body{
    background: url("../img/login02.png") 0 0 / 100% 100% no-repeat;
    display: flex;
}
html,body{
    height: 100%;
    width: 100%;
    margin: 0;
    padding: 0;

    display: flex; /**/
    justify-content: center; /*水平居中*/
    align-items: Center; /*垂直居中*/
}
#container{
    height: 296px;
    width: 400px;
    border: 1px solid #2e6da4;
    box-shadow: 0 0 10px #2e6da4;
}
.row{
    margin-top: 15px;
}
.btn-primary{
    margin-top: 18px;
}
.col-form-label{
    font-weight: bold;
    font-size: 15px;
}
.alert-info{
    font-size: 20px;
}
.login_title{
    color:white;
    font-size:16px;
    cursor: pointer;
}
.validation{
    cursor: pointer;
}