@-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
    }
}

.card .card-title, .card-dark .card-title {
    font-size: 32px;
    font-weight: 600;
    color: #333;
    line-height: 60px;
    text-align: center;
}

.about_megvii-ability,
.about_megvii-banner-container .slogan-container .slogan-item .title {
    position: relative
}

.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: #fff;
    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 .content2 {
    position: absolute;
    width: 100%;
    /* top: 360px; */
    bottom: -20px;
    padding: 40px 50px;
    text-align: center;
    transition: all .3s
}

.about_megvii-ability .abilities-contianer .ability-item .content2 .title {
    font-size: 24px;
    font-weight: bolder;
    color: #fff;
    line-height: 40px;
    /* margin-bottom: 16px */
}

.about_megvii-ability .abilities-contianer .ability-item .content2 .desc {
    font-size: 14px;
    color: #fff;
    line-height: 20px;
    /* margin-bottom: 16px; */
    text-align: center;
    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 .content2 .learn-more {
    font-size: 14px;
    font-weight: bolder;
    color: #2590f2;
    line-height: 28px
}

@media screen and (min-width:768px) {
    .about_megvii-ability .abilities-contianer .ability-item:hover .content2 {
        transform: translateY(-100px)
    }

    .about_megvii-ability .abilities-contianer .ability-item:hover .bg {
        transform: scale(1.1, 1.1)
    }

    .about_megvii-ability .abilities-contianer .ability-item:hover .content2 .desc {
        opacity: 1
    }

    .about_megvii-history .swiper-pagination .swiper-pagination-bullet:hover {
        color: #fff
    }

}

@media screen and (max-width:767px) {

    .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 .content2 .desc {
        opacity: 1;
        font-size: .1rem;
        line-height: .14rem
    }

    .about_megvii-ability .abilities-contianer .ability-item .content2 {
        position: absolute;
        top: 0;
        right: 0;
        left: 0;
        bottom: 0;
        padding: .52rem .24rem 0;
        text-align: justify
    }

    .about_megvii-ability .abilities-contianer .ability-item .content2 .title {
        font-size: .16rem;
        line-height: .22rem;
        margin-bottom: .08rem;
        text-align: left;
        font-weight: 700
    }

    .about_megvii-history .swiper-slide .content2 .desc {
        font-size: .14rem;
        font-family: PingFangSC-Regular, PingFang SC;
        font-weight: 400;
        line-height: .24rem
    }

    .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 .content2 {
        width: 76vw;
        font-size: .14rem;
        line-height: .24rem;
        left: 24vw
    }

    .about_megvii-history .swiper-slide .content2 .desc {
        display: inline-block;
        padding-right: .24rem;
        text-align: left;
        color: #fff
    }

    .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-history .swiper-pagination .swiper-pagination-bullet {
        font-size: .16rem;
        line-height: .28rem
    }


}



.about_megvii-history {
    padding-bottom: 100px;
    position: relative;
}

.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 .content2 {
    font-size: 16px;
    color: #fff;
    line-height: 22px;
    margin-top: 20px;
    width: 490px;
    position: relative;
    left: 50%
}

.about_megvii-history .swiper-slide .content2 .event {
    padding-bottom: 35px;
    position: relative;
    padding-left: 20px
}

.about_megvii-history .swiper-slide .content2 .desc {
    line-height: 28px;
    font-size: 16px
}

.about_megvii-history .swiper-slide .content2 .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 .content2 .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 .content2 .event:after {
    content: "";
    position: absolute;
    top: 11px;
    left: -1px;
    bottom: -11px;
    width: 1px;
    background-color: #fff;
    text-align: right
}

.about_megvii-history .swiper-slide .content2 .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(../images/history_bg.0e315e13.jpg);
    background-repeat: no-repeat;
    position: absolute;
    left: 0;
    top: 0;
    width: 130%;
    height: 100vh;
    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
}