diff --git a/assets/style.css b/assets/style.css
index ac9258e..47c4106 100644
--- a/assets/style.css
+++ b/assets/style.css
@@ -1253,9 +1253,19 @@ video.video-thumb.video-thumb-mini {
 .lightbox-file-dl { display: inline-block; }
 
 /* ── 20. 活动页路线地图（批 10）──────────────────────────────────────────── */
-.route-map-section { margin-top: 28px; }
+/* 批 12：详情页标签页 —— 地图独占一页、尽量大；节点详情切到另一页 */
+.route-tabs { display: flex; gap: 8px; margin: 0 0 14px; }
+.route-tab {
+    border: 1px solid var(--border); background: var(--surface);
+    border-radius: 999px; padding: 8px 18px; font-size: 14px;
+    cursor: pointer; color: var(--text-soft);
+}
+.route-tab:hover { border-color: var(--border-strong); color: var(--text); }
+.route-tab.is-active { background: var(--accent); border-color: var(--accent); color: #fff; }
+.route-panel[hidden] { display: none; }
+.route-map-section { margin-top: 0; }
 .route-map {
-    height: 380px;
+    height: clamp(480px, 72vh, 860px);
     border: 1px solid var(--border);
     border-radius: var(--radius);
     overflow: hidden;
@@ -1290,5 +1300,6 @@ video.video-thumb.video-thumb-mini {
 }
 .route-legend-end { color: #ef4444; font-weight: 700; }
 @media (max-width: 640px) {
-    .route-map { height: 300px; }
+    .route-map { height: 62vh; }
+    .route-tab { padding: 7px 14px; font-size: 13px; }
 }
diff --git a/templates/activities/show.php b/templates/activities/show.php
index 68d2559..d8cab65 100644
--- a/templates/activities/show.php
+++ b/templates/activities/show.php
@@ -67,18 +67,87 @@ foreach (($realityNodes ?? []) as $rn) {
 }
 ?>
 <?php if ($routeNodes !== []): ?>
-<section class="route-map-section">
-    <h2 class="section-title" id="route-map">🗺️ 行程路线</h2>
-    <div class="route-map" id="route-map-canvas"
-         data-route="<?= e(json_encode($routeNodes, JSON_UNESCAPED_UNICODE)) ?>"></div>
-    <p class="muted route-map-hint">
-        按时间顺序连出的执行节点路线（节点间虚线衔接），圆标在每段行程的中间，点它可打开对应节点。
-        <span class="route-legend-end">红点</span> = 到达地。只有地名没坐标的地点会自动向高德查询定位，太偏僻的地名可能查不到。
-    </p>
-</section>
+<div class="route-tabs" role="tablist" aria-label="行程地图与节点详情切换">
+    <button type="button" class="route-tab is-active" data-panel="route-panel-map"
+            aria-selected="true">🗺️ 行程地图</button>
+    <button type="button" class="route-tab" data-panel="route-panel-nodes"
+            aria-selected="false">📋 计划与实际</button>
+</div>
+<div class="route-panel" id="route-panel-map">
+    <section class="route-map-section">
+        <div class="route-map" id="route-map-canvas"
+             data-route="<?= e(json_encode($routeNodes, JSON_UNESCAPED_UNICODE)) ?>"></div>
+        <p class="muted route-map-hint">
+            按时间顺序连出的执行节点路线（节点间虚线衔接），圆标在每段行程的中间，点它可打开对应节点。
+            <span class="route-legend-end">红点</span> = 到达地。只有地名没坐标的地点会自动向高德查询定位，太偏僻的地名可能查不到。
+        </p>
+    </section>
+</div>
+<div class="route-panel" id="route-panel-nodes" hidden>
+<?php endif; ?>
+
+<div class="timeline-grid">
+    <section class="timeline-col">
+        <h2>📋 计划 (<?= count($planNodes) ?>)</h2>
+        <?php if (empty($planNodes)): ?>
+            <p class="muted">暂无计划节点</p>
+        <?php else: ?>
+            <?php foreach ($planNodes as $n): ?>
+                <?php $cardCategory = 'plan'; require __DIR__ . '/_node_card.php'; ?>
+            <?php endforeach; ?>
+        <?php endif; ?>
+    </section>
+
+    <section class="timeline-col">
+        <h2>🎬 实际 (<?= count($realityNodes) ?>)</h2>
+        <?php if (empty($realityNodes)): ?>
+            <p class="muted">暂无执行节点</p>
+        <?php else: ?>
+            <?php foreach ($realityNodes as $n): ?>
+                <?php $cardCategory = 'reality'; require __DIR__ . '/_node_card.php'; ?>
+            <?php endforeach; ?>
+        <?php endif; ?>
+    </section>
+</div>
+
+
+<?php
+$commentTargetType = \App\Comments::TARGET_ACTIVITY;
+$commentTargetId   = (int)$activity['id'];
+require dirname(__DIR__) . '/comments/_block.php';
+?>
+
+<?php if ($routeNodes !== []): ?>
+</div>
 <script>
 (function () {
     'use strict';
+    /* ── 标签页切换：行程地图 / 计划与实际 ──────────────────────
+       地图标签默认打开（地图是主视图）；切回来时重新 setFitView，
+       因为容器隐藏期间尺寸没有意义。 */
+    var tabs = Array.prototype.slice.call(document.querySelectorAll('.route-tab'));
+    var panels = {
+        'route-panel-map': document.getElementById('route-panel-map'),
+        'route-panel-nodes': document.getElementById('route-panel-nodes'),
+    };
+    var map = null;   // 下面初始化后挂进来，供切换标签时重新适配视野
+    tabs.forEach(function (btn) {
+        btn.addEventListener('click', function () {
+            tabs.forEach(function (b) {
+                var on = (b === btn);
+                b.classList.toggle('is-active', on);
+                b.setAttribute('aria-selected', on ? 'true' : 'false');
+            });
+            Object.keys(panels).forEach(function (id) {
+                if (panels[id]) panels[id].hidden = (id !== btn.getAttribute('data-panel'));
+            });
+            if (btn.getAttribute('data-panel') === 'route-panel-map' && map) {
+                map.setFitView(null, false, [50, 50, 50, 50]);
+            }
+        });
+    });
+
+    /* ── 路线地图（AMap 2.0，layout.php 已全局加载）────────────── */
     var el = document.getElementById('route-map-canvas');
     if (!el) return;
 
@@ -95,7 +164,7 @@ foreach (($realityNodes ?? []) as $rn) {
     }
     if (!route.length) return;
 
-    var map = new AMap.Map(el, { viewMode: '2D', zoom: 5 });
+    map = new AMap.Map(el, { viewMode: '2D', zoom: 5 });
     var overlays = [];   // 当前画上去的所有覆盖物；地理编码补点后整体重画
 
     /* 全量重画：先清掉旧覆盖物再按当前 route 数据画。
@@ -113,10 +182,13 @@ foreach (($realityNodes ?? []) as $rn) {
             if (s && en) inPath.push([s.lng, s.lat], [en.lng, en.lat]);
             if (s && prevEnd) hopPath.push([prevEnd.lng, prevEnd.lat], [s.lng, s.lat]);
 
-            /* 圆形标记放这段行程线的中点（起终点都有才取中点），缺一头就放有的一头 */
+            /* 圆形标记放这段行程线的中点（起终点都有才取中点），缺一头就放有的一头。
+               ⚠️ position 必须是 [lng, lat] 数组 —— 把 {lng,lat} 对象直接传给
+               AMap 会抛 Invalid Object，forEach 当场中断、整张地图一个覆盖物
+               都不剩（批 11 上线后踩的坑，光秃秃地图就是它）。 */
             var pos = (s && en)
                 ? [(s.lng + en.lng) / 2, (s.lat + en.lat) / 2]
-                : (s || en);
+                : (s ? [s.lng, s.lat] : (en ? [en.lng, en.lat] : null));
             if (pos) {
                 var html = '<div class="route-marker" title="' + n.title.replace(/"/g, '&quot;') + '">'
                     + (n.img
@@ -188,34 +260,3 @@ foreach (($realityNodes ?? []) as $rn) {
 })();
 </script>
 <?php endif; ?>
-
-<div class="timeline-grid">
-    <section class="timeline-col">
-        <h2>📋 计划 (<?= count($planNodes) ?>)</h2>
-        <?php if (empty($planNodes)): ?>
-            <p class="muted">暂无计划节点</p>
-        <?php else: ?>
-            <?php foreach ($planNodes as $n): ?>
-                <?php $cardCategory = 'plan'; require __DIR__ . '/_node_card.php'; ?>
-            <?php endforeach; ?>
-        <?php endif; ?>
-    </section>
-
-    <section class="timeline-col">
-        <h2>🎬 实际 (<?= count($realityNodes) ?>)</h2>
-        <?php if (empty($realityNodes)): ?>
-            <p class="muted">暂无执行节点</p>
-        <?php else: ?>
-            <?php foreach ($realityNodes as $n): ?>
-                <?php $cardCategory = 'reality'; require __DIR__ . '/_node_card.php'; ?>
-            <?php endforeach; ?>
-        <?php endif; ?>
-    </section>
-</div>
-
-
-<?php
-$commentTargetType = \App\Comments::TARGET_ACTIVITY;
-$commentTargetId   = (int)$activity['id'];
-require dirname(__DIR__) . '/comments/_block.php';
-?>