/* ========== 主题变量 ========== */
:root {
    --c-bg: #fafbfd;
    --c-bg-alt: #eef3fa;
    --c-text: #0b1e3a;
    --c-text-soft: #4b5b78;
    --c-primary: #061a35;
    --c-primary-2: #0c2a5e;
    --c-steel: #1e3a5f;
    --c-accent: #1e40af;
    --c-cyan: #5fb8e8;
    --c-gold: #c9a14e;
    --c-border: #d8e1ee;
    --c-grid: rgba(30, 58, 95, .07);
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, .05);
    --shadow-md: 0 16px 40px rgba(13, 39, 80, .10);
    --shadow-lg: 0 24px 60px rgba(13, 39, 80, .14);
    --shadow-glow: 0 0 0 1px rgba(95, 184, 232, .18), 0 22px 50px rgba(6, 26, 53, .22);
    --radius: 12px;
    --maxw: 1240px;
    --header-h: 88px;
}
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

/* Bootstrap Icons via mask-image：颜色 = 当前 currentColor，尺寸 = 1em */
.bi {
    display: inline-block; width: 1em; height: 1em;
    background-color: currentColor;
    -webkit-mask: var(--ico) center / contain no-repeat;
            mask: var(--ico) center / contain no-repeat;
    vertical-align: -.125em; flex: none;
}
html { scroll-behavior: smooth; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    color: var(--c-text);
    background: var(--c-bg);
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: var(--c-accent); text-decoration: none; transition: color .2s; }
a:hover { color: var(--c-primary); }
h1, h2, h3, h4 { color: var(--c-primary); margin: 0 0 .6em; line-height: 1.3; font-weight: 600; letter-spacing: .5px; }
p { margin: 0 0 1em; color: var(--c-text-soft); }
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; width: 100%; }

/* 全局背景：极淡科技网格 */
body::before {
    content: ''; position: fixed; inset: 0; z-index: -2; pointer-events: none;
    background-image:
        linear-gradient(var(--c-grid) 1px, transparent 1px),
        linear-gradient(90deg, var(--c-grid) 1px, transparent 1px);
    background-size: 56px 56px;
    mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 90%);
}

/* ========== 页眉 ========== */
.site-header {
    position: sticky; top: 0; z-index: 1030; height: var(--header-h);
    background: rgba(255, 255, 255, .92);
    backdrop-filter: saturate(180%) blur(18px);
    -webkit-backdrop-filter: saturate(180%) blur(18px);
    border-bottom: 1px solid var(--c-border);
    box-shadow: 0 1px 0 rgba(255, 255, 255, .6) inset, 0 8px 24px rgba(6, 26, 53, .04);
}
/* 顶部金属细线，强化商务质感 */
.site-header::before {
    content: ''; position: absolute; left: 0; right: 0; top: 0; height: 2px;
    background: linear-gradient(90deg,
        transparent 0%,
        var(--c-accent) 18%,
        var(--c-gold) 50%,
        var(--c-accent) 82%,
        transparent 100%);
    opacity: .55;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.brand { display: flex; align-items: center; gap: 16px; }
.brand-logo {
    width: 52px; height: 52px; object-fit: contain;
    filter: drop-shadow(0 4px 14px rgba(6, 26, 53, .28));
}
.brand-text { display: flex; flex-direction: column; line-height: 1.2; padding-left: 14px; border-left: 1px solid var(--c-border); }
.brand-text strong {
    font-size: 20px; letter-spacing: 3px; font-weight: 700;
    color: var(--c-primary);
    -webkit-background-clip: initial; background-clip: initial;
}
.brand-text em {
    font-size: 11px; color: var(--c-text-soft); font-style: normal;
    letter-spacing: 2px; margin-top: 2px; text-transform: uppercase;
    font-family: "JetBrains Mono", Consolas, monospace;
}
.site-nav { display: flex; gap: 2px; align-items: center; }
.nav-link {
    padding: 12px 22px; font-size: 14px;
    color: var(--c-text); position: relative; transition: color .25s;
    font-weight: 500; letter-spacing: 2px;
}
.nav-link::after {
    content: ''; position: absolute; left: 22px; right: 22px; bottom: 6px;
    height: 2px; background: var(--c-accent);
    transform: scaleX(0); transform-origin: left center;
    transition: transform .3s ease;
}
.nav-link:hover { color: var(--c-accent); }
.nav-link:hover::after { transform: scaleX(.6); }
.nav-link.is-active { color: var(--c-primary); font-weight: 600; }
.nav-link.is-active::after {
    transform: scaleX(1);
    background: linear-gradient(90deg, var(--c-accent), var(--c-gold));
    box-shadow: 0 4px 10px rgba(30, 64, 175, .25);
}
.nav-toggle { display: none; background: none; border: 0; padding: 8px; cursor: pointer; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--c-primary); margin: 5px 0; border-radius: 2px; }

/* ========== Hero ========== */
.hero {
    position: relative; padding: 130px 0 110px; overflow: hidden;
    color: #e6f2ff; min-height: 640px;
    background-color: #061a35;
}
.hero-bg {
    position: absolute; inset: 0; pointer-events: none;
    background: url('../images/bg/hero.jpg') center/cover no-repeat;
    opacity: .42; transform: scale(1.05);
    transition: transform 1.2s ease;
}
.hero:hover .hero-bg { transform: scale(1.08); }
.hero::before {
    content: ''; position: absolute; inset: 0; pointer-events: none;
    background:
        radial-gradient(900px 500px at 80% -10%, rgba(95, 184, 232, .18), transparent 65%),
        radial-gradient(900px 500px at -10% 110%, rgba(30, 64, 175, .35), transparent 65%),
        linear-gradient(180deg, rgba(3, 14, 30, .92) 0%, rgba(6, 26, 53, .92) 55%, rgba(10, 31, 68, .94) 100%);
}
.hero canvas.particles { position: absolute; inset: 0; width: 100%; height: 100%; opacity: .35; z-index: 2; pointer-events: none; }
.hero .three-scene { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 1; pointer-events: none; opacity: .80; }
.hero .three-scene canvas { display: block; width: 100% !important; height: 100% !important; }
.hero .container { position: relative; z-index: 3; }
.hero .eyebrow { color: #cfe7fb; border-color: rgba(207, 231, 251, .25); background: rgba(255, 255, 255, .04); }
.hero h1 {
    color: #fff; font-size: clamp(34px, 5vw, 60px); margin: 18px 0 22px; font-weight: 700;
    text-shadow: 0 6px 28px rgba(3, 14, 30, .55); letter-spacing: 2px;
}
.hero h1 .grad {
    background: linear-gradient(90deg, #ffffff 0%, #cfe7fb 55%, #c9a14e 100%);
    -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero .lead {
    color: rgba(230, 242, 255, .92); font-size: clamp(16px, 1.6vw, 19px);
    max-width: 760px; line-height: 1.85;
}
.typewriter { color: #7dd3fc; font-family: "JetBrains Mono", Consolas, monospace; }
.typewriter::after { content: '_'; animation: blink 1s steps(1) infinite; color: #7dd3fc; }
@keyframes blink { 50% { opacity: 0; } }

/* 角标装饰 */
.corner { position: absolute; width: 28px; height: 28px; border: 1px solid rgba(201, 161, 78, .55); pointer-events: none; }
.corner.tl { top: 24px; left: 24px; border-right: 0; border-bottom: 0; }
.corner.tr { top: 24px; right: 24px; border-left: 0; border-bottom: 0; }
.corner.bl { bottom: 24px; left: 24px; border-right: 0; border-top: 0; }
.corner.br { bottom: 24px; right: 24px; border-left: 0; border-top: 0; }


/* ========== 按钮 ========== */
.btn-tech {
    display: inline-flex; align-items: center; gap: 10px;
    padding: 14px 30px; border-radius: 999px; font-size: 15px; font-weight: 500;
    border: 1px solid transparent; cursor: pointer; transition: all .3s;
    position: relative; overflow: hidden; letter-spacing: 1px;
}
.btn-tech.is-primary {
    color: #fff;
    background: linear-gradient(135deg, var(--c-primary-2) 0%, var(--c-accent) 100%);
    box-shadow: 0 14px 32px rgba(6, 26, 53, .38), inset 0 1px 0 rgba(255, 255, 255, .12);
}
.btn-tech.is-primary:hover { transform: translateY(-3px); box-shadow: 0 20px 44px rgba(6, 26, 53, .48), inset 0 1px 0 rgba(255, 255, 255, .18); color: #fff; }
.btn-tech.is-ghost {
    color: #e6f2ff; background: rgba(255,255,255,.06);
    border-color: rgba(125, 211, 252, .45); backdrop-filter: blur(6px);
}
.btn-tech.is-ghost:hover { background: rgba(125, 211, 252, .14); color: #fff; transform: translateY(-3px); }
.btn-tech.is-outline {
    color: var(--c-primary); background: #fff;
    border-color: var(--c-border);
}
.btn-tech.is-outline:hover { color: var(--c-accent); border-color: var(--c-accent); transform: translateY(-3px); box-shadow: var(--shadow-md); }
.btn-tech::before {
    content: ''; position: absolute; top: 0; left: -120%;
    width: 60%; height: 100%; transform: skewX(-20deg);
    background: linear-gradient(90deg, transparent, rgba(255,255,255,.3), transparent);
    transition: left .7s;
}
.btn-tech:hover::before { left: 130%; }

/* ========== 数字指标条 ========== */
.metrics {
    margin-top: 64px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
    position: relative; z-index: 2;
}
.metric {
    text-align: center; padding: 26px 12px; border-radius: 4px;
    background: rgba(255,255,255,.04); border: 1px solid rgba(207, 231, 251, .14);
    backdrop-filter: blur(8px); position: relative; overflow: hidden;
    transition: transform .3s, border-color .3s, background .3s;
}
.metric:hover { transform: translateY(-4px); border-color: rgba(201, 161, 78, .35); background: rgba(255,255,255,.06); }
.metric::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
    background: linear-gradient(90deg, transparent, rgba(201, 161, 78, .55), transparent);
}
.metric .num {
    font-size: clamp(28px, 3.4vw, 40px); font-weight: 700; letter-spacing: 1px;
    background: linear-gradient(180deg, #ffffff 0%, #cfe7fb 100%);
    -webkit-background-clip: text; background-clip: text; color: transparent;
    font-family: "JetBrains Mono", Consolas, monospace;
}
.metric .label { font-size: 12px; color: rgba(230,242,255,.65); margin-top: 6px; letter-spacing: 2px; }

/* ========== 通用 section ========== */
.section { padding: 110px 0; position: relative; }
.section-alt { background: linear-gradient(180deg, var(--c-bg) 0%, var(--c-bg-alt) 100%); }
.section-dark {
    color: #e6f2ff; background-color: #061a35;
    background-image:
        radial-gradient(700px 360px at 20% 10%, rgba(95, 184, 232, .10), transparent 65%),
        radial-gradient(800px 400px at 85% 95%, rgba(30, 64, 175, .22), transparent 65%),
        linear-gradient(180deg, #061a35 0%, #08213f 100%);
}
.section-dark::before {
    content: ''; position: absolute; left: 0; right: 0; top: 0; height: 1px;
    background: linear-gradient(90deg, transparent, rgba(201, 161, 78, .35) 50%, transparent);
    pointer-events: none;
}
.section-dark h2 { color: #fff; }
.section-dark p { color: rgba(230, 242, 255, .80); }
.section-dark .eyebrow { color: #cfe7fb; border-color: rgba(207, 231, 251, .25); background: rgba(255, 255, 255, .04); }
/* 深色区里的白底卡片需要恢复深色文字，避免白字白底不可见 */
.section-dark .tech-card h3 { color: var(--c-primary); }
.section-dark .tech-card p,
.section-dark .tech-card .lead { color: var(--c-text-soft); }
.section-dark .tech-card .more { color: var(--c-accent); }

.section-head { text-align: center; margin-bottom: 64px; }
.section-head h2 { font-size: clamp(28px, 3.2vw, 40px); margin-bottom: 16px; }
.section-head h2 .grad {
    background: linear-gradient(90deg, var(--c-primary-2) 0%, var(--c-accent) 60%, var(--c-gold) 100%);
    -webkit-background-clip: text; background-clip: text; color: transparent;
}
.section-head .lead { max-width: 720px; margin: 0 auto; color: var(--c-text-soft); font-size: 16px; }
.section-head .divider {
    width: 56px; height: 2px; margin: 18px auto 22px;
    background: linear-gradient(90deg, var(--c-accent) 0%, var(--c-gold) 100%);
    border-radius: 2px;
}
.eyebrow {
    display: inline-block; font-size: 11px; letter-spacing: 6px;
    color: var(--c-accent); text-transform: uppercase; margin-bottom: 4px;
    padding: 6px 16px; border: 1px solid rgba(30, 64, 175, .22);
    border-radius: 2px; background: rgba(30, 64, 175, .04); font-weight: 600;
}

/* ========== 卡片 ========== */
.tech-card {
    position: relative; background: #fff; border: 1px solid var(--c-border);
    border-radius: var(--radius); padding: 32px; height: 100%;
    box-shadow: var(--shadow-sm); transition: transform .35s, box-shadow .35s, border-color .35s;
    overflow: hidden;
}
.tech-card::before {
    content: ''; position: absolute; inset: -1px; border-radius: inherit;
    padding: 1px; background: linear-gradient(135deg, transparent 30%, var(--c-cyan) 50%, transparent 70%);
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor; mask-composite: exclude;
    opacity: 0; transition: opacity .35s; pointer-events: none;
}
.tech-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-glow); border-color: transparent; }
.tech-card:hover::before { opacity: 1; }

/* 3D Tilt：开启 perspective，悬停时由 JS 接管 transform，并叠加光斑 */
.tilt-on { transform-style: preserve-3d; will-change: transform; }
.tech-card.tilt-on {
    --tilt-x: 0deg; --tilt-y: 0deg; --glow-x: 50%; --glow-y: 50%;
    transition: transform .25s ease, box-shadow .35s, border-color .35s;
}
.tech-card.tilt-on.is-tilting {
    transform: perspective(900px) rotateX(var(--tilt-x)) rotateY(var(--tilt-y)) translateY(-6px);
    transition: transform .08s linear, box-shadow .35s, border-color .35s;
}
.tech-card.tilt-on::after {
    content: ''; position: absolute; inset: 0; border-radius: inherit; pointer-events: none;
    background: radial-gradient(220px circle at var(--glow-x) var(--glow-y),
        rgba(125, 211, 252, .22), transparent 60%);
    opacity: 0; transition: opacity .35s; z-index: 1;
}
.tech-card.tilt-on.is-tilting::after { opacity: 1; }
.tech-card.tilt-on > * { position: relative; z-index: 2; }
.tech-card h3 { font-size: 19px; }
.tech-card .icon {
    width: 56px; height: 56px; border-radius: 10px;
    background: linear-gradient(135deg, var(--c-primary-2) 0%, var(--c-accent) 100%);
    color: #fff; display: inline-flex; align-items: center; justify-content: center;
    font-size: 26px; margin-bottom: 22px;
    box-shadow: 0 10px 24px rgba(6, 26, 53, .28), inset 0 1px 0 rgba(255, 255, 255, .14);
    position: relative;
}
.tech-card .icon::after {
    content: ''; position: absolute; right: -3px; top: -3px;
    width: 10px; height: 10px; background: var(--c-gold); border-radius: 2px;
    box-shadow: 0 2px 6px rgba(201, 161, 78, .45);
}
.tech-card .idx {
    position: absolute; top: 22px; right: 26px;
    font-size: 38px; font-weight: 800; color: rgba(13, 39, 80, .06);
    font-family: "JetBrains Mono", Consolas, monospace; letter-spacing: -2px;
}


/* ========== 行业 / 服务对象 ========== */
.industry-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.industry-item {
    position: relative; padding: 28px 18px; text-align: center;
    background: #fff; border: 1px solid var(--c-border); border-radius: 12px;
    transition: all .3s; cursor: default;
}
.industry-item:hover {
    transform: translateY(-4px); border-color: var(--c-accent);
    box-shadow: 0 14px 30px rgba(13, 39, 80, .10);
}
.industry-item .ico {
    width: 52px; height: 52px; margin: 0 auto 14px;
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(29,78,216,.10), rgba(56,189,248,.20));
    color: var(--c-accent);
    display: inline-flex; align-items: center; justify-content: center; font-size: 24px;
    transition: all .3s;
}
.industry-item:hover .ico {
    background: linear-gradient(135deg, var(--c-accent), var(--c-cyan));
    color: #fff; transform: rotateY(180deg);
}
.industry-item .name { font-weight: 600; color: var(--c-primary); font-size: 15px; letter-spacing: 1px; }
.industry-item .desc { font-size: 12px; color: var(--c-text-soft); margin-top: 4px; letter-spacing: .5px; }

/* ========== 技术栈 ========== */
.stack-row { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.stack-card {
    background: rgba(255,255,255,.04); border: 1px solid rgba(125, 211, 252, .18);
    border-radius: 14px; padding: 28px;
    backdrop-filter: blur(8px); position: relative; overflow: hidden;
}
.stack-card .head { display: flex; align-items: center; gap: 14px; margin-bottom: 18px; }
.stack-card .head .ico {
    width: 44px; height: 44px; border-radius: 10px;
    background: linear-gradient(135deg, var(--c-accent), var(--c-cyan));
    display: inline-flex; align-items: center; justify-content: center; color: #fff; font-size: 22px;
}
.stack-card .head h3 { color: #fff; margin: 0; font-size: 18px; letter-spacing: 1px; }
.stack-card .tags { display: flex; flex-wrap: wrap; gap: 8px; }
.stack-card .tag {
    padding: 6px 12px; border-radius: 999px; font-size: 13px;
    background: rgba(125, 211, 252, .10); color: #cfe7fb;
    border: 1px solid rgba(125, 211, 252, .25); transition: all .25s;
}
.stack-card .tag:hover { background: rgba(125, 211, 252, .22); color: #fff; }

/* ========== 公司理念条 ========== */
.philosophy {
    position: relative; padding: 80px 0; color: #e6f2ff; overflow: hidden;
    background:
        radial-gradient(700px 300px at 50% 50%, rgba(56,189,248,.20), transparent 70%),
        linear-gradient(90deg, #061a35, #0a2853);
}
.philosophy::before {
    content: ''; position: absolute; inset: 0; pointer-events: none;
    background-image:
        linear-gradient(rgba(125, 211, 252, .08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(125, 211, 252, .08) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse 60% 80% at 50% 50%, #000, transparent 80%);
}
.philosophy .container { position: relative; }
.philosophy .quote {
    text-align: center; font-size: clamp(20px, 2.6vw, 30px);
    letter-spacing: 8px; font-weight: 500;
}
.philosophy .quote span {
    display: inline-block; padding: 0 22px; position: relative;
    background: linear-gradient(180deg, #fff, #7dd3fc);
    -webkit-background-clip: text; background-clip: text; color: transparent;
}
.philosophy .quote span + span::before {
    content: '◆'; position: absolute; left: -8px; color: rgba(125, 211, 252, .55);
    font-size: 10px; top: 50%; transform: translateY(-50%);
}
.philosophy .sub {
    text-align: center; margin-top: 22px; color: rgba(230, 242, 255, .65);
    font-size: 14px; letter-spacing: 4px;
}

/* ========== 时间线 ========== */
.timeline { position: relative; padding-left: 32px; }
.timeline::before {
    content: ''; position: absolute; left: 9px; top: 6px; bottom: 6px; width: 2px;
    background: linear-gradient(180deg, var(--c-accent), var(--c-cyan));
}
.timeline-item { position: relative; padding: 0 0 28px 0; }
.timeline-item::before {
    content: ''; position: absolute; left: -29px; top: 8px; width: 16px; height: 16px; border-radius: 50%;
    background: #fff; border: 2px solid var(--c-accent);
    box-shadow: 0 0 0 5px rgba(29, 78, 216, .12);
}
.timeline-item h3 { font-size: 17px; margin-bottom: 6px; }

/* ========== 产品 3D 大屏（无人机 / 虚拟宠物 / 社会模拟 共享骨架） ========== */
.drone-section, .stage-section { padding: 110px 0 120px; }
.drone-tabs, .stage-tabs {
    display: flex; gap: 12px; align-items: center; flex-wrap: wrap;
    margin: 0 0 24px;
}
.drone-tab, .stage-tab {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 10px 22px; font-size: 14px; letter-spacing: 1px;
    border-radius: 999px; cursor: pointer;
    color: #cfe7fb; background: rgba(125, 211, 252, .08);
    border: 1px solid rgba(125, 211, 252, .25);
    transition: all .25s;
}
.drone-tab:hover, .stage-tab:hover { background: rgba(125, 211, 252, .16); color: #fff; }
.drone-tab.is-active, .stage-tab.is-active {
    color: #fff; border-color: transparent;
    background: linear-gradient(90deg, var(--c-accent), var(--c-cyan));
    box-shadow: 0 10px 24px rgba(29, 78, 216, .35);
}
.drone-theme, .stage-theme {
    margin-left: auto; font-family: "JetBrains Mono", Consolas, monospace;
    color: #7dd3fc; font-size: 13px; letter-spacing: 2px;
}
.drone-stage, .stage-stage {
    position: relative; height: 560px; border-radius: 18px; overflow: hidden;
    background:
        radial-gradient(800px 400px at 50% 110%, rgba(29,78,216,.40), transparent 70%),
        linear-gradient(180deg, #061a35 0%, #04122a 100%);
    border: 1px solid rgba(125, 211, 252, .22);
    box-shadow: 0 0 0 1px rgba(56,189,248,.10), 0 30px 70px rgba(0, 0, 0, .45);
}
.drone-canvas, .stage-canvas { position: absolute; inset: 0; }
.drone-canvas canvas, .stage-canvas canvas { display: block; width: 100% !important; height: 100% !important; }
.drone-stage .corner, .stage-stage .corner { border-color: rgba(125, 211, 252, .65); }

.drone-hud, .stage-hud {
    position: absolute; z-index: 2; min-width: 200px;
    padding: 14px 16px; border-radius: 10px;
    background: rgba(6, 22, 46, .55); backdrop-filter: blur(8px);
    border: 1px solid rgba(125, 211, 252, .25);
    color: #cfe7fb; font-size: 13px; letter-spacing: .5px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, .35);
}
.drone-hud.hud-tl, .stage-hud.hud-tl { top: 22px; left: 22px; }
.drone-hud.hud-tr, .stage-hud.hud-tr { top: 22px; right: 22px; }
.drone-hud.hud-bl, .stage-hud.hud-bl { bottom: 22px; left: 22px; }
.drone-hud.hud-br, .stage-hud.hud-br { bottom: 22px; right: 22px; }
.drone-hud .hud-title, .stage-hud .hud-title {
    color: #fff; font-size: 13px; letter-spacing: 2px; margin-bottom: 10px;
    padding-bottom: 8px; border-bottom: 1px solid rgba(125, 211, 252, .22);
    display: flex; align-items: center; gap: 8px;
}
.drone-hud .hud-title i, .stage-hud .hud-title i { color: #7dd3fc; }
.drone-hud .hud-row, .stage-hud .hud-row { display: flex; justify-content: space-between; gap: 18px; padding: 4px 0; }
.drone-hud .hud-row span, .stage-hud .hud-row span { color: rgba(207, 231, 251, .72); }
.drone-hud .hud-row b, .stage-hud .hud-row b {
    color: #fff; font-weight: 600;
    font-family: "JetBrains Mono", Consolas, monospace;
}
.drone-hud .hud-row b.warn, .stage-hud .hud-row b.warn { color: #fca5a5; }
.drone-hud .hud-row b.ok,   .stage-hud .hud-row b.ok   { color: #34d399; }
.drone-hud .hud-list > div, .stage-hud .hud-list > div { padding: 4px 0; display: flex; align-items: center; gap: 8px; }
.drone-hud .dot, .stage-hud .dot {
    display: inline-block; width: 8px; height: 8px; border-radius: 50%;
    box-shadow: 0 0 8px currentColor;
}
.drone-hud .dot-cyan, .stage-hud .dot-cyan { background: #22d3ee; color: #22d3ee; }
.drone-hud .dot-gold, .stage-hud .dot-gold { background: #fbbf24; color: #fbbf24; }
.drone-hud .dot-pink, .stage-hud .dot-pink { background: #f472b6; color: #f472b6; }
.drone-hud .dot-violet, .stage-hud .dot-violet { background: #a78bfa; color: #a78bfa; }
.drone-hud .hud-tags, .stage-hud .hud-tags { display: flex; flex-wrap: wrap; gap: 6px; max-width: 220px; }
.drone-hud .hud-tags span, .stage-hud .hud-tags span {
    padding: 3px 10px; font-size: 12px; border-radius: 999px;
    background: rgba(125, 211, 252, .10); border: 1px solid rgba(125, 211, 252, .25);
    color: #cfe7fb;
}
/* 主题色微调：浅色 section 用更深底色让 HUD 仍然可读 */
.section-light .stage-stage {
    background:
        radial-gradient(800px 400px at 50% 110%, rgba(29,78,216,.30), transparent 70%),
        linear-gradient(180deg, #0a2853 0%, #061a35 100%);
}
@media (max-width: 991.98px) {
    .drone-stage, .stage-stage { height: 480px; }
    .drone-hud, .stage-hud { min-width: 0; padding: 10px 12px; font-size: 12px; }
    .drone-hud.hud-tr, .drone-hud.hud-br,
    .stage-hud.hud-tr, .stage-hud.hud-br { display: none; }
}
@media (max-width: 767.98px) {
    .drone-stage, .stage-stage { height: 380px; }
    .drone-hud.hud-bl, .stage-hud.hud-bl { display: none; }
    .drone-hud.hud-tl, .stage-hud.hud-tl { left: 12px; top: 12px; }
}

/* ========== 案例场景卡 ========== */
.scene-card {
    position: relative; border-radius: 16px; overflow: hidden;
    height: 320px; display: flex; align-items: flex-end;
    box-shadow: var(--shadow-md); transition: transform .35s;
}
.scene-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.scene-card .bg { position: absolute; inset: 0; background-size: cover; background-position: center;
    transition: transform .8s; }
.scene-card:hover .bg { transform: scale(1.08); }
.scene-card::after {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(180deg, transparent 30%, rgba(6, 26, 53, .92) 100%);
}
.scene-card .info { position: relative; z-index: 2; padding: 28px; color: #fff; }
.scene-card .info .tag {
    display: inline-block; padding: 4px 12px; border-radius: 999px;
    background: rgba(56, 189, 248, .25); border: 1px solid rgba(125, 211, 252, .45);
    color: #e6f2ff; font-size: 12px; letter-spacing: 2px; margin-bottom: 10px;
}
.scene-card .info h3 { color: #fff; margin: 0 0 6px; font-size: 20px; }
.scene-card .info p { color: rgba(230, 242, 255, .80); margin: 0; font-size: 14px; }


/* ========== CTA 横幅 ========== */
.cta-banner {
    position: relative; overflow: hidden;
    background:
        linear-gradient(135deg, rgba(10, 31, 68, .92), rgba(11, 58, 120, .92)),
        url('../images/bg/network.jpg') center/cover no-repeat;
    color: #fff; padding: 80px 0;
}
.cta-banner::before {
    content: ''; position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(125, 211, 252, .07) 1px, transparent 1px),
        linear-gradient(90deg, rgba(125, 211, 252, .07) 1px, transparent 1px);
    background-size: 40px 40px;
    mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, #000, transparent 80%);
}
.cta-banner .container { position: relative; display: flex; justify-content: space-between; align-items: center; gap: 32px; flex-wrap: wrap; }
.cta-banner h2 { color: #fff; margin: 0 0 8px; font-size: clamp(22px, 2.6vw, 32px); }
.cta-banner p { color: rgba(230, 242, 255, .82); margin: 0; }

/* ========== 联系页 ========== */
.contact-card {
    background: #fff; border: 1px solid var(--c-border); border-radius: var(--radius);
    padding: 36px; position: relative; overflow: hidden; height: 100%;
}
.contact-card::after {
    content: ''; position: absolute; top: -50%; right: -50%; width: 200%; height: 200%;
    background: radial-gradient(circle, rgba(56,189,248,.08), transparent 50%);
    pointer-events: none;
}
.contact-card h3 { font-size: 20px; margin-bottom: 20px; position: relative; padding-left: 14px; }
.contact-card h3::before {
    content: ''; position: absolute; left: 0; top: 8px; bottom: 8px; width: 4px; border-radius: 2px;
    background: linear-gradient(180deg, var(--c-accent), var(--c-cyan));
}
.contact-item { display: flex; gap: 14px; align-items: flex-start; padding: 16px 0;
    border-bottom: 1px dashed var(--c-border); position: relative; }
.contact-item:last-child { border-bottom: 0; }
.contact-item .label { color: var(--c-text-soft); min-width: 76px; display: flex; align-items: center; gap: 6px; }
.contact-item .value { color: var(--c-primary); font-weight: 500; }
.contact-qr { text-align: center; }
.contact-qr img { width: 220px; margin: 0 auto 14px; border: 1px solid var(--c-border);
    border-radius: 14px; padding: 10px; background: #fff;
    box-shadow: 0 8px 24px rgba(13, 39, 80, .08); }

/* ========== 浮动联系按钮 ========== */
.float-contact {
    position: fixed; right: 22px; bottom: 28px; z-index: 1020;
    width: 54px; height: 54px; border-radius: 50%;
    background: linear-gradient(135deg, var(--c-accent), var(--c-cyan));
    color: #fff; display: flex; align-items: center; justify-content: center;
    box-shadow: 0 12px 28px rgba(29, 78, 216, .45); cursor: pointer;
    transition: transform .25s; font-size: 22px;
}
.float-contact:hover { transform: translateY(-3px) scale(1.06); color: #fff; }
.float-contact::after {
    content: ''; position: absolute; inset: -6px; border-radius: 50%;
    border: 1px solid rgba(56, 189, 248, .55);
    animation: pulse 1.8s ease-out infinite;
}
@keyframes pulse {
    0% { transform: scale(.95); opacity: .8; }
    100% { transform: scale(1.4); opacity: 0; }
}

/* ========== 页脚 ========== */
.site-footer {
    position: relative; color: #cbd5e1; margin-top: 0;
    background:
        radial-gradient(800px 300px at 50% 0%, rgba(56,189,248,.10), transparent 70%),
        linear-gradient(180deg, #061a35, #04132a);
}
.site-footer::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
    background: linear-gradient(90deg, transparent, var(--c-cyan), transparent);
    opacity: .55;
}
.footer-grid { display: grid; grid-template-columns: 2.2fr 1fr 1fr 1.1fr; gap: 40px; padding: 72px 0 36px; }
.footer-col h4 { color: #fff; font-size: 15px; margin-bottom: 20px; letter-spacing: 2px;
    position: relative; padding-bottom: 10px; }
.footer-col h4::after {
    content: ''; position: absolute; left: 0; bottom: 0; width: 30px; height: 2px;
    background: linear-gradient(90deg, var(--c-accent), var(--c-cyan));
}
.footer-logo { width: 50px; margin-bottom: 16px; filter: drop-shadow(0 2px 8px rgba(56,189,248,.4)); }
.footer-brand-name { color: #fff; font-weight: 700; font-size: 17px; letter-spacing: 2px; margin-bottom: 8px; }
.footer-slogan { color: #fff; letter-spacing: 3px; margin-bottom: 14px; font-size: 14px; }
.footer-desc { color: #94a3b8; font-size: 13px; line-height: 1.8; }
.footer-list { list-style: none; padding: 0; margin: 0; font-size: 14px; }
.footer-list li { margin-bottom: 12px; display: flex; gap: 10px; align-items: center; color: #cbd5e1; }
.footer-list li i { color: var(--c-cyan); font-size: 16px; }
.footer-list a { color: #cbd5e1; }
.footer-list a:hover { color: #7dd3fc; }
.footer-qr .qrcode { width: 138px; border-radius: 12px; background: #fff; padding: 8px;
    box-shadow: 0 0 0 1px rgba(125, 211, 252, .3), 0 8px 24px rgba(0, 0, 0, .35); }
.footer-qr .qrtip { color: #94a3b8; font-size: 12px; margin-top: 10px; letter-spacing: 1px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.06); padding: 20px 0; font-size: 13px; }
.footer-bottom-inner { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.footer-bottom a { color: #94a3b8; }
.footer-bottom a:hover { color: #7dd3fc; }

/* ========== 动效 ========== */
.fade-in { opacity: 0; transform: translateY(20px); transition: opacity .8s ease, transform .8s ease; }
.fade-in.is-visible { opacity: 1; transform: none; }
.fade-in.delay-1 { transition-delay: .1s; }
.fade-in.delay-2 { transition-delay: .2s; }
.fade-in.delay-3 { transition-delay: .3s; }
.fade-in.delay-4 { transition-delay: .4s; }

/* Layui 图标尺寸跟随父级 */
.layui-icon { font-size: inherit; line-height: 1; }

/* ========== 响应式 ========== */
@media (max-width: 1199.98px) {
    .industry-grid { grid-template-columns: repeat(3, 1fr); }
    .footer-grid { grid-template-columns: 1.5fr 1fr 1fr; }
    .footer-qr { grid-column: span 3; text-align: left; }
    .footer-qr .qrcode { margin: 0; }
}
@media (max-width: 991.98px) {
    .metrics { grid-template-columns: repeat(2, 1fr); }
    .industry-grid { grid-template-columns: repeat(2, 1fr); }
    .stack-row { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    .footer-qr { grid-column: span 2; }
    .section { padding: 80px 0; }
}
@media (max-width: 767.98px) {
    .footer-grid { grid-template-columns: 1fr; }
    .footer-qr { grid-column: span 1; }
    .nav-toggle { display: block; }
    .site-nav {
        position: absolute; top: var(--header-h); left: 0; right: 0;
        flex-direction: column; gap: 0; background: #fff;
        border-bottom: 1px solid var(--c-border);
        max-height: 0; overflow: hidden; transition: max-height .3s;
    }
    .site-nav.is-open { max-height: 460px; padding: 8px 0; }
    .nav-link { padding: 14px 24px; border-radius: 0; width: 100%; text-align: center; }
    .section { padding: 64px 0; }
    .hero { padding: 100px 0 80px; min-height: auto; }
    .philosophy .quote { letter-spacing: 4px; }
    .cta-banner .container { justify-content: center; text-align: center; }
}