*{
    margin: 0px;
    padding: 0px;
}
#box{
    min-width: 1100px;
}
.form{
    width:400px;
    margin: 200px auto;
    box-shadow: 0px 0px 10px 0px #aaa;
    padding:40px;
    background-color: rgba(250,250,250,0);
}
.yzmbox{
    padding-left: 10px;
    box-sizing: border-box;
}
.yzmbox > img{
    width:120px;
    height:40px;
    display: block;
}