body {
    background-color: #fff;
    cursor: pointer;
    font-size: 0;
    height: 100vh;;
    line-height: 0;
    margin: 0;
    overflow: hidden;
    padding: 0;
    width: 100vw;
}

.container {
    background-size: cover;
    background-position: center;
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
}

.container .node {
    background: radial-gradient(#888, #000);
    border-radius: 50%;
    height: 4vw;
    position: fixed;
    transform: translate(-50%, -50%);
    transition: 2s;
    width: 4vw;
}

.leader-line {
    position: fixed !important;
}