padding-top:30px;
text-align:center;
}
background-color:#444;
color:#eee;
h3{
404
font-weight:normal;
font-size:60px;
text-align:center;
}
404，您请求的文件不存在!
background-color:#444;
color:#eee;
h3{
font-weight:normal;
font-size:60px;