diff --git a/templates/radar_guangzhou.html b/templates/radar_guangzhou.html
index ca0032c..b6be512 100644
--- a/templates/radar_guangzhou.html
+++ b/templates/radar_guangzhou.html
@@ -35,7 +35,7 @@
     </div>
   </div>
   <div class="card mb-4">
-    <div class="text-lg font-semibold mb-2">最新 7/40/104 瓦片信息</div>
+    <div class="text-lg font-semibold mb-2">7/40/104 瓦片信息</div>
     <div class="text-sm space-y-1">
       <div>时间：<span id="dt" class="font-mono"></span></div>
       <div>索引：z=<span id="z"></span> / y=<span id="y"></span> / x=<span id="x"></span></div>
@@ -46,7 +46,7 @@
   </div>
 
   <div class="card mb-4">
-    <div class="text-lg font-semibold mb-2">最新雷达站气象（广州雷达站，金山楼顶坐标）</div>
+    <div class="text-lg font-semibold mb-2">雷达站气象（广州雷达站，金山楼顶坐标）</div>
     <div id="rtInfo" class="text-sm grid grid-cols-2 gap-y-1 gap-x-6">
       <div>站点：<span id="rt_alias"></span></div>
       <div>位置：<span id="rt_lat"></span>，<span id="rt_lon"></span></div>
@@ -83,6 +83,9 @@
         <button id="btnNext" class="px-2 py-1 border rounded">下一时次</button>
       </div>
     </div>
+    <div class="w-full flex justify-center mb-2">
+      <input id="timeSlider" type="range" min="0" max="0" value="0" step="1" class="slider slider-horizontal w-64" />
+    </div>
     <div id="radarPlot" class="plot-box"></div>
   </div>
 
@@ -148,7 +151,11 @@
       gTimes = j.times || [];
       gTimes.forEach(dt=>{ const opt=document.createElement('option'); opt.value=dt; opt.textContent=dt; sel.appendChild(opt); });
       if (gTimes.length>0 && gCurrentIdx<0){ sel.value=gTimes[0]; gCurrentIdx=0; }
-      updateCountAndButtons();
+      updateCountAndButtons(); updateSlider();
+      const shown = document.getElementById('dt').textContent;
+      if (gTimes.length>0 && gTimes[gCurrentIdx] && gTimes[gCurrentIdx] !== shown) {
+        await loadTileAt(gTimes[gCurrentIdx]);
+      }
     }catch{}
   }
 
@@ -170,7 +177,7 @@
     const selBox = document.getElementById('timeSelect');
     for(let i=0;i<selBox.options.length;i++){ if(selBox.options[i].value===t.dt){ selBox.selectedIndex=i; break; } }
     gCurrentIdx = gTimes.indexOf(t.dt);
-    updateCountAndButtons();
+    updateCountAndButtons(); updateSlider();
 
     // x/y 等角坐标
     const w=t.width,h=t.height; gTileValues=t.values;
@@ -329,7 +336,7 @@
     const v=e.target.value;
     if(!v){ if(gTimes.length>0){ gCurrentIdx=0; await loadTileAt(gTimes[0]); } else { gCurrentIdx=-1; await loadLatestTile(); } }
     else { gCurrentIdx=gTimes.indexOf(v); await loadTileAt(v); }
-    updateCountAndButtons();
+    updateCountAndButtons(); updateSlider();
   });
   document.getElementById('tsQuery').addEventListener('click', async ()=>{ const s=fromDTLocalInput(document.getElementById('tsStart').value); const e=fromDTLocalInput(document.getElementById('tsEnd').value); await populateTimes(s,e); });
   function updateCountAndButtons(){
@@ -338,11 +345,33 @@
     prev.disabled = !(N>0 && gCurrentIdx>=0 && gCurrentIdx<N-1);
     next.disabled = !(N>0 && gCurrentIdx>0);
   }
+  function updateSlider(){
+    const slider = document.getElementById('timeSlider');
+    const N = gTimes.length;
+    slider.max = N > 0 ? String(N-1) : '0';
+    if (N > 0 && gCurrentIdx >= 0) {
+      const sliderVal = (N - 1) - gCurrentIdx; // 值越大越新
+      slider.value = String(sliderVal);
+    }
+    slider.disabled = N === 0;
+  }
   document.getElementById('btnPrev').addEventListener('click', async ()=>{
-    if(gTimes.length===0) return; if(gCurrentIdx<0) gCurrentIdx=0; if(gCurrentIdx<gTimes.length-1){ gCurrentIdx++; const dt=gTimes[gCurrentIdx]; document.getElementById('timeSelect').value=dt; await loadTileAt(dt);} updateCountAndButtons();
+    if(gTimes.length===0) return; if(gCurrentIdx<0) gCurrentIdx=0; if(gCurrentIdx<gTimes.length-1){ gCurrentIdx++; const dt=gTimes[gCurrentIdx]; document.getElementById('timeSelect').value=dt; await loadTileAt(dt);} updateCountAndButtons(); updateSlider();
   });
   document.getElementById('btnNext').addEventListener('click', async ()=>{
-    if(gTimes.length===0) return; if(gCurrentIdx>0){ gCurrentIdx--; const dt=gTimes[gCurrentIdx]; document.getElementById('timeSelect').value=dt; await loadTileAt(dt);} updateCountAndButtons();
+    if(gTimes.length===0) return; if(gCurrentIdx>0){ gCurrentIdx--; const dt=gTimes[gCurrentIdx]; document.getElementById('timeSelect').value=dt; await loadTileAt(dt);} updateCountAndButtons(); updateSlider();
+  });
+  document.getElementById('timeSlider').addEventListener('input', async (e)=>{
+    const N = gTimes.length; if (N === 0) return;
+    const raw = parseInt(e.target.value, 10);
+    const sliderVal = Math.max(0, Math.min(N-1, isNaN(raw)?0:raw));
+    const idx = (N - 1) - sliderVal; // 反向映射到数组索引（0=最新）
+    if (idx === gCurrentIdx) return;
+    gCurrentIdx = idx;
+    const dt = gTimes[gCurrentIdx];
+    document.getElementById('timeSelect').value = dt;
+    await loadTileAt(dt);
+    updateCountAndButtons();
   });
 </script>
 
diff --git a/templates/radar_nanning.html b/templates/radar_nanning.html
index 7b63923..1b0af73 100644
--- a/templates/radar_nanning.html
+++ b/templates/radar_nanning.html
@@ -41,7 +41,7 @@
         </div>
 
         <div class="card mb-4">
-            <div class="text-lg font-semibold mb-2">最新 7/40/102 瓦片信息</div>
+            <div class="text-lg font-semibold mb-2">7/40/102 瓦片信息</div>
             <div id="tileInfo" class="text-sm space-y-1">
                 <div>时间：<span id="dt" class="font-mono"></span></div>
                 <div>索引：z=<span id="z"></span> / y=<span id="y"></span> / x=<span id="x"></span></div>
@@ -51,7 +51,7 @@
             </div>
         </div>
         <div class="card mb-4">
-            <div class="text-lg font-semibold mb-2">最新雷达站气象（南宁雷达站，第八台气象站）</div>
+            <div class="text-lg font-semibold mb-2">雷达站气象（南宁雷达站，第八台气象站）</div>
             <div id="rtInfo" class="text-sm grid grid-cols-2 gap-y-1 gap-x-6">
                 <div>站点：<span id="rt_alias"></span></div>
                 <div>位置：<span id="rt_lat"></span>，<span id="rt_lon"></span></div>
@@ -87,6 +87,10 @@
                     <button id="btnNext" class="px-2 py-1 border rounded">下一时次</button>
                 </div>
             </div>
+            <!-- 居中滑动条，联动历史时次（0=最新，值越大越旧） -->
+            <div class="w-full flex justify-center mb-2">
+                <input id="timeSlider" type="range" min="0" max="0" value="0" step="1" class="slider slider-horizontal w-64" />
+            </div>
             <div id="radarPlot" class="plot-box"></div>
         </div>
         <div class="card mt-4" style="width: 100%;">
@@ -151,6 +155,7 @@
                     gCurrentIdx = 0;
                 }
                 updateCountAndButtons();
+                updateSlider();
             } catch {}
         }
 
@@ -595,6 +600,7 @@
                 await loadTileAt(v);
             }
             updateCountAndButtons();
+            updateSlider();
         });
         document.getElementById('tsQuery').addEventListener('click', async ()=>{
             const s = fromDTLocalInput(document.getElementById('tsStart').value);
@@ -621,6 +627,7 @@
                 await loadTileAt(dt);
             }
             updateCountAndButtons();
+            updateSlider();
         });
         document.getElementById('btnNext').addEventListener('click', async ()=>{
             if (gTimes.length === 0) return;
@@ -631,6 +638,31 @@
                 await loadTileAt(dt);
             }
             updateCountAndButtons();
+            updateSlider();
+        });
+
+        // 滑动条联动
+        function updateSlider(){
+            const slider = document.getElementById('timeSlider');
+            const N = gTimes.length;
+            slider.max = N > 0 ? String(N-1) : '0';
+            if (N > 0 && gCurrentIdx >= 0) {
+                const sliderVal = (N - 1) - gCurrentIdx; // 值越大越新
+                slider.value = String(sliderVal);
+            }
+            slider.disabled = N === 0;
+        }
+        document.getElementById('timeSlider').addEventListener('input', async (e)=>{
+            const N = gTimes.length; if (N === 0) return;
+            const raw = parseInt(e.target.value, 10);
+            const sliderVal = Math.max(0, Math.min(N-1, isNaN(raw)?0:raw));
+            const idx = (N - 1) - sliderVal; // 反向映射到数组索引（0=最新）
+            if (idx === gCurrentIdx) return;
+            gCurrentIdx = idx;
+            const dt = gTimes[gCurrentIdx];
+            document.getElementById('timeSelect').value = dt;
+            await loadTileAt(dt);
+            updateCountAndButtons();
         });
         // 兜底加载最新
         loadRealtimeLatest().catch(err => {