perf: 完善黑夜模式的表现效果，工作流编排幕布和节点在黑夜模式正常表现

easyflow-ui-admin/packages/tinyflow-ui/src/components/nodes/LLMNode.svelte

@@ -285,7 +285,7 @@
 
     .setting-title {
         font-size: 12px;
-        color: #999;
+        color: var(--tf-text-muted);
         margin-bottom: 4px;
         margin-top: 10px;
     }
@@ -308,7 +308,7 @@
 
     .slider-container span {
         font-size: 12px;
-        color: #666;
+        color: var(--tf-text-secondary);
         display: flex;
         justify-content: space-between;
         align-items: center;
@@ -316,18 +316,18 @@
 
     .llm-setting {
         width: 200px;
-        background: #fff;
+        background: var(--tf-bg-surface);
         padding: 10px;
         border-radius: 5px;
-        box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
-        border: 1px solid #ddd;
+        box-shadow: var(--tf-shadow-medium);
+        border: 1px solid var(--tf-border-color-strong);
 
     }
 
     input[type="range"] {
         width: 100%;
         height: 4px;
-        background: #ddd;
+        background: var(--tf-slider-track-bg);
         border-radius: 2px;
         outline: none;
         -webkit-appearance: none;
@@ -337,9 +337,8 @@
         -webkit-appearance: none;
         width: 14px;
         height: 14px;
-        background: #007bff;
+        background: var(--tf-slider-thumb-bg);
         border-radius: 50%;
         cursor: pointer;
     }
 </style>
-