.about{
    padding: 100px 0;
}
.about .video{
    position: relative;
    float: right;
    width: 47.4%;
    margin: 0 0 60px 80px;
}
.about .video video{
    position: relative;
    display: block;
    width: 100%;
    z-index: 1;
}
.about .video::before{
    display: block;
    content: "";
    position: absolute;
    right: -20px;
    top: -30px;
    width: 180px;
    height: 180px;
    background: #DDDDDD;
}
.about .video::after{
    display: block;
    content: "";
    position: absolute;
    left: -20px;
    bottom: -30px;
    width: 320px;
    height: 180px;
    background: #E60113;
}
.about .text{
    position: relative;
    font-size: 16px;
    color: #333333;
    line-height: 2;
}
.about .text .line{
    position: absolute;
    left: 0;
    top: -40px;
    display: block;
    width: 100px;
    height: 2px;
    background: #E60113;
}
.about .text h3{
    font-size: 36px;
    font-family: PingFangSC-Medium, PingFang SC;
    font-weight: 500;
    color: #333333;
    line-height: 1;
    margin-bottom: .4rem;
}
.about .text p{
    margin: .2rem 0;
    text-indent: 2em;
}
@media only screen and (min-width: 1200px) and (max-width: 1920px) {
    .about{
        padding: 5.208vw 0;
    }
    .about .video{
        position: relative;
        float: right;
        width: 47.4%;
        margin: 0 0 3.125vw 4.166vw;
    }
    .about .video video{
        position: relative;
        display: block;
        width: 100%;
        z-index: 1;
    }
    .about .video::before{
        display: block;
        content: "";
        position: absolute;
        right: -1.041vw;
        top: -1.562vw;
        width: 9.375vw;
        height: 9.375vw;
        background: #DDDDDD;
    }
    .about .video::after{
        display: block;
        content: "";
        position: absolute;
        left: -1.041vw;
        bottom: -1.562vw;
        width: 16.66vw;
        height: 9.375vw;
        background: #E60113;
    }
    .about .text{
        position: relative;
        font-size: 0.833vw;
        color: #333333;
        line-height: 2;
    }
    .about .text .line{
        position: absolute;
        left: 0;
        top: -2.083vw;
        display: block;
        width: 5.208vw;
        height: 0.104vw;
        background: #E60113;
    }
    .about .text h3{
        font-size: 1.875vw;
        font-family: PingFangSC-Medium, PingFang SC;
        font-weight: 500;
        color: #333333;
        line-height: 1;
        margin-bottom: .4rem;
    }
    .about .text p{
        margin: .2rem 0;
        text-indent: 2em;
    }
}
@media (max-width:1200px) {
    .about{
        padding: .6rem 0;
    }
    .about .video{
        float: none;
        width: 100%;
        margin: 0 auto .6rem;
    }
    .about .video::before{
        width: 1.8rem;
        height: 1.8rem;
        right: -.2rem;
        top: -.3rem;
    }
    .about .video::after {
        display: block;
        content: "";
        position: absolute;
        left: -.2rem;
        bottom: -.3rem;
        width: 3.2rem;
        height: 1.8rem;
        background: #E60113;
    }
    .about .text{
        font-size: 14px;
    }
    .about .text .line{
        position: static;
    }
    .about .text h3{
        font-size: 28px;
        margin: .3rem 0;
    }
}
@media (max-width:640px) {
    .about .text h3{
        font-size: 22px;
    }
}
@media (max-width:460px) {
    .about .text h3{
        font-size: 18px;
    }
}