body,
html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100vh;
    font-family: sans-serif;
}

.section_top {
    width: 100%;
    height: 100%;
    overflow: hidden;
    position: relative;
    background-image: url(images/3.png);
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    text-align: center;
    justify-content: center;
    animation: change 10s infinite ease-in-out;
}

.content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);

}

.content h1 {
    color: black;
    font-size: 60px;
    letter-spacing: 15px;
}

.content a {
    background: #85c1ee;
    padding: 10px 24px;
    text-decoration: none;
    font-size: 18px;
    border-radius: 20px;
}

.content a:hover {
    background: #3e59e0;
    color: #fff;
}

@keyframes change {
    0% {
        background-image: url(images/1.png);
    }

    20% {
        background-image: url(images/2.png);
    }

    40% {
        background-image: url(images/3.png);
    }

    60% {
        background-image: url(images/4.png);
    }

    80% {
        background-image: url(images/6.png);
    }

    100% {
        background-image: url(images/1.png);
    }
}