      .transition-all-300 {
        @apply transition-all duration-300 ease-in-out;
      }
    }
  </style>
</head>
<body class="bg-gray-50 font-sans text-dark">
  <div id="app" class="hidden min-h-screen flex items-center justify-center p-4 sm:p-6 lg:p-8">
    <div class="w-full max-w-4xl">
      <!-- 品牌头部 -->
      <div class="text-center mb-8">
        <h1 class="text-[clamp(1.5rem,3vw,2rem)] font-bold text-dark">私域引流宝快速安装</h1>
      </div>
      
      <!-- 主内容卡片 -->