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frontend-react/src/components/PresetPanel/PresetPanel.css

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+/* ==================== 顶部工具栏区域 ==================== */
+
+.toolbar {
+  position: absolute;
+  top: 0;
+  left: 0;
+  right: 0;
+  height: 50px;
+  background-color: #fff;
+  border-bottom: 1px solid #ddd;
+  padding: 0;
+  display: flex;
+  align-items: center;
+  justify-content: flex-end;
+  z-index: 100;
+  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
+  transition: height 0.3s ease;
+}
+
+.toolbar.expanded {
+  height: auto;
+  max-height: 300px;
+  overflow-y: auto;
+  padding-bottom: 10px;
+}
+
+.toolbar-content {
+  display: none;
+  width: 100%;
+  padding: 10px 20px;
+}
+
+.toolbar.expanded .toolbar-content {
+  display: block;
+}
+
+.toolbar-toggle-btn {
+  position: absolute;
+  right: 0;
+  top: 0;
+  height: 50px;
+  width: 50px;
+  background: none;
+  border: none;
+  border-left: 1px solid #ddd;
+  cursor: pointer;
+  font-size: 0.8rem;
+  color: #666;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  z-index: 101;
+}
+
+.toolbar-toggle-btn:hover {
+  background-color: #f5f5f5;
+}

frontend-react/src/components/PresetPanel/PresetPanel.jsx

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+import React from 'react';
+import './PresetPanel.css';
+
+const PresetPanel = () => {
+  return (
+    <div className="preset-panel">
+      {/* 顶部：预设选择与输入 */}
+      <div className="preset-header">
+        {/* 下拉框 */}
+        <select className="preset-select">
+          <option>选择预设...</option>
+        </select>
+        {/* 输入框组（待定） */}
+        <div className="preset-inputs">
+          {/* inputs here */}
+        </div>
+      </div>
+
+      {/* 下方：大槽位区域 */}
+      <div className="preset-slots">
+        {/* 槽位列表 */}
+        <div className="slot-item">槽位 1</div>
+        <div className="slot-item">槽位 2</div>
+        {/* ... */}
+      </div>
+    </div>
+  );
+};
+
+export default PresetPanel;