键 `finance-0` 与数据键 `learning:目标名`（StrategyLayer 双键注册）。
+ */
+function layerOfNodeKey(key: string | null | undefined): string | null {
+  if (!key || typeof key !== 'string') return null
+  const sep = key.includes(':') ? ':' : '-'
+  const layer = key.split(sep)[0]
+  return LAYER_KEYS.includes(layer as any) ? layer : null
+}
+const layerHue = (key: string) => LAYER_VISUAL[key]?.color || LAYER_CONFIG[key]?.color || '#635BFF'
+/** 聚焦态只绘制聚焦层内部的同层连线（跨层线跨向被压缩层时无锚点）；全景态全量绘制 */
+const renderedConnections = computed<any[]>(() => {
+  const f = focusLayer.value
+  if (!f) return connections.value
+  return connections.value.filter(
+    (c: any) => layerOfNodeKey(c?.from) === f && layerOfNodeKey(c?.to) === f
+  )
+})
+const crossLayerCount = computed(() =>
+  connections.value.filter((c: any) => {
+    const f = layerOfNodeKey(c?.from)
+    const t = layerOfNodeKey(c?.to)
+    return !!f && !!t && f !== t
+  }).length
+)
+const sameLayerCount = computed(() => connections.value.length - crossLayerCount.value)
+/** BSC 三段因果 + 「其他跨层」兜底桶 + 同层；合计必须等于 connections.length */
+const crossSummary = computed(() => {
+  const dirs: { key: string; label: string; from: string; to: string }[] = [
+    { key: 'learn2proc', label: '学习→流程', from: 'learning', to: 'process' },
+    { key: 'proc2cust', label: '流程→客户', from: 'process', to: 'customer' },
+    { key: 'cust2fin', label: '客户→财务', from: 'customer', to: 'finance' },
+  ]
+  const counts: Record<string, number> = {}
+  let other = 0
+  for (const c of connections.value as any[]) {
+    const f = layerOfNodeKey(c?.from)
+    const t = layerOfNodeKey(c?.to)
+    if (!f || !t || f === t) continue
+    const hit = dirs.find(d => d.from === f && d.to === t)
+    if (hit) {
+      counts[hit.key] = (counts[hit.key] || 0) + 1
+    } else {
+      other++
+    }
+  }
+  const items = dirs.map(d => ({
+    key: d.key,
+    label: d.label,
+    count: counts[d.key] || 0,
+    color: layerHue(d.to),
+  }))
+  if (other > 0) items.push({ key: 'other', label: '其他跨层', count: other, color: '#94A3B8' })
+  return items
+})
+
+/* ── C 方案：详情浮层位置与拖动（自绘 div + transform，非 el-dialog）── */
+const floatPos = ref<{ x: number; y: number }>({ x: 0, y: 0 })
+const floatDragging = ref(false)
+let floatDragOffset = { x: 0, y: 0 }
+const FLOAT_W = 360
+function clampFloat(x: number, y: number) {
+  const maxX = Math.max(8, window.innerWidth - FLOAT_W - 12)
+  const maxY = Math.max(8, window.innerHeight - 120)
+  return { x: Math.min(Math.max(8, x), maxX), y: Math.min(Math.max(8, y), maxY) }
+}
+/** 默认落位：右侧靠上（不遮挡左侧层名与中部卡片） */
+function placeFloatDefault() {
+  floatPos.value = clampFloat(window.innerWidth - FLOAT_W - 24, 132)
+}
+function startFloatDrag(e: MouseEvent) {
+  floatDragging.value = true
+  floatDragOffset = { x: e.clientX - floatPos.value.x, y: e.clientY - floatPos.value.y }
+  window.addEventListener('mousemove', onFloatDragMove)
+  window.addEventListener('mouseup', stopFloatDrag)
+  e.preventDefault()
+}
+function onFloatDragMove(e: MouseEvent) {
+  if (!floatDragging.value) return
+  floatPos.value = clampFloat(e.clientX - floatDragOffset.x, e.clientY - floatDragOffset.y)
+}
+function stopFloatDrag() {
+  floatDragging.value = false
+  window.removeEventListener('mousemove', onFloatDragMove)
+  window.removeEventListener('mouseup', stopFloatDrag)
+}
+watch(selectedNode, (v) => {
+  if (v && !floatPos.value.x && !floatPos.value.y) placeFloatDefault()
+})
+onUnmounted(() => stopFloatDrag())
+
 /** 搜索/筛选是否激活（激活时画布非匹配节点变淡） */
 const filterActive = computed(() => searchText.value.trim() !== '' || filterMode.value !== 'all')
 
@@ -2176,6 +2362,140 @@ onUnmounted(() => {
   margin-bottom: 4px;
 }
 
+/* ── C 方案：聚焦模式 ── */
+/* 聚焦层：田字格下占满整行，卡片网格展开 */
+.canvas-body.grid-mode .layer-swimlane-wrapper.is-focused {
+  grid-column: 1 / -1;
+}
+/* 其余三层：压成单行（≤48px，仅层头 + 目标数 + 达成率色条） */
+.canvas-body.focus-active .layer-swimlane-wrapper.is-compact {
+  height: 48px;
+  min-height: 48px;
+  max-height: 48px;
+  overflow: hidden;
+  align-self: start;
+}
+.canvas-body.focus-active .layer-swimlane-wrapper.is-compact :deep(.strategy-layer) {
+  min-height: 0;
+  height: 48px;
+}
+.canvas-body.focus-active .layer-swimlane-wrapper.is-compact :deep(.layer-body) {
+  display: none;
+}
+.canvas-body.focus-active .layer-swimlane-wrapper.is-compact :deep(.layer-header) {
+  padding: 6px 14px;
+  gap: 8px;
+}
+.canvas-body.focus-active .layer-swimlane-wrapper.is-focused :deep(.strategy-layer) {
+  box-shadow: 0 6px 18px rgba(15, 23, 42, 0.10);
+}
+
+/* ── 目标树收起后的 46px 图标条 ── */
+.tree-rail {
+  width: 46px;
+  flex: 0 0 46px;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: 8px;
+  padding: 8px 0;
+  border: 1px solid var(--bh-border, #E5E7EB);
+  border-radius: 8px;
+  background: var(--bh-bg-card, #fff);
+}
+.rail-btn {
+  width: 30px;
+  height: 30px;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  border: 1px solid var(--bh-border, #E5E7EB);
+  border-radius: 6px;
+  background: #F8FAFC;
+  color: #475569;
+  cursor: pointer;
+}
+.rail-btn:hover { background: #EEF2F7; color: #0F172A; }
+.rail-btn svg { width: 16px; height: 16px; }
+.rail-count {
+  font-size: 11px;
+  color: var(--bh-text-secondary, #64748B);
+  font-variant-numeric: tabular-nums;
+}
+
+/* ── 详情浮层（自绘 div，可拖动，非 el-dialog） ── */
+.detail-float {
+  position: absolute;
+  z-index: 60;
+  width: 360px;
+  max-height: calc(100vh - 180px);
+  display: flex;
+  flex-direction: column;
+  background: var(--bh-bg-card, #fff);
+  border: 1px solid #E5E7EB;
+  border-radius: 10px;
+  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.16), 0 2px 6px rgba(15, 23, 42, 0.08);
+  overflow: hidden;
+}
+.detail-float :deep(.node-detail) {
+  width: 100%;
+  flex: 1 1 auto;
+  border: 0;
+  border-radius: 0;
+  overflow: auto;
+}
+.float-bar {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  height: 28px;
+  padding: 0 8px;
+  background: #F8FAFC;
+  border-bottom: 1px solid #E5E7EB;
+  cursor: move;
+  user-select: none;
+  flex-shrink: 0;
+}
+.float-bar-grip { display: inline-flex; color: #94A3B8; }
+.float-bar-grip svg { width: 14px; height: 14px; }
+.float-bar-title { font-size: 11px; color: #94A3B8; flex: 1; }
+.float-bar-close {
+  width: 20px;
+  height: 20px;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  border: 0;
+  background: transparent;
+  color: #64748B;
+  border-radius: 4px;
+  cursor: pointer;
+}
+.float-bar-close:hover { background: #E2E8F0; color: #0F172A; }
+.float-bar-close svg { width: 12px; height: 12px; }
+
+/* ── 跨层关系摘要条 ── */
+.cross-summary {
+  flex-shrink: 0;
+  display: flex;
+  align-items: center;
+  gap: 14px;
+  flex-wrap: nowrap;
+  overflow-x: auto;
+  padding: 6px 2px 0;
+  font-size: 11px;
+  color: #475569;
+  border-top: 1px dashed var(--bh-border, #E5E7EB);
+  margin-top: 4px;
+}
+.cs-title { color: #94A3B8; flex-shrink: 0; }
+.cs-item { display: inline-flex; align-items: center; gap: 4px; flex-shrink: 0; }
+.cs-dot { width: 7px; height: 7px; border-radius: 2px; display: inline-block; }
+.cs-label { color: #64748B; }
+.cs-num { color: #0F172A; font-variant-numeric: tabular-nums; }
+.cs-total { margin-left: auto; color: #64748B; flex-shrink: 0; }
+.cs-total b { color: #0F172A; }
+
 /* ── 跨层箭头指示器 ── */
 .cross-layer-arrow {
   display: flex;