a {
    color: #000;
    text-decoration: none;
}
html, body {
    height: 100%;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;

  }

  .box {
    width: 1920px;
    height: 2638px;
    box-sizing: border-box;
    margin: auto;
  }