html,body{
    height: 100%;
    overflow: hidden;
}
body{
    margin: 0;
    padding: 0;
    background: #000;
    color: #fff;
}
.container{
    width: 100%;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
        -ms-flex-flow: column;
            flex-flow: column;
    height: 100vh;
    background: url('./background.png') no-repeat right top;
    background-size: 100% auto;
}

.container header {
    padding: 45px 50px 0;
}

.container header .logo {
    width: 72px;
}

.container header .title{
    padding: 195px 154px 52px;
}

.container header .title img {
    width: 388px;
    max-width: 90%;
}
.desc {
    padding: 0 154px;
}
.desc p {
    margin: 0 0 20px;
    padding: 0 40px 0 0;
    font-size: 54px;
    line-height: 54px;
    font-weight: 600;
}

.desc p:first-child{
    display: inline-block;
    background: -o-linear-gradient(bottom, #007BE6 16px, transparent 16px);
    background: linear-gradient(to top, #007BE6 16px, transparent 16px);
    background-size: 100% auto;
    position: relative;
}

.desc p:first-child::after{
    display: block;
    content: '';
    width: 16px;
    height: 16px;
    background: #007BE6;
    position: absolute;
    right: -16px;
    bottom: 16px;
}

.container footer {
    -webkit-box-flex: 1;
        -ms-flex: 1;
            flex: 1;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
        -ms-flex-flow: column;
            flex-flow: column;
    background: -webkit-gradient(linear, left bottom, left top, color-stop(50%, #00000085), to(transparent));
    background: -o-linear-gradient(bottom, #00000085 50%, transparent);
    background: linear-gradient(to top, #00000085 50%, transparent);
}
.space{
    -webkit-box-flex: 1;
        -ms-flex: 1;
            flex: 1;
}
.nav {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    gap: 40px 50px;
    -ms-flex-negative: 0;
        flex-shrink: 0;
    -webkit-box-pack: justify;
        -ms-flex-pack: justify;
            justify-content: space-between;
    -webkit-box-align: center;
        -ms-flex-align: center;
            align-items: center;
    padding: 30px 154px 50px;
}
.nav .item {
    max-width: 320px;
    -webkit-animation-delay: 0.1s;
            animation-delay: 0.1s;
}
.nav .item:nth-child(2) {
    -webkit-animation-delay: 0.15s;
            animation-delay: 0.15s;
}
.nav .item:nth-child(3) {
    -webkit-animation-delay: 0.15s;
            animation-delay: 0.15s;
}
.nav .item:nth-child(4) {
    -webkit-animation-delay: 0.25s;
            animation-delay: 0.25s;
}
.nav .item:nth-child(5) {
    -webkit-animation-delay: 0.3s;
            animation-delay: 0.3s;
}
.nav .item a{
    display: block;
    position: relative;
    padding-bottom: 12px;
}

.nav .item a::after{
    display: block;
    content: '';
    width: 0;
    height: 4px;
    background: #007BE6;
    position: absolute;
    bottom: 0;
    left: 50%;
    -webkit-transform: translateX(-50%);
        -ms-transform: translateX(-50%);
            transform: translateX(-50%);
    -webkit-transition: all .3s;
    -o-transition: all .3s;
    transition: all .3s;
}
.nav .item a:hover::after{
    width: 60px;
}
.nav .item a img{
    max-width: 80%;
    height: auto;
    opacity: .85;
    transition: all .3s;
}
.nav .item a:hover img{
    opacity: 1;
    transform: scale(1.1);
}
.copyright{
    text-align: center;
    color: #f4f4f4;
    font-size: 12px;
    line-height: 20px;
    opacity: .9;
}
.copyright a{
    color: #f4f4f4;
    margin-left: 10px;
}
.under{
    height: 40px;
    background: -webkit-gradient(linear, left bottom, left top, color-stop(50%, white), color-stop(50%, transparent));
    background: -o-linear-gradient(bottom, white 50%, transparent 50%);
    background: linear-gradient(to top, white 50%, transparent 50%);
    position: relative;
}
.under::before{
    display: block;
    position: absolute;
    content: '';
    width: 20px;
    height: 20px;
    background: #fff;
    left: 20px;
    bottom: 20px;
}
.under::after{
    display: block;
    content: '';
    width: 20px;
    height: 20px;
    background: #000;
    margin-left: 20px;
}

@media (max-height: 480px) {
    .container header {
        padding: 20px 20px 0;
    }
    .container header .title{
        padding-top: 10px;
        padding-bottom: 10px;
    }
    .desc p {
        padding: 0;
        font-size: 36px;
        line-height: 36px;
    }
}
@media (max-height: 640px) {
    .container header {
        padding: 20px 20px 0;
    }
    .container header .title{
        padding-top: 30px;
        padding-bottom: 30px;
    }
}

@media (max-height: 720px) {
    .container header .title{
        padding-top: 60px;
        padding-bottom: 30px;
    }
}

@media (max-width: 1536px) {
    .container{
        background-size: 1400px auto;
    }
    .container header .title{
        padding: 120px 100px 82px;
    }
    .desc {
        padding: 0 100px;
    }
}


@media (max-width: 1280px) {
    .container{
        background-size: 1280px auto;
    }
    .container header{
        padding: 30px 30px 0;
    }
    .container header .title{
        padding: 100px 80px 82px;
    }
    .desc {
        padding: 0 80px;
    }
    .nav{
        padding: 0 80px 40px;
    }
    .nav .item a img{
        max-width: 90%;
    }
}

@media (max-width: 1024px) {
    .container{
        background-size: 950px auto;
    }
    .container header .title{
        padding: 100px 40px 82px;
    }
    .desc {
        padding: 0 40px;
    }
    .desc p {
        padding: 0;
        font-size: 36px;
        line-height: 36px;
    }
    .nav{
        padding: 0 60px 30px;
    }
    .nav .item a img{
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    html,body{
        height: auto;
        overflow: inherit;
    }
    .container{
        background-size: 500px auto;
    }
    .container header .title{
        padding: 80px 0 32px;
        text-align: center;
    }
    .desc {
        padding: 0;
        text-align: center;
    }
    .nav {
        padding: 40px 80px;
        -webkit-box-orient: vertical;
        -webkit-box-direction: normal;
            -ms-flex-flow: column;
                flex-flow: column;
    }
    .nav .item{
        width: 65%;
        min-width: 180px;
        margin-bottom: 15px;
    }
}