MTP20_WEB_GLOBAL/src/packages/digital/views/user/login/index.less

.login {
    background: var(--app-bg-color);

    &-logo {
        img {
            height: 48px;
        }
    }

    &-form {
        background-color: #111827;
    }

    .van-field__control {
        background-color: #333 !important;
    }
}