.center {
  width: 1200px;
  margin: 0 auto;
}
@media screen and (max-width: 1200px) {
  .center {
    width: 100%;
  }
}

.i_box3 {
  width: 100%;
  padding: 50px 0;
}

.i_box3 .box {
  width: 100%;
  margin-top: 20px;
}

.box3_list {
  width: 100%;
}

.box3_list ul li {
  width: 100%;
  float: left;
  margin-top: 30px;
}

.box3_list ul li .fl {
  width: 50%;
  float: right;
}

.box3_list ul li .fl img {
  display: block;
  width: 85%;
  max-width: 100%;
  float: right;
}

.box3_list ul li .fr {
  width: 50%;
  float: left;
}

.box3_list ul li .fr .f_text {
  margin-bottom: 40px;
}

.box3_list ul li .fr .f_text .fr_tit {
  width: 100%;
  padding-left: 110px;
  min-height: 101px;
  background: url(../images/1.jpg) no-repeat left top;
  margin-bottom: 15px;
}

.box3_list ul li .fr .f_text .fr_tit span {
  color: #1e5db0;
  font-size: 36px;
  font-weight: bold;
  line-height: 40px;
  display: block;
  text-align: left;
  padding-top: 15px;
}

.box3_list ul li .fr .f_text .fr_tit i {
  line-height: 40px;
  font-size: 18px;
  font-weight: 100;
  text-transform: uppercase;
  color: #999;
  font-family: Arial;
  font-style: normal;
  display: block;
}

.box3_list ul li .fr .f_text p {
  display: block;
  font-size: 16px;
  margin-left: 40px;
  text-align: left;
  color: #666;
  line-height: 30px;
  padding-left: 40px;
  background: url(../images/f.jpg) no-repeat left 13px;
}

.box3_list ul li.on .fl {
  float: left;
}

.box3_list ul li.on .fl img {
  float: left;
}

.box3_list ul li.on .fr {
  float: right;
}

.box3_list ul li:nth-of-type(1) .fr .f_text:nth-of-type(2) .fr_tit {
  background: url(../images/2.jpg) no-repeat left top;
}

.box3_list ul li:nth-of-type(2) .fr .f_text:nth-of-type(1) .fr_tit {
  background: url(../images/3.jpg) no-repeat left top;
}

.box3_list ul li:nth-of-type(2) .fr .f_text:nth-of-type(2) .fr_tit {
  background: url(../images/4.jpg) no-repeat left top;
}
@media screen and (max-width: 768px) {
  .i_box3 {
    padding-top: 0;
  }
  .i_box3 .i_pic img {
    width: 100%;
    height: 90px;
    -o-object-fit: cover;
    object-fit: cover;
  }
  .box3_list {
    padding: 0 2%;
  }
  .box3_list ul li {
    margin-top: 0;
  }
  .box3_list ul li .fl {
    width: 100%;
    display: none;
  }
  .box3_list ul li .fr {
    width: 100%;
  }
  }
  @media screen and (max-width: 450px) {
  .box3_list ul li .fr {
    width: 100%;
  }
  .box3_list ul li .fr .f_text {
    margin-bottom: .15rem;
  }
  .box3_list ul li .fr .f_text .fr_tit {
    height: 80px;
    min-height: auto;
    background: url(../images/1.jpg) no-repeat left top;
    background-size: auto 100%;
    padding-left: 88px;
  }
  .box3_list ul li .fr .f_text .fr_tit span {
    font-size: 24px;
    padding-top: 15px;
    line-height: 32px;
  }
  .box3_list ul li .fr .f_text .fr_tit i {
    font-size: .11rem;
    line-height: 28px;
  }
  .box3_list ul li .fr .f_text p {
    padding-left: 30px;
    font-size: .115rem;
    line-height: .2rem;
    margin-top: .06rem;
    margin-left: .2rem;
  }
  .box3_list ul li:nth-of-type(1) .fr .f_text:nth-of-type(2) .fr_tit {
    height: 80px;
    min-height: auto;
    background: url(../images/2.jpg) no-repeat left top;
    background-size: auto 100%;
    padding-left: 88px;
  }
  .box3_list ul li:nth-of-type(2) .fr .f_text:nth-of-type(1) .fr_tit {
    height: 80px;
    min-height: auto;
    background: url(../images/3.jpg) no-repeat left top;
    background-size: auto 100%;
    padding-left: 88px;
  }
  .box3_list ul li:nth-of-type(2) .fr .f_text:nth-of-type(2) .fr_tit {
    height: 80px;
    min-height: auto;
    background: url(../images/4.jpg) no-repeat left top;
    background-size: auto 100%;
    padding-left: 88px;
  }
  }