#saomiao input{
    margin-top:50px;
    height: 70px;
    /*padding:70px*/
    /*width: 350px;*/
    width: 100%;
    border: 3px solid #4d42f5;
    background: #444444;
}
.logodiv{
    height: 50px;
    width: 150px;
    background: #18c8f6;
    background:url("../img/logotest.jpg") no-repeat center fixed;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover
}