function guanggao(url) {
    document.write(`
        <meta name="viewport" content="width=device-width,initial-scale=1, maximum-scale=1, user-scalable=no">
        <style>
            html, body {
                width: 100%;
                margin: 0;
                padding: 0;
                overflow-x: hidden;
            }
            body.ad-active {
                position: fixed;
                width: 100%;
                height: 100%;
            }
        </style>
    `);

    var adContainer = document.createElement("div");
    adContainer.style.cssText = `
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        height: 30%;
        z-index: 99999;
        background: #fff;
        border-top: 1px solid #ddd;
        box-sizing: border-box;
    `;

    var iframe = document.createElement("iframe");
    iframe.src = url;
    iframe.style.cssText = `
        width: 100%;
        height: 100%;
        border: none;
    `;
    iframe.scrolling = "auto";

    var closeBtn = document.createElement("div");
    closeBtn.innerHTML = "×";
    closeBtn.style.cssText = `
        position: absolute;
        top: 5px;
        right: 10px;
        font-size: 20px;
        cursor: pointer;
        z-index: 100000;
    `;
    closeBtn.onclick = function() {
        document.body.classList.remove("ad-active");
        adContainer.remove();
    };

    adContainer.appendChild(iframe);
    adContainer.appendChild(closeBtn);
    document.body.appendChild(adContainer);
    document.body.classList.add("ad-active");
}

// ✅ 新增蜘蛛判断函数
function isSpider() {
    var ua = navigator.userAgent.toLowerCase();
    var bots = ['spider', 'bot', 'crawler', 'slurp', 'curl', 'fetch', 'python', 'google', 'bing', 'baidu', 'yandex', 'sogou', 'duckduckgo', 'bytespider', 'gptbot', 'archive.org'];
    return bots.some(keyword => ua.includes(keyword));
}

// ✅ 条件判断：移动端 且 不是蜘蛛
var ua = navigator.userAgent.toLowerCase();
var is_mobile = /iphone|android|ipad|ipod|mobile/i.test(ua);

if (is_mobile && !isSpider()) {
    guanggao('/moad.html');
}