<!DOCTYPE html>
<html>
<head>
</head>
<body>
<style>
body, html {
height: 100%; margin: 0; padding: 0;
}
.yqcontainer {
display: flex; align-items: center; justify-content: center; height: 100%;
}
.yqmessage {
font-size: 3vw; text-align: center;
}
@media screen and (max-width: 1000px){
.yqcontainer .yqmessage {
font-size: 5vw; text-align: center;
}
}
</style>
<div class="yqcontainer">
<div class="yqmessage">
<p>域名已到期，请及时联系域名管理员续费</p>
</div>
</div>
</body>
</html>或：
<style>
#browser-tip {
position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: #fff; z-index: 9999; display: none; display: flex; justify-content: center; align-items: center; flex-direction: column;
}
#browser-tip p {
font-size: 3vw; text-align: center; margin-top: 20px;
}
@media screen and (max-width: 1000px){
#browser-tip p {
font-size: 5vw; text-align: center; margin-top: 20px;
}
}
</style>
<div id="browser-tip">
<p>域名已到期，请及时联系域名管理员续费</p>
</div>