html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    line-height: 1;
}
img {
    display: block;
    width: 100%;
    height: 100%;
}
.link {
    position: absolute;
    top: 74%;
    left: 0;
    right: 0;
    margin: 0 auto;
    width: 47%;
    height: 8%;
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}
@media only screen and (device-width: 375px) and (device-height: 812px) and (-webkit-device-pixel-ratio: 3) {
    .link {
        top: 75%;
        height: 7%;
    }
}