/* 图片放大 */
.img_scale {
  overflow: hidden;
}
.img_scale img {
  transition: transform cubic-bezier(0.215, 0.61, 0.355, 1) 1s;
  -ms-transition: transform cubic-bezier(0.215, 0.61, 0.355, 1) 1s;
  -o-transition: transform cubic-bezier(0.215, 0.61, 0.355, 1) 1s;
  -webkit-transition: transform cubic-bezier(0.215, 0.61, 0.355, 1) 1s;
  -moz-transition: transform cubic-bezier(0.215, 0.61, 0.355, 1) 1s;
}
.img_scale:hover img {
  transform: scale(1.1);
  -ms-transform: scale(1.1);
  -o-transform: scale(1.1);
  -webkit-transform: scale(1.1);
  -moz-transform: scale(1.1);
}
.img_scale:hover .full {
  transform: scale(1.1);
  -ms-transform: scale(1.1);
  -o-transform: scale(1.1);
  -webkit-transform: scale(1.1);
  -moz-transform: scale(1.1);
}
article {
  background-image: url(../image/zixunbg.jpg);
}
.navpic {
  width: 100%;
  height: 621px;
  /* background: url(../images/library4.jpg) no-repeat; */
}
.navpic img {
  width: 100%;
  height: 100%;
}
.content {
  width: 100%;
  padding: 150px 0 197px 0;
  box-sizing: border-box;
}
.library {
  width: 68.75%;
  height: 682px;
  margin: 0 auto;
  position: relative;
}
.library img {
  width: 100%;
  height: 100%;
}
.hanshan {
  margin: 96px auto;
}
.btn {
  width: 250px;
  height: 72px;
  font-family: "宋体";
  background-color: #fff;
  color: #2d2d2d;
  font-size: 22px;
  text-align: center;
  font-family: serif;
  line-height: 72px;
  border-radius: 5px;
  position: absolute;
  top: 415px;
  left: 50%;
  transform: translateX(-50%);
}
@media (max-width: 1440px) {
  .navpic {
    width: 100%;
    height: 500px;
    background-size: contain ;
  }
  .library {
    width: 68.75%;
    height: 470px;
    background-size: contain;
    position: relative;
  }
  .btn {
    width: 200px;
    height: 50px;
    line-height: 50px;
    font-size: 24px;
    border-radius: 5px;
    position: absolute;
    top: 55%;
    left: 50%;
    transform: translateX(-50%);
  }
  .content {
    padding: 100px 0 200px 0;
    box-sizing: border-box;
  }
  .hanshan {
    margin: 80px auto;
  }
}
@media screen and (max-width: 992px) {
  .navpic {
    width: 100%;
    height: 400px;
    background-size: contain ;
  }
  .library {
    width: 68.75%;
    height: 300px;
    background-size: 100% 100% auto;
    position: relative;
  }
  .btn {
    width: 150px;
    height: 50px;
    line-height: 50px;
    font-size: 22px;
    border-radius: 5px;
    position: absolute;
    top: 58%;
    left: 50%;
    transform: translateX(-50%);
  }
  .content {
    padding: 70px 0 120px 0;
    box-sizing: border-box;
  }
  .hanshan {
    margin: 59px auto;
  }
}
@media (max-width: 768px) {
  .navpic {
    width: 100%;
    height: 280px;
    background-size: contain ;
  }
  .library {
    width: 75%;
    height: 250px;
    background-size: 100% auto;
    position: relative;
  }
  .btn {
    width: 120px;
    height: 35px;
    line-height: 35px;
    font-size: 18px;
    border-radius: 3px;
    position: absolute;
    top: 54%;
    left: 50%;
    transform: translateX(-50%);
  }
  .content {
    padding: 50px 0 90px 0;
    box-sizing: border-box;
  }
  .hanshan {
    margin: 40px auto;
  }
}
@media screen and (max-width: 480px) {
  .navpic {
    width: 100%;
    height: 180px;
    background-size: contain ;
  }
  .library {
    width: 85%;
    height: 170px;
    position: relative;
  }
  .btn {
    width: 85px;
    height: 25px;
    line-height: 25px;
    font-size: 14px;
    border-radius: 3px;
    position: absolute;
    top: 56%;
    left: 50%;
    transform: translateX(-50%);
  }
  .content {
    padding: 50px 0 90px 0;
    box-sizing: border-box;
  }
}