/* 
* 功能:幻灯片播放
* 作者:loho
* 日期:2017/9/5
*/
/* ***********公共样式********** */
body,
html,
ul,
li,
div,
a,
span {
  margin: 0;
  padding: 0;
}
body,
html,
ul,
li,
div,
a,
span {
  box-sizing: border-box;
}
ul,
li {
  list-style: none;
}
a {
  text-decoration: none;
}
.nav {
  position: relative;
}
.header,
.headerImg {
  display: inline-block;
}
.close,
.fullscreen,
.fullscreen a {
  position: absolute;
}
.fullscreen a,
.nav .header ul li,
.close {
  cursor: pointer;
}
.nav,
.close,
.fullscreen,
.headerImg,
#prev,
#next {
  transition: all 0.3s cubic-bezier(0.28, 0.59, 0.32, 0.99);
}
/* ***********细节样式********** */
body {
  height: 100%;
  overflow: hidden;
  font: 16px "微软雅黑";
  background-color: #f2f2f2;
}
.nav {
  width: 300px;
  height: 60px;
  margin: 10px auto;
  z-index: 1;
}
.nav .close {
  width: 20px;
  height: 20px;
  background-color: #f5f6f7;
  font: 16px/20px "微软雅黑";
  color: #535353;
  text-align: center;
  box-shadow: 0 2px 8px #f2f2f3;
  border-radius: 50%;
  top: -3px;
  right: -20px;
}
.header {
  font-size: 0;
}
.nav .header ul li {
  width: 60px;
  height: 60px;
  border-radius: 5px;
  float: left;
}
.nav .header .headerImg {
  width: 100%;
  height: 100%;
  background-repeat: no-repeat;
  background-size: cover;
}
#first {
  background-image: url(../img/background_1.jpg);
}
#second {
  background-image: url(../img/background_2.jpg);
}
#third {
  background-image: url(../img/background_3.jpg);
}
#fourth {
  background-image: url(../img/background_4.jpg);
}
#fifth {
  background-image: url(../img/background_5.jpg);
}
.fullscreen {
  width: 100%;
  height: 100%;
  top: 0;
  background: url(../img/background_1.jpg) no-repeat center/cover;
}
.fullscreen a {
  width: 40px;
  height: 40px;
  border: 1px solid #f1f2f3;
  background-color: #f2f3f4;
  color: #535353;
  text-align: center;
  font: 20px/40px "微软雅黑";
  top: 50%;
  transform: translate(0, -50%);
  display: none;
  border-radius: 8px;
}
.fullscreen a:hover,
.fullscreen a:active {
  background-color: #f2f2f2;
  color: #545454;
}
#next {
  right: 10px;
}
#prev {
  left: 10px;
}
/* 媒体查询 */
@media screen and (max-width: 768px) {
  .nav {
    width: 100%;
  }
  .header ul li {
    width: 20%;
  }
  .nav .close {
    right: 0;
  }
}