恢复币本位「重试卖回」常显，带鱼屏内容区改回 1800 居中留白。

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/common/static/instance_page.css

@@ -4,13 +4,12 @@
 .order-entry-model-row select.order-entry-model-sub{min-width:7em;max-width:10rem}
 .order-leverage-hint{font-size:.78rem;color:#cfd3ef;white-space:nowrap;align-self:center}
         body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:#0b0d14;color:#eaeaea;padding:14px 12px}
-        /* 1920 左右用满:约 96vw / 1840,两侧留白更小 */
-        .container{width:100%;max-width:min(1840px,96vw);margin:0 auto;padding:0 clamp(6px,1vw,14px)}
-        /* 中控工作台内嵌:铺满 iframe,不受带鱼屏 1920 居中限制 */
+        /* 内容区锁定 1800,超宽两侧留白 */
+        .container{width:100%;max-width:min(1800px,96vw);margin:0 auto;padding:0 clamp(6px,1vw,14px)}
         body[data-embed-shell="1"] .container{
-            max-width:none;
+            max-width:min(1800px,96vw);
             width:100%;
-            margin:0;
+            margin:0 auto;
             padding:0 clamp(6px,1vw,14px);
         }
         .header{display:flex;flex-direction:column;align-items:center;gap:8px;margin-bottom:12px}
@@ -175,18 +174,15 @@
             .panel-scroll,.pos-list{max-height:420px}
             .records-card .table-wrap{max-height:620px;overflow:auto}
         }
-        /* 带鱼屏(宽高比≥21:9):独立打开时固定 1920 居中;中控内嵌仍全宽 */
+        /* 带鱼屏(宽高比≥21:9):锁定 1800 居中,两侧留白 */
         @media (min-aspect-ratio: 21/9) {
-            .container{
+            .container,
+            body[data-embed-shell="1"] .container{
                 width:100%;
-                max-width:min(1920px, calc(100vw - 24px));
+                max-width:min(1800px, calc(100vw - 24px));
                 margin-left:auto;
                 margin-right:auto;
             }
-            body[data-embed-shell="1"] .container{
-                max-width:none;
-                margin:0;
-            }
         }
         @media (min-width: 2560px){
             .dual-panel-grid{gap:18px}