body {
  height: 100%;
  overflow-x: hidden;
  min-width: 960px;
}

.head-nav li:nth-child(4) a {
  /* color: #000; */
  font-weight: 700;
  color: #0997FF;
}

.about_first {
  width: 100%;
  height: 638px;
  background: url('./../img/about_bg.jpg') no-repeat;
  background-size: 100% 100%;
  overflow: hidden;
}

.about_first .text_box {
  width: 690px;
  height: 180px;
  margin: 210px auto;
}

.about_first .text_box img {
  width: 100%;
}

/* 牛啦简介 */

.intro {
  width: 100%;
}

.intro_box {
  width: 70%;
  margin: 0 auto;
  text-align: center;
  line-height: 2;
  max-width: 1280px;
}

.intro_box p {
  font-size: 26px;
  color: #666666;
  letter-spacing: 0;
  text-align: justify;
  margin-bottom: 60px;
}

.intro_box .tit-1 {
  font-size: 50px;
  position: relative;
  color: #252525;
  text-align: center;
  margin-top: 150px;
  margin-bottom: 120px;
}

.tit-1::after {
  content: '';
  display: block;
  width: 80px;
  height: 6px;
  position: absolute;
  background-color: #0177CA;
  left: 50%;
  /* top: 16px; */
  bottom: 0;
  transform: translateX(-40px);
}

/* 大事件 */

.staggerer {
  width: 100%;
}

.staggerer .staggerer_bg {
  width: 100%;
  height: 518px;
  background: url('./../img/dashijian_bg.jpg') no-repeat;
  background-size: 100% 100%;
  display: table;
}

.staggerer_bg .tit-1 {
  font-size: 60px;
  color: #FFFFFF;
  position: relative;
  text-align: center;
  display: table-cell;
  vertical-align: middle;
}

.staggerer_bg .tit-1::after {
  content: '';
  display: block;
  width: 120px;
  height: 6px;
  position: absolute;
  background-color: #0177CA;
  left: 50%;
  top: 60%;
  bottom: 0;
  transform: translateX(-60px);
}

/* 时间轴 */

.timeLine {
  width: 100%;
}

.timeLine_box {
  width: 80%;
  height: 100%;
  margin: 0 auto;
  position: relative;
}

.timeLine_box .line {
  width: 1px;
  height: 94%;
  background: #CDDDF5;
  position: absolute;
  left: 50%;
  top: 1%;
  transform: translateX(-1px);
}

/* 内容部分 */

.timeLine_box .text {
  width: 80%;
  margin: 0 auto;
  margin-top: 150px;
}

.timeLine_box .item {
  width: 100%;
  margin-bottom: 20px;
}

.timeLine_box .item div {
  float: left;
  width: 50%;
}

.timeLine_box .item .left {
  text-align: right;
  padding-right: 40px;
}

.timeLine_box .item .left_text2 {
  text-align: right;
}

.timeLine_box .item .right {
  text-align: left;
  padding-left: 40px;
}

.year {
  font-size: 28px;
  color: #0177CA;
  letter-spacing: 0;
  text-align: justify;
  line-height: 46px;
  font-weight: 500;
}

.month {
  font-size: 24px;
  color: #333333;
  letter-spacing: 0;
  text-align: justify;
  line-height: 46px;
  position: relative;
}

.details {
  font-size: 18px;
  color: #666666;
  letter-spacing: 0;
  text-align: justify;
  line-height: 40px;
}

/* .month::before {} */

.right.month::before {
  display: block;
  content: '';
  width: 10px;
  height: 10px;
  background-color: #CDDDF5;
  position: absolute;
  left: 0;
  top: 18px;
  margin-left: -5px;
  border-radius: 50%;
}

.left.month::before {
  display: block;
  content: '';
  width: 10px;
  height: 10px;
  background-color: #CDDDF5;
  position: absolute;
  top: 18px;
  right: 0;
  margin-right: -5px;
  border-radius: 50%;
}

/*清除浮动代码*/

.clearfix:after {
  display: block;
  content: '';
  clear: both;
  visibility: hidden;
  height: 0;
}

.clearfix:after {
  zoom: 1;
}

.niula {
  font-size: 40px;
  color: #0177CA;
  letter-spacing: 0;
  text-align: center;
  margin-top: 95px;
}

/* 地图部分 */

.map {
  width: 100%;
  margin-top: 70px;
  margin-bottom: 150px;
  position: relative;
}

.map_box {
  width: 80%;
  height: 510px;
  margin: 0 auto;
}

.map .info {
  /* width: 200px; */
  /* height: 100px; */
  background-color: #000;
  opacity: 0.5;
  position: absolute;
  left: 52%;
  top: 50%;
  border-radius: 10px;
  text-align: left;
  color: #fff;
  font-size: 15px;
  line-height: 2;
  padding: 18px;
}

.map .info .gs {
  font-size: 24px;
  text-align: center;
}

.infohid {
  display: none
}

.title {
  width: 100%;
  font-size: 15px;
  color: #FFFFFF;
  /* text-align: center; */
}

.title22 {
  font-size: 15px;
  color: #FFFFFF;
}

.map_box {
  border: 3px solid #ddd;
  border-radius: 12px;
}

.boxAddress {
  position: absolute;
  top: 2px;
  left: 10.1%;
  /* width: 130px; */
  height: 33px;
  line-height: 33px;
  font-size: 16px;
  color: #fff;
  background: #000;
  opacity: 0.58;
  z-index: 9999;
  border-radius: 12px 0 12px 0;
  padding: 0 5px;
  cursor: pointer;
}

.boxAddress .line {
  background: #fff;
  width: 2px;
  height: 18px;
  display: inline-block;
  vertical-align: middle;
  margin: 0 5px;
  margin-top: -1px;
}

.boxAddress .active {
  color: #0177CA;
}

@media screen and (min-width: 1920px) {
  .timeLine_box .line {
    height: 95%;
  }
}