:root{
  --bg:#f5f5f2;
  --ink:#0a0b0d;
  --muted:#6f7278;
  --line:rgba(10,11,13,.14);
  --blue:#2b66e9;
  --cyan:#47e9ff;
  --gold:#c5a05a;
  --dark:#07090c;
  --dark2:#0c1015;
  --glass:rgba(255,255,255,.72);
  --radius:18px;
  --max:1440px;
  --pad:clamp(20px,4vw,72px);
  --ease:cubic-bezier(.22,.72,.18,1);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;background:var(--dark)}
body{margin:0;font-family:Inter,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:hidden}
body.menu-open{overflow:hidden}
a{color:inherit;text-decoration:none}
img,video{display:block;width:100%}
button{font:inherit}
::selection{background:var(--blue);color:#fff}
.container{width:min(var(--max),calc(100% - var(--pad)*2));margin:auto}
.section{padding:clamp(92px,11vw,180px) 0;background:var(--bg)}
.section-dark{position:relative;padding:clamp(96px,12vw,190px) 0;background:var(--dark);color:#f5f7fa;overflow:hidden}
.section-muted{padding:clamp(96px,12vw,180px) 0;background:#ecece8}
.section-kicker{font-size:11px;font-weight:800;letter-spacing:.18em;color:#6b7078;text-transform:uppercase}
.section-kicker.light{color:#99a4b2}
h1,h2,h3,p{margin:0}
h1,h2,h3{letter-spacing:-.045em;font-weight:600}
h2{font-size:clamp(30px,3vw,38px);line-height:1.08}
p{font-size:clamp(17px,1.35vw,22px);line-height:1.7;color:#60646b}
.section-dark p{color:#a7b0ba}

.scroll-progress{position:fixed;top:0;left:0;right:0;height:2px;z-index:200;background:transparent;pointer-events:none}.scroll-progress span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--blue),var(--cyan));box-shadow:0 0 16px rgba(71,233,255,.7)}
.cursor-dot,.cursor-ring{display:none!important}.cursor-dot{width:5px;height:5px;background:#fff;mix-blend-mode:difference}.cursor-ring{width:38px;height:38px;border:1px solid rgba(255,255,255,.8);mix-blend-mode:difference;transition:width .25s,height .25s,opacity .25s}.cursor-ring.active{width:64px;height:64px}

.site-header{position:fixed;z-index:150;top:0;left:0;right:0;height:84px;padding:0 clamp(22px,3vw,52px);display:flex;align-items:center;justify-content:space-between;color:#fff;transition:.45s var(--ease);border-bottom:1px solid transparent}.site-header.scrolled{height:68px;background:rgba(8,10,13,.72);backdrop-filter:blur(20px) saturate(140%);-webkit-backdrop-filter:blur(20px) saturate(140%);border-bottom-color:rgba(255,255,255,.08)}
.brand{display:flex;align-items:center;width:112px}.brand img{height:auto;filter:drop-shadow(0 0 12px rgba(43,102,233,.12))}
.desktop-nav{position:absolute;left:50%;transform:translateX(-50%);display:flex;gap:34px;font-size:13px;font-weight:650;letter-spacing:.02em}.desktop-nav a{opacity:.8;transition:.25s}.desktop-nav a:hover{opacity:1}
.header-actions{display:flex;align-items:center;gap:10px}.lang-switch,.menu-toggle{border:0;color:#fff;background:transparent;cursor:pointer}.lang-switch{font-size:12px;letter-spacing:.12em;padding:12px}.header-cta{padding:11px 16px;border:1px solid rgba(255,255,255,.35);border-radius:999px;font-size:12px;font-weight:700;backdrop-filter:blur(8px)}
.menu-toggle{display:none;width:42px;height:42px;position:relative}.menu-toggle span{position:absolute;width:18px;height:1px;background:#fff;left:12px;transition:.3s}.menu-toggle span:first-child{top:17px}.menu-toggle span:last-child{top:24px}.menu-toggle.active span:first-child{transform:translateY(3.5px) rotate(45deg)}.menu-toggle.active span:last-child{transform:translateY(-3.5px) rotate(-45deg)}
.mobile-menu{position:fixed;z-index:140;inset:0;background:rgba(5,7,9,.98);color:#fff;display:none;opacity:0;visibility:hidden;transition:.35s}.mobile-menu.open{opacity:1;visibility:visible}.mobile-menu-inner{padding:120px var(--pad) 50px;display:flex;flex-direction:column;gap:18px}.mobile-menu a{font-size:clamp(34px,10vw,58px);line-height:1.1;font-weight:600;letter-spacing:-.04em;padding:10px 0;border-bottom:1px solid rgba(255,255,255,.12)}

.hero{position:relative;height:100svh;min-height:720px;color:#fff;background:#15171a;overflow:hidden}.hero-video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center}.hero-shade{position:absolute;inset:0;background:linear-gradient(90deg,rgba(0,0,0,.62) 0%,rgba(0,0,0,.26) 45%,rgba(0,0,0,.06) 75%),linear-gradient(0deg,rgba(0,0,0,.48) 0%,transparent 40%)}.hero-grid{position:absolute;inset:0;opacity:.08;background-image:linear-gradient(rgba(255,255,255,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.08) 1px,transparent 1px);background-size:72px 72px;mask-image:linear-gradient(to bottom,transparent 0,#000 32%,#000 100%)}
.hero-content{position:absolute;left:var(--pad);bottom:clamp(92px,11vh,142px);max-width:min(850px,72vw)}.eyebrow{font-size:11px;letter-spacing:.22em;font-weight:800;margin-bottom:20px}.hero h1{font-size:clamp(32px,3.2vw,38px);line-height:1.08;max-width:720px}.hero p{color:rgba(255,255,255,.77);max-width:670px;margin-top:26px;font-size:clamp(18px,1.4vw,23px)}.hero-actions{display:flex;gap:12px;margin-top:34px;flex-wrap:wrap}.button{display:inline-flex;align-items:center;justify-content:center;gap:30px;min-height:50px;padding:0 20px;border-radius:999px;font-size:13px;font-weight:750;letter-spacing:.01em;transition:.35s var(--ease)}.button i{font-style:normal;font-size:18px}.button-light{background:#fff;color:#0a0b0d}.button-light:hover{transform:translateY(-2px);box-shadow:0 14px 34px rgba(255,255,255,.14)}.button-ghost{border:1px solid rgba(255,255,255,.38);color:#fff;background:rgba(0,0,0,.12);backdrop-filter:blur(8px)}.button-dark{background:#0b0d10;color:#fff}.button:hover{padding-left:24px;padding-right:24px}
.hero-status{position:absolute;right:var(--pad);bottom:clamp(92px,11vh,142px);display:flex;align-items:center;gap:12px;padding:13px 16px;border:1px solid rgba(255,255,255,.22);border-radius:18px;background:rgba(0,0,0,.16);backdrop-filter:blur(10px)}.status-dot{width:8px;height:8px;border-radius:50%;background:var(--cyan);box-shadow:0 0 14px var(--cyan);animation:pulse 1.8s infinite}.hero-status strong{display:block;font-size:10px;letter-spacing:.16em}.hero-status small{display:block;margin-top:3px;color:rgba(255,255,255,.65);font-size:11px}.scroll-cue{position:absolute;left:50%;bottom:24px;width:34px;height:56px;transform:translateX(-50%);border:1px solid rgba(255,255,255,.3);border-radius:999px}.scroll-cue span{position:absolute;left:50%;top:10px;width:4px;height:4px;border-radius:50%;background:#fff;transform:translateX(-50%);animation:scrollCue 1.8s infinite}
@keyframes pulse{0%,100%{opacity:.55;transform:scale(.8)}50%{opacity:1;transform:scale(1.1)}}@keyframes scrollCue{0%{transform:translate(-50%,0);opacity:0}20%{opacity:1}75%{opacity:1}100%{transform:translate(-50%,22px);opacity:0}}

.intro{padding-bottom:0}.intro-layout{display:grid;grid-template-columns:.7fr 1.8fr;gap:8vw;align-items:start}.intro-copy h2{margin-top:-10px}.intro-copy p{max-width:780px;margin-top:32px}.wide-media{position:relative;margin:clamp(70px,8vw,120px) auto 0;width:min(1840px,calc(100% - 24px));border-radius:var(--radius);overflow:hidden;background:#e8e8e5;aspect-ratio:16/9}.wide-media img{width:100%;height:100%;object-fit:cover}.wide-media-caption{position:absolute;left:22px;right:22px;bottom:18px;display:flex;justify-content:space-between;padding:14px 16px;border-radius:14px;background:rgba(255,255,255,.72);backdrop-filter:blur(14px);font-size:11px;font-weight:750;letter-spacing:.08em}

.product-grid{display:grid;grid-template-columns:minmax(320px,.8fr) minmax(0,1.4fr);gap:clamp(48px,8vw,130px);align-items:start}.sticky-copy{position:sticky;top:110px}.product-copy h2{font-size:clamp(30px,3vw,38px);margin-top:18px}.product-copy>p{margin-top:30px;max-width:600px}.metric-list{margin-top:52px;border-top:1px solid var(--line)}.metric-list>div{display:grid;grid-template-columns:145px 1fr;align-items:center;padding:18px 0;border-bottom:1px solid var(--line)}.metric-list strong{font-size:42px;letter-spacing:-.06em}.metric-list span{font-size:13px;line-height:1.35}.metric-list em{font-style:normal;color:#777d85;font-size:11px}.engineering-note{display:block;color:#8b8f95;margin-top:20px;line-height:1.6}.product-visuals{display:grid;grid-template-columns:1fr 1fr;gap:18px}.portrait-card,.landscape-card,.big-card{position:relative;margin:0;border-radius:22px;overflow:hidden;background:#ececea;min-height:360px}.portrait-card{aspect-ratio:.73}.portrait-card img,.landscape-card img,.big-card img{height:100%;object-fit:cover;transition:transform 1.2s var(--ease)}.portrait-card:hover img,.landscape-card:hover img,.big-card:hover img{transform:scale(1.025)}.landscape-card{grid-column:1/-1;aspect-ratio:1.25}.portrait-card figcaption,.landscape-card figcaption,.big-card figcaption{position:absolute;left:14px;right:14px;bottom:14px;display:flex;justify-content:space-between;gap:16px;padding:12px 14px;border-radius:12px;background:rgba(255,255,255,.78);backdrop-filter:blur(12px);font-size:10px;font-weight:750;letter-spacing:.08em}.portrait-card figcaption span:last-child,.landscape-card figcaption span:last-child{color:#62676e;text-align:right}

.engineering-grid-bg{position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);background-size:64px 64px;mask-image:linear-gradient(#000 0%,transparent 75%)}.scan-line{position:absolute;left:0;right:0;height:1px;top:12%;background:linear-gradient(90deg,transparent,var(--cyan),transparent);opacity:.28;box-shadow:0 0 20px var(--cyan);animation:scan 8s linear infinite}@keyframes scan{0%{transform:translateY(0)}50%{transform:translateY(900px)}100%{transform:translateY(0)}}
.engineering-head{position:relative;display:grid;grid-template-columns:1.4fr .7fr;gap:8vw;align-items:end;margin-bottom:72px}.engineering-head h2{margin-top:18px}.engineering-head p{padding-bottom:4px}
.engineering-feature{position:relative;border:1px solid rgba(255,255,255,.12);border-radius:30px;overflow:hidden;min-height:680px;background:#101319}.engineering-feature img{width:100%;height:100%;min-height:680px;object-fit:cover;opacity:.9}.engineering-feature:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(6,8,11,.15) 40%,rgba(6,8,11,.82) 82%)}.engineering-feature-copy{position:absolute;z-index:2;right:6%;bottom:9%;width:min(470px,42%)}.engineering-feature-copy span,.tech-copy span{font-size:10px;letter-spacing:.18em;color:#76ddff;font-weight:800}.engineering-feature-copy h3{font-size:clamp(28px,2.8vw,34px);line-height:1.08;margin-top:14px}.engineering-feature-copy p{font-size:16px;margin-top:18px}
.engineering-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:16px}.tech-card{background:#0d1014;border:1px solid rgba(255,255,255,.1);border-radius:22px;overflow:hidden}.tech-media{aspect-ratio:1.25;overflow:hidden;background:#15191f}.tech-media img{height:100%;object-fit:cover;transition:transform 1s var(--ease)}.tech-card:hover .tech-media img{transform:scale(1.04)}.tech-copy{padding:24px}.tech-copy h3{font-size:28px;margin-top:12px}.tech-copy p{font-size:14px;margin-top:12px;line-height:1.65}

.perception-grid{display:grid;grid-template-columns:.78fr 1.25fr;gap:clamp(46px,7vw,120px);align-items:start}.perception-copy h2{font-size:clamp(30px,3vw,38px);margin-top:18px}.perception-copy>p{margin-top:28px}.pill-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:32px}.pill-row span{font-size:11px;font-weight:700;border:1px solid var(--line);padding:9px 12px;border-radius:999px;background:#fff}.perception-copy blockquote{margin:42px 0 0;padding:0;font-size:clamp(22px,2vw,32px);font-weight:600;letter-spacing:-.035em}.micro-note{font-size:13px!important;color:#7d8289!important;margin-top:14px!important}.perception-visuals{display:grid;gap:18px}.big-card{aspect-ratio:1.48}.big-card:nth-child(2){aspect-ratio:.78}.big-card:nth-child(2) img{object-fit:cover}.big-card figcaption{background:rgba(8,10,12,.72);color:#fff;justify-content:flex-start}

.care{padding-bottom:24px}.care-head{display:grid;grid-template-columns:.55fr 1.2fr .8fr;gap:5vw;align-items:end;margin-bottom:60px}.care-head h2{font-size:clamp(30px,3vw,38px)}.care-head p{font-size:17px}.care-video-grid{width:min(1440px,calc(100% - 24px));margin:auto;display:grid;grid-template-columns:1.2fr .8fr;gap:12px}.video-card{position:relative;min-height:560px;border-radius:26px;overflow:hidden;background:#111}.video-card video{height:100%;object-fit:cover}.video-card-large{min-height:620px}.video-overlay{position:absolute;inset:auto 18px 18px;padding:18px;border-radius:16px;background:rgba(5,7,9,.58);backdrop-filter:blur(14px);color:#fff}.video-overlay span,.reel-card span{font-size:10px;letter-spacing:.16em;font-weight:800;color:#b9c9d8}.video-overlay h3{font-size:24px;margin-top:6px}

.system-story-grid{display:grid;grid-template-columns:.72fr 1.28fr;gap:7vw;align-items:center}.system-story-copy h2{margin-top:18px}.system-story-copy p{margin-top:28px}.system-story-media{position:relative;border-radius:30px;overflow:hidden}.floating-chip{display:none;position:absolute;padding:10px 12px;border-radius:999px;background:rgba(255,255,255,.82);backdrop-filter:blur(12px);font-size:9px;font-weight:800;letter-spacing:.15em;box-shadow:0 8px 28px rgba(0,0,0,.08)}.chip-a{left:6%;top:10%}.chip-b{right:6%;top:18%}.chip-c{left:38%;bottom:8%}

.reel-head{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:48px}.reel-head h2{font-size:clamp(30px,3vw,38px)}.reel-grid{width:min(1880px,calc(100% - 24px));margin:auto;display:grid;grid-template-columns:1.35fr .65fr;gap:12px}.reel-card{position:relative;min-height:650px;border-radius:26px;overflow:hidden;border:1px solid rgba(255,255,255,.1);background:#0b0e12}.reel-card video{height:100%;object-fit:cover}.reel-card>div{position:absolute;left:18px;bottom:18px;padding:16px 18px;background:rgba(0,0,0,.55);backdrop-filter:blur(12px);border-radius:16px}.reel-card h3{font-size:24px;margin-top:6px}

.quadruped{background:#f1f0eb}.quadruped-head{display:grid;grid-template-columns:1.3fr .7fr;gap:7vw;align-items:end;margin-bottom:60px}.quadruped-head h2{margin-top:16px}.quadruped-head p{font-size:17px}.prototype-badge{display:inline-block;margin-top:18px;padding:8px 10px;border-radius:8px;background:#d8bd78;color:#15130d;font-size:10px;font-weight:900;letter-spacing:.12em}
.quadruped-gallery{width:min(1200px,calc(100% - 24px));margin:auto;display:grid;grid-template-columns:1fr;gap:12px}.quad-card{position:relative;margin:0;border-radius:26px;overflow:hidden;background:#e4e2dc;aspect-ratio:1.5}.quad-card img{height:100%;object-fit:cover}.quad-card figcaption{position:absolute;left:16px;right:16px;bottom:16px;padding:16px;border-radius:14px;background:rgba(255,255,255,.8);backdrop-filter:blur(14px);display:flex;justify-content:space-between;align-items:flex-end;gap:20px}.quad-card figcaption span{font-size:10px;letter-spacing:.15em;font-weight:800}.quad-card figcaption strong{font-size:15px;max-width:70%;text-align:right}.quad-specs{display:grid;grid-template-columns:repeat(4,1fr);margin-top:54px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.quad-specs>div{padding:26px 20px;border-right:1px solid var(--line)}.quad-specs>div:last-child{border-right:0}.quad-specs span{font-size:9px;font-weight:900;letter-spacing:.16em;color:#8b6b27}.quad-specs strong{display:block;font-size:20px;margin-top:10px}.quad-specs small{display:block;color:#777b80;margin-top:7px;line-height:1.5}.quad-actions{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:28px}.quad-actions small{color:#85898e}

.future{min-height:88svh;display:flex;align-items:center}.future-inner{position:relative;z-index:2;text-align:center;display:flex;flex-direction:column;align-items:center}.future h2{font-size:clamp(32px,3.4vw,38px);max-width:900px;margin-top:18px}.future p{max-width:760px;margin-top:28px}.future .button{margin-top:34px}.future-orbit{position:absolute;inset:50% auto auto 50%;width:min(84vw,1200px);aspect-ratio:1;transform:translate(-50%,-50%);opacity:.3}.future-orbit i{position:absolute;inset:12%;border:1px solid rgba(67,226,255,.2);border-radius:50%;animation:orbit 18s linear infinite}.future-orbit i:nth-child(2){inset:25%;animation-duration:13s;animation-direction:reverse}.future-orbit i:nth-child(3){inset:38%;animation-duration:9s}@keyframes orbit{to{transform:rotate(360deg)}}

.site-footer{background:#07090c;color:#8e96a1;padding:42px var(--pad);display:flex;align-items:center;justify-content:space-between;border-top:1px solid rgba(255,255,255,.08)}.footer-brand{width:94px}.footer-meta{display:flex;gap:28px;font-size:10px;letter-spacing:.13em}

.reveal{opacity:0;transform:translateY(28px);transition:opacity .85s var(--ease),transform .85s var(--ease)}.reveal.in-view{opacity:1;transform:none}.delay-1{transition-delay:.1s}.delay-2{transition-delay:.2s}

@media (max-width:1120px){
  .desktop-nav{display:none}.menu-toggle{display:block}.mobile-menu{display:block}.header-cta{display:none}
  .intro-layout,.engineering-head,.quadruped-head{grid-template-columns:1fr;gap:28px}.intro-copy{max-width:900px}
  .product-grid,.perception-grid{grid-template-columns:1fr}.sticky-copy{position:relative;top:auto}.product-copy{max-width:900px}.product-visuals{margin-top:20px}
  .engineering-feature-copy{width:52%}.care-head{grid-template-columns:1fr;gap:18px}.care-head p{max-width:700px}.care-video-grid{grid-template-columns:1fr 1fr}.video-card-large{grid-column:1/-1}.system-story-grid{grid-template-columns:1fr;gap:50px}.system-story-copy{max-width:850px}
  .quad-specs{grid-template-columns:1fr 1fr}.quad-specs>div:nth-child(2){border-right:0}.quad-specs>div:nth-child(-n+2){border-bottom:1px solid var(--line)}
}
@media (max-width:760px){
  :root{--pad:20px;--radius:20px}
  .site-header{height:68px;padding:0 16px}.brand{width:84px}.lang-switch{padding:9px}
  .hero{min-height:680px}.hero-video{object-position:61% center}.hero-shade{background:linear-gradient(90deg,rgba(0,0,0,.74),rgba(0,0,0,.18)),linear-gradient(0deg,rgba(0,0,0,.52),transparent 50%)}.hero-content{left:20px;right:20px;bottom:92px;max-width:none}.hero h1{font-size:clamp(30px,8vw,38px)}.hero p{font-size:16px;line-height:1.6;max-width:92%}.hero-actions{margin-top:26px}.button{min-height:48px}.hero-status{display:none}.scroll-cue{bottom:18px}
  .section{padding:88px 0}.section-dark,.section-muted{padding:90px 0}.intro-copy h2,.product-copy h2,.perception-copy h2,.system-story-copy h2,.engineering-head h2,.care-head h2,.reel-head h2,.quadruped-head h2{font-size:clamp(28px,8vw,36px)}
  .wide-media{aspect-ratio:.82}.wide-media img{object-fit:cover;object-position:center}.wide-media-caption{font-size:8px;left:10px;right:10px;bottom:10px}
  .metric-list>div{grid-template-columns:112px 1fr}.metric-list strong{font-size:36px}.product-visuals{grid-template-columns:1fr}.portrait-card,.landscape-card{grid-column:auto;aspect-ratio:.82}.landscape-card{aspect-ratio:1.05}.portrait-card figcaption,.landscape-card figcaption{font-size:8px}
  .engineering-feature{min-height:620px}.engineering-feature img{min-height:620px;object-position:38% center}.engineering-feature:after{background:linear-gradient(0deg,rgba(6,8,11,.88),rgba(6,8,11,.04) 62%)}.engineering-feature-copy{left:20px;right:20px;bottom:24px;width:auto}.engineering-feature-copy h3{font-size:30px}.engineering-feature-copy p{font-size:14px}.engineering-cards{grid-template-columns:1fr}.tech-media{aspect-ratio:1.35}
  .big-card{aspect-ratio:1.1}.big-card:nth-child(2){aspect-ratio:.8}.care-video-grid,.reel-grid,.quadruped-gallery{grid-template-columns:1fr;width:calc(100% - 16px);gap:8px}.video-card,.video-card-large,.reel-card{min-height:72svh}.video-card-large{grid-column:auto}.reel-card{min-height:64svh}
  .floating-chip{font-size:7px;padding:8px 9px}.chip-c{left:12%}.reel-head{display:block}.reel-head h2{margin-top:16px}
  .quadruped-head p{margin-top:10px}.quad-card{aspect-ratio:1.08}.quad-card figcaption{padding:12px;left:10px;right:10px;bottom:10px}.quad-card figcaption strong{font-size:11px}.quad-specs{grid-template-columns:1fr}.quad-specs>div{border-right:0!important;border-bottom:1px solid var(--line)}.quad-specs>div:last-child{border-bottom:0}.quad-actions{align-items:flex-start;flex-direction:column}
  .future{min-height:78svh}.future h2{font-size:clamp(30px,9vw,38px)}.site-footer{align-items:flex-start;gap:26px;flex-direction:column}.footer-meta{flex-direction:column;gap:8px}
}
@media (hover:none),(pointer:coarse){.cursor-dot,.cursor-ring{display:none}.parallax-card{transform:none!important}}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.reveal{opacity:1;transform:none;transition:none}.scan-line,.future-orbit i,.status-dot,.scroll-cue span{animation:none}.hero-video,.video-card video,.reel-card video{display:none}.hero{background-image:url('../posters/1c91b58a4d1ea347d97c3d1a84faca6a.jpg');background-size:cover;background-position:center}}


/* 2026-08-25 refinement: cleaner real-product presentation */
.product-visuals-single{display:block}
.product-main-visual{position:relative;margin:0;border-radius:18px;overflow:hidden;background:#ececea;aspect-ratio:4/5;max-height:860px}
.product-main-visual img{width:100%;height:100%;object-fit:cover;object-position:center}
.product-main-visual figcaption{position:absolute;left:14px;right:14px;bottom:14px;display:flex;justify-content:space-between;gap:16px;padding:12px 14px;border-radius:10px;background:rgba(255,255,255,.84);backdrop-filter:blur(10px);font-size:10px;font-weight:750;letter-spacing:.08em}
.product-main-visual figcaption span:last-child{color:#62676e;text-align:right}
.perception-visuals{display:block}
.perception-visuals .big-card{aspect-ratio:1.45}
.quadruped-gallery-single .quad-card{aspect-ratio:1.65}
.system-story-media{border-radius:18px}
.engineering-feature,.tech-card,.video-card,.quad-card{border-radius:18px}
.hero-content,.intro-copy,.product-copy,.engineering-head,.perception-copy,.care-head,.system-story-copy,.quadruped-head,.future-inner{--title-max:38px}
h1,h2,h3{max-width:100%}
@media (max-width:760px){
  .product-main-visual{aspect-ratio:.82}
  .care-video-grid{grid-template-columns:1fr}
  .video-card,.video-card-large{min-height:58svh}
  .quadruped-gallery-single .quad-card{aspect-ratio:1.08}
}

/* 2026-08-25 company content + social footer */
.about-company{background:#f7f7f4;padding-top:clamp(88px,10vw,150px)}
.about-company-head{display:grid;grid-template-columns:.55fr 1.1fr;gap:6vw;align-items:end;padding-bottom:54px;border-bottom:1px solid var(--line)}
.about-company-head h2{font-size:clamp(30px,3vw,38px);max-width:680px}
.about-company-head p{grid-column:2;max-width:760px;font-size:17px}
.about-stack{display:flex;flex-direction:column}
.about-block{display:grid;grid-template-columns:minmax(150px,.34fr) minmax(0,1.35fr);gap:6vw;padding:clamp(68px,7vw,108px) 0;border-bottom:1px solid var(--line)}
.about-block:last-child{border-bottom:0;padding-bottom:0}
.about-label{position:sticky;top:104px;align-self:start;font-size:clamp(16px,1.25vw,20px);font-weight:780;letter-spacing:.08em;color:#3f464f;text-transform:uppercase;line-height:1.35}
.about-content{max-width:980px}
.about-content h2{font-size:clamp(29px,3vw,38px);margin-bottom:28px}
.about-content>p{font-size:17px;line-height:1.9;max-width:900px;margin-top:18px;color:#565b62}
.about-content>p:first-of-type{margin-top:0}
.name-meaning{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin:38px 0 36px}
.name-meaning>div{background:#f7f7f4;padding:24px 20px;min-height:155px}
.name-meaning strong{display:block;font-size:28px;letter-spacing:-.04em;color:#0b0d10;margin-bottom:18px}
.name-meaning p{font-size:13px;line-height:1.65;color:#686d74}
.brand-statement{margin-top:34px;padding:22px 24px;border-left:3px solid var(--blue);background:#eef2fb;font-size:18px;font-weight:750;line-height:1.6;letter-spacing:-.02em}
.company-principles{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin-top:38px}
.company-principles>div{background:#fff;padding:26px 24px;min-height:140px}
.company-principles span,.culture-idea span,.talent-idea span{display:block;font-size:10px;font-weight:850;letter-spacing:.15em;color:#747a82;margin-bottom:14px}
.company-principles strong{display:block;font-size:18px;line-height:1.5;letter-spacing:-.02em}
.culture-idea{margin:38px 0 26px;padding:28px 30px;background:#0b0d10;color:#fff;border-radius:14px}
.culture-idea span{color:#91a0af}
.culture-idea strong{font-size:clamp(24px,2.4vw,34px);line-height:1.35;letter-spacing:-.035em}
.value-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin-top:24px}
.value-grid>div{background:#fff;padding:26px 24px;min-height:205px}
.value-grid>div>span{font-size:10px;font-weight:900;letter-spacing:.15em;color:#8f98a2}
.value-grid h3{font-size:20px;line-height:1.25;margin-top:26px;letter-spacing:-.025em}
.value-grid p{font-size:14px;line-height:1.75;margin-top:12px;color:#6d7279}
.talent-idea{margin-top:34px;padding-top:28px;border-top:1px solid var(--line)}
.talent-idea strong{display:block;font-size:22px;line-height:1.5;letter-spacing:-.02em;max-width:760px}
.talent-idea p{font-size:16px;line-height:1.85;max-width:850px;margin-top:16px;color:#62676e}
.development-list{display:grid;grid-template-columns:repeat(2,1fr);gap:0;margin:36px 0;border-top:1px solid var(--line);border-left:1px solid var(--line)}
.development-list>div{padding:26px 24px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);background:#fff;min-height:168px}
.development-list strong{display:block;font-size:18px;line-height:1.35;margin-bottom:12px}
.development-list p{font-size:14px;line-height:1.72;color:#6b7077}
.brand-statement-dark{background:#0a0c0f;color:#fff;border-left-color:var(--cyan)}

.site-footer{display:block;padding:0;background:#07090c}
.footer-top{padding:48px var(--pad) 40px;display:grid;grid-template-columns:1.2fr .9fr 1fr;gap:48px;align-items:end}
.footer-identity .footer-brand{width:112px}
.footer-identity p{margin-top:16px;color:#7f8792;font-size:13px;line-height:1.6}
.footer-contact span,.footer-social-label{display:block;color:#68717c;font-size:10px;font-weight:800;letter-spacing:.16em;margin-bottom:12px;text-transform:uppercase}
.footer-contact a{display:inline-block;color:#f3f5f7;font-size:18px;font-weight:650;letter-spacing:-.015em;transition:.25s}
.footer-contact a:hover{color:var(--cyan)}
.footer-social-wrap{justify-self:end}
.social-links{display:flex;align-items:center;gap:10px}
.social-link{position:relative;width:42px;height:42px;border-radius:50%;border:1px solid rgba(255,255,255,.14);display:inline-flex;align-items:center;justify-content:center;background:rgba(255,255,255,.03);color:#d8dde3;transition:.28s var(--ease);cursor:pointer;padding:0}
.social-link svg{width:18px;height:18px;fill:currentColor}
.social-link:hover,.social-link:focus-visible{color:#fff;border-color:rgba(71,233,255,.55);background:rgba(71,233,255,.08);transform:translateY(-2px);outline:none}
.wechat-qr{position:absolute;right:0;bottom:54px;width:188px;padding:10px;border-radius:14px;background:#fff;box-shadow:0 18px 50px rgba(0,0,0,.38);opacity:0;visibility:hidden;transform:translateY(10px) scale(.96);transform-origin:bottom right;transition:.26s var(--ease);pointer-events:none;z-index:20}
.wechat-qr:after{content:"";position:absolute;right:16px;bottom:-7px;width:14px;height:14px;background:#fff;transform:rotate(45deg)}
.wechat-qr img{width:168px;height:168px;object-fit:cover;border-radius:8px}
.wechat-qr small{position:relative;z-index:2;display:block;color:#24282d;font-size:11px;font-weight:700;text-align:center;margin-top:8px;letter-spacing:.04em}
.wechat-social:hover .wechat-qr,.wechat-social:focus-visible .wechat-qr,.wechat-social.open .wechat-qr{opacity:1;visibility:visible;transform:none}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:20px var(--pad);display:flex;justify-content:space-between;gap:24px;color:#68717b;font-size:10px;letter-spacing:.13em}

/* hard ceiling for visible titles */
h1{font-size:clamp(30px,3.2vw,38px)}
h2{font-size:clamp(28px,3vw,38px)}
h3{font-size:clamp(18px,2.2vw,30px)}
.culture-idea strong{font-size:clamp(24px,2.4vw,34px)}
.hero h1,.future h2,.about-company-head h2,.about-content h2,.product-copy h2,.engineering-head h2,.perception-copy h2,.care-head h2,.system-story-copy h2,.quadruped-head h2{font-size:clamp(28px,3vw,38px)}
.tech-copy h3,.engineering-feature-copy h3,.video-overlay h3,.value-grid h3{font-size:min(24px,38px)}

@media (max-width:1120px){
  .about-company-head{grid-template-columns:1fr;gap:20px}.about-company-head p{grid-column:auto}
  .about-block{grid-template-columns:1fr;gap:20px}.about-label{position:relative;top:auto}
  .footer-top{grid-template-columns:1fr 1fr}.footer-social-wrap{justify-self:start;grid-column:1/-1}
}
@media (max-width:760px){
  .about-company{padding-top:82px}.about-company-head{padding-bottom:36px}
  .about-block{padding:58px 0}.about-content h2{margin-bottom:22px}.about-content>p{font-size:15px;line-height:1.82}
  .name-meaning,.company-principles,.value-grid,.development-list{grid-template-columns:1fr}
  .name-meaning>div{min-height:auto}.company-principles>div,.value-grid>div,.development-list>div{min-height:auto}
  .culture-idea{padding:24px 20px}.culture-idea strong{font-size:24px}.talent-idea strong{font-size:19px}
  .footer-top{grid-template-columns:1fr;gap:34px;padding:38px 20px 30px}.footer-social-wrap{grid-column:auto}.footer-bottom{padding:18px 20px;flex-direction:column;gap:8px}
  .wechat-qr{right:auto;left:50%;transform:translate(-50%,10px) scale(.96);transform-origin:bottom center}.wechat-social:hover .wechat-qr,.wechat-social:focus-visible .wechat-qr,.wechat-social.open .wechat-qr{transform:translate(-50%,0)}.wechat-qr:after{right:auto;left:50%;transform:translateX(-50%) rotate(45deg)}
}

/* 2026-08-25 K2X POWER adaptive transparent-to-white header treatment */
.site-header{
  height:92px;
  padding:0 clamp(22px,3vw,52px);
  background:transparent;
  color:#fff;
  border-bottom:1px solid transparent;
  box-shadow:none;
  backdrop-filter:none;
  -webkit-backdrop-filter:none;
  transition:height .42s var(--ease),background .42s var(--ease),color .32s ease,border-color .42s var(--ease),box-shadow .42s var(--ease),backdrop-filter .42s var(--ease);
}
.site-header.scrolled{
  height:76px;
  background:rgba(255,255,255,.97);
  color:#11151b;
  border-bottom-color:rgba(9,21,45,.10);
  box-shadow:0 10px 32px rgba(6,16,34,.09);
  backdrop-filter:blur(18px) saturate(135%);
  -webkit-backdrop-filter:blur(18px) saturate(135%);
}
.site-header .brand,
.site-header.scrolled .brand{
  width:clamp(230px,19vw,300px);
  min-height:0;
  padding:0;
  border:0;
  border-radius:0;
  background:transparent;
  box-shadow:none;
  backdrop-filter:none;
  -webkit-backdrop-filter:none;
  transition:width .35s var(--ease),transform .35s var(--ease);
}
.site-header.scrolled .brand{width:clamp(215px,17vw,275px)}
.site-header .brand img{
  width:100%;
  height:auto;
  max-height:64px;
  object-fit:contain;
  /* At the top of the page the logo becomes a clean white signature over video. */
  filter:brightness(0) invert(1) drop-shadow(0 2px 12px rgba(0,0,0,.28));
  transition:filter .35s ease,opacity .35s ease;
}
.site-header.scrolled .brand img{
  filter:none;
}
.desktop-nav{
  color:#fff;
  transition:color .32s ease;
}
.desktop-nav a{opacity:.84;transition:opacity .25s,color .25s}
.desktop-nav a:hover{opacity:1;color:#fff}
.site-header.scrolled .desktop-nav{color:#252b33}
.site-header.scrolled .desktop-nav a{opacity:.72}
.site-header.scrolled .desktop-nav a:hover{opacity:1;color:var(--blue)}
.lang-switch,.menu-toggle{
  color:#fff;
  transition:color .32s ease;
}
.menu-toggle span{
  background:#fff;
  transition:background .32s ease,transform .3s;
}
.site-header.scrolled .lang-switch,.site-header.scrolled .menu-toggle{color:#161b22}
.site-header.scrolled .menu-toggle span{background:#161b22}
.header-cta{
  color:#fff;
  background:rgba(255,255,255,.08);
  border-color:rgba(255,255,255,.55);
  box-shadow:none;
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  transition:background .28s ease,border-color .28s ease,color .28s ease,transform .25s ease;
}
.header-cta:hover{
  background:#fff;
  border-color:#fff;
  color:#111820;
}
.site-header.scrolled .header-cta{
  color:#fff;
  background:#111820;
  border-color:#111820;
  box-shadow:0 6px 18px rgba(5,18,38,.12);
  backdrop-filter:none;
  -webkit-backdrop-filter:none;
}
.site-header.scrolled .header-cta:hover{background:var(--blue);border-color:var(--blue);color:#fff}

/* When the mobile menu is open, keep the header visually integrated with the dark menu. */
body.menu-open .site-header,
body.menu-open .site-header.scrolled{
  background:rgba(5,7,9,.98);
  color:#fff;
  border-bottom-color:rgba(255,255,255,.08);
  box-shadow:none;
}
body.menu-open .site-header .brand img,
body.menu-open .site-header.scrolled .brand img{filter:brightness(0) invert(1) drop-shadow(0 2px 12px rgba(0,0,0,.28))}
body.menu-open .site-header .lang-switch,
body.menu-open .site-header.scrolled .lang-switch,
body.menu-open .site-header .menu-toggle,
body.menu-open .site-header.scrolled .menu-toggle{color:#fff}
body.menu-open .site-header .menu-toggle span,
body.menu-open .site-header.scrolled .menu-toggle span{background:#fff}

@media (max-width:1120px){
  .site-header .brand,.site-header.scrolled .brand{width:clamp(210px,28vw,270px)}
}
@media (max-width:760px){
  .site-header,.site-header.scrolled{height:68px;padding:0 12px}
  .site-header .brand,.site-header.scrolled .brand{width:clamp(168px,50vw,205px)}
  .site-header .brand img{max-height:46px}
}
@media (max-width:390px){
  .site-header .brand,.site-header.scrolled .brand{width:158px}
  .lang-switch{font-size:11px;padding:7px}
  .menu-toggle{width:38px;height:38px}
}



/* 2026-08-26 footer: restore V3 visual treatment, keep the current K2X POWER logo white */
.footer-identity .footer-brand img{
  width:100%;
  height:auto;
  display:block;
  filter:brightness(0) invert(1);
  opacity:1;
}


/* 2026-08-26 content order and typography refinements */
.footer-identity .footer-brand{width:clamp(190px,15vw,240px)}
@media (max-width:760px){.about-label{font-size:18px;letter-spacing:.06em}.footer-identity .footer-brand{width:min(220px,72vw)}}

/* 2026-08-26 video placement refinement */
.home-bottom-video video{width:100%;height:100%;object-fit:cover;object-position:center}
.about-video-wrap{margin-top:clamp(34px,4.5vw,68px);margin-bottom:clamp(18px,3vw,42px)}
.about-video{display:block;width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:18px;background:#080a0d;box-shadow:0 22px 55px rgba(10,18,28,.10)}
@media (max-width:760px){
  .about-video-wrap{margin-top:28px;margin-bottom:8px}
  .about-video{border-radius:14px}
}