.container-header {
  overflow: hidden;
  display: flex;
  justify-content: center;
  position: relative;
  width: 100%;
  height: 600px;
  padding-top: 160px;
}

.container-header > img {
  width: 1920px;
  height: 600px;
}

.container-header-box {
  display: flex;
  flex-direction: column;
  position: relative;
  z-index: 2;
  width: 1500px;
}

.container-header-box > span:nth-child(1) {
  height: 100px;
  line-height: 100px;
  font-size: 80px;
  font-weight: 600;
  color: #333333;
}

.container-header-box > span:nth-child(2) {
  height: 50px;
  line-height: 50px;
  font-size: 36px;
  font-family: PingFang SC-Regular, PingFang SC;
  font-weight: 400;
  color: #888888;
}

.container-body {
  display: flex;
  justify-content: center;
  width: 100%;
  padding: 60px 0 40px 0;
}

.container-body-box {
  display: flex;
  justify-content: space-between;
  position: relative;
  width: 1500px;
}

.container-left-list {
  display: flex;
  flex-direction: column;
  width: 100px;
}

.container-left-list > li {
  display: flex;
  width: 100px;
  height: 42px;
}

.container-left-item {
  display: flex;
  width: 100px;
  height: 42px;
}

.container-left-item-year {
  position: relative;
  width: 100px;
  height: 42px;
  line-height: 42px;
  font-size: 14px;
  font-weight: normal;
  color: #666666;
  background: #ffffff;
  border-bottom: 1px solid rgba(136, 136, 136, 0.3);
  text-align: center;
  cursor: pointer;
}
.container-left-item-year > span {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  /* IE */
  -ms-transform: translateY(-50%);
  /* 火狐 */
  -moz-transform: translateY(-50%);
  /* 谷歌 */
  -webkit-transform: translateY(-50%);
  /* 欧朋 */
  -o-transform: translateY(-50%);
  right: -10px;
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
}

.container-left-item-year:hover {
  color: #fff !important;
  background: #296bcf !important;
}

.container-left-item-year:hover > span {
  border-left: 5px solid #296bcf !important;
}

.container-right-list {
  display: flex;
  flex-direction: column;
  width: calc(100% - 220px);
}

.container-right-item-year {
  display: flex;
  justify-content: space-between;
  position: relative;
  width: 100%;
  min-height: 105px;
}

.container-right-item-month {
  display: flex;
  justify-content: space-between;
  position: relative;
  width: 100%;
  min-height: 80px;
}

.container-right-item-left {
  position: relative;
  width: 100px;
  height: 100%;
}

.year-item-border {
  top: 0;
  width: 4px;
  height: 100%;
  background-color: #dbdbdb;
}

.year-item-circle {
  z-index: 2;
  width: 25px;
  height: 25px;
  border-radius: 50%;
  background-color: #296bcf;
}

.year-item-circle::before {
  content: "";
  position: absolute;
  top: 5px;
  left: 5px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background-color: #fff;
}

.month-item-border {
  top: 0;
  width: 4px;
  height: 100%;
  background-color: #dbdbdb;
}

.month-item-circle {
  z-index: 2;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background-color: #dbdbdb;
}

.month-item-month {
  font-size: 18px;
  font-weight: normal;
  color: #666666;
}

.container-right-item-right {
  display: flex;
  align-items: center;
  width: calc(100% - 100px);
  min-height: 100%;
}

.year-item-text {
  font-size: 36px;
  font-weight: normal;
  color: #296bcf;
}

.month-item-text {
  display: flex;
  position: relative;
  width: 100%;
  min-height: 80px;
  padding: 15px 0;
}

.month-item-text::before {
  content: "";
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  /* IE */
  -ms-transform: translateY(-50%);
  /* 火狐 */
  -moz-transform: translateY(-50%);
  /* 谷歌 */
  -webkit-transform: translateY(-50%);
  /* 欧朋 */
  -o-transform: translateY(-50%);
  left: -20px;
  border-top: 10px solid transparent;
  border-bottom: 10px solid transparent;
  border-left: 10px solid transparent;
  border-right: 10px solid #fff;
}

.month-item-text > span {
  position: relative;
  width: 100%;
  min-height: 60px;
  line-height: 40px;
  padding: 10px 30px;
  font-size: 18px;
  color: #666;
  background-color: #fff;
}