form{
    display: flex;
    flex-direction: column;
    align-items: center;
}
input,textarea{
    height: 40px;
    margin: 10px;
    width: 600px;
    font-size: 18px;
    padding: 0 10px;
}
textarea{
    height: 300px;
    line-height: 30px;
}
.liuyantitle{
    text-align: center;
    font-size: 40px;
    margin: 50px;
}