diff --git a/easyflow-ui-admin/packages/tinyflow-ui/src/components/base/floating-trigger.svelte b/easyflow-ui-admin/packages/tinyflow-ui/src/components/base/floating-trigger.svelte
index 696d0fd..cefb594 100644
--- a/easyflow-ui-admin/packages/tinyflow-ui/src/components/base/floating-trigger.svelte
+++ b/easyflow-ui-admin/packages/tinyflow-ui/src/components/base/floating-trigger.svelte
@@ -3,13 +3,14 @@
   import {createFloating} from '../utils/createFloating';
   import type {Placement} from '@floating-ui/dom';
 
-  const { children, floating, placement = 'bottom', onShow, onHide }:
+  const { children, floating, placement = 'bottom', onShow, onHide, syncWidth = false }:
         {
             children: Snippet,
             floating: Snippet,
             placement?: Placement,
             onShow?: () => void,
-            onHide?: () => void
+            onHide?: () => void,
+            syncWidth?: boolean
         } = $props();
 
     let triggerEl!: HTMLDivElement, contentEl!: HTMLDivElement;
@@ -22,7 +23,8 @@
             interactive: true,
             placement,
             onShow,
-            onHide
+            onHide,
+            syncWidth
         });
 
         return () => {
diff --git a/easyflow-ui-admin/packages/tinyflow-ui/src/components/base/select.svelte b/easyflow-ui-admin/packages/tinyflow-ui/src/components/base/select.svelte
index 5dab929..2b9c0b2 100644
--- a/easyflow-ui-admin/packages/tinyflow-ui/src/components/base/select.svelte
+++ b/easyflow-ui-admin/packages/tinyflow-ui/src/components/base/select.svelte
@@ -179,7 +179,7 @@
 {/snippet}
 
 <div {...rest} class="tf-select {rest['class']}">
-    <FloatingTrigger bind:this={triggerObject} onShow={() => isOpen = true} onHide={() => { isOpen = false; hoveredItem = null; }}>
+    <FloatingTrigger bind:this={triggerObject} onShow={() => isOpen = true} onHide={() => { isOpen = false; hoveredItem = null; }} syncWidth={true}>
         <button class="tf-select-input nopan nodrag {isOpen ? 'active' : ''}" {...rest}>
             <div class="tf-select-input-value">
                 {#each activeItemsState as item, index (`${index}_${item.value}`)}
@@ -303,11 +303,10 @@
       flex-direction: column;
       background: #fff;
       margin-top: 5px;
-      border: 1px solid #ccc;
-      border-radius: 5px;
-      padding: 5px;
-      width: max-content;
-      min-width: 100%;
+      border: 1px solid #e5e7eb;
+      border-radius: 6px;
+      padding: 4px;
+      width: 100%;
       z-index: 99999;
       box-sizing: border-box;
       max-height: 220px;
@@ -318,20 +317,20 @@
   .tf-select-default-item {
       display: flex;
       align-items: center;
-      padding: 5px 10px;
+      padding: 6px 12px;
       border: none;
       background: #fff;
-      border-radius: 5px;
+      border-radius: 4px;
       cursor: pointer;
-      line-height: 100%;
+      line-height: 1.5;
       gap: 2px;
       width: 100%;
       text-align: left;
       font-size: 13px;
-      color: #333;
+      color: #111827;
 
       &:hover {
-          background: #f0f0f0;
+          background: #f5f5f7;
       }
   }
 
@@ -347,11 +346,11 @@
       background: #fff;
       margin-top: 5px;
       border: 1px solid #e5e7eb;
-      border-radius: 10px; /* slightly smaller radius */
-      width: 280px; /* Reduced width to be more compact */
+      border-radius: 10px; 
+      /* Removed fixed width to allow syncWidth to control it */
       z-index: 99999;
       box-sizing: border-box;
-      max-height: 400px; /* slightly less tall */
+      max-height: 400px; 
       overflow: hidden;
       box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
   }
@@ -360,13 +359,13 @@
       display: flex;
       justify-content: space-between;
       align-items: center;
-      padding: 10px 12px; /* tighter padding */
+      padding: 10px 12px; 
       border-bottom: 1px solid #f3f4f6;
       background: #fff;
   }
 
   .tf-select-model-header-title {
-      font-size: 13px; /* smaller title */
+      font-size: 13px; 
       font-weight: 600;
       color: #111827;
   }
@@ -381,13 +380,13 @@
   .tf-select-model-list {
       display: flex;
       flex-direction: column;
-      padding: 8px; /* tighter padding */
+      padding: 8px; 
       overflow-y: auto;
-      gap: 4px; /* tighter gap between items */
+      gap: 4px; 
   }
 
   .tf-select-model-group-title {
-      font-size: 12px; /* smaller group title */
+      font-size: 12px; 
       font-weight: 500;
       color: #6b7280;
       margin-top: 6px;
@@ -399,7 +398,7 @@
   }
 
   .tf-select-model-group-icon {
-      width: 14px; /* smaller icon */
+      width: 14px; 
       height: 14px;
       display: flex;
       align-items: center;
@@ -420,7 +419,7 @@
   .tf-select-model-item {
       display: flex;
       align-items: flex-start;
-      padding: 6px 8px; /* tighter item padding */
+      padding: 6px 8px; 
       border: none;
       background: transparent;
       border-radius: 6px;
@@ -440,7 +439,7 @@
 
   .tf-select-model-icon {
       flex-shrink: 0;
-      width: 32px; /* smaller item icon */
+      width: 32px; 
       height: 32px;
       border-radius: 6px;
       overflow: hidden;
@@ -452,7 +451,7 @@
   }
 
   .tf-select-model-icon :global(svg), .tf-select-model-icon img {
-      width: 70%; /* icon inside box */
+      width: 70%; 
       height: 70%;
       object-fit: contain;
   }
@@ -466,13 +465,13 @@
   .tf-select-model-info {
       display: flex;
       flex-direction: column;
-      gap: 2px; /* tighter info gap */
+      gap: 2px; 
       flex-grow: 1;
       overflow: hidden;
   }
 
   .tf-select-model-title {
-      font-size: 13px; /* smaller font */
+      font-size: 13px; 
       font-weight: 500;
       color: #111827;
       white-space: nowrap;
@@ -489,19 +488,19 @@
   .tf-select-model-tag {
       background: #f3f4f6;
       color: #6b7280;
-      font-size: 10px; /* smaller tag */
+      font-size: 10px; 
       padding: 1px 6px;
       border-radius: 4px;
   }
 
   .tf-select-model-desc {
-      font-size: 11px; /* smaller desc */
+      font-size: 11px; 
       color: #6b7280;
       line-height: 1.3;
       margin-top: 2px;
       display: -webkit-box;
-      -webkit-line-clamp: 2; /* limit lines */
-      -webkit-box-orient: vertical;
+      -webkit-line-clamp: 2; 
+      -webkit-box-orient: vertical;  
       overflow: hidden;
   }
 
@@ -513,11 +512,10 @@
     box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
     border: 1px solid #e5e7eb;
     overflow: hidden;
-    min-width: 220px;
+    /* width expands naturally since createFloating sets minWidth, not width */
     width: max-content;
-    max-width: 600px;
+    box-sizing: border-box;
     max-height: 480px;
-    transition: width 0.2s ease;
     z-index: 99999;
   }
 
@@ -528,22 +526,27 @@
     overflow-y: auto;
 
     &.tf-select-primary-list {
-       width: 220px;
+       width: 100%; /* Default fills the wrapper, which is minWidth-constrained by the input */
        flex-shrink: 0;
        background: #f9fafb;
     }
 
+    /* When a secondary list is open, we fix the primary list to 100% of the input's width (done via absolute positioning or just keeping it wide enough) */
+    .tf-select-wrapper:has(.tf-select-secondary-list) &.tf-select-primary-list {
+        /* Let it take the width of the input minus borders/paddings if needed, but minWidth handles it mostly */
+        width: auto; 
+        min-width: 180px;
+    }
+
     &.tf-select-secondary-list {
-       flex-grow: 1;
-       min-width: 200px;
+       min-width: 220px;
        background: #fff;
        padding: 12px;
        border-left: 1px solid #f3f4f6;
        animation: slideIn 0.2s ease-out;
+       box-sizing: border-box;
     }
-  }
-
-  @keyframes slideIn {
+  }  @keyframes slideIn {
     from { opacity: 0; transform: translateX(-10px); }
     to { opacity: 1; transform: translateX(0); }
   }
diff --git a/easyflow-ui-admin/packages/tinyflow-ui/src/components/utils/createFloating.ts b/easyflow-ui-admin/packages/tinyflow-ui/src/components/utils/createFloating.ts
index 6732d11..366c20d 100644
--- a/easyflow-ui-admin/packages/tinyflow-ui/src/components/utils/createFloating.ts
+++ b/easyflow-ui-admin/packages/tinyflow-ui/src/components/utils/createFloating.ts
@@ -6,7 +6,8 @@ import {
   type OffsetOptions,
   type Placement,
   shift,
-  type ShiftOptions
+  type ShiftOptions,
+  size
 } from '@floating-ui/dom';
 
 export type FloatingOptions = {
@@ -21,6 +22,7 @@ export type FloatingOptions = {
     showArrow?: boolean;
     onShow?: () => void;
     onHide?: () => void;
+    syncWidth?: boolean;
 };
 
 export type FloatingInstance = {
@@ -40,7 +42,8 @@ export const createFloating = ({
     interactive,
     showArrow,
     onShow,
-    onHide
+    onHide,
+    syncWidth = false
 }: FloatingOptions): FloatingInstance => {
     if (typeof trigger === 'string') {
         const triggerEl = document.querySelector(trigger);
@@ -83,7 +86,14 @@ export const createFloating = ({
                 offset(offsetOptions), // 手动偏移配置
                 // flip(flipOptions), // 注释掉自动翻转，强制向下弹出，避免遮挡顶部工具栏
                 shift(shiftOptions), //自动偏移（使得浮动元素能够进入视野）
-                ...(showArrow ? [arrow({ element: arrowElement })] : [])
+                ...(showArrow ? [arrow({ element: arrowElement })] : []),
+                ...(syncWidth ? [size({
+                    apply({ rects, elements }) {
+                        Object.assign(elements.floating.style, {
+                            minWidth: `${rects.reference.width}px`,
+                        });
+                    }
+                })] : [])
             ]
         }).then(({ x, y, placement, middlewareData }) => {
             Object.assign(floating.style, {