body {
    position: relative;
}

.main {
    padding-top: 30px;
}

.main-banner {
    margin-top: -55px;
    z-index: 99;
}

.main-block-title {
    font-size: 30px;
    margin-top: 25px;
    margin-bottom: 10px;
}

.login-block {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 250px;
    margin-top: 20px;
    margin-bottom: 5px;
}

.login-block img {
    width: 100%;
}

.login-block p {
    font-size: 15px;
    margin-top: 15px;
    margin-bottom: 15px;
}

/* mobile */
@media (max-width: 767px) {
    .main-banner {
        margin-top: -35px;
    }

    .main-block-title {
        font-size: 25px;
    }

    .main-block-announce {
        font-size: 15px;
    }

    .login-block {
        width: 80%;
        margin-top: 10px;
        margin-bottom: 10px;
    }

    .login-block img {
        width: 75%;
    }

    .login-block p {
        font-size: 12px;
    }
}