.explain{
    padding-top:50px;
    text-align: center;
    background: #fff;
    min-height: 300px;
}
.explain h4,.explain h2,.explain_form{
    margin-top:30px;
}
.explain_form{
    width:100%;
}
.form_content{
    width: 500px;
    margin: 0 auto;
    font-size: 14px;
}