diff --git a/templates/radar_haizhu.html b/templates/radar_haizhu.html
index c8ed920..b583a3a 100644
--- a/templates/radar_haizhu.html
+++ b/templates/radar_haizhu.html
@@ -359,9 +359,10 @@
   });
   document.getElementById('timeSelect').addEventListener('change', async (e)=>{ 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(); updateSlider(); });
   function updateCountAndButtons(){
-    const N=gTimes.length; const el=document.getElementById('countInfo'); if(N===0||gCurrentIdx<0){ el.textContent='共0条数据，第0条'; return; }
-    el.textContent=`共${N}条数据，-${k-1}时次`;
-    const prev=document.getElementById('btnPrev'), next=document.getElementById('btnNext');
+    const N = gTimes.length;
+    const k = gCurrentIdx >= 0 ? (gCurrentIdx + 1) : 0;
+    document.getElementById('countInfo').textContent = `共${N}条数据，-${k-1}时次`;
+    const prev=document.getElementById('btnPrev'); const next=document.getElementById('btnNext');
     prev.disabled = !(N>0 && gCurrentIdx>=0 && gCurrentIdx<N-1);
     next.disabled = !(N>0 && gCurrentIdx>0);
   }
diff --git a/templates/radar_panyu.html b/templates/radar_panyu.html
index 6e4eff3..7e6cf8e 100644
--- a/templates/radar_panyu.html
+++ b/templates/radar_panyu.html
@@ -84,7 +84,7 @@
         <button id="btnNext" class="px-2 py-1 border rounded">下一时次</button>
       </div>
     </div>
-    <div class="w-full flex justify中心 mb-2">
+    <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>