.main-scenery {
  width: 1300px;
  height: 4000px;
  margin: 110px auto;
}
.main-scenery .nav {
  position: relative;
  width: 1300px;
  height: 650px;
}
.main-scenery .nav .topic {
  position: absolute;
  top: -60px;
  left: 366px;
  font-size: 38px;
}
.main-scenery .nav .etc {
  width: 1300px;
  height: 600px;
}
.main-scenery .nav .etc :nth-child(3n) {
  margin-right: 0;
}
.main-scenery .nav .etc li {
  float: left;
  width: 400px;
  height: 250px;
  margin-right: 50px;
  margin-top: 30px;
  border-radius: 10px;
  overflow: hidden;
  position: relative;
}
.main-scenery .nav .etc li img {
  width: 100%;
  height: 100%;
}
.main-scenery .nav .etc li .mask {
  position: absolute;
  top: 0;
  right: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(26, 23, 23, 0.8);
  z-index: 900;
  text-align: center;
  display: none;
}
.main-scenery .nav .etc li .mask h3 {
  color: #fff2f2;
  font-size: 40px;
  font-weight: 500;
  text-align: center;
  margin-top: 70px;
}
.main-scenery .nav .etc li .mask a {
  width: 110px;
  height: 45px;
}
.main-scenery .nav .etc li .mask a button {
  padding: 0 25px;
  height: 45px;
  font-size: 15px;
  margin-top: 30px;
  border-radius: 25px;
  border: none;
  cursor: pointer;
}
.main-scenery .info-scenery {
  width: 1300px;
  height: 3350px;
  background-color: white;
}
.main-scenery .info-scenery li {
  width: 1300px;
  height: 520px;
  background-color: rgba(169, 218, 255, 0.2);
  margin-bottom: 40px;
  overflow: hidden;
  border-radius: 10px;
  box-shadow: 0 5px 10px #ddd;
}
.main-scenery .info-scenery li .banner {
  width: 1100px;
  height: 400px;
  margin: 60px auto;
  box-shadow: 0 5px 10px #ddd;
}
.main-scenery .info-scenery li .banner img {
  height: 400px;
  width: 500px;
}
.main-scenery .info-scenery li .banner div {
  box-sizing: border-box;
  width: 600px;
  height: 400px;
  padding: 15px 70px;
  border: 1px solid rgba(200, 200, 200, 0.5);
  background-color: rgba(114, 194, 255, 0.1);
}
.main-scenery .info-scenery li .banner div h3 {
  font-size: 35px;
  font-weight: 400;
  color: #0084ff;
  padding-bottom: 17px;
}
.main-scenery .info-scenery li .banner div p {
  font-size: 15px;
  line-height: 28px;
  text-indent: 2em;
}
.main-scenery .info-scenery li .banner div p:nth-child(4) {
  text-indent: 0em;
}
.main-scenery .info-scenery li:nth-child(2n+1) .banner img {
  float: left;
}
.main-scenery .info-scenery li:nth-child(2n+1) .banner div {
  border-radius: 0 15px 15px 0;
  float: left;
}
.main-scenery .info-scenery li:nth-child(2n) .banner img {
  float: right;
}
.main-scenery .info-scenery li:nth-child(2n) .banner div {
  border-radius: 15px 0 0 15px;
  float: right;
}
.top {
  cursor: pointer;
  width: 40px;
  height: 40px;
  position: fixed;
  bottom: 185px;
  right: 40px;
  line-height: 40px;
  text-align: center;
  border-radius: 20px;
  background: url(../img/go-top.svg) no-repeat;
  background-position: center;
  background-size: 20px 20px;
  background-color: #fdfdfd;
  box-shadow: 0 2px 6px 0 rgba(0, 0, 0, 0.1);
}