.dev_history * {
    box-sizing: border-box;
    font-family: 'Microsoft YaHei', '微软雅黑';
}

.dev_history {
    max-width: 1200px;
    margin: 0 auto;
}

.dev_history .swiper-container {
    padding-bottom: 20px;
}

.dev_history .dev_history_swiper_thumbs {
    padding-top: 100px;
}

.dev_history .swiper-container img {
    max-width: 100%;
    display: block;
    border: none;
    height: auto;
    object-fit: cover;
}

.dev_history .swiper-button-next,
.dev_history .swiper-button-prev {
    width: 26px;
    height: 30px;
    display: flex;
    justify-content: center;
    align-items: center;
    background: transparent;
}

.dev_history .swiper-button-next {
    right: 0;
}

.dev_history .swiper-button-prev {
    left: 0;
}

.dev_history .swiper-button-next svg {
    transform: rotate(180deg);
}

.dev_history_swiper_top .dev_img {
    width: 58%;
}

.dev_history_swiper_top .dev_img img {
    width: 100%;
    height: 100%;
}

.dev_history_swiper_top .dev_content {
    flex: 1;
}

.dev_history_swiper_top .swiper-slide {
    width: 96% !important;
    height: 400px;
    margin: 0 2%;
    display: flex;
    background: #fff;
    box-shadow: 5px 5px 10px #a1a0a0;
    overflow: hidden;
}

.dev_history_swiper_top .swiper-slide .dev_content {
    padding: 40px 70px;
}

.dev_history_swiper_top .swiper-slide .dev_content .dev_year {
    font-size: 36px;
    color: #009FB9;
    margin-bottom: 20px;
}

.dev_history_swiper_top .swiper-slide .dev_content .dev_des {
    font-size: 16px;
    color: #333333;
}

.dev_history_swiper_thumbs .swiper-slide {
    width: 16%;
    background: url("/base/plugins/html-blocks/pc/companyIntro/images/dev_dotbg.png") no-repeat left top;
}

.dev_history_swiper_thumbs .swiper-slide .year_num {
    font-size: 16px;
    color: #000000;
    padding-top: 100px;
    width: 100%;
    display: inline-block;
    vertical-align: top;
    position: relative;
}

.dev_history_swiper_thumbs .swiper-slide .year_num::after {
    content: "";
    position: absolute;
    width: 16px;
    height: 16px;
    background: #009FB9;
    border-radius: 50%;
    left: 10px;
    top: 28px;
}

.dev_history_swiper_thumbs .swiper-slide-active .year_num {
    background: url(/base/plugins/html-blocks/pc/companyIntro/images/dev_icon.png) no-repeat top 20px left 4px, url(/base/plugins/html-blocks/pc/companyIntro/images/dev_car.png) no-repeat top 60px left 5px;
}