diff --git a/index.html b/index.html
index bb07b15..f3d9530 100644
--- a/index.html
+++ b/index.html
@@ -249,6 +249,7 @@ function renderPerformance(){
   else{
     if(sands.fetched_at)notes.push(`Sands Cost 抓取于 ${esc(String(sands.fetched_at).replace('T',' '))}，不随每日自动更新`);
     if(sands.scope)notes.push(`Cost 范围：${esc(sands.scope)}`);
+    if(sands.carried_over)notes.push('<b style="color:#b45309">Cost 沿用上次抓取值，需本地重新抓取才会更新</b>');
     if(Array.isArray(sands.missing_pkgs)&&sands.missing_pkgs.length)
       notes.push(`<b style="color:#b42318">Cost 不完整，缺少包：${esc(sands.missing_pkgs.join(', '))}</b>`);
   }
diff --git a/schedule.conf b/schedule.conf
deleted file mode 100644
index 1d5e644..0000000
--- a/schedule.conf
+++ /dev/null
@@ -1 +0,0 @@
-24
diff --git a/update.sh b/update.sh
deleted file mode 100644
index a31a630..0000000
--- a/update.sh
+++ /dev/null
@@ -1,13 +0,0 @@
-#!/bin/sh
-set -eu
-
-# 平台按 schedule.conf 每 24 小时执行一次。
-SCRIPT_DIR=$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)
-TMP_FILE="$SCRIPT_DIR/data.json.tmp"
-OUTPUT_FILE="$SCRIPT_DIR/data.json"
-
-rm -f "$TMP_FILE"
-python3 "$SCRIPT_DIR/update_report_data.py" "$TMP_FILE"
-
-mv "$TMP_FILE" "$OUTPUT_FILE"
-echo "Updated $OUTPUT_FILE"
diff --git a/update_report_data.py b/update_report_data.py
index e247384..e0cccfc 100644
--- a/update_report_data.py
+++ b/update_report_data.py
@@ -364,6 +364,18 @@ def load_sands_cost():
     ]
     path = next((item for item in candidates if item.exists()), None)
     if path is None:
+        # 服务器上没有 sands_cost.json（Sands 需登录），沿用上一版 data.json 里的值
+        previous = here.parent / "data.json"
+        if previous.exists():
+            try:
+                sands = (json.loads(previous.read_text(encoding="utf-8")).get("performance") or {}).get("sands")
+            except Exception:
+                sands = None
+            if sands and sands.get("cost"):
+                sands = dict(sands)
+                sands["carried_over"] = True
+                print(f"  Sands Cost：沿用上一版 {sands['cost']}（抓取于 {sands.get('fetched_at') or '未知'}）")
+                return sands
         print("  Sands Cost：未找到 sands_cost.json，将留空")
         return None
     data = json.loads(path.read_text(encoding="utf-8"))