/* 1. 基础样式与移动端背景 */
        body {
            font-family: 'Arial', sans-serif;
            margin: 0;
            display: flex;
            justify-content: center;
            min-height: 100vh;
            background: linear-gradient(180deg, #f0f0f0 0%, #e0e0e0 100%); /* 浅灰色渐变背景 */
        }

        /* 2. 主 App 容器 (限制宽度以模拟手机屏幕) */
        .caveem-app {
            width: 100%;
            max-width: 600px; /* 模拟手机最大宽度 */

            /* display: flex; 
            flex-direction: column; */
            background-color: transparent; /* 让背景渐变透出 */
            position: relative;
            overflow: hidden; /* 确保内容不溢出 */
        }

        /* 3. 桌面和平板端适配：内容居中 */
        @media (min-width: 401px) {
            .caveem-app {
                /* box-shadow: 0 0 30px rgba(0, 0, 0, 0.1); /* 增加阴影，使其像一个居中的设备屏幕 */
                height: 800px; /* 模拟设备高度 */
                margin: 50px auto; /* 垂直和水平居中 */
                border-radius: 20px;
                /* background: linear-gradient(180deg, #f0f0f0 0%, #e0e0e0 100%); /* 再次应用渐变确保内部填充 */
            }
            body {
                background-color: #d8d8d8; /* 桌面端背景填充色 */
                background-image: none;
            }
        }

        /* 4. 标题栏 Header */
        .app-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px;
            z-index: 10;
        }

        .brand-name {
            font-size: 24px;
            font-weight: bold;
            color: #333;
        }

        .header-buttons button {
            background: none;
            border: none;
            cursor: pointer;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            margin-left: 10px;
            display: inline-flex;
            justify-content: center;
            align-items: center;
            color: #333;
            font-size: 14px;
            border: 1px solid rgba(0, 0, 0, 0.1);
            transition: background-color 0.2s;
        }

        /* 5. 主内容区 Main Content */
        .app-content {
            padding: 0 20px;
            flex-grow: 1;
        }

        .main-title {
            font-size: 48px;
            font-weight: 800;
            line-height: 1;
            margin: 40px 0 60px;
            color: #E94D87; /* 粉色/洋红色强调 */
            background-image: linear-gradient(271deg,rgba(149, 0, 54, 1) 0,rgba(251, 0, 90, 1) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color:transparent;
        }

        /* 6. 说明书链接按钮 */
        .manual-link {
            text-decoration: none;
            display: flex;
            align-items: center;
            background-color: white;
            padding: 15px;
            margin-bottom: 15px;
            border-radius: 100px;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
            cursor: pointer;
            transition: box-shadow 0.2s;
        }

        .manual-link:hover {
            box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
        }

        .manual-link img {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            object-fit: cover;
            margin-right: 15px;
            border: 1px solid #f0f0f0;
        }

        .manual-link .icon-placeholder {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            margin-right: 15px;
            background-color: #f2f2f2;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: #E94D87;
        }

        .manual-link span {
            flex-grow: 1;
            font-weight: 600;
            color: #333;
        }

        .arrow {
            color: #999;
            font-size: 20px;
            widht:40px;
        }

        /* 7. 底部 Footer */
        .app-footer {
            padding: 30px 20px 40px;
            text-align: center;
        }

        .social-icons a {
            color: #333;
            font-size: 24px;
            margin: 0 15px;
            text-decoration: none;
        }

        /* 8. 模态框/弹窗基础样式 */
        .modal-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.5);
            display: none; /* 默认隐藏 */
            justify-content: center;
            align-items: flex-end; /* 模拟从底部弹出 */
            z-index: 20;
        }

        .modal-overlay.active {
            display: flex;
        }

        .modal-content {
            width: 100%;
            max-width: 600px;
            background-color: white;
            border-top-left-radius: 20px;
            border-top-right-radius: 20px;
            padding: 30px 20px;
            box-sizing: border-box;
            transform: translateY(100%);
            animation: slide-up 0.3s forwards;
            position: relative;
        }

        @keyframes slide-up {
            to { transform: translateY(0); }
        }

        .modal-close {
            position: absolute;
            top: 20px;
            right: 20px;
            font-size: 24px;
            cursor: pointer;
            color: #333;
        }

        /* 9. 语言选择弹窗 (屏幕 2) */
        .language-btn {
            width: 100%;
            padding: 15px;
            margin-bottom: 15px;
            border: none;
            border-radius: 10px;
            background-color: #f5f5f5;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: background-color 0.2s;
        }

        .language-btn.active {
            background-color: #E94D87;
            color: white;
        }

        /* 10. 服务支持弹窗 (屏幕 3) */
        .support-title {
            font-size: 24px;
            font-weight: 800;
            color: #E94D87;
            background-image: linear-gradient(271deg,rgba(149, 0, 54, 1) 0,rgba(251, 0, 90, 1) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color:transparent;
            margin-bottom: 20px;
        }

        .support-text {
            font-size: 15px;
            color: #555;
            line-height: 1.5;
            margin-bottom: 30px;
        }

        .support-text a {
            color: #E94D87;
            text-decoration: underline;
        }

        .send-btn {
            width: 100%;
            padding: 15px;
            border: none;
            border-radius: 8px;
            background-color: #212121; /* 深色按钮 */
            color: white;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
        }
        .image_1 {
            width:150px;
        }
        .image_2 {
            width:30px;
        }
        .header-buttons {
            display: flex;
        }
        .ctl {
	        text-align:center;
            width:300px;
            font-size:20px;
        }
        .arrow{
            text-align: right;
        }