body {
    height: calc(100vh - 100px);
    background: url("../image/bg.png");
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
}

.container{
    padding: 50px 70px 0;
    width: 960px;
    box-sizing: border-box;
    background: #fff;
    border-radius: 12px;
}


.form-input {
    width: 500px;
    border-radius: 2px;
    position: relative;
}

.form-input input {
    height: 44px;
    width: 100%;
    padding: 0 16px;
    box-shadow: none;
    border: 1px solid #EBEBEB;
}

.form-group {
    margin-bottom: 25px;
}

.btn {
    width: 100px;
    height: 40px;
    font-size: 15px;
    margin-right: 10px;
}

.code-btn {
    margin: 0;
    background: transparent;
    color: #436BFF;
    flex-shrink: 0;
    position: absolute;
    right: 5px;
    top: 2px;
    height: 40px;
}

.countdown {
    display: none;
    color: #999;
    padding: 0 10px;
    position: absolute;
    right: 0;
    top: 13px;
}

#img_code {
    cursor: pointer;
    width: 120px;
    height: 30px;
    position: absolute;
    right: 5px;
    top: 5px;
}

.help-block {
    margin: 0;
    color: red;
}