diff --git a/mobile-uni/src/components/chat/ChatComposer.vue b/mobile-uni/src/components/chat/ChatComposer.vue
index 538f0a81..bbda5890 100644
--- a/mobile-uni/src/components/chat/ChatComposer.vue
+++ b/mobile-uni/src/components/chat/ChatComposer.vue
@@ -223,7 +223,7 @@ defineExpose({ teardown });
 .chat-composer-wrap {
   border-top: 1px solid #ebedf0;
   background: #f7f8fa;
-  padding: 8px 10px calc(10px + env(safe-area-inset-bottom));
+  padding: 8px 10px 10px;
 }
 
 .chip-scroll {
diff --git a/mobile-uni/src/pages/user/sop/index.vue b/mobile-uni/src/pages/user/sop/index.vue
index a5e7ba87..7fd0ab39 100644
--- a/mobile-uni/src/pages/user/sop/index.vue
+++ b/mobile-uni/src/pages/user/sop/index.vue
@@ -1826,9 +1826,16 @@ onUnload(() => {
 
 /* ===== chat layout (WeChat-style rebuild) ===== */
 .sop-chat-page {
+  position: fixed;
+  top: var(--window-top, 0px);
+  right: 0;
+  bottom: var(--window-bottom, 0px);
+  left: 0;
   display: flex;
   flex-direction: column;
-  height: calc(100vh - var(--window-top, 0px) - var(--window-bottom, 0px));
+  min-height: 0;
+  height: auto;
+  padding: 0;
   background: #f2f3f5;
   overflow: hidden;
 }