html,body{
    margin: 0;
    padding:0;
    background: #111;
}
.header{
    width: 1200px;
    margin: 0 auto;
    background: #111;
    height: 80px;
    display: flex;
    align-items: center;
    color: #fff;
    font-size: 22px;
}
.header>.logo{
    display: flex;
    align-items: center;
    justify-content: center;
}
.header>.logo>img{
    width: 64px;
    margin-right: 20px;
}
.part1{
    width: 100%;
    height: 900px;
    background: url('./images/top-bg.png') center no-repeat;
    margin: auto;
    background-size: 100% 100%;
}
.part1>.content{
    width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    padding-top: 150px;
    position: relative;
    color: #fff;
}
.part1>.content h1{
    font-size: 54px;
}
.part1>.content h4{
    font-size: 18px;
}
.part1>.content .btn-download{
    display: flex;
    height: 84px;
    width: 300px;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
    text-decoration: none;
    background: linear-gradient(to right, #08d4aa, #7ffd7b);
    margin-top: 100px;
}
.part1>.content .btn-download:hover{
    background: linear-gradient(to right, #18e4ba, #8fff8b);
}
.part1>.content .btn-download:active{
    background: linear-gradient(to right, #00c49a, #6fdf6b);
}
.part1>.content .version{
    color: #aaa;
    font-size: 12px;
    margin-top: 30px;
}
.part1>.content .right{
    width: 620px;
    position: relative;
}
.part1>.content .right img:first-child{
    width: 650px;
    right: -61px;
    top: 11px;
    animation: p1Img1 5s linear infinite;
}
.part1>.content .right img:nth-child(2){
    position: absolute;
    top: 0;
    width: 108px;
    right: 343px;
    animation: p1Img2 6s linear infinite;
}
.part1>.content .right img:nth-child(3){
    position: absolute;
    width: 93px;
    right: 75px;
    top: -15px;
    animation: p1Img3 7s linear infinite;
}
.part2{
    width: 100%;
    height: 900px;
    background: #111;
    margin: auto;
    background-size: 100% 100%;
}
.part2>.content{
    width: 1200px;
    margin: 0 auto;
    padding-top: 150px;
    position: relative;
    color: #fff;
}
.part2>.content h1{
    font-size: 48px;
}
.part2>.content>.items{
    width: 100%;
    display: flex;
    justify-content: space-between;
    margin-top: 80px;
}

.part2>.content>.items>.item{
    width: 360px;
    height: 400px;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.part2>.content>.items>.item:first-child{
    background: url('images/card1.png');
}
.part2>.content>.items>.item:nth-child(2){
    background: url('images/card2.png');
}
.part2>.content>.items>.item:nth-child(3){
    background: url('images/card3.png');
}
.part2>.content>.items>.item>h4{
    font-size: 24px;
    color: #00fc92;
    margin-top: 245px;
    margin-bottom: 20px;
}
.part2>.content>.items>.item>p{
    line-height: 30px;
    padding: 0 20px;
    font-size: 14px;
}
.part4{
    width: 100%;
    height: 440px;
    background: url('./images/footer-bg.png') center no-repeat;
    margin: auto;
    background-size: 100% 100%;
}
.part4>.content{
    width: 1200px;
    margin: 0 auto;
    padding-top: 80px;
    position: relative;
    color: #fff;
}
.part4>.content>.left>h1{
    font-size: 48px;
}
.part4>.content>.left>h3{
    color:#eee;
}
.part4>.content .btn-download{
    display: flex;
    height: 84px;
    width: 300px;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
    text-decoration: none;
    background: linear-gradient(to right, #dfcd01, #efdd11);
    margin-top: 60px;
}
.part4>.content .btn-download:hover{
    background: linear-gradient(to right, #efdd11, #ffed21);
}
.part4>.content .btn-download:active{
    background: linear-gradient(to right, #cfbd01, #dfcd01);
}
.part4>.content>.right img{
    position: absolute;
    top: -90px;
    right: 20px;
}
.bottom{
    background: #111;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #888;
}
.bottom>.content{
    width: 1200px;
    font-size: 12px;
    text-align: center;
}
.bottom>.content a{
    color: #888;
}
@keyframes p1Img1 {
    25% {
        -webkit-transform: translate(0,10px);
        transform: translateY(10px)
    }

    75% {
        -webkit-transform: translate(0,-10px);
        transform: translateY(-10px)
    }
}

@keyframes p1Img2 {
    25% {
        -webkit-transform: translate(10px,10px);
        transform: translate(10px,10px)
    }

    50% {
        -webkit-transform: translate(-10px,10px);
        transform: translate(-10px,10px)
    }

    75% {
        -webkit-transform: translate(10px,-10px);
        transform: translate(10px,-10px)
    }
}

@keyframes p1Img3 {
    25% {
        -webkit-transform: translate(-10px,10px);
        transform: translate(-10px,10px)
    }

    50% {
        -webkit-transform: translate(10px,10px);
        transform: translate(10px,10px)
    }

    75% {
        -webkit-transform: translate(-10px,-10px);
        transform: translate(-10px,-10px)
    }
}

@keyframes move {
    0% {
        transform: translate(0)
    }

    to {
        transform: translate(-100%)
    }
}
@media screen and (max-width: 540px) {
    .header>.logo>img{
        width: 48px;
    }
    .part1>.content, .part2>.content{
        padding-top: 50px;
    }
    .part1>.content h1{
        font-size: 34px;
    }
    .part1>.content .btn-download{
        height: 52px;
        font-size: 18px;
    }
    .part2>.content>.items{
        margin-top: 0;
    }
    .part2>.content h1{
        font-size: 30px;
    }
    .part4>.content>.left>h1{
        font-size: 36px;
    }
}
@media screen and (max-width: 1200px) {
    .header{
        display: flex;
        align-items: center;
        justify-content: center;
        width: 100%;
    }
    .part1,.part2,.part4{
        height: auto;
        padding-bottom: 100px;
    }
    .part1>.content,.part2>.content,.part4>.content{
        text-align: center;
        width: 100%;
    }

    .part1>.content .right{
        display: none;
    }
    .part1>.content .left{
        width: 100%;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
    }

    .part2>.content .items{
        flex-direction: column;
        align-items: center;
        justify-content: center;
    }
    .part2>.content .items>.item{
        margin-top: 80px;
    }
    .part2>.content h1{
        padding: 0 20px;
    }
    .part4>.content .right {
        display: none;
    }
    .part4>.content .left{
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
    }
    .part4>.content .btn-download{
        height: 52px;
        font-size: 18px;
    }
}