diff --git a/assets/css/admin/tickets.css b/assets/css/admin/tickets.css
index 68b1f85f..0cecbbf8 100644
--- a/assets/css/admin/tickets.css
+++ b/assets/css/admin/tickets.css
@@ -55,7 +55,11 @@
 .aksrt-ticket-detail { --aksrt-ticket-pane-height: max(460px, calc(100vh - 200px)); display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 16px; align-items: start; }
 .aksrt-ticket-detail__main,
 .aksrt-ticket-detail__side { display: flex; flex-direction: column; gap: 16px; min-width: 0; }
-.aksrt-ticket-detail__side { max-height: var(--aksrt-ticket-pane-height); overflow-y: auto; overscroll-behavior: contain; scrollbar-width: thin; }
+/* 侧栏固定为面板高度且自身不滚动：工单信息按内容高度完整显示，内部备注占满剩余高度，只有备注列表在卡片内滚动。
+   仅当视口极矮、两张卡片的最小高度之和仍放不下时，才退回到侧栏整体滚动，避免内容被裁掉。 */
+.aksrt-ticket-detail__side { height: var(--aksrt-ticket-pane-height); overflow-y: auto; overscroll-behavior: contain; scrollbar-width: thin; }
+.aksrt-ticket-detail__side > .aksrt-ticket-detail__card { flex: none; }
+.aksrt-ticket-detail__side > .aksrt-ticket-detail__private { display: flex; flex: 1 1 auto; flex-direction: column; min-height: 160px; }
 .aksrt-ticket-conversation,
 .aksrt-ticket-detail__card { background: var(--an-card); border: 1px solid var(--an-border); border-radius: var(--an-radius); }
 /* 会话面板（IM 式）：头部、时间线、回复框同属一张卡片；卡片高度跟随视口，开屏即可看到回复框与发送按钮，只有时间线滚动。 */
@@ -129,7 +133,9 @@
 .aksrt-ticket-detail__private { background: #fffbf0; border-color: #f3e2b6; }
 .aksrt-ticket-detail__private .aksrt-ticket-section-head { margin-bottom: 4px; }
 .aksrt-ticket-detail__private > .aksrt-ticket-hint { margin: 0 0 12px; color: #a26b07; }
-.aksrt-ticket-detail__notes { max-height: 240px; margin: 0 0 12px; overflow-y: auto; overscroll-behavior: contain; }
+.aksrt-ticket-detail__private > .aksrt-ticket-section-head,
+.aksrt-ticket-detail__private > .aksrt-ticket-hint { flex: none; }
+.aksrt-ticket-detail__notes { flex: 1 1 auto; min-height: 0; margin: 0; overflow-y: auto; overscroll-behavior: contain; scrollbar-width: thin; }
 .aksrt-ticket-detail__notes ol { display: flex; flex-direction: column; gap: 8px; margin: 0; padding: 0; list-style: none; }
 .aksrt-ticket-detail__notes-older { margin-bottom: 8px; }
 .aksrt-ticket-detail__notes-older > summary { display: flex; align-items: center; gap: 6px; padding: 2px 0; color: #a26b07; font-size: 12px; cursor: pointer; list-style: none; }
@@ -150,7 +156,10 @@
 
 @media (max-width: 960px) {
 	.aksrt-ticket-detail { grid-template-columns: minmax(0, 1fr); }
-	.aksrt-ticket-detail__side { position: static; max-height: none; overflow: visible; }
+	/* 单列时侧栏按内容高度排在会话下方，备注列表恢复独立的高度上限。 */
+	.aksrt-ticket-detail__side { height: auto; overflow: visible; }
+	.aksrt-ticket-detail__side > .aksrt-ticket-detail__private { flex: none; min-height: 0; }
+	.aksrt-ticket-detail__notes { max-height: 320px; }
 }
 @media (max-width: 600px) {
 	.aksrt-ticket-detail { --aksrt-ticket-pane-height: max(400px, calc(100vh - 160px)); }