.main-right{
    width: 100%;
    margin-left: 0;
}
.msg_form{
    width: 600px;
    margin: 50px auto ;
}
.form_item{
    width: 100%;
    height: 40px;
    margin-top: 10px;
    line-height: 40px;
}
.form_item span{
    display: block;
    width: 10%;
    float: left;
    font-size: 16px;
}
.form_item span i{
    color: red;
}
.form_item input{
    display: block;
    width: 90%;
    height: 40px;
    float: left;
    border: 0;
    border-bottom: 1px solid #ccc;
    padding-left: 10px;
    box-sizing: border-box;
    font-size: 16px;
}
.form_item textarea{
    display: block;
    width: 90%;
    height: 100px;
    float: left;
    padding: 8px;
    box-sizing: border-box;
    font-size: 16px;
    resize: none;
}
.form-btn{
    display: block;
    width: 100px;
    height: 36px;
    background-color: #007bc5;
    color: #fff;
    font-size: 16px;
    text-align: center;
    line-height: 36px;
    border-radius: 4px;
    float: right;
    margin-top: 20px;
}