body {
    height: 100vh;
}
/* banner */
.banner-carousel, .banner-carousel-wrap {
    position: relative;
    height: 100%;
    text-align: center;
}
.banner-carousel .slick-list {
    width: 100%;
    height: 100%;
}
.banner-carousel .slick-track {
    width: 100%;
    height: 100%;
}
.banner-carousel .banner {
    width: 100%;
    height: 100%;
}
.banner-carousel .banner .banner-text-wrap {
    position: absolute;
    left: 0;
    top: 0;
    display: table;
    width: 100%;
    height: 100%;
    z-index: 1;
    text-align: center;
}
.banner-carousel .banner .banner-text {
    display: table-cell;
    vertical-align: middle;
}
.banner-carousel .banner .banner-text h2 {
    line-height: 140px;
    font-size: 100px;
    font-weight: 600;
    letter-spacing: 1px;
    text-shadow: 0px 0px 9px 0px rgba(0, 0, 0, 0.5);
    color: #ffffff;
}
.banner-carousel .banner .banner-text h3 {
    line-height: 70px;
    font-size: 50px;
    font-weight: 400;
    color: #ffffff;
}
.banner-carousel .banner video {
    height: 100%;
    width: 100%;
    z-index: -10;
    object-fit: cover;
}
.carousel-dots {
    position: absolute;
    bottom: 209px;
    width: 100%;
    text-align: center;
}
.carousel-dots>* {
    display: inline-block;
    margin: 0 5px;
}
.carousel-dots .progress {
    width: 108px;
    height: 8px;
    border: 1px solid #ffffff;
    border-radius: 4px;
}
.carousel-dots .progress i {
    display: block;
    width: 0;
    height: 100%;
    background-color: #ffffff;
}
.carousel-dots .dot {
    width: 8px;
    height: 8px;
    background-color: #ffffff;
    border-radius: 50%;
}
.banner-carousel-wrap .scroll-down-wrap {
    position: absolute;
    bottom: 54px;
    width: 100%;
    text-align: center;
}
.banner-carousel-wrap .scroll-down {
    display: inline-block;
    width: 66px;
    height: 43px;
    background: url('../images/pc/1x/page_down.png') 0 0 no-repeat;
    background-size: 66px 43px;
    border: none;
    outline: none;
    cursor: pointer;
}
.mobile-banner {
    display: none;
}
.nav-grids-wrap {
    width: 1200px;
    margin: 0 auto;
    padding-top: 109px;
    text-align: center;
}
.nav-grids-wrap hr {
    margin: 0 15px;
    color: #979797;
}
.nav-grids-wrap h3 {
    display: inline-block;
    position: relative;
    top: -26px;
    padding: 0 63px;
    text-align: center;
    font-size: 24px;
    line-height: 52px;
    color: #333333;
    font-weight: normal;
    letter-spacing: 12px;
    background-color: #ffffff;
}
.nav-grids-inner {
    padding-top: 68px;
}
.nav-grids-wrap .nav-grid {
    float: left;
    width: 370px;
    margin: 0 11px 114px;
    text-align: left;
    position: relative;
}
.nav-grids-wrap .nav-grid img {
    width: 100%;
}
.nav-grids-wrap h4 {
    margin: 54px 0 5px;
    font-size: 32px;
    color: #222328;
    text-align: left;
    font-weight: 400;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.nav-grids-wrap a {
    text-align: left;
    color: #3B55E6;
    font-size: 24px;
    line-height: 33px;
}
.nav-grids-wrap .nav-grid a.link_A {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
}
.nav-grids-wrap a i.arrow {
    margin-left: 13px;
    vertical-align: 4px;
}
i.arrow {
    display: inline-block;
    width: 5px;
    height: 8px;
    background: url('../images/pc/1x/arrow.png') 0 0 no-repeat;
    background-size: 5px 8px;
}
.other-sites {
    height: 400px;
    line-height: 400px;
    background: url('../images/pc/1x/other-sites-bg.png') bottom center no-repeat;
    background-size: cover;
    text-align: center;
}
.other-sites a {
    font-size: 48px;
    color: #ffffff;
}
.other-sites a i {
    margin-left: 3px;
    display: inline-block;
    width: 13px;
    height: 26px;
    background: url('../images/pc/1x/arrow-white.png') 0 0 no-repeat;
    background-size: 13px 26px;
    vertical-align: 3px;
}
/* media query */
@media (-webkit-min-device-pixel-ratio: 2), (-moz-min-device-pixel-ratio: 2), (min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .banner-carousel-wrap .scroll-down {
        background-image: url('../images/pc/2x/page_down.png');
    }
    i.arrow {
        background-image: url('../images/pc/2x/arrow.png');
    }
    .other-sites {
        background-image: url('../images/pc/2x/other-sites-bg.png');
    }
    .other-sites a i {
        background-image: url('../images/pc/2x/arrow-white.png');
    }
}
@media screen and (max-width: 1200px) and (-webkit-min-device-pixel-ratio: 2), screen and (max-width: 1200px) and (-moz-min-device-pixel-ratio: 2), screen and (max-width: 1200px) and (min-device-pixel-ratio: 2), screen and (max-width: 1200px) and (min-resolution: 192dpi) {
    body {
        min-width: unset;
        width: 100%;
    }
    .banner-carousel-wrap {
        display: none;
    }
    .mobile-banner {
        display: block;
        position: relative;
        height: 100%;
        text-align: center;
        background: url('../images/mobile/2x/banner1.png') center;
        background-size: cover;
        image-rendering: -webkit-optimize-contrast;
    }
    .mobile-banner .banner-text-wrap {
        display: table;
        height: 100%;
        width: 100%;
    }
    .mobile-banner .banner-text-wrap .banner-text {
        display: table-cell;
        vertical-align: middle;
    }
    .mobile-banner .banner-text-wrap .banner-text h2 {
        font-size: 40px;
        font-weight: 500;
        letter-spacing: 1px;
        color: #ffffff;
    }
    .mobile-banner .banner-text-wrap .banner-text h3 {
        font-size: 20px;
        font-weight: 400;
        color: #ffffff;
    }
    .mobile-banner .scroll-down-wrap {
        position: absolute;
        bottom: 117px;
        width: 100%;
        text-align: center;
    }
    .mobile-banner .scroll-down-wrap .scroll-down {
        display: inline-block;
        width: 33px;
        height: 22px;
        background: url('../images/mobile/2x/page_down.png') 0 0 no-repeat;
        background-size: 33px 22px;
        border: none;
        outline: none;
        cursor: pointer;
    }
    .nav-grids-wrap {
        width: 100%;
        padding-top: 25px;
    }
    .nav-grids-wrap hr {
        margin: 0;
    }
    .nav-grids-wrap h3 {
        font-size: 12px;
        padding: 0 30px;
        line-height: 26px;
        letter-spacing: 6px;
        top: -14px;
    }
    .nav-grids-inner {
        padding: 0 5px;
    }
    .nav-grids-wrap .nav-grid {
        width: 50%;
        margin: 0 0 20px 0;
        padding: 0 5px;
    }
    .nav-grids-wrap h4 {
        margin: 18px 0 0 0;
        font-size: 18px;
    }
    .nav-grids-wrap a {
        font-size: 12px;
        line-height: 1em;
        letter-spacing: 1px;
    }
    .nav-grids-wrap a i.arrow {
        display: inline-block;
        margin-left: 6px;
        width: 12px;
        height: 12px;
        background: url('../images/mobile/2x/arrow.png') 0 0 no-repeat;
        background-size: 12px;
        vertical-align: -1px;
    }
    .other-sites {
        height: 120px;
        line-height: 120px;
        background-image: url('../images/mobile/2x/other-sites-bg.png');
    }
    .other-sites a {
        font-size: 14px;
    }
    .other-sites a i {
        width: 5px;
        height: 10px;
        background-size: 5px 10px;
        vertical-align: middle;
    }
}
@media screen and (max-width: 1200px) and (-webkit-min-device-pixel-ratio: 3), screen and (max-width: 1200px) and (-moz-min-device-pixel-ratio: 3), screen and (max-width: 1200px) and (min-device-pixel-ratio: 3), screen and (max-width: 1200px) and (min-resolution: 240dpi) {
    .mobile-banner {
        background-image: url('../images/mobile/3x/banner1.png');
    }
    .mobile-banner .scroll-down-wrap .scroll-down {
        background-image: url('../images/mobile/3x/page_down.png');
    }
    .nav-grids-wrap a i.arrow {
        background-image: url('../images/mobile/3x/arrow.png');
    }
    .other-sites {
        background-image: url('../images/mobile/3x/other-sites-bg.png');
    }
}