.history {
    width: 1920px;
    margin-left: auto;
    margin-right: auto;
    height: 768px;
    background: #0177ff url("../images/history_bg.jpg") center no-repeat;
    background-size: cover;
}

.history_con_wrap {
    width: 1200px;
    margin-left: auto;
    margin-right: auto;
    height: 100%;
    box-sizing: border-box;
    padding: 0 45px 0 290px;
    color: #fff;
    display: flex;
    flex-direction: column;
}

.history_t {
    font-size: 36px;
    font-weight: 700;
    height: 100px;
    box-sizing: border-box;
    padding-top: 40px;
}

.history_con {
    box-sizing: border-box;
    flex: 1;
    display: flex;
}

.history_navigation {
    width: 150px;
    box-sizing: border-box;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 45px 0 30px;
    position: relative;
}

.history_navigation::after {
    width: 4px;
    height: 100%;
    content: "";
    position: absolute;
    right: 85px;
    top: 0;
    background: #0eacff;
    border-radius: 2px 2px 0 0;
}

.history_navigation_item {
    position: relative;
    width: 100%;
    height: 31px;
    box-sizing: border-box;
}

.history_navigation_item:first-child .history_circle::after {
    display: inline-block;
    content: "";
    width: 90px;
    height: 4px;
    background: linear-gradient(to right, rgba(14, 172, 255, 1), rgba(14, 172, 255, 0));
    position: absolute;
    left: 14px;
    margin: auto;
    top: 0;
    bottom: 0;
}

.history_year {
    height: 100%;
    font-size: 18px;
    color: #0eacff;
    font-weight: 500;
    cursor: pointer;
    position: absolute;
    margin: auto;
    top: 0;
    bottom: 0;
    display: flex;
    align-items: center;
}
.history_navigation_item:nth-last-of-type(even) .history_year{
    right: 26px;
}
.history_year_active {
    color: #fff;
}

.history_circle {
    width: 16px;
    height: 16px;
    background: url("../images/history_circle.png") center no-repeat;
    background-size: 100%;
    position: absolute;
    margin: auto;
    top: 0;
    bottom: 0;
    right: 79px;
    z-index: 2;
    cursor: pointer;
}

.history_circle_active {
    animation: history_circle_shanshuo 2s linear infinite;
}

@keyframes history_circle_shanshuo {

    0% {
        transform: scale(1.6);
    }

    50% {
        transform: scale(1.2);
    }

    100% {
        transform: scale(1.6);
    }
}

.history_detail {
    flex: 1;
    height: 590px;
    box-sizing: border-box;

}

.swiper-history {
    height: 100%
}

.history_detail_year {
    font-size: 40px;
    font-weight: 700;
}

.history_line {
    width: 90px;
    height: 4px;
    background: linear-gradient(to right, rgba(14, 172, 255, 1), rgba(14, 172, 255, 0));
    margin-left: -70px;
}
.history_detail_item{
    height: 100%;
    width: 100%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-sizing: border-box;
    padding-top: 10px;
}
.history_detail_desc {
    font-size: 16px;
    line-height: 1.6;
    text-align: justify;
    position: relative;
    box-sizing: border-box;
    padding: 0px 38px;
}

.history_detail_desc::before {
    content: "";
    display: inline-block;
    width: 38px;
    height: 24px;
    background: url("../images/history_arrow.png") center left no-repeat;
    position: absolute;
    left: 0;
    top: 14px;
}
.history_detail_desc p{
    margin-top: 10px;
}
.history_detail_img {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    box-sizing: border-box;
    padding: 30px 20px;
    overflow: hidden;
}

.history_detail_img img {
    max-width: 90%;
    max-height: 100%;
}