body{
    padding-top: 40px;
    padding-bottom: 40px;
    background: rgb(90,90,90) url('http://ww1.sinaimg.cn/large/0069qWFHgw1f0f9bags54j31hc0pzk3d.jpg') no-repeat fixed top;
    background-size:100% 100%;
    line-height: 1.5;
}
a{
    text-decoration: none;
    margin: 0 3px;
}
.main-box{
    margin:5% auto 0;
    background:#fff;
    width:350px;
    padding: 25px;
}

.form-control,.btn{
    border-radius: 0;
}
.vcode{
    display: inline-block;
    width: 200px;
    margin-right: 0;
}
.form-header{
    font-family: '微软雅黑';
    margin: 0 0 10px;
    text-align: center;
}
.form-header img{
    height: 48px;
    width: 48px;
}
.extra{
    font-size: 12px;
    display: inline-block;
    margin:10px 10px 0 0;
}