body{
  /* font-family: PingFangSC-Semibold, PingFang SC; */
  font-size: 24px;
  margin: 0;
  padding: 0;
  background: #F2F9FF;
  position: relative;
}

.content{
background-color: #fff;
width: 1200px;
/* min-height: 778px; */
margin: auto;
}


.content .doc-content{
padding: 44px 32px;
font-size: 16px;
font-weight: 300;
color: #333333;
line-height: 28px;
}

.doc-content-title{
  width: 739px;
  font-size: 43px;
  /* font-family: PingFangSC-Semibold, PingFang SC; */
  font-weight: 600;
  color: #333333;
  line-height: 61px;
  margin: auto;
  text-align: center;
  margin-top: 71px;
  margin-bottom: 79px;
}

.mission-years{
  /* position: absolute;
  left: 0; */
  display: 'none';
width: 100%;
height: 930px;
padding-top: 75px;
/* background-image: url('../images/years-back.png'); */
background-repeat: no-repeat;
}

.mission-years .years-title,.months-content{
  width: 1200px;
  margin: auto;
  box-sizing: border-box;
}

.mission-years .years-title{
  margin-bottom: 61px;
  display: flex;
  align-items: center;
  justify-content: space-around;
}

.mission-years .years-title .iconfont{
  cursor: pointer;
}

.mission-years .years-title .years{
  display: flex;
  width: 1026px;
  overflow: hidden;
  font-size: 42px;
  font-weight: 600;
  color: #858585;
  line-height: 59px;
}
.mission-years .years-title .years div{
  margin-right: 102px;
  cursor: pointer;
  box-sizing: border-box;
  white-space: nowrap;
  transition: transform 1s;
}

.mission-years .years-title .years div:last-child{
  margin-right: 0;
}

.mission-years .years-title .years .selected{
  color: #437EE9;
}
.mission-years .years-title .years .year{
  font-size: 19px;
  font-weight: 600;
  color: #C1C1C1;
  line-height: 26px;
  margin-left: 3px;
}
.mission-years .years-title .iconfont{
  font-size: 52px;
  color: #858585;
}

.mission-years .years-title .noused{
  color: rgba(133, 133, 133, 0.21);
}

.mission-years .years-title .right{
  transform: scaleX(-1);
}
.mission-years .months-content{
  height: 750px;
  overflow-y:auto;
  display: none;
}
.mission-years .months-content .month-content{
  display: flex;
  margin-left: 50px;
}

.mission-years .months-content .month-content .month{
  font-size: 18px;
  font-weight: 600;
  color: #437EE9;
  line-height: 18px;
  display: flex;
  margin-right: 31px;
  position: relative;
  top: 22px;
}

.mission-years .months-content .month-content .month span{
  position: relative;
  top: 9px;
  width: 38px;
  white-space: nowrap;
}

.mission-years .months-content .month-content .month::before{
  content: '';
  display: block;
  width: 36px;
  height: 36px;
  background: #437EE9;
  order: 1;
  z-index: 10;
  margin-left: 17px;
}

.mission-years .months-content .month-content .month::after{
  content: '';
  display: block;
  height: 100%;
  width: 1px;
  position: relative;
  order: 2;
  background-color: #C1C1C1;
  right: 18px;
}

.mission-years .months-content .month-content .month-content-items{
  display: flex;
  flex-wrap: wrap;
}

.mission-years .months-content .month-content .month-content-items .item{
  background-color: #fff;
  padding: 28px 27px;
  margin-right: 51px;
  margin-bottom: 44px;
  font-size: 18px;
  font-weight: 400;
  color: #333333;
  width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}