@font-face {
    font-family: 'DTLNobelT'; 
    src: url('assets/fonts/DTLNobelT.otf') format('opentype');
    font-weight: normal;
}
@font-face {
    font-family: 'DTLNobelT-bold'; 
    src: url('assets/fonts/DTLNobelT-Bold.otf') format('opentype');
    font-weight: normal;
}
@font-face {
    font-family: 'DTLNobelT-light'; 
    src: url('assets/fonts/DTLNobelT-Light.otf') format('opentype');
    font-weight: normal;
}

*{
    margin: 0;
    padding: 0;
}
body{
    font-family: 'DTLNobelT', sans-serif;
    color: #333;
    background: #d0e6fd;
}
p{
    font-size: 15px;
    line-height: 1.6;
    margin:15px auto;
}

/* Header Start */
/* Swiper start */
.slider{
    position: relative;
    height: 100vh;
    overflow: hidden;
}
.slider .mb{
    display: block;
}
.slider .pc{
    display: none;
}
.slider .container {
    position: relative;
    width: 100vw;
    height: 100vh;
}
.slider .bg {
    width: 100%;
    height: 100%;
    object-fit: fill; 
    position: absolute;
    top: 0;
    left: 0;
    z-index: 0;
}
.slider .strip {
    position:absolute;
    left:0;
    width:100%;
    height:25%;
    overflow: hidden;            
    will-change: transform;
    z-index:1;
    transform: translateZ(0);
    backface-visibility: hidden;
}
.strip1 { top: 0; }
.strip2 { top: 25%; }
.strip3 { top: 50%; }
.strip4 { top: 75%; }
.slider .strip img {
    width:100%;height:100%;object-fit:cover;display:block;
    will-change: transform;     
    transform: translateY(0);
}

.op-bg{
    position: absolute;
    bottom: 0;
    z-index: 9;
    width: 100%;
    height: 190px;
    color: #fff;
    background: linear-gradient(
        rgba(0, 0, 0, 0),     /* 顶部透明 */
        rgba(0, 0, 0, .9)    /* 底部半透明黑 */
    );
    display: inline-block; 
}
.op-bg h1{
    font-family: 'DTLNobelT-bold'; 
    font-size: 26px;
    color: #fff;
    text-align: center;
    margin-top: -10px;
}
.logo{text-align: center;}
.logo img{
    width: 100px;
    height: 100px;
    margin: 0 auto;
}
.share-group{text-align: center;}
header .share-group{margin-top: 20px;}
header .share-group img{
    width: 20px;
    height: 20px;
    display: inline-block;
    margin:0 8px;
}

/* Intro start */
.intro, .theme .content-txt{
    padding: 10px 24px;
}
.intro-txt h3{
    font-family: 'DTLNobelT-bold'; 
    font-size: 1.2rem;
    margin-top: 10px;
}
.intro-txt img{
    width: 100%;
}
.intro-txt .code{
    text-align: center;
}
.intro-txt .code img{
    width: 20%;
}
.intro-txt .code p{
    font-family: "Tahoma", "Helvetica", sans-serif;
    font-size: 14px;
    color:#444;
    margin-top: 0;
}
.btn-more{
    width: 22vw;
    height: 30px;
    line-height: 30px;
    text-align: center;
    font-family: "Tahoma", "Helvetica", sans-serif;
    border: solid 2px #111;
    border-radius: 6px;
    cursor: pointer;
}
.intro .btn-more{
    font-size:14px;
    margin: 20px auto;
}
.theme .content .btn-more{
    margin: 20px 6px;
    border-color:#111;
}
.intro .content{
    display: none;
    margin-bottom: 20px;
}

/* Theme start */
.spacer {
    height: 600vh; 
}
.stack{
    position: sticky;
    top: 0;
    height: 100vh;
}
.theme{
    position: absolute;
    top:0;
    left:0;
    width: 100%;
    height: 100%;
}
.theme-nav{
    display: block;
    width: 85%;
    margin: 20% auto 0 auto;
}
.theme .title{
    text-align: left;
    color:#fff;
    margin: -60px 0 0 7%;
    width: 62%;
}
.theme h2{
    font-family: 'DTLNobelT-bold'; 
    font-size: 27px;
    line-height: 1.2;
}
.theme .summary{
    position: absolute;
    bottom: 0;
    color:#fff;
    text-align: left;
    padding: 20% 7% 12% 7%; 
    background: linear-gradient(
        rgba(0, 0, 0, 0),     
        rgba(0, 0, 0, .9) 
    );
}
.theme .btn-more{
    font-size:14px;
    border-color: #fff;
    display: inline-block;
    margin: 5px auto;
}
.theme .arrow-down{
    display: none;
    position: absolute;
    bottom:8px;
    left:50%;
    transform: translateX(-50%);
    width: 36px;
    height: 36px;
}
.theme section.content{
    background: #d0e6fd;
    position: absolute;
    top: 100vh;
    text-align: left;
    display: none;
}
.theme section.content img, .theme section.content video{
    width: 100%;
}
.theme section.content .caption, .intro-txt .caption{
    font-family: "Tahoma", "Helvetica", sans-serif;
    font-size: 14px;
    color:#444;
    margin-top: 0px;
}
.stack .t1{
    background: url('assets/screen1.jpg') no-repeat top center;
    background-size: cover;
    z-index:9;
}
.stack .t2{
    background: url('assets/screen2.jpg') no-repeat top center;
    background-size: cover;
    z-index:8;
}
.stack .t3{
    background: url('assets/screen3.jpg') no-repeat top center;
    background-size: cover;
    z-index:7;
}
.stack .t4{
    background: url('assets/screen4.jpg') no-repeat top center;
    background-size: cover;
    z-index:6;
}
.stack .t5{
    background: url('assets/screen5.jpg') no-repeat top center;
    background-size: cover;
    z-index:5;
}
.stack .t6{
    background: url('assets/screen6.jpg') no-repeat top center;
    background-size: cover;
    z-index:4;
}
footer{
    background: #111;
}
.theme section.content footer .logo, footer .logo img{
    width: 100px;
    height: 100px;
    margin: 20px auto 0px auto;
}
.theme section.content footer .share-group img, footer .share-group img{
    width:22px;
    height: 22px;
    display: inline-block;
    margin:0 8px;
}
footer p{
    font-size: 16px;
    line-height: 1.6;
    color:#ddd;
    margin: 0;
    padding: 24px;
}
footer .credit{
    font-family: 'DTLNobelT-light'; 
    font-size: 14px
}

@media only screen and (max-width: 390px){
    .op-bg{
        height: 28vh;
    }
    .theme h2{
        font-size: 22px;
    }
}

@media only screen and (min-width: 1080px){
    .slider .mb{
        display: none;
    }
    .slider .pc{
        display: block;
    }
    .op-bg{
        height: 270px;
    }
    .op-bg h1{
        font-family: 'DTLNobelT-bold';
        font-size: 38px;
        color: #fff;
        text-align: center;
        margin-top: -18px;
    }
    footer .logo{text-align: center;}

    .logo img{
        width: 160px;
        height: 160px;
        margin: 0 auto;
    }
    .share-group{text-align: center;margin-top: 10px;}
    header .share-group{text-align: center;margin-top: 30px;}
    .share-group img{
        width:20px;
        height: 20px;
        display: inline-block;
        margin:0 5px;
    }
    .intro{
        position: relative;
        display: flex;
        width: 640px;
        margin:20px auto;
    }
    .intro .intro-txt{
        flex: 1;
        position: relative;
        box-sizing: border-box;
    }
    .intro .btn-more{
        width: 120px;
        margin: 40px auto
    }
    .theme .summary{
        background: none;
    }
    .stack .theme-nav{
        margin: 340px 0 0 80px;
        width: 600px;
    }
    .stack .t1{
        background: url('assets/screen1-b.jpg') no-repeat top center;
        background-size: cover;
        z-index:9;
    }
    .stack .t2{
        background: url('assets/screen2-b.jpg') no-repeat top center;
        background-size: cover;
        z-index:8;
    }
    .stack .t3{
        background: url('assets/screen3-b.jpg') no-repeat top center;
        background-size: cover;
        z-index:7;
    }
    .stack .t4{
        background: url('assets/screen4-b.jpg') no-repeat top center;
        background-size: cover;
        z-index:6;
    }
    .stack .t5{
        background: url('assets/screen5-b.jpg') no-repeat top center;
        background-size: cover;
        z-index:5;
    }
    .stack .t6{
        background: url('assets/screen6-b.jpg') no-repeat top center;
        background-size: cover;
        z-index:4;
    }
    .theme .title{
        margin: -110px 0 0 80px;
        width: 400px;
    }
    .theme h2{
        font-size: 26px;
    }
    .theme .summary{
        width: 600px;
        bottom:20px;
        padding: 0 0 40px 80px; 
    }
    .theme .btn-more{
        width: 110px;
        margin: 0 0 10px 0;
        transition: box-shadow 0.4s ease;
    }
    .theme .btn-more:hover, .intro-txt .btn-more:hover{
        box-shadow:
        0 0 0 1px #fff inset,              
        0 0 10px 2px rgba(255,255,255,.2), 
        0 0 24px 6px rgba(255,255,255,.1);
    }
    .theme section.content .btn-more:hover{
        box-shadow:
        0 0 0 1px #fff inset,          
        0 0 9px 3px rgba(0,0,0,.15);
    }
    .theme section.content{
        width: 100%;
        padding:0;
    }
    .theme .content-txt{
        width: 640px;
        margin:20px auto;
        padding: 10px 0;
    }
    .theme .content .btn-more{
        border-color:#111;
        margin: 20px 10px;
    }
    footer{padding-bottom: 20px;}
    footer p{
        width: 640px;
        margin: 0 auto;
    }
}