.book-page {
  position: relative;
  .cover-header {
    background-image: url(https://img.yzcdn.cn/vant/cat.jpeg);
    width: 100%;
    height: 10rem;
    background-size: cover;
    background-position: center;
    position: relative;
    overflow: hidden;
    z-index: 1;
  }
  .book-content {
    z-index: 9;
    position: absolute;
    top: 9rem;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #FFF;
    border-top-left-radius: 0.5rem;
    border-top-right-radius: 0.5rem;
    overflow: auto;
    height: 100%;
    padding: 1rem 0.75rem;
    .book-calc {}
    .book-type {}
    .book-list {}
  }
}