@-webkit-keyframes animate_line{
    0%,to{
        transform:scale(1,1);
        transform-origin:50% 100%;
        opacity:1
    }
    20%{
        transform:scale(1,.01);
        transform-origin:50% 100%;
        opacity:1
    }
    30%{
        transform:scale(1,.01);
        transform-origin:50% 100%;
        opacity:0
    }
    31%{
        transform:scale(1,.01);
        transform-origin:50% 0;
        opacity:0
    }
    50%{
        transform:scale(1,1);
        transform-origin:50% 0;
        opacity:1
    }
}
@keyframes animate_line{
    0%,to{
        transform:scale(1,1);
        transform-origin:50% 100%;
        opacity:1
    }
    20%{
        transform:scale(1,.01);
        transform-origin:50% 100%;
        opacity:1
    }
    30%{
        transform:scale(1,.01);
        transform-origin:50% 100%;
        opacity:0
    }
    31%{
        transform:scale(1,.01);
        transform-origin:50% 0;
        opacity:0
    }
    50%{
        transform:scale(1,1);
        transform-origin:50% 0;
        opacity:1
    }
}
.about_megvii-banner-container{
    padding-top:160px;
    text-align:center;
    color:#fff;
    background-position:center;
    background-repeat:no-repeat;
    background-size:cover;
    background-color:#000
}
.about_megvii-banner-container>.title{
    font-size:32px;
    font-weight:600;
    line-height:60px;
    margin-bottom:24px
}
.about_megvii-banner-container>.desc{
    font-size:16px;
    line-height:28px;
    margin-bottom:48px
}
.about_megvii-banner-container .button{
    margin:0 auto 72px;
    display:flex;
    align-items:center;
    justify-content:center;
    cursor:pointer
}
.about_megvii-banner-container .button .icon{
    background-position:center;
    width:18px;
    height:18px;
    background-image:url(../../img/about_megvii/button_play.7141db62.png);
    display:inline-block;
    background-size:contain;
    margin-right:12px
}
.about_megvii-banner-container .slogan-container{
    display:flex;
    min-height:132px;
    justify-content:space-between
}
.about_megvii-banner-container .slogan-container .slogan-item{
    margin-right:25px;
    height:auto;
    background:rgba(14,87,162,.3);
    padding:22px 36px;
    flex:1;
    transition:all .3s linear;
    position:relative;
    top:0
}
.about_megvii-ability,.about_megvii-banner-container .slogan-container .slogan-item .title{
    position:relative
}
.about_megvii-banner-container .slogan-container .slogan-item .title:after,.about_megvii-banner-container .slogan-container .slogan-item .title:before{
    content:"";
    position:absolute;
    width:6px;
    height:17px;
    transform:skew(-10deg);
    background-color:#2590f2
}
.about_megvii-banner-container .slogan-container .slogan-item .title:before{
    top:-10px;
    left:-14px;
    opacity:0;
    transition:all .3s linear
}
.about_megvii-banner-container .slogan-container .slogan-item .title:after{
    top:10px;
    right:-14px;
    opacity:0;
    transition:all .3s linear
}
.about_megvii-banner-container .slogan-container .slogan-item:last-child{
    margin-right:0
}
.about_megvii-banner-container .slogan-container .slogan-item .title{
    font-size:20px;
    line-height:22px;
    margin-bottom:12px;
    display:inline
}
.about_megvii-banner-container .slogan-container .slogan-item .desc{
    margin-top:10px
}
.about_megvii-banner-container .slogan-container .slogan-item:first-child .desc{
    margin-top:12px
}
.about_megvii-banner-container .slogan-container .slogan-item:first-child,.about_megvii-banner-container .slogan-container .slogan-item:last-child{
    padding-top:36px
}
.about_megvii-banner-container .slogan-container .slogan-item .desc{
    font-size:16px;
    font-weight:700;
    color:#fff;
    line-height:28px
}
.about_megvii-brainpp .main{
    display:flex;
    justify-content:space-between;
    align-items:center;
    width:1160px
}
.about_megvii-brainpp .brainpp-img{
    width:700px;
    margin-right:4px;
    flex-shrink:0
}
.about_megvii-brainpp .content .title{
    font-size:32px;
    font-weight:bolder;
    color:#333;
    line-height:50px;
    margin-bottom:20px
}
.about_megvii-brainpp .content .desc{
    font-size:14px;
    color:#333;
    line-height:28px;
    margin-bottom:32px;
    text-align:left
}
.about_megvii-brainpp .content .desc p{
    margin-bottom:20px
}
.about_megvii-brainpp .content .button{
    margin-right:32px;
    justify-content:center;
    align-items:center
}
.about_megvii-brainpp .btns-container{
    display:flex
}
.about_megvii-ability>.desc,.about_megvii-ability>.title{
    position:absolute;
    top:48px;
    left:0;
    right:0;
    text-align:center;
    font-size:32px;
    font-weight:bolder;
    color:#000;
    line-height:60px;
    z-index:2
}
.about_megvii-ability>.desc{
    top:128px;
    font-size:16px;
    line-height:28px;
    font-weight:700
}
.about_megvii-ability .abilities-contianer{
    display:flex;
    justify-content:center
}
.about_megvii-ability .abilities-contianer .ability-item{
    flex:1;
    height:643px;
    position:relative;
    overflow:hidden;
    display:block;
    transition:all .5s linear
}
.about_megvii-ability .abilities-contianer .ability-item .bg{
    height:100%;
    background-position:center;
    background-size:cover;
    background-repeat:no-repeat;
    transition:all .3s
}
.about_megvii-ability .abilities-contianer .ability-item .content{
    position:absolute;
    width:100%;
    top:200px;
    padding:40px 50px;
    text-align:center;
    transition:all .3s
}
.about_megvii-ability .abilities-contianer .ability-item .content .title{
    font-size:24px;
    font-weight:bolder;
    color:#000;
    line-height:40px;
    margin-bottom:16px
}
.about_megvii-ability .abilities-contianer .ability-item .content .desc{
   
    font-size:14px;
    color:#000;
    font-weight: bold;
    line-height:28px;
    margin-bottom:16px;
    text-align:left;
    opacity:0;
    transition:all .3s;
    display:-webkit-box;
    /* overflow:hidden; */
    white-space:normal;
    text-overflow:ellipsis;
    word-wrap:break-word;
    -webkit-line-clamp:4;
    -webkit-box-orient:vertical
}
.about_megvii-ability .abilities-contianer .ability-item .content .learn-more{
    font-size:14px;
    font-weight:bolder;
    color:#2590f2;
    line-height:28px
}
.about_megvii-declaration{
    background-position:center;
    background-repeat:no-repeat;
    background-size:cover;
    padding-bottom:147px;
    position:relative
}
.about_megvii-declaration .goose-img{
    background-position:center;
    background-repeat:no-repeat;
    background-image:url(../../img/about_megvii/development_AI_goose.59f08e13.png);
    background-size:contain;
    position:absolute;
    right:100px;
    bottom:50px;
    width:540px;
    height:500px
}
.about_megvii-declaration .content{
    margin-top:80px;
    width:671px;
    font-size:14px;
    font-weight:700;
    color:#333;
    line-height:24px
}
.about_megvii-declaration .content p{
    margin-bottom:24px
}
.about_megvii-history{
    padding-bottom:100px
}
.about_megvii-history .card-title{
    color:#fff;
    z-index:1;
    position:relative
}
.about_megvii-history .swiper-slide .years{
    display:flex;
    justify-content:space-between;
    align-items:center;
    margin-top:55px;
    padding:0 46px
}
.about_megvii-history .swiper-slide .years span{
    font-size:60px;
    font-weight:bolder;
    color:rgba(255,255,255,.5);
    line-height:84px;
    flex:1;
    cursor:pointer
}
.about_megvii-history .swiper-pagination .swiper-pagination-bullet span.end span,.about_megvii-history .swiper-slide .years span.end span{
    display:inline-block;
    width:10px;
    height:10px;
    background-color:rgba(255,255,255,.5);
    border-radius:100%;
    position:relative;
    top:-12px
}
.about_megvii-history .swiper-slide .years span.end span:after,.about_megvii-history .swiper-slide .years span.end span:before{
    content:"";
    position:absolute;
    width:10px;
    height:10px;
    background-color:rgba(255,255,255,.5);
    border-radius:100%
}
.about_megvii-history .swiper-slide .years span.end span:before{
    left:-15px
}
.about_megvii-history .swiper-slide .years span.end span:after{
    left:-30px
}
.about_megvii-history .swiper-slide .years span:nth-child(2){
    color:#fff;
    text-align:center;
    cursor:auto;
    font-size:80px;
    line-height:112px
}
.about_megvii-history .swiper-slide .years span:last-child{
    text-align:right
}
.about_megvii-history .swiper-slide .animate{
    position:absolute;
    left:0;
    right:0;
    margin:auto;
    text-align:center;
    display:flex;
    flex-direction:column;
    justify-content:center;
    align-items:center;
    bottom:0
}
.about_megvii-history .swiper-slide .animate .line{
    width:2px;
    height:20px;
    margin-bottom:8px;
    background-color:#fff;
    -webkit-animation:animate_line 3s .3s linear both infinite;
    animation:animate_line 3s .3s linear both infinite
}
.about_megvii-history .swiper-slide:last-child .years span:last-child{
    cursor:auto
}
.swiper-pagination-clickable .swiper-pagination-bullet.about_megvii-more{
    cursor:default;
    font-size:40px!important
}
.swiper-pagination-clickable .swiper-pagination-bullet.about_megvii-more:hover{
    color:rgba(255,255,255,.4)!important
}
.about_megvii-history .swiper-slide .animate .text{
    font-size:12px;
    color:#fff;
    line-height:17px
}
.about_megvii-history .swiper-slide{
    overflow:hidden;
    height:520px
}
.about_megvii-history .swiper-slide .main{
    height:268px;
    overflow-y:scroll;
    overflow-x:hidden;
    margin-top:20px;
    position:absolute;
    left:-20px;
    right:-20px
}
.about_megvii-history .swiper-slide .content{
    font-size:16px;
    color:#fff;
    line-height:22px;
    margin-top:20px;
    width:490px;
    position:relative;
    left:50%
}
.about_megvii-history .swiper-slide .content .event{
    padding-bottom:35px;
    position:relative;
    padding-left:20px
}
.about_megvii-history .swiper-slide .content .desc{
    line-height:28px;
    font-size:16px
}
.about_megvii-history .swiper-slide .content .event .month{
    font-size:20px;
    font-weight:bolder;
    color:#fff;
    line-height:28px;
    margin-right:10px;
    position:absolute;
    left:-60px;
    top:-5px
}
.about_megvii-history .swiper-slide .content .event .line{
    width:7px;
    height:7px;
    background:#fff;
    border-radius:100%;
    display:inline-block;
    margin-right:16px;
    position:absolute;
    top:6px;
    left:-4px
}
.about_megvii-history .swiper-slide .content .event:after{
    content:"";
    position:absolute;
    top:11px;
    left:-1px;
    bottom:-11px;
    width:1px;
    background-color:#fff;
    text-align:right
}
.about_megvii-history .swiper-slide .content .event:last-child:after{
    display:none
}
.about_megvii-history .swiper-pagination{
    bottom:40px
}
.about_megvii-history .swiper-pagination .swiper-pagination-bullet{
    font-size:20px;
    color:rgba(255,255,255,.4);
    line-height:28px;
    margin-right:64px;
    width:auto;
    height:auto;
    opacity:1;
    background:0 0;
    transform:scale(1)
}
.about_megvii-history .swiper-pagination .swiper-pagination-bullet-active{
    color:#fff;
    position:relative
}
.about_megvii-history .swiper-pagination .swiper-pagination-bullet-active:after{
    content:"";
    position:absolute;
    left:0;
    right:0;
    height:2px;
    background-color:#fff;
    bottom:0
}
.about_megvii-history .parallax-bg{
    background-image:url(../../img/about_megvii/history_bg.0e315e13.jpg);
    background-repeat:no-repeat;
    position:absolute;
    left:0;
    top:0;
    width:130%;
    height:100%;
    background-size:cover;
    background-position:center
}
.about_megvii-history .swiper-button-next,.about_megvii-history .swiper-button-prev{
    background:0 0;
    width:200px;
    height:84px;
    top:194px;
    margin:0
}
.about_megvii-history .swiper-button-prev{
    left:0
}
.about_megvii-history .swiper-button-next{
    right:0
}
.about_megvii-video-modal,.about_megvii-video-modal .mask{
    position:fixed;
    top:0;
    left:0;
    right:0;
    bottom:0;
    z-index:102
}
.about_megvii-video-modal .mask{
    background:#000;
    opacity:.7
}
.about_megvii-video-modal .video-container{
    z-index:103;
    width:66.71875vw;
    min-width:615px;
    margin:auto;
    position:absolute;
    left:0;
    right:0;
    top:50%;
    transform:translateY(-50%);
    bottom:0;
    display:flex;
    align-items:center;
    justify-content:center
}
.about_megvii-video-modal .video-player-box{
    position:relative
}
.about_megvii-video-modal .video-container .close{
    position:absolute;
    right:10px;
    top:10px;
    z-index:1;
    color:#fff;
    font-size:18px;
    cursor:pointer
}
.about_megvii-video-modal .video-player-box .video-js{
    font-size:10px;
    color:#fff;
    width:66.71875vw;
    min-width:615px;
    height:37.5vw;
    min-height:345.75px
}
.about_megvii-video-modal .video-player-box .video-js *{
    outline:0
}
.about_megvii-video-modal .video-player-box .video-js .vjs-big-play-button{
    text-align:center;
    font-size:8em;
    height:8em;
    width:8em;
    border:0;
    border-radius:50%;
    background-color:rgba(255,255,255,.5);
    left:0;
    right:0;
    margin:auto;
    top:28.75em;
    line-height:8em
}
.about_megvii-video-modal .video-player-box .video-js .vjs-control-bar{
    background-color:transparent
}
.about_megvii-video-modal .video-player-box .video-js .vjs-load-progress,.about_megvii-video-modal .video-player-box .video-js .vjs-slider,.about_megvii-video-modal .video-player-box .video-js .vjs-slider-bar,.about_megvii-video-modal .video-player-box .video-js .vjs-volume-level{
    height:2px;
    background:#fff
}
.about_megvii-video-modal .video-player-box .video-js .vjs-slider{
    opacity:.4
}
.about_megvii-video-modal .video-player-box .video-js .vjs-load-progress:before{
    font-size:.5em
}
@media screen and (min-width:768px){
    .about_megvii-video-modal .video-player-box .video-js .vjs-slider:hover{
        opacity:.8
    }
    .about_megvii-history .swiper-pagination .swiper-pagination-bullet:hover{
        color:#fff
    }
    .about_megvii-banner-container .slogan-container .slogan-item:hover{
        top:-16px
    }
    .about_megvii-ability .abilities-contianer .ability-item:hover .content{
        transform:translateY(-110px)
    }
    .about_megvii-ability .abilities-contianer .ability-item:hover .bg{
        transform:scale(1.1,1.1)
    }
    .about_megvii-ability .abilities-contianer .ability-item:hover .content .desc{
        opacity:1
    }
    .about_megvii-banner-container .slogan-container .slogan-item:hover .title:after,.about_megvii-banner-container .slogan-container .slogan-item:hover .title:before{
        content:"";
        position:absolute;
        width:6px;
        height:17px;
        transform:skew(-10deg);
        background-color:#2590f2
    }
    .about_megvii-banner-container .slogan-container .slogan-item:hover .title:before{
        top:0;
        left:-14px;
        opacity:1
    }
    .about_megvii-banner-container .slogan-container .slogan-item:hover .title:after{
        top:0;
        right:-14px;
        opacity:1
    }
}
@media screen and (max-width:767px){
    .card,.card-dark{
        padding:.48rem 0
    }
    .about_megvii-banner-container .button{
        margin:0 auto .24rem
    }
    .button{
        height:.32rem;
        width:1.2rem;
        font-size:.12rem;
        line-height:.32rem;
        text-align:center;
        margin:0 auto
    }
    .about_megvii-video-modal .video-player-box .video-js{
        font-size:.05rem;
        width:.32rem
    }
    .about_megvii-banner-container{
        padding-top:1.01rem;
        width:100vw;
        height:initial
    }
    .about_megvii-banner-container>.title{
        font-size:.2rem;
        line-height:.28rem;
        margin-bottom:.21rem;
        font-weight:700
    }
    .about_megvii-banner-container>.desc{
        padding:0 .48rem;
        font-size:.12rem;
        line-height:.2rem;
        margin-bottom:.24rem
    }
    .about_megvii-banner-container .button .icon{
        width:.14rem;
        height:.14rem
    }
    .about_megvii-banner-container .slogan-container{
        margin:0 auto;
        padding:0;
        width:3.55rem;
        height:.98rem;
        display:flex;
        justify-content:space-between
    }
    .about_megvii-banner-container .slogan-container .slogan-item:first-child,.about_megvii-banner-container .slogan-container .slogan-item:last-child{
        padding:0
    }
    .about_megvii-banner-container .slogan-container .slogan-item{
        margin:0;
        height:initial;
        background:rgba(14,87,162,.3);
        padding:0;
        flex:1;
        transition:all .3s linear;
        position:relative;
        top:0;
        display:flex;
        flex-direction:column;
        justify-content:center;
        flex-basis:.9rem
    }
    .about_megvii-banner-container .slogan-container .slogan-item:nth-of-type(2){
        flex-basis:1.4rem
    }
    .about_megvii-banner-container .slogan-container .slogan-item .title{
        font-size:.1rem;
        font-family:PingFangSC-Medium,PingFang SC;
        font-weight:500;
        color:#fff;
        line-height:.14rem;
        margin-bottom:.04rem
    }
    .about_megvii-banner-container .slogan-container .slogan-item .desc{
        margin:0;
        font-size:.1rem;
        font-family:PingFangSC-Medium,PingFang SC;
        font-weight:400;
        color:#fff;
        line-height:.16rem
    }
    .about_megvii-brainpp .brainpp-img{
        display:none
    }
    .about_megvii-brainpp .main{
        width:100vw
    }
    .about_megvii-brainpp .content{
        padding:0 .24rem;
        width:100vw;
        text-align:justify
    }
    .about_megvii-brainpp .content .title{
        font-size:.24rem;
        line-height:.33rem;
        margin-bottom:.24rem;
        text-align:center;
        font-weight:700;
        font-family:PingFangSC-Medium,PingFang SC
    }
    .about_megvii-brainpp .content .desc p{
        font-size:.14rem;
        line-height:.24rem;
        margin-bottom:.24rem
    }
    .about_megvii-brainpp .content .button{
        margin-right:.24rem;
        height:.36rem
    }
    .btns-container{
        padding:0 .32rem;
        display:flex;
        justify-content:space-between
    }
    .about_megvii-brainpp .content .button:last-of-type{
        margin:0
    }
    .about_megvii-ability .abilities-contianer{
        display:flex;
        flex-direction:column
    }
    .about_megvii-ability .abilities-contianer .ability-item{
        height:1.76rem
    }
    .about_megvii-ability>.desc,.about_megvii-ability>.title{
        display:none
    }
    .about_megvii-ability .abilities-contianer .ability-item .content .desc{
        opacity:1;
        font-size:.1rem;
        line-height:.14rem
    }
    .about_megvii-ability .abilities-contianer .ability-item .content{
        position:absolute;
        top:0;
        right:0;
        left:0;
        bottom:0;
        padding:.52rem .24rem 0;
        text-align:justify
    }
    .about_megvii-ability .abilities-contianer .ability-item .content .title{
        font-size:.16rem;
        line-height:.22rem;
        margin-bottom:.08rem;
        text-align:left;
        font-weight:700
    }
    .about_megvii-declaration{
        width:100vw;
        height:7.37rem
    }
    .about_megvii-declaration-en{
        height:10.37rem
    }
    .card .card-title,.card-dark .card-title{
        font-size:.24rem;
        line-height:.33rem;
        font-family:PingFangSC-Medium,PingFang SC;
        font-weight:700
    }
    .about_megvii-declaration .content,.about_megvii-history .swiper-slide .content .desc{
        font-size:.14rem;
        font-family:PingFangSC-Regular,PingFang SC;
        font-weight:400;
        line-height:.24rem
    }
    .about_megvii-declaration .content{
        width:100vw;
        padding:.24rem;
        margin:0;
        color:#333
    }
    .about_megvii-declaration .goose-img{
        width:2rem;
        height:1.85rem;
        right:.1rem;
        bottom:-1rem
    }
    .about_megvii-history .swiper-slide .years{
        margin-top:.32rem
    }
    .about_megvii-history .swiper-slide .years span{
        line-height:.33rem;
        font-size:.24rem;
        font-weight:500
    }
    .about_megvii-history .swiper-slide .main{
        height:3.12rem;
        width:100vw;
        left:0
    }
    .about_megvii-history .swiper-slide .content{
        width:76vw;
        font-size:.14rem;
        line-height:.24rem;
        left:24vw
    }
    .about_megvii-history .swiper-slide .content .desc{
        display:inline-block;
        padding-right:.24rem;
        text-align:left;
        color:#fff
    }
    .about_megvii-banner-container .slogan-container .slogan-item .title:after,.about_megvii-banner-container .slogan-container .slogan-item .title:before{
        top:.02rem;
        opacity:1;
        width:.02rem;
        height:.08rem
    }
    .about_megvii-banner-container .slogan-container .slogan-item .title:before{
        left:-.05rem
    }
    .about_megvii-banner-container .slogan-container .slogan-item .title:after{
        right:-.05rem
    }
    .about_megvii-banner-container .slogan-container .slogan-item div{
        line-height:0;
        display:flex;
        justify-content:center;
        align-items:center
    }
    .about_megvii-history .swiper-slide{
        height:5.5rem
    }
    .about_megvii-history .swiper-slide .animate .line{
        height:.15rem
    }
    .about_megvii-history .swiper-slide .animate{
        bottom:.6rem
    }
    .about_megvii-history .swiper-pagination .swiper-pagination-bullet{
        margin-right:.3rem
    }
    .about_megvii-video-modal .video-container{
        width:100vw;
        min-width:initial
    }
    .about_megvii-video-modal .video-player-box .video-js{
        width:100vw;
        min-width:initial;
        height:2.5rem;
        min-height:initial
    }
    .about_megvii-video-modal .video-container .close{
        top:-.2rem;
        right:0
    }
    .about_megvii-banner-container .slogan-container .slogan-item:first-child .desc{
        margin:0
    }
    .about_megvii-history .swiper-pagination .swiper-pagination-bullet{
        font-size:.16rem;
        line-height:.28rem
    }
}