.banner {
  margin-top: 80px;
  width: 100%;
  height: 500px;
  background: url('/images/introduce/development-history/1.png') no-repeat;
  background-size: cover;
  -webkit-background-size: cover;
  -o-background-size: cover;
  background-position: left 0;
}
@media screen and (max-width: 1024px) {
  .banner {
    margin-top: 70px;
  }
}
@media screen and (max-width: 768px) {
  .banner {
    height: 400px;
  }
}
@media screen and (max-width: 540px) {
  .banner {
    height: 300px;
  }
}
@media screen and (max-width: 414px) {
  .banner {
    height: 250px;
  }
}
@media screen and (max-width: 375px) {
  .banner {
    height: 200px;
  }
}
.title {
  width: 1200px;
  margin: 0 auto;
}
.title h2 {
  font-size: 26px;
  font-weight: 600;
  letter-spacing: 2px;
  margin-bottom: 20px;
  margin-top: 20px;
}
.title h3 {
  font-size: 16px;
  letter-spacing: 2px;
  line-height: 30px;
  font-weight: normal;
}
.yearLine {
  width: 1200px;
  margin: 0 auto;
}
.yearLine ul li {
  position: relative;
  width: 100%;
  height: 280px;
}
.yearLine ul li .txt-box {
  position: absolute;
  top: 50%;
  left: 0;
  transform: translateY(-50%);
  width: 400px;
  height: auto;
  font-size: 16px;
  line-height: 26px;
}
.yearLine ul li:nth-child(even) .txt-box {
  left: auto;
  right: 0;
}
.yearLine ul li::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 25px;
  height: 25px;
  border-radius: 50%;
  background-color: #C7161E;
}
.yearLine ul li::after {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  height: 100%;
  background-color: #C7161E;
  z-index: -9999;
}
.yearLine ul li .year {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translateY(-50%) translateX(-50%);
  width: 250px;
  height: 65px;
  font-size: 36px;
  color: #C7161E;
  line-height: 65px;
  text-align: center;
  border: 1px solid #C7161E;
  border-radius: 65px;
  background-color: #fff;
}
@media screen and (max-width: 1200px) {
  .title {
    width: 530px;
    margin-bottom: 20px;
  }
  .title h3 {
    line-height: 26px;
  }
  .yearLine {
    width: 500px;
  }
  .yearLine ul li {
    height: 200px;
  }
  .yearLine ul li .txt-box {
    left: auto;
    right: 0;
  }
  .yearLine ul li .year {
    left: 0;
    width: 100px;
    height: 40px;
    font-size: 18px;
    font-weight: bold;
    line-height: 40px;
    border-radius: 40px;
  }
  .yearLine ul li::before {
    left: 0;
    width: 20px;
    height: 20px;
  }
  .yearLine ul li::after {
    left: 0;
  }
}
@media screen and (max-width: 600px) {
  .title {
    width: calc(100% - 40px);
  }
  .title h2 {
    font-size: 20px;
  }
  .title h3 {
    font-size: 14px;
    line-height: 23px;
  }
  .yearLine {
    width: 100%;
  }
  .yearLine ul li {
    height: 180px;
  }
  .yearLine ul li .txt-box {
    width: calc(100% - 80px);
    right: auto;
    left: 60px;
    font-size: 14px;
    line-height: 23px;
  }
  .yearLine ul li:nth-child(even) .txt-box {
    left: 60px;
    right: auto;
  }
  .yearLine ul li .year {
    left: 25px;
    width: 60px;
    height: 30px;
    border-radius: 30px;
    font-size: 16px;
    line-height: 30px;
    border: none;
  }
  .yearLine ul li::before {
    left: 25px;
    width: 15px;
    height: 15px;
  }
  .yearLine ul li::after {
    left: 25px;
  }
}
@media screen and (max-width: 380px) {
  .yearLine ul li {
    height: 200px;
  }
}
@media screen and (max-width: 350px) {
  .yearLine ul li {
    height: 220px;
  }
}