.main{
    width:702px;
    min-height: 547px;
    margin: 100px auto;
    background: url(/static/public/image/404.png);
    overflow: hidden;
}
.title{
    color: #aaa;
    text-align: center;
    margin: 188px auto 10px auto;
}
a{
    margin: 18px auto;
    text-align: center;
    text-decoration: none;
    line-height: 35px;
    color: #fff;
    display: block;
    width: 300px;
    background-color: rgb(162, 212, 255);
    border: 1px solid rgb(141, 171, 255);
    border-radius: 8px;
}