/* usart hmi及B站宣传海报 */
.main_b2_div {
    height: 300px;
    margin: 16px 16px;
}
.main_b2_div div:first-child {
    width: 65%;
    height: 100%;
    float: left;
}
.main_b2_div div:last-child {
    width: calc(35% - 16px);
    height: 100%;
    float: left;
    margin-left: 16px;
}
.main_b2_div div img {
    width: 100%;
    height: 100%;
}

/* 公司资质海报 */
.main_b3_div {
    height: 464px;
    margin-bottom: 16px;
}

/* 新闻动态开始 */
.main_news_div {
    height: 453px;
    width: 82%;
    margin: 0 auto;
}
.main_news_div h4 {
    font-size: 16px;
}

.main_news_div>div:first-child {
    width: 59%;
    height: 100%;
    float: left;
}
.main_news_div>div:first-child img {
    width: 100%;
    height: 100%;
}

.main_news_div>div:last-child {
    width: calc(41% - 92px);
    height: 100%;
    float: left;
    padding-top: 11px;
    margin-left: 92px;
}

.main_news_div .news_box {
    border-bottom: 1px solid #000;
    height: 60px;
    cursor: pointer;
}

.main_news_div .news_box .number {
    float: left;
    margin-top: 30px;
}

.main_news_div .news_box .title {
    float: left;
    margin-left: 42px;
    margin-top: 30px;
}

.main_news_div .news_box .subtitle {
    width: 400px;
    float: left;
    font-size: 12px;
    margin-left: 61px;
    margin-top: 8px;
    color: #2c2c2c;
}

.main_news_div .more {
    margin-left: 61px;
    margin-top: 20px;
}
/* 新闻动态结束 */

/* 产品应用海报 */
.main_B4_div {
    height: 800px;
    margin: 16px auto;
    position: relative;
}
.mc_pos_cover{
    width: 100%;
    height: 100%;
    position: absolute;
    left: 0;
    top: 0;
    z-index: 10;
}

.mc_a1t_a{
    display: block;
    position: relative;
    color: #0052d9;
    z-index: 30;
}
 

.mc_a1t_li .mc_a1t_xl::before {
    width: 100%;
    transition: all .4s cubic-bezier(.34, .44, .41, 1.12);
}

.mc_a1t_li .mc_a1t_xl span {
    opacity: 1;
    transition: all .36s .4s;
}

.mc_a1t_li {
    position: absolute;
    z-index: 20;
}

.mc_a1t_dian {
    position: relative;
    animation: bordershow 3s infinite;
}

.mc_a1t_dian {
    display: block;
    width: 12px;
    height: 12px;
    background: #fff;
    border: 7px solid #0052d9;
    border-radius: 50%;
}

.mc_a1t_dian::before {
    content: '';
    display: block;
    position: absolute;
    left: 50%;
    top: 50%;
    z-index: -1;
    transform: translate(-50%, -50%);
    width: 25px;
    height: 25px;
    border-radius: 50%;
    background: rgba(0, 82, 217, 0.2);
}

.mc_a1t_dian::after {
    content: '';
    display: block;
    position: absolute;
    left: 50%;
    top: 50%;
    z-index: -1;
    transform: translate(-50%, -50%);
    width: 25px;
    height: 25px;
    border-radius: 50%;
    background: rgba(0, 82, 217, 0.2);
}

.mc_a1t_dian::before {
    animation: boderM 3s .75s infinite;
}

.mc_a1t_dian::after {
    animation: boderM 3s infinite;
}

.mc_a1t_xl span {
    opacity: 1;
}
.mc_a1t_xl {
    text-align: center;
    line-height: 54px;
    height: 54px;
    font-size: 10px;
    position: absolute;
    left: 42px;
    top: 50%;
    z-index: 1;
    transform: translateY(-50%);
    white-space: nowrap;
    padding: 0 43px;
    pointer-events: all;
}

.mc_a1t_xl:hover::before{
    border: 1px solid white;
}

.mc_a1t_xl::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    z-index: -1;
    width: 0;
    height: 100%;
    background: rgba(0, 82, 217, .77);
    border-radius: 30px;
}
.mc_a1t_xl::after {
    content: "";
    position: absolute;
    right: 100%;
    top: 0;
    width: 42px;
    height: 100%;
}
.mc_a1t_title {
    margin: 0 auto;
    text-align: center;
    color: #fff;
    font-size: 16px;
    /* margin-right: 45px; */
    vertical-align: middle;
}

/* .mc_a1t_li:hover {
    z-index: 20;
}

.mc_a1t_li:hover .mc_a1t_xl {
    pointer-events: all;
}

.mc_a1t_li:hover .mc_a1t_xl::before {
    width: 100%;
    transition: all .4s cubic-bezier(.34, .44, .41, 1.12);
}

.mc_a1t_li:hover .mc_a1t_xl span {
    opacity: 1;
    transition: all .36s .4s;
} */