:root {
    --ink: #131923;
    --muted: #69717d;
    --orange: #ff6a00;
    --blue: #1571ff;
    --paper: #f5f7fa;
    --line: #dfe4ea
}

* {
    box-sizing: border-box
}

html {
    scroll-behavior: smooth
}

body {
    margin: 0;
    font-family: Inter, "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--ink);
    background: #fff
}

.site-header {
    position: absolute;
    z-index: 20;
    top: 0;
    left: 0;
    width: 100%;
    height: 88px;
    display: flex;
    align-items: center;
    padding: 0 4.2vw;
    color: #fff
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    color: inherit;
    text-decoration: none;
    min-width: 320px
}

.brand-mark {
    display: grid;
    place-items: center;
    width: 38px;
    height: 38px;
    font-size: 24px;
    font-weight: 900;
    border: 2px solid currentColor;
    transform: skew(-8deg)
}

.brand b {
    display: block;
    letter-spacing: 2px;
    font-size: 15px
}

.brand small {
    display: block;
    font-size: 10px;
    opacity: .8;
    margin-top: 2px
}

.site-header nav {
    margin: auto;
    display: flex;
    gap: 34px
}

.site-header nav a {
    color: inherit;
    text-decoration: none;
    font-size: 15px;
    font-weight: 600;
    opacity: .78;
    position: relative
}

.site-header nav a:hover,
.site-header nav .active {
    opacity: 1
}

.site-header nav .active:after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -11px;
    margin: auto;
    width: 18px;
    height: 2px;
    background: var(--orange)
}

.globe {
    border: 0;
    background: transparent;
    color: inherit;
    font-size: 25px
}

.hero {
    position: relative;
    min-height: 800px;
    overflow: hidden;
    background: radial-gradient(circle at 72% 42%, #fff 0 10%, #e8edf2 31%, transparent 54%), linear-gradient(135deg, #172131 0%, #303d4c 44%, #d7dde2 100%);
    color: #fff;
    padding: 190px 7vw 100px
}

.hero:after {
    content: "";
    position: absolute;
    inset: auto 0 0;
    height: 250px;
    background: linear-gradient(180deg, transparent, rgba(5, 10, 16, .36))
}

.hero-copy {
    position: relative;
    z-index: 4;
    width: 52%
}

.eyebrow,
.section-heading p,
.kicker {
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 3px;
    color: var(--orange)
}

.hero h1 {
    font-size: 96px;
    line-height: .92;
    margin: 30px 0 28px;
    letter-spacing: -5px
}

.hero h1 span {
    color: #fff;
    text-shadow: 0 0 40px rgba(255, 255, 255, .18)
}

.hero-sub {
    font-size: 28px;
    letter-spacing: 2px;
    margin-bottom: 45px
}

.hero-actions {
    display: flex;
    gap: 14px
}

.hero-actions a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 48px;
    padding: 0 28px;
    border-radius: 30px;
    color: #fff;
    text-decoration: none;
    font-weight: 600
}

.primary {
    background: var(--orange);
    box-shadow: 0 10px 28px rgba(255, 106, 0, .25)
}

.ghost {
    border: 1px solid rgba(255, 255, 255, .4);
    backdrop-filter: blur(8px)
}

.hero-robot {
    position: absolute;
    z-index: 3;
    right: 3vw;
    bottom: -8px;
    width: 52%;
    height: 710px;
    display: flex;
    align-items: flex-end;
    justify-content: center
}

.robot-crop {
    position: relative;
    width: 430px;
    height: 650px;
    overflow: hidden
}

.robot-crop img {
    position: absolute;
    height: 100%;
    width: auto;
    max-width: none;
    left: 50%;
    transform: translateX(-50%)
}

.hero-robot .robot-crop img {
    height: 670px;
    left: 50%;
    transform: translateX(-50%)
}

.halo {
    position: absolute;
    width: 530px;
    height: 530px;
    border: 1px solid rgba(255, 255, 255, .33);
    border-radius: 50%;
    bottom: 56px;
    box-shadow: 0 0 90px rgba(255, 255, 255, .12), inset 0 0 50px rgba(255, 255, 255, .07)
}

.height-tag {
    position: absolute;
    right: 7%;
    top: 35%;
    display: grid;
    border-left: 1px solid rgba(255, 255, 255, .5);
    padding-left: 18px
}

.height-tag b {
    font-size: 38px
}

.height-tag span {
    font-size: 17px
}

.height-tag small {
    opacity: .6;
    margin-top: 8px
}

.hero-foot {
    position: absolute;
    z-index: 5;
    left: 7vw;
    right: 7vw;
    bottom: 28px;
    display: flex;
    gap: 55px;
    font-size: 13px;
    letter-spacing: 1px;
    opacity: .75
}

.hero-orbit {
    position: absolute;
    border: 1px solid rgba(255, 255, 255, .12);
    border-radius: 50%
}

.orbit-a {
    width: 780px;
    height: 780px;
    right: -180px;
    top: 40px
}

.orbit-b {
    width: 980px;
    height: 430px;
    right: -100px;
    bottom: -250px;
    transform: rotate(-8deg)
}

.section {
    padding: 110px 8vw
}

.section-heading {
    text-align: center;
    margin-bottom: 54px
}

.section-heading.left {
    text-align: left
}

.section-heading h2,
.overview h2 {
    font-size: 48px;
    line-height: 1.16;
    margin: 12px 0
}

.video-section {
    background: #fff
}

.video-frame {
    position: relative;
    max-width: 1180px;
    /* height: 660px; */
    margin: auto;
    overflow: hidden;
    border-radius: 6px;
    background: #e9edf1;
    box-shadow: 0 20px 60px rgba(20, 30, 42, .13)
}

.video-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 17%;
    filter: saturate(.78) brightness(.83)
}

.play {
    position: absolute;
    z-index: 3;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 82px;
    height: 82px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, .8);
    background: rgba(255, 255, 255, .18);
    color: #fff;
    font-size: 24px;
    backdrop-filter: blur(8px)
}

.video-caption {
    position: absolute;
    z-index: 3;
    left: 50px;
    bottom: 42px;
    color: #fff;
    display: grid
}

.video-caption b {
    font-size: 32px
}

.video-caption span {
    opacity: .72;
    margin-top: 8px
}

.overview {
    display: grid;
    grid-template-columns: .8fr 1.2fr;
    gap: 7vw;
    align-items: center;
    background: #f5f7fa
}

.overview-copy p {
    font-size: 17px;
    line-height: 1.95;
    color: #5d6570
}

.three-view-card {
    position: relative;
    min-height: 500px;
    background: radial-gradient(circle at 50% 45%, #fff, #e7ebef 72%);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden
}

.three-view-card:before {
    content: "";
    position: absolute;
    width: 76%;
    height: 50%;
    border: 1px solid #cad2da;
    border-radius: 50%
}

.three-view-card img {
    position: relative;
    width: 112%;
    height: auto
}

.three-view-card span {
    position: absolute;
    right: 28px;
    bottom: 23px;
    color: #8b939e;
    font-size: 12px;
    letter-spacing: 2px
}

.scenes {
    background: #fff
}

.scene-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px
}

.scene-card {
    height: 390px;
    padding: 28px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    color: #fff;
    overflow: hidden;
    position: relative;
    background-position: center;
    background-size: cover
}

.scene-card:after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(16, 25, 36, .08), rgba(12, 18, 25, .86))
}

.scene-card>* {
    position: relative;
    z-index: 2
}

.scene-no {
    font-size: 14px;
    letter-spacing: 2px;
    opacity: .8
}

.scene-card p {
    color: #fff;
    font-weight: 700
}

.scene-card h3 {
    font-size: 30px;
    color: #fff;
    margin: 8px 0 12px
}

.scene-card span {
    font-size: 13px;
    opacity: .75
}

.research {
    background-image: linear-gradient(135deg, #5f7488, #142231)
}

.guide {
    background-image: linear-gradient(135deg, #c8cdd1, #3e5262)
}

.home {
    background-image: linear-gradient(135deg, #b9a996, #434b52)
}

.industry {
    background-image: linear-gradient(135deg, #6b8894, #17252c)
}

.scene-card:before {
    content: "OMNI";
    position: absolute;
    right: -13px;
    top: 60px;
    font-size: 72px;
    font-weight: 900;
    color: rgba(255, 255, 255, .08);
    transform: rotate(90deg)
}

.highlights {
    position: relative;
    min-height: 830px;
    background: radial-gradient(circle at 50% 55%, #fff 0 13%, #edf1f5 48%, #dfe5eb 100%);
    overflow: hidden
}

.highlight-center {
    position: absolute;
    left: 50%;
    bottom: 0;
    transform: translateX(-50%);
    width: 460px;
    height: 700px
}

.highlight-center .robot-crop {
    height: 700px;
    width: 460px;
    z-index: 2
}

.rings {
    position: absolute;
    left: 50%;
    bottom: 70px;
    transform: translateX(-50%);
    width: 560px;
    height: 160px;
    border: 1px solid rgba(21, 113, 255, .35);
    border-radius: 50%;
    box-shadow: 0 0 45px rgba(21, 113, 255, .16)
}

.feature {
    position: absolute;
    width: 340px;
    display: grid;
    gap: 8px
}

.feature b {
    font-size: 25px
}

.feature span {
    font-size: 14px;
    line-height: 1.7;
    color: #68717c
}

.left-f {
    text-align: right
}

.right-f {
    text-align: left
}

.feature:after {
    content: "";
    position: absolute;
    top: 15px;
    width: 120px;
    /* border-top: 1px solid #98a4af */
}

.left-f:after {
    left: calc(100% + 22px)
}

.right-f:after {
    right: calc(100% + 22px)
}

.f1 {
    left: 9%;
    top: 240px
}

.f2 {
    left: 9%;
    top: 480px
}

.f3 {
    left: 10%;
    top: 600px
}

.f4 {
    right: 12%;
    top: 180px
}

.f5 {
    right: 12%;
    top: 390px
}

.f6 {
    right: 12%;
    top: 600px
}

.specs {
    background: #0f151e;
    color: #fff
}

.specs .section-heading h2 {
    color: #fff
}

.edition-tabs {
    display: flex;
    max-width: 1120px;
    margin: 0 auto 20px;
    border-bottom: 1px solid #39414b
}

.edition-tabs button {
    flex: 1;
    padding: 22px;
    border: 0;
    background: transparent;
    color: #7f8995;
    font-size: 22px;
    font-weight: 700
}

.edition-tabs .selected {
    color: #fff;
    border-bottom: 3px solid var(--orange)
}

.spec-panel {
    max-width: 1120px;
    margin: auto;
    display: grid;
    grid-template-columns: .42fr .68fr;
    gap: 55px;
    align-items: center;
    background: linear-gradient(145deg, #1c2531, #101720);
    padding: 45px;
    border-radius: 6px
}

.spec-robot {
    height: 500px;
    display: flex;
    justify-content: center
}

.spec-robot .robot-crop {
    height: 500px;
    width: 320px
}

.spec-list {
    display: grid;
    /* grid-template-columns: 1fr 1fr; */
    gap: 0 28px
}

.spec-list div {
    display: flex;
    justify-content: space-between;
    gap: 15px;
    padding: 17px 0;
    border-bottom: 1px solid #37404b
}

.spec-list span {
    color: #FFF;
    font-size: 16px;
    font-weight: 900;
}

.spec-list b {
    text-align: right;
    font-size: 14px;
    color: #87919e;
    font-weight: 200;
}

.spec-note {
    max-width: 1120px;
    margin: 25px auto 0;
    color: #6f7884;
    font-size: 12px
}

footer {
    background: #fff;
    padding: 70px 8vw;
    display: grid;
    grid-template-columns: 1.1fr .7fr 1.1fr 1.1fr;
    gap: 60px;
    border-top: 1px solid #e5e8eb
}

footer>div:first-child b {
    font-size: 30px
}

footer p {
    color: #69717d
}

footer h4 {
    margin-top: 0
}

footer a,
footer span {
    display: block;
    color: #68717c;
    text-decoration: none;
    margin: 12px 0;
    font-size: 14px
}

.footer-cta {
    padding: 25px;
    background: #f4f6f8
}

.footer-cta a {
    color: var(--orange);
    font-weight: 700
}

.reveal {
    opacity: 0;
    transform: translateY(20px);
    animation: rise .8s ease forwards
}

.delay {
    animation-delay: .18s
}

@keyframes rise {
    to {
        opacity: 1;
        transform: none
    }
}

@media(max-width:900px) {
    .site-header nav {
        display: none
    }
    .hero {
        padding-left: 28px;
        min-height: 760px
    }
    .hero-copy {
        width: 100%
    }
    .hero h1 {
        font-size: 62px
    }
    .hero-robot {
        opacity: .42;
        width: 80%
    }
    .overview {
        grid-template-columns: 1fr
    }
    .scene-grid {
        grid-template-columns: 1fr 1fr
    }
    .feature {
        position: relative;
        left: auto!important;
        right: auto!important;
        top: auto!important;
        text-align: left;
        margin: 22px 0
    }
    .feature:after {
        display: none
    }
    .highlights {
        padding-top: 70px
    }
    .highlight-center {
        opacity: .25
    }
    .spec-panel {
        grid-template-columns: 1fr
    }
    .spec-robot {
        display: none
    }
    footer {
        grid-template-columns: 1fr 1fr
    }
}


/* 网格布局 */

.scene-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    padding: 20px;
}


/* 卡片通用样式 */

.scene-card {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    min-height: 380px;
    /* 增加高度以容纳悬停后的长文本 */
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 24px;
    color: #fff;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    cursor: pointer;
    /* 增加手型光标暗示可交互 */
}


/* 遮罩层：悬停时加深背景遮罩，让文字更清晰 */

.scene-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    /* background: linear-gradient(to bottom, rgba(0,0,0,0.1), rgba(0,0,0,0.6)); */
    z-index: 1;
    transition: background 0.3s ease;
    /* 遮罩颜色过渡 */
}


/* 确保文字在遮罩之上 */

.scene-card>* {
    position: relative;
    z-index: 2;
}


/* 序号 */

.scene-no {
    font-size: 48px;
    font-weight: 900;
    opacity: 0.7;
    position: absolute;
    top: 20px;
    left: 24px;
    z-index: 2;
    line-height: 1;
}


/* 文本排版 */

.scene-card>div>p:first-child {
    margin: 0 0 8px 0;
    font-size: 14px;
    letter-spacing: 1px;
    opacity: 0.8;
}

.scene-card h3 {
    margin: 0 0 8px 0;
    font-size: 24px;
    transition: transform 0.3s ease;
    /* 标题微动效 */
}

.scene-card:hover h3 {
    transform: translateY(-4px);
    /* 悬停时标题轻微上移 */
}


/* 简短描述 (默认显示，悬停时隐藏) */

.scene-brief {
    display: block;
    font-size: 14px;
    opacity: 0.9;
    max-height: 40px;
    /* 配合动画 */
    overflow: hidden;
    transition: opacity 0.3s ease, max-height 0.3s ease;
}

.scene-card:hover .scene-brief {
    opacity: 0;
    max-height: 0;
    /* 悬停时折叠隐藏 */
    margin: 0;
}


/* ===== 核心功能：详细内容悬停显示 ===== */

.scene-detail {
    font-size: 14px;
    line-height: 1.6;
    margin: 8px 0 0 0;
    /* 默认状态：隐藏且向下偏移一点 */
    opacity: 0;
    max-height: 0;
    overflow: hidden;
    transform: translateY(10px);
    transition: opacity 0.4s ease, max-height 0.4s ease, transform 0.4s ease;
}


/* 悬停状态：展开显示 */

.scene-card:hover .scene-detail {
    opacity: 1;
    max-height: 200px;
    /* 给足空间展开文本 */
    transform: translateY(0);
    /* 归位 */
}


/* 视频左右布局容器 */

.video-wrapper {
    display: flex;
    justify-content: space-between;
    /* 两端对齐，中间留缝 */
    gap: 20px;
    /* 两个视频之间的间距，可根据需要调整 */
}


/* 每个视频框占一半宽度减去间距 */

.video-wrapper .video-frame {
    flex: 1;
    min-width: 0;
    /* 防止 flex 子项内容溢出 */
}

.video_zhu {
    width: 100%;
    display: block;
    outline: none;
    /* 移除点击时的黑框 */
    overflow: visible;
    /* 防止控制栏被裁切 */
    aspect-ratio: 16 / 9;
    /* 锁定视频画布比例为 16:9，防止被 poster 撑大 */
    object-fit: contain;
    /* 让封面图和视频内容适应画布，不变形 */
    background-color: #000;
    /* 封面图比例不完全匹配时，用黑色填充背景 */
}


/* 移动端适配：屏幕宽度小于 768px 时，改为上下排列 */

@media (max-width: 768px) {
    .video-wrapper {
        flex-direction: column;
        gap: 30px;
        /* 上下视频的间距 */
    }
    /* 移动端视频占满宽度 */
    .video-wrapper .video-frame {
        width: 100%;
    }
}

.demos {
    background: var(--light)
}

.section {
    padding: 110px max(7vw, 32px);
}

.section-heading.left {
    text-align: left;
    margin-left: 0;
}

.section-heading {
    max-width: 850px;
    margin: 0 auto 55px;
    text-align: center;
}

.section-heading>p {
    margin: 0 0 18px;
    color: var(--blue);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 2.4px;
}

.section-heading h2 {
    font-size: 52px;
    line-height: 1.16;
    letter-spacing: -2.4px;
    margin: 0 0 18px;
}

.section-heading span {
    display: block;
    color: #737b85;
    font-size: 15px;
    line-height: 1.85;
}

.demo-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

.demo-grid article {
    background: #fff;
    padding-bottom: 24px;
}

.demo-visual {
    aspect-ratio: 16 / 9;
    height: auto;
    position: relative;
    /* background: radial-gradient(circle at 50% 48%, rgba(0, 102, 255, .85) 0 3%, transparent 4% 17%, rgba(0, 102, 255, .2) 18% 18.5%, transparent 19%), repeating-linear-gradient(130deg, transparent 0 30px, rgba(255, 255, 255, .12) 31px 32px), #09192f; */
    height: auto;
    position: relative;
    background-image: radial-gradient(circle at 50% 50%, rgba(0, 102, 255, .85) 0 10px, transparent 11px 60px, rgba(0, 102, 255, .2) 62px 64px, transparent 66px), repeating-linear-gradient(130deg, transparent 0 30px, rgba(255, 255, 255, .12) 31px 32px);
    background-color: #09192f;
    background-repeat: no-repeat, repeat;
    background-position: center, 0 0;
    background-size: auto, 100% 200%;
    overflow: hidden;
}

.demos .demo-visual video {
    /* 确保视频元素撑满容器 */
    width: 100%;
    height: 100%;
    /* 核心修复：让视频内容等比缩放覆盖容器，裁切超出部分，杜绝露底 */
    object-fit: cover;
}

.video-number {
    position: absolute;
    top: 14px;
    left: 16px;
    color: #5c96ef;
    font-size: 10px;
    font-weight: 800;
    letter-spacing: 1.4px;
}

.demo-visual button {
    width: 54px;
    height: 54px;
    font-size: 15px;
}

.film-frame button,
.demo-visual button {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 72px;
    height: 72px;
    border-radius: 50%;
    border: 1px solid #fff;
    background: rgba(255, 255, 255, .1);
    color: #fff;
    font-size: 22px;
}

.demo-visual small {
    position: absolute;
    left: 20px;
    bottom: 18px;
    color: #fff;
    letter-spacing: 1.4px;
}

.demo-grid article>b {
    font-size: 19px;
    margin-top: 20px;
}

.demo-grid article>b,
.demo-grid article>p {
    display: block;
    margin-left: 22px;
    margin-right: 22px;
}

.demo-grid article>p {
    color: #7a8189;
    font-size: 12px;
}

.demo-grid article>b,
.demo-grid article>p {
    display: block;
    margin-left: 22px;
    margin-right: 22px;
}

p:last-child {
    margin-bottom: 0px;
}

.d2 {
    filter: hue-rotate(12deg);
}


/* 移动端适配：屏幕宽度小于 768px 时 */

@media (max-width: 768px) {
    /* 将 demo-grid 从4列改为单列布局，消除水平挤压 */
    .demos .demo-grid {
        grid-template-columns: 1fr;
        gap: 24px;
        /* 单列时卡片之间的上下间距 */
    }
    /* 确保在单列布局下，卡片宽度撑满容器 */
    .demos .demo-grid article {
        width: 100%;
    }
    /* 确保视频视觉容器在单列下宽度撑满，高度跟随 aspect-ratio 自动计算 */
    .demos .demo-visual {
        width: 100%;
    }
}


/* 移动端适配：场景应用卡片区域 */

@media (max-width: 768px) {
    /* 将 scene-grid 从4列改为单列布局 */
    .scene-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 0;
        /* 移动端去除内边距，让卡片撑满宽度 */
    }
    /* 移动端卡片高度自适应内容，不再强制最小高度 */
    .scene-card {
        min-height: auto;
        padding: 30px 24px;
        /* 调整内边距使内容不贴边 */
    }
    /* 移动端序号大小微调 */
    .scene-no {
        font-size: 36px;
    }
    /* 
     * 移动端交互优化：
     * 移动端无鼠标悬停状态，默认展示简短描述
     */
    .scene-brief {
        display: block;
        opacity: 0.9;
        max-height: 40px;
    }
    /* 
     * 移动端交互优化：
     * 详细内容默认隐藏，用户可通过点击卡片展开查看
     * 如果希望移动端直接全部展开显示，可将下面的 opacity 和 max-height 改为 1 和 200px
     */
    .scene-detail {
        opacity: 0;
        max-height: 0;
    }
    /* 点击卡片时展开详细内容（需配合触控交互） */
    .scene-card:active .scene-detail,
    .scene-card:focus-within .scene-detail {
        opacity: 1;
        max-height: 200px;
        transform: translateY(0);
    }
}