@charset "utf-8";

html,
body {
    margin: 0;
    padding: 0;
    font-size: 12px;
    list-style: none;
    scroll-behavior: smooth;
}

html,
body,
dl,
dt,
dd,
ul,
ol,
li,
h1,
h2,
h3,
h4,
h5,
h6,
pre,
form,
fieldset,
input,
button,
textarea,
p,
blockquote,
th,
td {
    padding: 0;
    margin: 0;
}

ul,
li,
img,
p,
dl,
dt,
dd {
    padding: 0;
    margin: 0;
    border: 0;
    list-style: none;
}

ul,
ol,
li,
dl,
dt,
dd {
    list-style: none;
}

img {
    vertical-align: top;
}

a {
    outline: none;
    text-decoration: none;
}

    a:hover {
        text-decoration: none;
    }

:root {
    --primary-color: #2d8cf0;
    --nav-bg: rgba(255, 255, 255, 0.95);
    --nav-height: 64px;
    --content-width: 1440px;
    --text-dark: #333;
    --text-light: #666;
    --transition-speed: 0.3s;
    font-family: "PingFang SC", sans-serif;
}

.banner {
    /* background: url(../images/techtopic/bg_header_4.png) no-repeat top center;
  height: 560px; */
    /* background-color: #bee3fe; */
}

    .banner img {
        aspect-ratio: 1440 / 460;
        width: 100%;
        height: auto;
    }

.nav-bar {
    font-size: clamp(15px, 2vw, 16px);
    width: 100%;
    height: var(--nav-height);
    z-index: 100;
    display: flex;
    align-items: center;
    /* justify-content: center; */
    position: sticky;
    /* position: relative; */
    top: 0;
    background: white;
    scroll-behavior: smooth;
}

    .nav-bar .nav-list {
        display: flex;
        width: fit-content;
        margin: 0 auto;
        max-width: var(--content-width);
    }

.nav-bar-mask {
    position: sticky;
    height: 44px;
    z-index: 1000;
    right: 0;
    left: 0;
    top: 0;
    bottom: 0;
    margin-left: auto;
    width: 13px;
    background: linear-gradient(to right, rgba(255,255,255,0), rgba(255,255,255,0.9)) no-repeat;
    pointer-events: none;
    margin-top: -44px;
}

.nav-bar dl {
    display: flex;
    align-items: center;
}

    .nav-bar dl dt {
        position: relative;
        padding: 0 20px;
        color: #323233;
    }

        .nav-bar dl dt a {
            color: #323233;
            opacity: 60%;
        }

            .nav-bar dl dt a.active {
                color: #0088ff;
                opacity: 100%;
            }

        .nav-bar dl dt:not(:last-child)::after {
            content: "";
            position: absolute;
            right: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 2px;
            height: 60%;
            /* 调整竖线高度 */
            background-color: rgba(0, 136, 255, 0.35);
            /* 竖线颜色 */
        }

.nav-bar .nav-list .logo {
    height: 22px;
    width: auto;
}

.backgroud {
    padding-bottom: 104px;
    background: #eaf3ff url(../images/techtopic/background.png) no-repeat top center;
    background-size: cover;
}

.content {
    margin: 0 auto;
    max-width: var(--content-width);
    height: auto;
    padding-top: 30px;
    /* padding-bottom: 100px; */
}

.paragraph {
    margin-top: 104px;
    padding: 0px 30px;
}

    .paragraph .title {
        margin: 0 auto;
        /* width: fit-content; */
        /* width: 235px; */
        height: 83px;
    }

        .paragraph .title.latest {
            background: url(../images/techtopic/title_latest.png) no-repeat top center;
        }

        .paragraph .title.driving {
            background: url(../images/techtopic/title_driving.png) no-repeat top center;
        }

        .paragraph .title.energy {
            background: url(../images/techtopic/title_energy.png) no-repeat top center;
        }

        .paragraph .title.vehicle {
            background: url(../images/techtopic/title_vehicle.png) no-repeat top center;
        }

        .paragraph .title.chip {
            background: url(../images/techtopic/title_chip.png) no-repeat top center;
        }

        .paragraph .title.exhibiton {
            background: url(../images/techtopic/title_exhibiton.png) no-repeat top center;
        }

.vedio-list {
    margin: 41px 30px 0;
}

    .vedio-list ul {
        max-width: 1100px;
        margin: 0 auto;
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 10px 2.25%;
        /* 水平居中 */
        padding: 0;
        /* 移除默认的内边距 */
        list-style: none;
        /* 移除列表样式 */
    }

        .vedio-list ul li {
            position: relative;
            text-align: center;
            /* 内容居中 */
        }

            /* .vedio-list ul li a { */
            /* display: inline-block; */
            /* width: fit-content; */
            /* } */

            .vedio-list ul li a p {
                margin: 0 auto;
                /* width: fit-content; */
            }

            .vedio-list ul li img {
                width: 94%;
                position: relative;
                z-index: 1;
                border-top-left-radius: 25px;
                border-top-right-radius: 25px;
                margin-top: 5%;
            }

    .vedio-list .border::before {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        aspect-ratio: 352 / 212;
        /* 与父容器的 padding 保持一致 */
        max-width: 352px;
        width: 100%;
        /* 与图片宽度一致 */
        height: auto;
        /* 高度减去上下 padding */
        background: url(../images/techtopic/vedio_border.png) no-repeat center center / cover;
        z-index: 2;
        /* 确保伪元素在图片上方 */
        pointer-events: none;
    }

    .vedio-list ul li span {
        display: block;
        margin: 0 auto;
        margin-top: 25px;
        padding-bottom: 25px;
        white-space: nowrap;
        /* 防止文本换行 */
        overflow: hidden;
        /* 隐藏溢出的内容 */
        text-overflow: ellipsis;
        /* 显示省略符号来代表被修剪的文本 */
        /* width: 340px; */
        font-size: 18px;
        color: #323233;
    }

    .vedio-list .time {
        z-index: 10;
        position: absolute;
        right: 7%;
        bottom: 10%;
        padding: 2px 8px;
        border-radius: 9999px;
        background: rgba(0, 0, 0, 0.5);
        color: #fff;
    }


    .vedio-list .more {
        width: 178px;
        height: 56px;
        background-color: rgba(0, 136, 255, 0.56);
        color: #ffffff;
        margin: 0 auto;
        display: flex;
        /* 设置为 Flex 布局 */
        justify-content: center;
        /* 水平居中 */
        align-items: center;
        /* 垂直居中 */
        font-size: 24px;
        letter-spacing: 0.5px;
        margin-top: 30px;
        border-radius: 8px;
    }

    .vedio-list .border {
        position: relative;
        /* overflow: hidden; */
    }



.footer {
    background-color: #01568f;
    color: #fff;
    padding: 40px 0;
    font-family: "PingFang SC", sans-serif;
    padding-bottom: 150px;
}

.footer-logo {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    padding-bottom: 60px;
}

    .footer-logo span {
        display: flex;
        justify-content: space-between;
        width: 138px;
        /* 播放按钮的宽度 */
        height: 44px;
        /* 播放按钮的高度 */
        background: url(../images/techtopic/logo.png) no-repeat center center / cover;
    }

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    padding: 0 20px;
}

.footer-section.about {
    flex: 4;
}

    .footer-section.about ul {
        display: flex;
        flex-wrap: wrap;
        justify-content: start;
        gap: 39px;
    }

        .footer-section.about ul li dl {
            width: 100px;
            height: 100px;
        }

        .footer-section.about ul li img {
            width: 100px;
            height: 100px;
            padding: 10px;
            background-color: rgba(255, 255, 255, 0.05);
        }

.footer-section:nth-child(3) {
    flex: 1;
}

.footer-section {
    flex: 2;
    min-width: 200px;
    margin-bottom: 20px;
}

    .footer-section h3 {
        font-size: 18px;
        margin-bottom: 15px;
        color: #fff;
    }

    .footer-section ul {
        list-style: none;
        padding: 0;
        margin-top: 20px;
    }

        .footer-section ul li {
            margin-bottom: 16px;
            font-size: 14px;
            color: #fff;
        }

            .footer-section ul li span {
                color: #fff;
                display: block;
                margin-top: 12px;
            }

            .footer-section ul li a {
                color: #fff;
                text-decoration: none;
            }

                .footer-section ul li a:hover {
                    color: #fff;
                }

#carousel {
    position: relative;
    width: 100%;
    /*width:1200px;*/
    margin: 0 auto;
}

    #carousel .swiper-container {
        padding-bottom: 10px !important;
    }

    #carousel .swiper-slide {
        position: relative;
        width: 500px !important;
        height: 281px !important;
        border-radius: 16px;
        box-shadow: 0px 1px 3x rgba(0, 0, 0, 0.15);
        overflow: hidden;
    }



.carousel-mobile .slide {
    position: relative;
}


.carousel-mobile .slick-dots {
    position: absolute;
    bottom: 8%;
    left: 0;
    right: 0;
    margin: auto;
    z-index: 99;
    display: flex;
    justify-content: center;
    gap: 3px;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.1);
}

    .carousel-mobile .slick-dots li {
        width: 6px;
        height: 2px;
        background-color: #89909b;
        border-radius: 9999px;
        transition: 0.3ms;
        cursor: pointer;
    }

        .carousel-mobile .slick-dots li button {
            display: none;
        }

        .carousel-mobile .slick-dots li.slick-active {
            background-color: #fff;
            width: 10px;
        }

#carousel .swiper-slide img {
    display: block;
    border-radius: 16px;
}

#carousel .swiper-slide p {
    line-height: 98px;
    padding-top: 0;
    text-align: center;
    color: #636363;
    font-size: 1.1em;
    margin: 0;
}

#carousel .swiper-pagination {
    width: 100%;
    bottom: 20px;
}

#carousel .swiper-pagination-bullets .swiper-pagination-bullet {
    margin: 0 5px;
    border: 3px solid #fff;
    background-color: #d5d5d5;
    width: 10px;
    height: 10px;
    opacity: 1;
}

#carousel .swiper-pagination-bullets .swiper-pagination-bullet-active {
    border: 3px solid #00aadc;
    background-color: #fff;
}

#carousel .swiper-button-prev {
    left: -30px;
    width: 45px;
    height: 45px;
    background: url(../../images/techtopic/wm_button_icon.png) no-repeat;
    background-position: 0 0;
    background-size: 100%;
}

    #carousel .swiper-button-prev:hover {
        background-position: 0 -46px;
        background-size: 100%;
    }

#carousel .swiper-button-next {
    right: -30px;
    width: 45px;
    height: 45px;
    background: url(../../images/techtopic/wm_button_icon.png) no-repeat;
    background-position: 0 -93px;
    background-size: 100%;
}

    #carousel .swiper-button-next:hover {
        background-position: 0 -139px;
        background-size: 100%;
    }

.swiper-button-container {
    position: absolute;
    left: 0;
    right: 0;
    margin: 0 auto;
    max-width: 1136px;
    top: 41%;
}

.swiper-wrapper {
    height: auto !important;
}

.imgShow a.leftarrow {
    background: url(./../images/techtopic/arrow_left.png) no-repeat;
    width: 40px;
    height: 40px;
    position: absolute;
    left: 1%;
    z-index: 50;
}

.imgShow a.rightarrow {
    background: url(./../images/techtopic/arrow_right.png) no-repeat;
    width: 40px;
    height: 40px;
    position: absolute;
    right: 1%;
    top: 41%;
    z-index: 50;
}

.imgShow a {
    backdrop-filter: blur(5px);
    border-radius: 100%;
}

.carousel-mobile {
    display: none !important;
}

.scroll-to-top {
    position: fixed;
    z-index: 100;
    cursor: pointer;
    width: 40px;
    height: 40px;
    right: 16px;
    bottom: 16px;
    background: url(./../images/techtopic/scroll-to-top.svg) no-repeat;
}

@media (max-width: 790px) {
    .vedio-list ul li img {
        border-top-left-radius: 20px;
        border-top-right-radius: 20px;
    }
}

@media (max-width: 768px) {
    body {
        display: contents;
    }
    /* .banner {
    background: none;
    height: auto;
  } */
    .banner img {
        width: 100%;
        display: block;
    }

    #carousel {
        display: none;
    }

    .carousel-mobile {
        display: block !important;
        position: relative;
        aspect-ratio: 344 / 208;
        margin-top: 24px;
        /* margin-left: 16px;
    margin-right: 16px; */
        text-align: center;
    }

        .carousel-mobile img {
            max-width: 94%;
            margin-top: 5%;
            margin-left: auto;
            margin-right: auto;
            border-radius: 50px 50px 0 0;
        }

    .slick-slide {
        height: auto !important;
        padding-bottom: 10px;
    }

    .carousel-mobile .slick-slide:after {
        content: "";
        position: absolute;
        /* display: none; */
        background: url(./../images/techtopic/swiper-mobile-border.svg) no-repeat center;
        background-size: contain;
        aspect-ratio: 344 / 208;
        /* max-width: 344px; */
        /* height: auto; */
        z-index: 10;
        top: 0;
        left: 0;
        right: 0;
        margin: auto;
        pointer-events: none;
    }

    .swiper-slide {
        width: 90% !important;
        height: auto !important;
    }

    .nav-bar {
        height: 44px;
        padding-top: 1px;
        margin-top: -1px;
        overflow-x: scroll;
        display: flex;
        flex-wrap: wrap;
        justify-self: flex-start;
        scrollbar-width: none;
    }

        .nav-bar::-webkit-scrollbar {
            display: none;
        }

        .nav-bar dl dt {
            width: max-content;
            padding: 0;
        }

            .nav-bar dl dt a {
                padding: 0px 8px;
            }

            .nav-bar dl dt:not(:last-child)::after {
                display: none;
            }

    .content {
        width: 100%;
        background-size: 100% 100%;
    }

    .paragraph {
        margin-top: 32px;
        padding: 0;
    }

    .content .paragraph {
        padding: 0 15px;
    }

    .paragraph + .paragraph {
        margin-top: 32px;
    }

    .paragraph .title {
        height: 42px;
    }

        .paragraph .title.latest {
            /* background: url(../images/techtopic/title_latest_wap.png) no-repeat top center; */
            background-size: contain;
        }

        .paragraph .title.driving {
            /* background: url(../images/techtopic/title_driving_wap.png) no-repeat top center; */
            background-size: contain;
        }

        .paragraph .title.energy {
            /* background: url(../images/techtopic/title_energy_wap.png) no-repeat top center; */
            background-size: contain;
        }

        .paragraph .title.vehicle {
            /* background: url(../images/techtopic/title_vehicle_wap.png) no-repeat top center; */
            background-size: contain;
        }

        .paragraph .title.chip {
            /* background: url(../images/techtopic/title_chip_wap.png) no-repeat top center; */
            background-size: contain;
        }

        .paragraph .title.exhibiton {
            /* background: url(../images/techtopic/title_exhibiton_wap.png) no-repeat top center; */
            background-size: contain;
        }

    .vedio-list {
        margin: 24px 16px 0;
    }

        .vedio-list ul {
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 10px 4.6%;
        }

            .vedio-list ul li img {
                border-top-left-radius: 20px;
                border-top-right-radius: 20px; /* Updated to match the new value */
            }

            .vedio-list ul li span {
                font-size: 14px;
                margin-top: 18px;
                padding-bottom: 8.5px;
            }
        /* .vedio-list ul li a {
    width: 100%;
  } */
        /* .vedio-list ul li div.border {
        background: url(../images/techtopic/vedio_border_wap.png) no-repeat center center / cover;
    } */

        .vedio-list .more {
            /* margin-bottom: 32px; */
            border-radius: 4px;
            width: 82px;
            height: 32px;
            font-size: 14px;
            margin-top: 24px;
        }

    .footer {
        display: none;
    }
    /* .vedio-list ul li p {
        padding: 4% 4% 2%;
    } */

    /* 默认样式 */
    .vedio-list ul li .border {
        position: relative;
        display: inline-block;
        /* padding: 3% 2% 1%; */
    }

    .vedio-list .border::before {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        background: url(../images/techtopic/vedio_border_wap.png) no-repeat center center / cover;
        z-index: 2; /* 确保边框在图片上方 */
        pointer-events: none; /* 不拦截点击事件 */
    }

    .vedio-list ul li img {
        position: relative;
        z-index: 1; /* 确保图片在边框下方 */
        width: 93%;
    }

    .vedio-list .border::after {
        border-radius: 25px 25px 0 0;
    }
}

@media (max-width: 500px) {
    .carousel-mobile img {
        border-radius: 28px 28px 0 0;
    }

    .vedio-list ul li img {
        border-top-left-radius: 12px;
        border-top-right-radius: 12px;
    }
}

/* 1.图片蒙层 
   2.banner

   wap
   1.查看更多按钮
*/