fix: 工作流程图强制一行显示

landing/index.html

@@ -352,15 +352,14 @@
     .flow-steps {
       display: flex;
       align-items: flex-start;
-      gap: 12px;
-      flex-wrap: wrap;
+      gap: 8px;
+      flex-wrap: nowrap;
       justify-content: center;
     }
 
     .flow-step {
       flex: 1;
-      min-width: 140px;
-      max-width: 180px;
+      min-width: 0;
       text-align: center;
     }
 
@@ -401,13 +400,15 @@
       align-items: center;
       padding-top: 18px;
       color: var(--text-muted);
+      flex-shrink: 0;
     }
 
     .flow-arrow svg {
-      width: 20px; height: 20px;
+      width: 18px; height: 18px;
     }
 
     @media (max-width: 768px) {
+      .flow-steps { flex-wrap: wrap; }
       .flow-arrow { display: none; }
       .flow-section { padding: 32px 20px; }
     }