html{
    background-image: url(../images/login.png);
    background-size: 100% 100%;
}

.sunmu-login-card{
    background-color: #FFF;
    width: 300px;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0px 0px 12px rgba(0, 0, 0, .12);
}
.login-title{
    text-align: center;
    margin-bottom: 30px;
    display: block;
}

.captcha{
    width: 304px;
    margin: 0 auto;
    display: flex;
    flex-wrap: nowrap;
    justify-content: space-between;
}