html,
body {
    height: 100%;
}

body {
    background-color: #002a56;
	background-image: radial-gradient(#0036b1,#040529);
}

.login-form {
    background-color: #fff;
    width: 480px;
    padding: 50px;
    position: relative;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}
.layui-panel {
    border-radius: 7px;
}
.login-form .login-title {
    margin-bottom: 20px;
    text-align: center;
}

.login-form input {
    padding-left: 38px;
}

.login-form .layui-form-item .layui-icon {
    display: inline-block;
    height: 38px;
    width: 38px;
    line-height: 38px;
    text-align: center;
    position: absolute;
}

.login-form input[name="captcha"] {
    width: 256px;
    display: inline-block;
    margin-right: 1px;
}

#particles-js {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    overflow: hidden;
}

#captcha {
    width: 120px;
    height: 40px;
}