function setCookie(name, value, expiredHour, domain) {
        var date = new Date();
        date.setTime(date.getTime() + 60 * 60 * 1000 * expiredHour);
        document.cookie = name + '=' + value + ';expires=' + escape(date) + ';domain=.' + domain + ';path=/';
    }

    function getMainDomain() {
        const {hostname} = location;
        const domainArr = hostname.split('.');
        const lastSegment = domainArr[domainArr.length - 1];
        // 通过ip访问或者主域名访问
        if (/\d/.test(lastSegment) || domainArr.length <= 2) {
            return hostname;
        }
        const level0 = domainArr.pop();
        const level1 = domainArr.pop();
        return level1 + '.' + level0;
    }