.history {
  padding: 85px 0 190px;
}

.title {
  padding-bottom: 60px;
  border-bottom: 2px solid #D9D9D9;
  line-height: 1;
  font-weight: 500;
}

.summary {
  color: #898989;
  line-height: 2;
  margin-top: 41px;
  width: 67%;
}

.phase {
  font-weight: 500;
}

.time {
  font-weight: bold;
  color: #2B69BF;
}

.year {
  font-weight: 500;
  width: 90px;
  word-break: keep-all;
}
.des{
    width: calc(100% - 90px);
}
.top {
  height: 90px;
}

li {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: baseline;
      -ms-flex-align: baseline;
          align-items: baseline;
}
li:nth-child(n+2) {
  margin-top: 6px;
}

.empty {
  height: 94px;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
}
.empty:after {
  content: "";
  display: block;
  width: 4px;
  height: 24px;
  background: #2B69BF;
}

.swiper-slide {
  padding-left: 85px;
}

.swiper::after {
  content: "";
  display: block;
  position: absolute;
  top: 137px;
  left: 0;
  width: 100%;
  height: 1px;
  background: #E2E2E2;
}

.sw {
  margin-top: 100px;
  position: relative;
}

.btn {
  z-index: 2;
  position: absolute;
  top: 115px;
  opacity: 1 !important;
}

.btn_prev {
  left: 0;
}

.btn_next {
  right: 0;
}

@media screen and (max-width: 1600px) {
  .title {
    padding-bottom: 30px;
  }
  .history {
    padding: 55px 0 115px;
  }
  .summary {
    margin-top: 25px;
  }
  .sw {
    margin-top: 6.94%;
  }
  .top {
    height: 70px;
  }
  .btn {
    top: 95px;
  }
  .swiper::after {
    top: 117px;
  }
  .swiper-slide {
    padding-left: 70px;
  }
  .year {
    margin-right: 15px;
  }
}
@media screen and (max-width: 900px) {
  .title {
    padding-bottom: 20px;
  }
}
@media screen and (max-width: 768px) {
  .title {
    padding-bottom: 15px;
  }
}
@media screen and (max-width: 600px) {
  .history {
    padding: 40px 0;
  }
  .summary {
    width: 100%;
    margin-top: 20px;
  }
  .top {
    height: 55px;
  }
  .btn {
    top: 63px;
  }
  .swiper::after {
    top: 85px;
  }
  .empty {
    height: 64px;
  }
  .sw {
    margin-top: 20px;
  }
}