diff --git a/web/src/components/canvas/canvas-cloud-agent.css b/web/src/components/canvas/canvas-cloud-agent.css
index d6afb4377..c861dc950 100644
--- a/web/src/components/canvas/canvas-cloud-agent.css
+++ b/web/src/components/canvas/canvas-cloud-agent.css
@@ -103,11 +103,7 @@
     border-radius: 8px;
     background: transparent;
     padding: 5px 2px;
-    transition: background-color 160ms ease, transform 160ms ease;
-}
-
-.agent-tool-row:hover {
-    background: color-mix(in srgb, var(--foreground) 3%, transparent);
+    transition: transform 160ms ease;
 }
 
 /* 没有节点明细的“读取信息 / 操作画布”只保留时间线语义，不再撑成一张空卡片。 */
@@ -119,11 +115,6 @@
     padding: 3px 2px;
 }
 
-.agent-tool-row--plain:hover {
-    border-color: transparent;
-    background: transparent;
-}
-
 .agent-tool-row--read {
     --agent-tool-accent: color-mix(in srgb, var(--foreground) 62%, transparent);
 }