.yf_title {
  width: 1200px;
  margin: 0 auto;
  text-align: center;
  color: #a6a6a6;
  font-size: 30px;
  margin-top: 76px;
}

.yf_title h3 {
  font-size: 48px;
  color: #2e60ad;
}


.yf_ban {
  margin-top: 122px;
  width: 100%;
  position: relative;
}

.yf_ban img {
  height: 716px;
  width: 100%;
}

.banner-wrap {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 980px;
  color: #fff;
  font-size: 48px;
  text-align: center;
}

.banner-title {
  font-size: 48px;
}

.w {
  margin: 0 auto;
  width: 1200px;
}

.yf_on2 {
  margin-top: 55px;
}

.yf_on2_wrap {
  display: flex;
  justify-content: space-between;
  position: relative;
  flex-wrap: wrap;
}

.yf_on2_wrap span {
  position: absolute;
  width: 32px;
  height: 32px;
}

.bor-top {
  top: 0;
  right: 0;
  border-top: 4px solid #2e60ad;
  border-right: 4px solid #2e60ad;
}

.bor-bottom {
  border-bottom: 4px solid #2e60ad;
  border-right: 4px solid #2e60ad;
  bottom: 0;
  right: 0;
}

.big-img img {
  width: 330px;
  height: 330px;
  border-radius: 50%;
}

.small-img img {
  width: 112px;
  height: 112px;
  border-radius: 50%;
}

.yf_on2_left {
  display: flex;
  flex-wrap: wrap;
}

.left-55 {
  position: relative;
  left: 55px;
  margin: 10px 0;
}

.right-55 {
  position: relative;
  right: 55px;
  margin: 10px 0;
}

.yf_item {
  width: 486px;
}

.small_title {
  font-size: 30px;
  color: #666;
  margin-bottom: 14px;
}

.yf_item h6 {
  font-size: 30px;
  font-weight: 550;
  position: relative;
  margin: 0;
}

.yf_item h6::after {
  position: absolute;
  content: '';
  width: 96px;
  height: 2px;
  left: 8px;
  bottom: -20px;
  background-color: #2e60ad;
}

.yf_item_desc {
  margin-top: 46px;
  font-size: 18px;
  line-height: 30px;
}

.yf_on2_right {
  box-sizing: border-box;
  margin-right: 75px;
}

.yf_on3,
.yf_on4,
.yf_on5 {
  margin-top: 60px;
}

.yf_on3 .bor-top,
.yf_on5 .bor-top {
  top: 0;
  left: 0;
  border-top: 4px solid #2e60ad;
  border-left: 4px solid #2e60ad;
  border-right: none;
}

.yf_on4 .big-img {
  margin-right: 50px;
}

.yf_on3 .bor-bottom,
.yf_on5 .bor-bottom {
  border-bottom: 4px solid #2e60ad;
  border-left: 4px solid #2e60ad;
  bottom: 0;
  left: 0;
  border-right: none;
}

.yf_on3 .yf_on2_right {
  margin-left: 75px;
  margin-right: 0;
}

.yf_on5 {
  margin-bottom: 150px;
}

.yf_on5 .yf_on2_left {
  margin-left: 75px;
}

.yf_on5 .big-img img {
  width: 100%;
  border-radius: 0;
}


/* 自适应 */
@media screen and (max-width: 1000px) {
  .yf_ban{
    margin-top: 0;
  }

  .yf_ban img{
    height: 100%;
  }

  .banner-title,.banner-desc{
    font-size: 26px;
    width: 300px;
    margin: 0 auto;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
  }

  .yf_title h3{
    font-size: 30px;
  }

  .yf_title{
    font-size: 25px;
    width: 100%;
  }

  .w{
    width: 100%;
  }

  .big-img img{
    width: 94%;
    height: 100%;
  }

  .yf_on2_left div:nth-child(2),.yf_on2_left div:nth-child(1){
    display: flex;
    align-items: center;
    justify-content: space-around;
    width: 100%;
    margin: 10px 0;
  }

  .left-55{
    left: 0;
  }

  .bor-top,.bor-bottom{
    display: none;
  }

  .yf_on2_right{
    margin-right: 0;
    padding: 0 20px;
    box-sizing: border-box;
    margin-top: 30px;
  }

  .small_title{
    font-size: 25px;
  }

  .yf_item h6{
    font-size: 22px;
  }

  .yf_on3 .yf_on2_right{
    margin-left: 0;
  }

  .right-55{
    right: 0;
  }

  .yf_on5{
    padding-bottom: 50px;
  }
}