在<head> 里面添加一段js代码。其中 https://i.998.com是指定的跳转H5地址，对应的H5站点多少就配置多少。
<script>
var isAndroid = (/android/gi).test(navigator.appVersion);
var isIPadDevice = (/ipad/gi).test(navigator.appVersion);
var isIDevice = (/iphone/gi).test(navigator.appVersion);
var isPlaybook = (/playbook/gi).test(navigator.appVersion);
var isTouchPad = (/hp-tablet/gi).test(navigator.appVersion);
var isWindowsPhone = (/windows phone/gi).test(navigator.appVersion);
var isHasLinux = (/linux/gi).test(navigator.appVersion);
var isGecko = (/gecko/gi).test(navigator.appVersion);
if (isAndroid || isIDevice || isWindowsPhone || (isHasLinux && isGecko)) {
window.location.href = 'https://i.998.com';
}
</script>
