.about {
    padding-top: 96px;
}

.partTwo {
    padding-bottom: 140px;
}

.partTwo .title{
    padding-top: 100px;
    margin-bottom: 70px;
    font-size: 60px;
    font-weight: bold;
    color: #191919;
}

.partTwo .detail {
    font-size: 20px;
    color: #191919;
}

.partTwo .detail p{ max-width:1100px; line-height:24px; margin-bottom:25px}

.partThree {
    height: 540px;
    background-color: #efefef;
}

.partThree .mid {
    display: flex;
    height: 100%;
    align-items: center;
    justify-content: space-between;
}

.partThree .mid .item.l {
    display: flex;
    max-width: 454px;
    height: 330px;
    width: 100%;
    flex-wrap: wrap;
    color: #191919;
    text-align: left;
    justify-content: space-around;
}

.partThree .mid .item.l p {
    width: 100%;
}

.partThree .mid .item.l .c1 {
    font-size: 60px;
    font-weight: bold;
}

.partThree .mid .item.l .c2,
.partThree .mid .item.l .c3 {
    font-size: 15px;
}

.partThree .mid .item.l .c4 {
    font-size: 35px;
}

.partThree .mid .item.s {
    width: 305px;
    height: 254px;
    padding-left: 35px;
    padding-top: 35px;
    box-sizing: border-box;
    background-color: white;
}

.partThree .mid .item.s p {
    line-height: 25px;
    font-size: 14px;
    color: #191919;
}

.partThree .mid .item.s .name {
    margin-bottom: 25px;
    font-size: 25px;
    font-weight: bold;
}

.partOne {
    padding-top: 90px;
}

.partOne .txt {
    margin-bottom: 105px;
}

.partOne .txt p {
	text-transform:uppercase;
    max-width: 748px;
    font-size: 80px;
    font-weight: bold;
    color: #191919;
}

.partOne .bn {
    position: relative;
}

.partOne .bn {
    height: 612px;
    background-repeat: no-repeat;
    background-size: cover;
}

.partOne .bn .play {
    position: absolute;
    right: 260px;
    top: 0;
    cursor: pointer;
    transform: translateY(-129px);
}


@media (max-width:1024px){
.partOne .txt p{ font-size:65px;}
.partThree{ height:auto; overflow:hidden; padding:10% 0;}
.partThree .mid .item.l .c2, .partThree .mid .item.l .c3{ margin:5% 0;}
.partThree .mid .item.l{ height:auto;}
.partThree .mid{ display:block}
.partThree .mid .item.l{ width:100%; margin-bottom:5%; display:block;}
.partThree .mid .item.s{ float:left; width:32.33%;margin-right:1.5%;}
.partThree .mid .item.s:last-child{margin-right:0;}
.partOne .bn .play{ right:15%;}
.partOne,.partTwo .title{ padding-top:10%;}
.partOne .txt,.partTwo .title{ margin-bottom:10%;}
.partTwo{ padding-bottom:10%;}
.partTwo .title,.partThree .mid .item.l .c1{ font-size:55px;}
}

@media (max-width:768px){
.partOne .txt p{ font-size:50px;}
.partOne .bn{ height:450px;}
.partOne .bn .play{ width:125px;transform: translateY(-60px);}
.partTwo .title,.partThree .mid .item.l .c1{ font-size:45px;}
.partThree .mid .item.s{}
}

@media (max-width:640px){
.partThree .mid .item.s{ width:100%; margin:1% 0 !important; padding:7.5%; height:auto}
}

@media (max-width:480px){
.partThree .mid .item.s .name{ font-size:20px;}	
.partOne .txt p{ font-size:26px;}
.partOne .bn{ height:300px;}
.partOne .bn .play{ width:75px;transform: translateY(-40px);}
.partTwo .title,.partThree .mid .item.l .c1{ font-size:26px;}
.partTwo .detail{ font-size:15px;}
.partTwo .detail p{ line-height:22px;}
.partThree .mid .item.l .c4{ font-size:24px;}
}