.main {
    margin-top: 50px;
}
.image404 {
    margin-bottom:20px;
    position:relative;
}
.send_message_btn{
    width:200px;
    height:50px;
    background: #3085d6;
    font-size:20px;
    color:#ffffff;
    font-weight:bold;
    border-radius:12px;
    position:absolute;
    bottom:100px;
    left:50%;
    margin-left:-100px;
    display:flex;
    align-items:center;
    justify-content:center;
}
.image404 img {
    width: 100%;
}
.alert_text_container{
    width:960px;
    margin:0 auto;
    font-size: 20px;
    line-height:1.5;
    font-weight: 700;
}
.alert_text_firstline{
    text-align:left;
    margin-bottom:10px;
}
.alert_text {
    text-align:left;
}
.alert_text_lastline{
    text-align:right;
    margin-top:20px;
}
.taian-logo {
    text-align: center;
    margin: 50px auto;
}

@media(max-width:1440px) {

}
@media(max-width:991px) {
    .main{
        margin:50px 0px 30px 0px;
    }
    .alert_text_container{
        width:100%;
        padding:0px 80px;
    }
}
@media(max-width:768px) {
    .alert_text_container{
        font-size:18px;
        padding:0px 50px;
    }
    .image404 {
        background-image:none;
        height:auto;
    }
    .image404 img {
        width: 100%;
        display:inline;
    }
    .send_message_btn{
        width:150px;
        margin-left:-75px;
        bottom:80px;
    }
}
@media(max-width:540px) {
    .send_message_btn{
        width:120px;
        margin-left:-60px;
        bottom:50px;
    }
}
@media(max-width:480px) {
    .send_message_btn{
        width:100px;
        height:46px;
        font-size:18px;
        margin-left:-50px;
        bottom:50px;
    }
}