.page_404 {
    padding: 40px 0;background: #fff;
    font-family: 'Arvo', serif;
}
.page_404 img {
    width: 100%;
}
.four_zero_four_bg {
    background-image: url('https://cdn.dribbble.com/users/285475/screenshots/2083086/dribbble_1.gif');
    height: 400px;
    background-position: center;
}
.four_zero_four_bg h1{
    font-size: 80px;
}
.four_zero_four_bg h3{
    font-size: 80px;
}
.link_404 {
    color: #fff;
    padding: 10px 20px;
    background: #39ac31;
    margin: 20px 0;
    display: inline-block;
    cursor: pointer;
}
.link_404:hover {
    box-shadow: 0 10px 6px -6px #777;
}
.content_box_404 {
    margin-top: -50px;
}