调整优化大屏

apps/admin-web/src/admin.css

@@ -308,14 +308,6 @@ body:has(.big-screen-page),
   box-sizing: border-box;
 }
 
-.big-screen-list-head {
-  flex: 0 0 auto;
-  padding: 0 28px 10px 40px;
-  font-size: 15px;
-  color: rgba(170, 200, 230, 0.55);
-  letter-spacing: 2px;
-}
-
 .big-screen-list-body {
   flex: 1 1 0%;
   min-height: 0;
@@ -460,16 +452,20 @@ body:has(.big-screen-page),
 }
 
 .big-screen-empty {
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  height: 100%;
+  position: absolute;
+  left: 0;
+  right: 0;
+  /* 全屏高度黄金分割点（≈0.382），略偏上 */
+  top: 38.2%;
+  transform: translateY(-50%);
+  z-index: 2;
   text-align: center;
   color: rgba(145, 190, 230, 0.42);
-  padding: 48px 40px;
+  padding: 0 40px;
   font-size: 60px;
   letter-spacing: 6px;
   font-weight: 400;
+  pointer-events: none;
 }
 
 .big-screen-fx {
@@ -722,7 +718,6 @@ body:has(.big-screen-page),
   .big-screen-clock {
     font-size: 56px;
   }
-  .big-screen-list-head,
   .big-screen-row {
     grid-template-columns: minmax(140px, 20%) minmax(0, 1fr) minmax(110px, 16%) minmax(130px, 18%);
     font-size: 16px;

apps/admin-web/src/pages/BigScreenPage.tsx

@@ -412,16 +412,8 @@ export default function BigScreenPage() {
       <LiveClock />
 
       <div className="big-screen-list">
-        <div className="big-screen-list-head">
-          <span>订单金额</span>
-          <span>订单商品</span>
-          <span>下单时间</span>
-          <span>下单账号</span>
-        </div>
         <div className="big-screen-list-body" ref={viewportRef}>
-          {items.length === 0 ? (
-            <div className="big-screen-empty">{loadError || '当日暂无订单'}</div>
-          ) : (
+          {items.length === 0 ? null : (
             <div
               className={`big-screen-track${rolling ? ' is-rolling' : ''}${paused ? ' is-paused' : ''}`}
               style={rolling ? ({ ['--marquee-ms']: `${marqueeMs}ms` } as CSSProperties) : undefined}
@@ -438,6 +430,10 @@ export default function BigScreenPage() {
         </div>
       </div>
 
+      {items.length === 0 ? (
+        <div className="big-screen-empty">{loadError || '当日暂无订单'}</div>
+      ) : null}
+
       {celebrate ? (
         <CelebrateFx
           key={celebrate.id}