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code/app/base-app/test.html

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+<!DOCTYPE html>
+<html lang="en">
+<head>
+<meta charset="UTF-8">
+<meta name="viewport" content="width=device-width, initial-scale=1.0">
+<title>Curved TabBar</title>
+<style>
+  body {
+    margin: 0;
+    padding: 0;
+    background: #f5f5f5;
+  }
+
+  /* TabBar 容器 */
+  .tabbar-container {
+    position: fixed;
+    bottom: 0;
+    width: 100%;
+    height: 80px;
+    display: flex;
+    justify-content: center;
+    align-items: flex-end;
+    z-index: 10;
+  }
+
+  /* TabBar 背景弧形 */
+  .tabbar-bg {
+    position: absolute;
+    bottom: 0;
+    width: 100%;
+    height: 60px;
+    background: white;
+    border-top-left-radius: 30px;
+    border-top-right-radius: 30px;
+    box-shadow: 0 -2px 6px rgba(0,0,0,0.1);
+  }
+
+  /* Tab 按钮 */
+  .tab-item {
+    flex: 1;
+    text-align: center;
+    line-height: 60px;
+    font-size: 24px;
+    color: #9ca3af;
+    transition: transform 0.2s;
+    position: relative;
+    z-index: 20;
+  }
+
+  .tab-item.active {
+    color: #333333;
+  }
+
+  .tab-item:hover {
+    transform: scale(1.2);
+  }
+
+  /* 中间凸起按钮 */
+  .tab-item.center {
+    width: 70px;
+    height: 70px;
+    background: #4f46e5;
+    border-radius: 50%;
+    color: white;
+    line-height: 70px;
+    margin-top: -20px; /* 嵌入凹槽 */
+    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
+    font-size: 28px;
+  }
+</style>
+</head>
+<body>
+
+<div class="tabbar-container">
+  <div class="tabbar-bg"></div>
+  <div class="tab-item">💰</div>
+  <div class="tab-item">❤️</div>
+  <div class="tab-item center">🗂</div>
+  <div class="tab-item">💬</div>
+  <div class="tab-item">👤</div>
+</div>
+
+</body>
+</html>