.article4 {
    position: relative;
    padding-bottom: 400px;
    justify-content: flex-start;
    background: url(../images/a4-bg.jpg);
    background-position: top !important;
    overflow: hidden;
}

.a4-s1 {
    position: absolute;
    top: 36%; right: 7%;
    z-index: 11;
}

.a4-s2 {
    position: absolute;
    top: 50%; left: 5%;
    z-index: 11;
}

.a4-s3 {
    position: absolute;
    top: 63%; right: 10%;
    z-index: 11;
}

#snow {
    position: absolute;
    top: 0;
    width: 100%;
    height: 100%;
    display: none;
}

.snowflake {
    position: absolute;
    width: 12px;
    height: 12px;
    background: linear-gradient(white, white);
    border-radius: 50%;
    filter: drop-shadow(0 0 10px white);
}

.icecube {
    position: absolute;
    bottom: 0;
    width: 100%;
    z-index: 1;
}

.a4-title {
    margin-bottom: 5rem;
    z-index: 10;
}

.a4-circle {
    position: relative;
    z-index: 10;
}

.a4-ctext {
    position: absolute;
    top: 0; left: 0;
    animation: rotate infinite 9s linear;
}



/*==================================================*/
@media (min-width: 2250px) {
    .article4 {
        padding-bottom: 500px;
    }
    
    .a4-s1 {
        right: 17%;
    }
    
    .a4-s2 {
        left: 15%;
    }

    .a4-s3 {
        right: 20%;
    }
}


@media (max-width: 1850px) {
    .a4-s1 {
        right: 20px;
        width: 25%;
    }
    
    .a4-s2 {
        left: 20px;
        width: 25%;
    }
    
    .a4-s3 {
        right: 20px;
        width: 25%;
    }
    
    .a4-circle {
        width: 50%;
    }

    .a4-plate {
        width: 100%;
    }
    
    .a4-ctext {
        width: 100%;
    }
}


@media (max-width: 1350px) {
    .article4 {
        padding-bottom: 30%;
    }
    
    .a4-title {
        width: 75%;
    }
}


@media (max-width: 768px) {
    .a4-s1 {
        right: 10px;
        width: 30%;
    }
    
    .a4-s2 {
        left: 10px;
        width: 30%;
    }
    
    .a4-s3 {
        right: 10px;
        width: 30%;
    }
    
    .a4-circle {
        width: 75%;
    }

    .a4-title {
        margin-bottom: 3rem;
    }
}


@media (max-width: 550px) {
    .snowflake {
        width: 8px;
        height: 8px;
    }
    
    .a4-s1,
    .a4-s2,
    .a4-s3 {
        width: 35%;
    }
    
    .a4-title {
        width: 90%;
        margin-bottom: 4rem;
    }
}