.article4 {
    padding-top: 0;
    background-color: #fff;
    overflow: unset;
}

.a4-wrapper {
    position: relative;
    width: 100%;
}

.a4-box {
    position: absolute;
    top: -50px; left: 0;
    width: 670px;
    padding: 30px;
    border-radius: 10px;
    background-color: #e8e8e8;
    box-shadow: 0 0 12px rgba(0, 0, 0, .3);
}

.a4-box h1 {
    color: #c1c1c1;
    font-size: 18px;
    text-decoration: underline;
}

.a4-box p {
    color: #111;
    font-size: 35px;
    font-weight: 600;
    line-height: 1.6;
}

.a4Btn {
    width: fit-content;
    padding: 0 12px 0 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    border-radius: 50px;
    background-color: #fff;
    border: 2px solid #111;
}

.a4Btn p {
    color: #111;
    font-size: 30px;
    font-weight: 800;
}

.a4Btn i {
    color: #aaa;
    font-size: 35px;
}

.a4-text {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: .5rem;
}

.a4-text p {
    font-weight: 700;
}


.a4Btn-wrapper {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 14rem;
}

.a4Btn-wrapper .a4Btn {
    color: #ddd;
    padding: 5px 20px 5px 30px;
    border: 2px solid #ddd;
}

.a4Btn-wrapper .a4Btn p {
    color: #ddd;
    font-weight: 700;
}

.a4Btn-wrapper .a4Btn i {
    color: #ddd;
}

.a4Btn-wrapper .a4Btn-active {
    position: relative;
    border: 2px solid #111;
}

.a4Btn-wrapper .a4Btn-active img {
    position: absolute;
    top: -40px; left: -20px;
    width: 70px;
}

.a4Btn-wrapper .a4Btn-active p {
    color: #111;
}

.a4Btn-wrapper .a4Btn-active i {
    color: #777;
}


/*==================================================*/
@media (max-width: 1250px) {
    .a4Btn p {
        font-size: 22px;
    }

    .a4Btn i {
        font-size: 25px;
    }
    
    .a4Btn-wrapper {
        justify-content: flex-start;
    }

    .a4Btn-wrapper .a4Btn {
        padding: 5px 15px 5px 20px;
    }
}


@media (max-width: 850px) {
    .a4-box {
        width: 100%;
    }
}


@media (max-width: 768px) {
    .a4-text {
        margin-top: 0;
    }
    
    .a4Btn-wrapper {
        margin-top: 12rem;
    }
}


@media (max-width: 550px) {
    .a4-box h1 {
        font-size: 15px;
    }

    .a4-box p {
        font-size: 24px;
    }
    
    .a4Btn p {
        font-size: 18px;
    }

    .a4Btn i {
        font-size: 21px;
    }

    .a4Btn-wrapper {
        margin-top: 9rem;
    }

    .a4Btn-wrapper .a4Btn-active img {
        top: -20px; left: -10px;
        width: 40px;
    }
}


@media (max-width: 450px) {
    .a4-box p,
    .a4-text p {
        font-size: 20px;
    }
}