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

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

/* below 1120px */
@media (max-width: 70em) {
  .section-hero {
    background-image: url("images/bg-hero-md.jpg");
    padding: 6.4rem 0;
  }
  .hero {
    margin-left: auto;
    margin-right: auto;
  }
  .hero-grid {
    grid-template-columns: repeat(1, auto);
    justify-content: flex-start;
    margin-bottom: 20rem;
    margin-left: 5%;
  }
  .hero-title-grid {
    margin-bottom: 2.4rem;
  }
  .hero-subtitle {
    max-width: 60rem;
    /* color: #000001; */
    padding-top: 0;
  }
  .promotion-intro-grid {
    grid-template-columns: repeat(1, auto);
    justify-content: center;
    gap: 6.4rem;
  }
  .promotion-box {
    grid-row: 1;
    right: auto;
  }
  .chapter-title-flex {
    padding-top: 3.2rem;
  }
  .chapter-book-grid {
    max-width: 70rem;
    grid-template-columns: repeat(2, 1fr);
    row-gap: 3.2rem;
    margin: 0 auto;
  }
  .bn-box {
    margin: 0 2.4rem;
    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-title-yesr-end-img {
    width: 50rem;
  }
  .hero-title {
    display: none;
  }
  .hero-title-center {
    display: block;
  }
  .hero-grid {
    justify-content: center;
    margin-bottom: 9rem;
    margin-left: auto;
    gap: 12rem;
  }
  .hero-book {
    justify-self: center;
  }
  .hero-book-img {
    height: 40rem;
  }
  .hero-title-grid {
    grid-template-columns: 1fr;
    gap: 2.4rem;
    justify-content: center;
  }
  .hero-title-author {
    grid-row: 1;
  }
  .hero-subtitle {
    max-width: 60rem;
    color: #000001;
    justify-self: center;
    margin: 0 2.4rem;
    text-align: justify;
  }
}

/* below 560px */
@media (max-width: 35em) {
  .hero-title-yesr-end-img {
    width: 95%;
  }
  .hero-title-img {
    width: 50rem;
  }
  .hero-intro {
    max-width: 50rem;
    padding: 2.4rem 4.6rem;
    margin-bottom: 3.2rem;
  }
  .promotion-box {
    padding: 2rem;
    text-align: left;
    margin: 0 2.4rem;
  }
}

/* below 544px */
@media (max-width: 34em) {
  .hero {
    text-align: center;
  }
  .hero-grid {
    margin-bottom: 4.6rem;
  }
  .hero-title-img {
    width: 95%;
  }
  .hero-author {
    text-align: left;
    margin-left: 3%;
  }
  .hero-book-img {
    height: 40rem;
  }
  .hero-book-grid {
    margin-right: 5%;
  }
  .hero-intro {
    margin: 0 2.4rem;
  }
  .intro-pic-img {
    width: 40rem;
  }
  .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-book-grid {
    row-gap: 0;
  }
  .chapter-title {
    font-size: 3rem;
  }
  .chapter-title-num {
    font-size: 4rem;
    color: #fee000;
  }
  .more-img {
    width: 7rem;
  }
  .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) {
}