.about-btit{
    position: relative;
    margin: 35px 0;
}
.about-btit img{
    width: auto;
    height: 70px;
}

.video-tit{
    position: absolute;
    top: 30px;
    left: 0;
}
.video-tit h1{
    font-size: 30px;
    font-weight: 600;
}
.video-tit p{
    font-size: 16px;
    margin-top: 10px;
}


.about-ul{
    padding: 30px 0;
    display: flex;
    flex-wrap: wrap;
}
.about-ul li{
    width: 31%;
    margin: 15px;
}
.about-ul li a{
    width: 100%;
    display: flex;
    flex-direction: column;
}
.about-utim{
    display: flex;
    align-items: center;
}
.about-utim img{
    width: 30px;
    height: 30px;
    border-radius: 50%;
}
.about-utim span{
    font-size: 14px;
    color: #999999;
    margin-left: 10px;
}
.about-utit{
    font-size: 16px;
    margin-top: 15px;
    color: #222222;
}



@media only screen and (max-width: 1400px) {
    .about-btit{
        margin: 30px 0;
    }
    .about-btit img {
        width: auto;
        height: 60px;
    }
    .video-tit{
        position: absolute;
        top: 25px;
        left: 0;
    }
    .video-tit h1{
        font-size: 26px;
    }
    .video-tit p{
        font-size: 14px;
        margin-top: 5px;
    }




    .about-ul {
        padding: 25px 0;
    }
    .about-ul li {
        margin: 12px;
    }
    .about-utim img {
        width: 25px;
        height: 25px;
    }
    .about-utim span {
        font-size: 12px;
        margin-left: 5px;
    }
    .about-utit {
        font-size: 14px;
        margin-top: 10px;
    }

}

@media only screen and (max-width: 769px) {
    .about-btit{
        margin: .3rem .1rem;
    }
    .about-btit img {
        width: auto;
        height: 50px;
    }
    .video-tit{
        position: absolute;
        top: .3rem;
        left: 0;
    }
    .video-tit h1{
        font-size: 20px;
    }
    .video-tit p{
        font-size: 12px;
        margin-top: .1rem;
    }



    .about-ul {
        padding: .25rem 0rem;
    }
    .about-ul li {
        width: 46%;
        margin: .1rem;
    }
    .about-utim img {
        width: 20px;
        height: 20px;
    }
    .about-utim span {
        font-size: 12px;
        margin-left: .1rem;
    }
    .about-utit {
        font-size: 14px;
        margin-top: .1rem;
    }



}