.history_bg{
    width: 100%;
    min-height: 500px;
    /* background: url(../images/about_24.jpg) no-repeat; */
    background-size: cover;
    padding: 10px 0 10px;
    overflow: hidden;
}
.history_bg .about_tit{
    /* margin-bottom: 0.68rem; */
    margin-bottom: 10px;
}
.history_box{
    width: 100%;
    position: relative;
}
.history_line{
    width: 100%;
    height: 200px;
    background: url(about_25.png) no-repeat center top;
    background-size: 100% 100%;
    position: absolute;
    top: 200px;
    /* top: 1.4rem; */
    left: 0;
    right: 0;
}
.history{
    position: relative;
    z-index: 2;
    padding-top: 10px;
}

.history .swiper-slide:nth-child(4n+1) .his_con{
    margin-top: 280px;
}
.history .swiper-slide:nth-child(4n+1) .his_right{
    padding-top: 20px;
}
.history .swiper-slide:nth-child(4n+2) .his_con{
    margin-top: 20px;
    min-height: 180px;
}
.history .swiper-slide:nth-child(4n+3) .his_con{
    margin-top: 320px;
}
.history .swiper-slide:nth-child(4n+3) .his_right{
    padding-top: 100px;
}
.history .swiper-slide:nth-child(4n+4) .his_con{
    min-height: 200px;
}
/* .history.swiper-free-mode > .swiper-wrapper {
  -webkit-transition-timing-function: linear;
  -moz-transition-timing-function: linear;
  -ms-transition-timing-function: linear;
  -o-transition-timing-function: linear;
  transition-timing-function: linear;
} */
.his_con{
    padding-left: 60px;
    min-height: 100px;
    position: relative;
}
.his_line{
    margin: 0 auto;
    width: 0.01rem;
    height: 90%;
    background: #b5b5b5;
    position: absolute;
    top: 0.18rem;
    left: 1.2rem;
}
.his_line_t01{
    margin: 0 auto;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(0, 75, 159, 0.2);
    -webkit-animation: scaleAnimate 2s linear infinite;
    opacity: 0;
    position: absolute;
    top: -15px;
    left: calc(50% - 20px);
    z-index: 1;
}
.his_line_t02{
    margin: 0 auto;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #003dd8;
    position: absolute;
    top: 0;
    /*left: 15px;*/
    left: 50%;
    transform: translateX(-45%);
    z-index: 2;
}
.his_line_b{
    margin: 0 auto;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: #b5b5b5;
    position: absolute;
    bottom: 0;
    /*left: 13px;*/
    left: 50%;
    transform: translateX(-45%);
    z-index: 2;
}
.his_right{
    padding: 0.18rem 0;
}
.his_right>span{
    color: #333;
    font-size: 28px;
    font-weight: bold;
    line-height: 40px;
    margin-bottom: 0.1rem;
    padding-right: 8px;
}
.his_right h1 span{
    font-size: 20px;
    font-family: "Techna-Sans";
    padding-right: 14px;
}
.his_right .txt{
    width: 400px;
    color: #333;
    font-size: 16px;
    line-height: 28px;
    /* text-align: justify; */
}

@keyframes scaleAnimate {
    0% {
        transform: scale(0) ;
        opacity: 0;
    }

    50% {
        transform: scale(0.5) ;
        opacity: 1;
    }

    100% {
        transform: scale(1);
        opacity: 0;
    }
}