html {
    font-family: "Microsoft YaHei", "PingFang SC";
}
body {
    background: #efefef;

}

.form-group {
    width: 300px;
    margin: 50px auto;
    text-align: center;
    background: #fff;
    height: 300px;
    padding: 20px;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    -webkit-box-shadow: 0 0 38px 1px rgba(0,0,0,.1);
    box-shadow: 0 0 38px 1px rgba(0,0,0,.1);
}
.title {
    font-size: 22px;
    font-weight: bold;
    margin-bottom: 10px;
    color: #666;
}
.form-item {
    line-height: 50px;
    font-size: 14px;
    margin-bottom: 10px;
}
.form-item > input {
    height: 24px;
    padding: 5px;
}
.btns {
    font-size: 12px;
    width: 160px;
    margin: 0 auto;
}
.btn {
    width: 70px;
    height: 30px;
}
.btn:first-child {
    float: left;
}
.btn:last-child {
    float: right;
}
.error {
    color: #ff3976;
    height: 20px;
    line-height: 1;
    text-align: left;
    margin-left: 50px;
    display: none;
}