*{
  margin: 0;
  padding: 0;
}
.container {
margin: 0 auto;
}
.ml_nav ul {
  padding-left:0;
}
.header {
  width: 100%;
  background-color: #fff;
}
.logo {
  width: 1200px;
  height:  100px;
  display: flex;
  align-items: center;
  margin: 0 auto;
}

.page-container {
  width: 100%;
  background: url('../../images/kzdzs/page-bg.png') no-repeat center center;
  background-size: cover;
  padding-bottom: 120px;
}

.page-container .page-main{
  width: 1200px;
  margin: 0 auto;
}
.page-container .page-title {
  text-align: center;
}
.page-container .book {
  position: relative;
  height: 875px;
  padding-top: 16px;
  padding-bottom: 10px;
  background: rgba(255, 255, 255, 0.8);
  box-shadow: 0px 0px 10px 7px rgba(30, 51, 27, 0.25);
}

.controls #prevBtn {
  position: absolute;
  left: -100px;
  top: 50%;
  transform: translateY(-50%);
  cursor: pointer;
}

.controls #nextBtn {
  position: absolute;
  right: -100px;
  top: 50%;
  transform: translateY(-50%);
  cursor: pointer;
}

@media(max-width: 768px){
  .logo {
    width: 100%;
  }
  .page-container .page-main {
    width: 100%;
  }
  .page-title img{
    width: 70%;
  }
  .page-container {
    padding-bottom: 80px;
  }
  .page-container .book {
    height: 475px;
  }
  .controls {
    position: relative;
    margin-top: 20px;
  }
  .controls img {
    width: 38px;
  }
  .controls #prevBtn {
    left: 30%;
    bottom: 0;
  }
  .controls #nextBtn {
    right: 30%;
    bottom: 0;
  }
}