/* below 1400px */
@media (max-width: 88em) {
}

/* below 1248px */
@media (max-width: 78em) {
  html {
    font-size: 56.25%;
  }
}

/* below 1120px */
@media (max-width: 70em) {
  .hero-pic {
    right: -10rem;
  }
  .chapter-book-grid {
    max-width: 70rem;
    grid-template-columns: repeat(2, 1fr);
    row-gap: 3.2rem;
    margin: 0 auto;
  }
  .bn-box {
    margin: 0 auto;
    margin-top: 5.6rem;
  }
  .bn-img {
    width: 100%;
  }
}

/* below 944px */
@media (max-width: 59em) {
  html {
    font-size: 50%;
  }
}

/* below 752px */
@media (max-width: 47em) {
  .hero {
    text-align: center;
  }
  .hero-pic {
    top: 35rem;
    right: 0;
  }
  .hero-pic-img {
    width: 100rem;
  }
  .hero-tttb-box {
    margin: 2.4rem auto;
    border-radius: 8px;
    margin-top: 50rem;
  }
  .promotion-box {
    margin: 0 auto;
    margin-top: 5.6rem;
    margin-bottom: 12rem;
    border-radius: 8px;
  }
}

/* below 704px */
@media (max-width: 44em) {
  .hero-tttb-books-grid {
    grid-template-columns: repeat(2, auto);
    gap: 2rem;
  }
  .hero-tttb-box {
    max-width: 50rem;
  }
  .promotion-box {
    max-width: 60rem;
    grid-template-columns: 1fr;
    gap: 2.4rem;
    row-gap: 2.4rem;
  }
  .promotion-gifts {
    flex-direction: row;
    justify-content: center;
    align-items: center;
  }
  .promotion-more-link {
    justify-self: center;
  }
}

/* below 544px */
@media (max-width: 34em) {
  .hero-title-img {
    width: 100%;
  }
  .hero-intro,
  .hero-tttb-box,
  .promotion-box {
    margin-left: 2rem;
    margin-right: 2rem;
  }
  .hero-pic {
    top: 35rem;
    right: -10rem;
  }
  .ipad-img {
    width: 16rem;
  }
  .dot-img {
    width: 4rem;
  }
  .bn-box {
    display: none;
  }
  .bn-box-mb {
    display: block;
    width: 32rem;
    border-radius: 1rem;
    margin: 0 auto;
    margin-top: 4.6rem;
    margin-bottom: 3.2rem;
    overflow: hidden;
  }
  .chapter-title-flex {
    gap: 1.6rem;
  }
  .chapter-book-grid {
    row-gap: 0;
  }
  .chapter-title {
    font-size: 3rem;
  }
  .chapter-title-sm {
    font-size: 2.4rem;
    line-height: 0.8;
  }
  .chapter-title-num {
    font-size: 4rem;
    color: #fee000;
  }
  .more-img {
    width: 10rem;
  }
  .book-box {
    width: 20rem;
    padding: 2rem 0;
    justify-self: center;
  }
  .book-box-lg {
    width: 22rem;
  }
  .book-img {
    height: 24rem;
  }
  .book-img-hor {
    height: 20rem;
  }
  .activity {
    padding-top: 4.6rem;
    margin-top: 3.2rem;
    margin-bottom: 4.6rem;
  }
  .activity-header {
    margin-bottom: 3.2rem;
  }
  .activity-item-context {
    margin-left: 2.4rem;
  }
}
/* below 448px */
@media (max-width: 28em) {
}