diff --git a/app/src/main/java/com/shuwei/dish/match/ui/SlaveActivity.kt b/app/src/main/java/com/shuwei/dish/match/ui/SlaveActivity.kt
index a7a4018..0013c09 100644
--- a/app/src/main/java/com/shuwei/dish/match/ui/SlaveActivity.kt
+++ b/app/src/main/java/com/shuwei/dish/match/ui/SlaveActivity.kt
@@ -150,7 +150,9 @@ class SlaveActivity : BaseActivity() {
             // 重量快照与高亮判断（在回调线程计算，不涉及 UI）
             val baseline = weightSnapshot[address]
             val shouldHighlight = baseline != null
+                    && baseline >= 0.0
                     && state == WeightUtil.STATE_STABLE
+                    && weight > WEIGHT_DELTA_THRESHOLD
                     && (weight - baseline) > WEIGHT_DELTA_THRESHOLD
             if (baseline == null || state == WeightUtil.STATE_STABLE) {
                 weightSnapshot[address] = weight