#app {
  background-color: #836fb2;
}
.container {
  max-width: 1400px;
  padding: 0 50px;
  width: 100%;
  margin: 0 auto;
}
@media (max-width: 1400px) {
  .container {
    max-width: calc(100% - 30px);
    padding: 0;
  }
}
@media (max-width: 768px) {
  .container {
    max-width: calc(100% - 100px);
  }
}
@media (max-width: 576px) {
  .container {
    max-width: calc(100% - 30px);
  }
}
@media (max-width: 576px) {
  .book-container .container {
    max-width: calc(100% - 30px);
  }
}
.promote-container {
  display: flex;
  padding: 90px 0 50px;
}
@media (max-width: 768px) {
  .promote-container {
    display: block;
    padding: 20px 0 0;
  }
}
@media (max-width: 576px) {
  .promote-container {
    padding: 50px 0 0;
  }
}
.promote-vertical {
  display: flex;
  flex-wrap: wrap;
  margin: 0 10px 0 0;
  flex: 0 1 30%;
  background-color: #fff;
}
@media (max-width: 768px) {
  .promote-vertical {
    margin: 0 0 20px 0;
    align-items: flex-start;
    justify-content: flex-start;
    width: 100%;
  }
}
.promote-vertical-content {
  padding: 0 70px 15px 70px;
  display: flex;
  flex-wrap: wrap;
  height: calc(100% - 330px);
}
@media (max-width: 768px) {
  .promote-vertical-content {
    padding: 40px 0 45px 12px;
    height: auto;
  }
}
@media (max-width: 576px) {
  .promote-vertical-content {
    padding: 13px 0 5px 12px;
  }
}
@media (max-width: 320px) {
  .promote-vertical-content {
    padding: 0 0 0 12px;
  }
}
.promote-vertical-img {
  padding: 15px 35px;
  height: 300px;
  margin: 0 auto;
}
@media (max-width: 768px) {
  .promote-vertical-img {
    padding: 0;
    height: 290px;
    flex: 0 0 260px;
  }
}
@media (max-width: 576px) {
  .promote-vertical-img {
    height: 180px;
    flex: 0 0 160px;
  }
}
@media (max-width: 320px) {
  .promote-vertical-img {
    height: 140px;
    flex: 0 0 130px;
  }
}
.promote-vertical-img img {
  width: 100%;
  height: 100%;
  -o-object-fit: contain;
     object-fit: contain;
  -o-object-position: center;
     object-position: center;
}
@media (max-width: 768px) {
  .promote-vertical a {
    display: flex;
    padding: 25px;
  }
}
@media (max-width: 576px) {
  .promote-vertical a {
    padding: 15px;
  }
}
@media (max-width: 320px) {
  .promote-vertical a {
    padding: 10px;
  }
}
.promote-list {
  flex: 0 1 70%;
  display: flex;
  flex-wrap: wrap;
}
@media (max-width: 768px) {
  .promote-list {
    display: block;
    width: 100%;
  }
}
.promote-list > .promote-item:nth-child(1),
.promote-list > .promote-item:nth-child(2) {
  margin: 0 10px 20px 10px;
}
@media (max-width: 768px) {
  .promote-list > .promote-item:nth-child(1),
  .promote-list > .promote-item:nth-child(2) {
    margin: 0 0 20px;
  }
}
.promote-content {
  display: flex;
  flex-wrap: wrap;
  padding: 10px 0 0 12px;
}
@media (max-width: 768px) {
  .promote-content {
    padding: 40px 0 45px 12px;
  }
}
@media (max-width: 576px) {
  .promote-content {
    padding: 13px 0 5px 12px;
  }
}
@media (max-width: 320px) {
  .promote-content {
    padding: 0 0 0 12px;
  }
}
.promote-item {
  padding: 16px;
  display: flex;
  margin: 0 10px;
  flex: 0 1 calc(50% - 20px);
  background-color: #fff;
}
@media (max-width: 768px) {
  .promote-item {
    padding: 25px;
    margin: 0 0 20px;
  }
}
@media (max-width: 576px) {
  .promote-item {
    padding: 15px;
  }
}
@media (max-width: 320px) {
  .promote-item {
    padding: 10px;
  }
}
.promote-item-title {
  height: 90px;
  font-size: 24px;
  font-weight: 600;
  width: 100%;
  display: -webkit-box;
  overflow: hidden;
  text-overflow: ellipsis;
  -webkit-line-clamp: 3;
/* autoprefixer: off */
  -webkit-box-orient: vertical;
  line-height: 1.25;
}
@media (max-width: 576px) {
  .promote-item-title {
    font-size: 20px;
    height: 75px;
  }
}
@media (max-width: 320px) {
  .promote-item-title {
    font-size: 18px;
    height: 65px;
  }
}
.promote-item-des {
  line-height: 1.5;
  padding-top: 15px;
  align-self: flex-end;
  display: -webkit-box;
  overflow: hidden;
  text-overflow: ellipsis;
  -webkit-line-clamp: 3;
/* autoprefixer: off */
  -webkit-box-orient: vertical;
}
@media (max-width: 320px) {
  .promote-item-des {
    font-size: 14px;
    padding-top: 7px;
  }
}
.promote-item-des:before {
  content: '';
  display: block;
  width: 55px;
  height: 1px;
  background-color: #371f77;
  margin-bottom: 15px;
}
@media (max-width: 320px) {
  .promote-item-des:before {
    margin-bottom: 10px;
  }
}
.promote-item-img {
  height: 220px;
  flex: 0 0 200px;
}
@media (max-width: 768px) {
  .promote-item-img {
    height: 290px;
    flex: 0 0 260px;
  }
}
@media (max-width: 576px) {
  .promote-item-img {
    height: 180px;
    flex: 0 0 160px;
  }
}
@media (max-width: 320px) {
  .promote-item-img {
    height: 140px;
    flex: 0 0 130px;
  }
}
.promote-item-img img {
  width: 100%;
  height: 100%;
  -o-object-fit: contain;
     object-fit: contain;
  -o-object-position: center;
     object-position: center;
}
.feature-container {
  position: relative;
  padding: 100px 0 65px;
  background-color: #644b9f;
}
@media (max-width: 576px) {
  .feature-container {
    padding: 30px 0 20px;
  }
}
.feature-container:before {
  content: '';
  position: absolute;
  top: 0px;
  left: 0px;
  width: 100%;
  background: url("../img/bg-arc-bottom.svg");
  background-size: 100% auto;
  background-repeat: no-repeat;
  padding-bottom: 3.7%;
}
.feature-item-wrapper {
  display: flex;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
}
@media (max-width: 768px) {
  .feature-item-wrapper {
    margin-top: 60px;
  }
}
.feature-item-wrapper > * {
  flex: 0 0 calc(100% / 3 - 30px);
}
@media (max-width: 768px) {
  .feature-item-wrapper > * {
    flex: 0 0 100%;
    margin-bottom: 30px;
    display: block;
  }
}
.feature-item-wrapper > * + * {
  margin-left: 45px;
}
@media (max-width: 768px) {
  .feature-item-wrapper > * + * {
    margin-left: 0;
  }
}
@media (max-width: 1200px) {
  .feature-item-wrapper {
    max-width: 100%;
  }
}
@media (max-width: 768px) {
  .feature-item-wrapper {
    display: block;
  }
}
.feature-item-title {
  display: flex;
  justify-content: center;
  font-size: 24px;
  color: #fff;
  padding-top: 15px;
}
@media (max-width: 576px) {
  .feature-item-title {
    margin: 0 0 30px 0;
    font-size: 20px;
  }
}
.feature-item-title span {
  display: -webkit-box;
  overflow: hidden;
  text-overflow: ellipsis;
  -webkit-line-clamp: 3;
/* autoprefixer: off */
  -webkit-box-orient: vertical;
}
.feature-item-img {
  padding-bottom: 75%;
  position: relative;
}
.feature-item-img img {
  margin: 0 auto;
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 100%;
  width: 100%;
  -o-object-fit: cover;
     object-fit: cover;
  -o-object-position: center;
     object-position: center;
}
@media (max-width: 768px) {
  .feature-item-img img {
    max-width: initial;
    width: 100%;
  }
}