/* PIoT HTML 动画演示 · 1920×1080 舞台，等比缩放 */
@font-face{font-family:"PIoT Sans";src:url(../assets/fonts/PIoT-Sans-400.woff2) format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:"PIoT Sans";src:url(../assets/fonts/PIoT-Sans-500.woff2) format("woff2");font-weight:500;font-display:swap}
@font-face{font-family:"PIoT Sans";src:url(../assets/fonts/PIoT-Sans-700.woff2) format("woff2");font-weight:700;font-display:swap}
:root{
  --brand:#025e9f; --brand-hi:#2b8fd6; --ice:#9fd4ff; --ui:#2f6fed; --ai:#7b39f5;
  --bg:#03060c; --ink:#eef4fb; --ink2:#a9b8cc; --ink3:#6f8199; --line:rgba(159,212,255,.16);
  --glass:rgba(10,22,40,.62); --glass2:rgba(14,30,54,.78);
  --font:"PIoT Sans","HarmonyOS Sans SC","Microsoft YaHei UI","Microsoft YaHei","PingFang SC","Noto Sans CJK SC","Source Han Sans SC",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{width:100%;height:100%;overflow:hidden;background:var(--bg);color:var(--ink);font-family:var(--font);-webkit-font-smoothing:antialiased}
body.idle{cursor:none}
#world{position:fixed;inset:0;width:100vw;height:100vh;display:block;z-index:0}
#viewport{position:fixed;inset:0;z-index:1;overflow:hidden;pointer-events:none}
#stage{position:absolute;left:0;top:0;width:1920px;height:1080px;transform-origin:0 0;pointer-events:auto}
.scene{position:absolute;inset:0;display:none;overflow:hidden}
.scene.on{display:block}
.abs{position:absolute}
img{display:block}
video{display:block}

/* ---------- typography ---------- */
.kicker{font-size:22px;letter-spacing:.32em;color:var(--ice);font-weight:500;display:flex;align-items:center;gap:16px;white-space:nowrap}
.kicker::before{content:"";width:44px;height:2px;background:linear-gradient(90deg,var(--brand-hi),transparent)}
.kicker.ai{color:#c8b0ff}.kicker.ai::before{background:linear-gradient(90deg,var(--ai),transparent)}
.h1{font-size:96px;line-height:1.12;font-weight:700;letter-spacing:.02em}
.h2{font-size:68px;line-height:1.16;font-weight:700;letter-spacing:.01em}
.h3{font-size:40px;line-height:1.25;font-weight:700}
.lead{font-size:28px;line-height:1.6;color:var(--ink2)}
.small{font-size:20px;line-height:1.5;color:var(--ink3)}
.grad{background:linear-gradient(100deg,#ffffff 10%,#9fd4ff 55%,#3c9be6 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
.grad-ai{background:linear-gradient(100deg,#ffffff 0%,#c9b2ff 45%,#7b39f5 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
.num{font-family:"PIoT Sans",var(--font);font-weight:700;font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.cursor{display:inline-block;width:.5em;color:var(--ice);animation:blink 1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}

/* ---------- HUD ---------- */
#hud-logo{position:absolute;left:64px;top:44px;display:flex;align-items:center;gap:18px;z-index:50;pointer-events:none}
#hud-logo img{height:26px}
#hud-logo span{font-size:17px;letter-spacing:.2em;color:var(--ink3);white-space:nowrap}
#hud-count{position:absolute;right:64px;top:44px;font-size:18px;letter-spacing:.18em;color:var(--ink3);z-index:50;font-family:"PIoT Sans",var(--font);pointer-events:none}
#hud-count b{color:var(--ink);font-weight:700}
body.clean #hud-logo,body.clean #hud-count,body.clean #rail{opacity:0}

/* ---------- shared components ---------- */
.glass{background:var(--glass);border:1px solid var(--line);border-radius:22px;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px)}
.chip{display:inline-flex;align-items:center;gap:10px;height:46px;padding:0 22px;border-radius:23px;border:1px solid rgba(159,212,255,.3);background:rgba(2,94,159,.22);font-size:22px;color:var(--ink);white-space:nowrap}
.chip.ai{border-color:rgba(123,57,245,.6);background:rgba(123,57,245,.18)}
.chip .dot{width:8px;height:8px;border-radius:50%;background:var(--ice);box-shadow:0 0 10px var(--ice)}
.chip.ai .dot{background:#b48cff;box-shadow:0 0 10px var(--ai)}
@keyframes pulse{50%{transform:scale(1.8);opacity:.5}}
.demo-badge{position:absolute;z-index:5;right:18px;top:18px;padding:4px 12px;border-radius:6px;background:rgba(3,6,12,.72);border:1px solid rgba(255,255,255,.25);font-size:15px;letter-spacing:.12em;color:#dfe8f3}
.bg-full{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.shade-l{position:absolute;inset:0;background:linear-gradient(90deg,rgba(3,6,12,.96) 0%,rgba(3,6,12,.86) 34%,rgba(3,6,12,.35) 62%,rgba(3,6,12,.65) 100%)}
.shade-b{position:absolute;inset:0;background:linear-gradient(180deg,rgba(3,6,12,.55),rgba(3,6,12,.1) 30%,rgba(3,6,12,.2) 60%,rgba(3,6,12,.95))}
.vignette{position:absolute;inset:0;background:radial-gradient(ellipse at 50% 45%,transparent 30%,rgba(3,6,12,.85) 100%);pointer-events:none}

/* device frame */
.device{position:absolute;border-radius:26px;padding:16px;background:linear-gradient(160deg,#1d2a3d,#0a111c 60%);box-shadow:0 50px 140px rgba(0,0,0,.7),0 0 0 1px rgba(255,255,255,.07) inset,0 0 80px rgba(43,143,214,.18)}
.device .screen{position:relative;width:100%;aspect-ratio:16/9;border-radius:12px;overflow:hidden;background:#0b0f16}
.device .screen video,.device .screen img{width:100%;height:100%;object-fit:cover}
.device.ai::before{content:"";position:absolute;inset:-2px;border-radius:28px;padding:2px;background:conic-gradient(from var(--ang,0deg),#7b39f5,#2f6fed,#9fd4ff,#7b39f5);-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude;opacity:.55}
.device.ai{box-shadow:0 50px 140px rgba(0,0,0,.7),0 0 90px rgba(123,57,245,.28)}
@property --ang{syntax:"<angle>";initial-value:0deg;inherits:false}
@keyframes spinb{to{--ang:360deg}}
.tilt-wrap{position:absolute;perspective:2400px}

/* model slot */
.slot{position:absolute;pointer-events:auto;cursor:grab}
.slot:active{cursor:grabbing}
.slot .loading{position:absolute;left:50%;top:50%;width:64px;height:64px;margin:-32px;border-radius:50%;border:3px solid rgba(159,212,255,.15);border-top-color:var(--ice);animation:spin 1s linear infinite;opacity:0;transition:opacity .3s}
.slot.wait .loading{opacity:1}
@keyframes spin{to{transform:rotate(360deg)}}
.hint3d{position:absolute;font-size:16px;letter-spacing:.14em;color:var(--ink3);white-space:nowrap}
.btn{pointer-events:auto;cursor:pointer;height:48px;padding:0 24px;border-radius:24px;border:1px solid rgba(159,212,255,.35);background:rgba(10,22,40,.7);color:var(--ink);font:500 20px var(--font);letter-spacing:.08em;transition:background .25s,border-color .25s}
.btn:hover{border-color:var(--ice)}
.btn.on{background:var(--brand);border-color:var(--brand-hi)}

/* stat */
.stat .v{font-size:112px;line-height:1;font-weight:700}
.stat .u{font-size:34px;font-weight:700;margin-left:8px;color:var(--ice)}
.stat .k{font-size:22px;color:var(--ink2);margin-top:12px;line-height:1.45}

/* ---------- scene specific ---------- */
/* cover */
#s-cover .logo-layer{position:absolute;left:0;top:0;width:1920px;height:1080px;transform:translateY(-150px) scale(.82);transform-origin:50% 50%}
#s-cover .logo-flow{opacity:0;filter:contrast(1.12)}
#s-cover .cover-title{position:absolute;left:0;right:0;top:640px;text-align:center}
#s-cover .cover-title .h1{font-size:76px;letter-spacing:.14em}
#s-cover .cover-title .kicker{justify-content:center;margin-bottom:26px}
#s-cover .cover-title .kicker::after{content:"";width:44px;height:2px;background:linear-gradient(270deg,var(--brand-hi),transparent)}
#s-cover .cover-sub{margin-top:26px;font-size:28px;letter-spacing:.32em;color:var(--ink2)}
#s-cover .cover-hint{position:absolute;left:0;right:0;bottom:110px;text-align:center;font-size:17px;letter-spacing:.3em;color:var(--ink3)}

/* agenda */
#s-agenda .grid{position:absolute;left:160px;top:330px;width:1600px;height:620px;display:grid;grid-template-columns:repeat(4,1fr);gap:28px}
.acard{position:relative;border-radius:18px;overflow:hidden;background:var(--glass2);border:1px solid var(--line);cursor:pointer;pointer-events:auto;transition:transform .35s cubic-bezier(.2,.8,.2,1),border-color .35s;height:300px}
.acard:hover{border-color:rgba(159,212,255,.5)}
.acard img{width:100%;height:170px;object-fit:cover;opacity:.85}
.acard .n{position:absolute;left:22px;top:98px;line-height:1;font-size:54px;font-weight:700;color:#fff;text-shadow:0 4px 20px rgba(0,0,0,.6)}
.acard .t{padding:16px 22px 0;font-size:25px;line-height:1.35;font-weight:500}

/* ch1 accum */
.cnt-card{position:absolute;width:380px;height:206px;padding:26px 28px}
.cnt-card .v{font-size:84px;line-height:1;font-weight:700}
.cnt-card .u{font-size:28px;font-weight:700;color:var(--ice);margin-left:6px}
.cnt-card .k{font-size:19px;line-height:1.5;color:var(--ink2);margin-top:14px}
.film{position:absolute;left:120px;top:720px;display:flex;gap:22px}
.film figure{width:318px}
.film img{width:318px;height:180px;object-fit:cover;border-radius:12px;border:1px solid var(--line)}
.film figcaption{font-size:18px;line-height:1.45;color:var(--ink2);margin-top:12px;height:54px}
.hexes{display:flex;gap:18px;margin-top:40px}
.hex{width:180px;height:156px;clip-path:polygon(25% 0,75% 0,100% 50%,75% 100%,25% 100%,0 50%);background:linear-gradient(160deg,rgba(43,143,214,.5),rgba(2,94,159,.18));display:flex;align-items:center;justify-content:center;text-align:center;font-size:22px;font-weight:700;line-height:1.3;padding:0 26px}

/* honors */
.wall{position:absolute;left:-200px;top:450px;width:2600px;height:420px;transform:perspective(1800px) rotateX(8deg) rotateY(-18deg);transform-origin:50% 50%}
.wall .row{position:absolute;left:0;top:0;display:flex;gap:26px;height:100%;align-items:center}
.wall img{height:330px;width:auto;border-radius:6px;box-shadow:0 30px 60px rgba(0,0,0,.6);opacity:.82}
.wall-shade{position:absolute;left:0;right:0;top:420px;bottom:0;background:linear-gradient(180deg,rgba(3,6,12,1),rgba(3,6,12,.25) 30%,rgba(3,6,12,.5) 75%,rgba(3,6,12,.95))}
.honor-stats{position:absolute;left:120px;top:300px;display:flex;gap:70px}
.honor-stats .stat .v{font-size:104px}
.awards{position:absolute;left:120px;top:896px;width:1680px;display:flex;flex-wrap:wrap;gap:14px}
.awards .chip{height:40px;font-size:19px;background:rgba(3,10,20,.75)}

/* cars coverflow */
.cflow{position:absolute;left:0;top:250px;width:1920px;height:640px;perspective:2200px}
.cflow .cf{position:absolute;left:50%;top:40px;width:640px;height:470px;margin-left:-320px;border-radius:22px;overflow:hidden;background:linear-gradient(180deg,#eef2f7,#d5dde8);box-shadow:0 40px 120px rgba(0,0,0,.6)}
.cflow .cf img{width:100%;height:100%;object-fit:contain;padding:24px}
.cflow .cf.dark{background:linear-gradient(180deg,#0f1826,#060a12)}
.cf-cap{position:absolute;left:0;right:0;top:800px;text-align:center;font-size:40px;font-weight:700;letter-spacing:.06em}
.cf-cap small{display:block;font-size:20px;color:var(--ink3);letter-spacing:.3em;margin-top:10px;font-weight:400}

/* topology */
.topo{position:absolute;left:120px;top:330px;width:1680px;height:360px}
.topo svg{position:absolute;inset:0;overflow:visible}
.tnode{position:absolute;top:60px;width:400px;height:236px;padding:30px 34px;text-align:left}
.tnode .tn{font-size:44px;font-weight:700}
.tnode .tn em{font-style:normal;color:var(--ice)}
.tnode .td{font-size:22px;line-height:1.5;color:var(--ink2);margin-top:14px}
.tnode .ring{position:absolute;right:26px;top:26px;width:16px;height:16px;border-radius:50%;background:var(--ice);box-shadow:0 0 0 6px rgba(159,212,255,.15),0 0 24px var(--ice)}
.zhen{position:absolute;left:120px;top:770px;width:1680px;display:flex;gap:22px;perspective:1400px}
.zcard{flex:1;height:150px;border-radius:18px;background:linear-gradient(160deg,rgba(2,94,159,.55),rgba(10,22,40,.75));border:1px solid rgba(159,212,255,.25);display:flex;flex-direction:column;align-items:center;justify-content:center}
.zcard b{font-size:44px;line-height:1;color:#fff}
.zcard span{font-size:22px;color:var(--ink2);margin-top:14px;letter-spacing:.1em}

/* nine one-click */
.oc{position:absolute;width:440px;height:104px;padding:18px 24px 0 74px;border-radius:16px;background:var(--glass2);border:1px solid var(--line)}
.oc b{display:block;font-size:28px;line-height:1.2}
.oc span{display:block;font-size:18px;color:var(--ink2);margin-top:8px;line-height:1.35;white-space:nowrap}
.oc i{position:absolute;left:22px;top:30px;width:36px;height:36px;border-radius:50%;border:2px solid var(--ice);font-style:normal;font-size:17px;font-weight:700;color:var(--ice);display:flex;align-items:center;justify-content:center;font-family:"PIoT Sans",var(--font)}
.oc.flash{border-color:var(--ice);box-shadow:0 0 30px rgba(80,170,255,.45)}
.col-lab{position:absolute;font-size:20px;letter-spacing:.3em;color:var(--ice)}

/* fan cards */
.fan{position:absolute;left:0;top:250px;width:1920px;height:700px;perspective:2400px}
.fan .fc{position:absolute;left:50%;top:30px;width:960px;margin-left:-480px;border-radius:16px;overflow:hidden;border:1px solid var(--line);box-shadow:0 40px 100px rgba(0,0,0,.65);background:#0b0f16}
.fan .fc img{width:960px;height:540px;object-fit:cover}
.fan-cap{position:absolute;left:0;right:0;top:880px;text-align:center}
.fan-cap .h3{font-size:44px}

/* specs */
.spec{position:absolute;left:120px;top:300px;width:560px}
.spec .nm{font-size:60px;font-weight:700;line-height:1.15}
.spec .qty{display:inline-block;margin-top:18px;padding:6px 16px;border-radius:8px;background:rgba(2,94,159,.4);border:1px solid rgba(159,212,255,.35);font-size:22px}
.spec ul{list-style:none;margin-top:30px}
.spec li{font-size:26px;line-height:1.45;color:var(--ink2);padding:14px 0 14px 28px;border-top:1px solid var(--line);position:relative}
.spec li::before{content:"";position:absolute;left:2px;top:28px;width:10px;height:10px;border-radius:2px;background:var(--brand-hi);transform:rotate(45deg)}
.spec li b{color:var(--ink);font-weight:700}
.thumbs{position:absolute;left:120px;right:120px;top:930px;display:flex;gap:12px;justify-content:center}
.thumbs .btn{height:44px;font-size:19px;padding:0 20px}

/* sensors */
.sensor-list{position:absolute;left:120px;top:380px;width:640px}
.sensor{display:flex;align-items:flex-start;gap:26px;padding:16px 0;border-top:1px solid var(--line)}
.sensor .v{font-size:76px;line-height:1;font-weight:700;width:120px;text-align:right}
.sensor .t{padding-top:4px}
.sensor .t b{display:block;font-size:30px}
.sensor .t span{display:block;font-size:20px;color:var(--ink2);margin-top:6px}
.sweep-ring{position:absolute;border-radius:50%;background:conic-gradient(from 0deg,rgba(159,212,255,0) 0deg,rgba(159,212,255,0) 300deg,rgba(159,212,255,.35) 360deg);animation:spin 3.6s linear infinite;-webkit-mask:radial-gradient(circle,transparent 18%,#000 19%,#000 70%,transparent 71%);mask:radial-gradient(circle,transparent 18%,#000 19%,#000 70%,transparent 71%)}

/* gauges */
.gauge{position:absolute;width:300px;height:300px}
.gauge svg{width:100%;height:100%;transform:rotate(-90deg)}
.gauge .gv{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center}
.gauge .gv b{font-size:72px;line-height:1}
.gauge .gv > span{font-size:20px;color:var(--ink2);margin-top:10px;letter-spacing:.1em}

/* orbit */
.orb{position:absolute;width:300px}
.orb img{width:300px;height:205px;object-fit:cover;border-radius:14px;border:1px solid var(--line);box-shadow:0 24px 60px rgba(0,0,0,.6)}
.orb span{display:block;text-align:center;font-size:20px;margin-top:10px;color:var(--ink2);white-space:nowrap}
.orb-core{position:absolute;width:480px}
.orb-core img{width:480px;height:324px;object-fit:cover;border-radius:20px;border:1px solid rgba(159,212,255,.5);box-shadow:0 0 80px rgba(43,143,214,.35),0 40px 100px rgba(0,0,0,.7)}
.orb-core{z-index:10}
.orb-core span{position:absolute;left:50%;top:-58px;transform:translateX(-50%);white-space:nowrap;padding:6px 18px;border-radius:20px;background:rgba(2,94,159,.55);border:1px solid rgba(159,212,255,.4);font-size:22px;font-weight:700}

/* boards grid */
.boards{position:absolute;left:1150px;top:300px;width:660px;display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.board{border-radius:14px;overflow:hidden;border:1px solid var(--line);background:#0b1220;transition:border-color .3s,box-shadow .3s}
.board img{width:100%;height:150px;object-fit:cover}
.board span{display:block;padding:10px 14px;font-size:19px;color:var(--ink2);white-space:nowrap}
.board.hot{border-color:var(--ice);box-shadow:0 0 30px rgba(80,170,255,.45)}
.board.hot span{color:#fff}

/* digital human */
.doc{position:absolute;width:360px;height:440px;padding:30px 30px;border-radius:18px;background:linear-gradient(180deg,#f3f6fa,#dfe6ef);color:#0d1726;box-shadow:0 40px 100px rgba(0,0,0,.6)}
.doc b{font-size:28px;display:block}
.doc .ln{height:12px;border-radius:6px;background:#b9c6d6;margin-top:18px}
.beam{position:absolute;height:4px;border-radius:2px;background:linear-gradient(90deg,rgba(123,57,245,0),#7b39f5,#b48cff,rgba(123,57,245,0));box-shadow:0 0 22px rgba(123,57,245,.8)}
.outs{position:absolute;display:flex;gap:18px}

/* end */
#s-end .logo-layer{position:absolute;left:0;top:0;width:1920px;height:1080px;transform:translateY(-110px) scale(.8);transform-origin:50% 50%}
#s-end .logo-flow{opacity:0;filter:contrast(1.12)}

/* overview */
#overview{position:fixed;inset:0;z-index:100;background:rgba(3,6,12,.94);display:none;padding:70px 90px;overflow:auto;pointer-events:auto}
#overview.show{display:block}
#overview h3{font-size:22px;letter-spacing:.3em;color:var(--ice);margin-bottom:30px}
#overview .ov{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
#overview .ov a{display:block;padding:18px 20px;border-radius:12px;border:1px solid var(--line);color:var(--ink);text-decoration:none;font-size:18px;line-height:1.4;background:var(--glass)}
#overview .ov a:hover,#overview .ov a.cur{border-color:var(--ice)}
#overview .ov a small{display:block;color:var(--ink3);font-size:14px;letter-spacing:.12em;margin-bottom:6px}
#overview p{margin-top:28px;color:var(--ink3);font-size:16px;line-height:1.8}
@media (prefers-reduced-motion:reduce){.device.ai::before,.sweep-ring{animation:none}}
.book{position:absolute;left:60px;top:calc(var(--i) * 150px + 60px);width:440px;height:300px;border-radius:18px;padding:34px 36px;
  background:linear-gradient(150deg,rgba(43,143,214,.55),rgba(2,40,80,.85));border:1px solid rgba(159,212,255,.35);
  box-shadow:0 30px 80px rgba(0,0,0,.6);transform:rotateX(52deg) rotateZ(-28deg);transform-origin:50% 50%}
.book b{display:block;font-size:40px}
.book span{display:block;font-size:18px;letter-spacing:.4em;color:var(--ice);margin-top:12px}
.stack .st-img{position:absolute;left:0;top:0;width:960px;height:455px;object-fit:cover;border-radius:18px;border:1px solid var(--line);box-shadow:0 40px 100px rgba(0,0,0,.6);background:#eef2f6}
.kb{transform-origin:60% 50%}

/* ================= v2 · cinematic, restrained ================= */
:root{--hair:rgba(255,255,255,.14)}
.kicker{font-size:17px;letter-spacing:.42em;font-weight:400;color:rgba(159,212,255,.86);gap:18px}
.kicker::before{width:36px;height:1px;background:rgba(159,212,255,.6)}
.kicker i{font-style:normal;color:rgba(255,255,255,.35);margin:0 .1em}
.kicker.ai::before{background:rgba(180,140,255,.7)}
.glass{border-radius:16px}
/* HUD: minimal */
#hud-logo img{height:22px;opacity:.85}
#hud-logo span{font-size:14px;letter-spacing:.32em}
#hud-count{font-size:14px;letter-spacing:.3em}
#hud-count b{font-weight:400}
#rail{position:absolute;left:64px;right:64px;bottom:34px;height:26px;z-index:50;pointer-events:auto}
#rail .rl-lab{position:absolute;left:0;bottom:12px;font-size:13px;letter-spacing:.36em;color:rgba(255,255,255,.55);white-space:nowrap}
#rail .rl-lab i{font-style:normal;color:rgba(255,255,255,.28)}
#rail .rl-line{position:absolute;left:0;right:0;bottom:0;height:1px;display:flex;gap:6px}
#rail .seg{position:relative;height:1px;background:var(--hair);cursor:pointer}
#rail .seg::after{content:"";position:absolute;left:0;right:0;top:-8px;bottom:-8px}
#rail .seg .fill{position:absolute;left:0;top:0;bottom:0;width:0;background:rgba(159,212,255,.75);transition:width 1s cubic-bezier(.45,0,.55,1)}
body.clean #rail{opacity:0}

/* dip · title card */
#dip{position:absolute;inset:0;z-index:60;background:#000;display:none;pointer-events:none}
#titlecard{position:absolute;inset:0;z-index:70;display:none;pointer-events:none;text-align:center}
#titlecard .tc-ch{position:absolute;left:0;right:0;top:452px;font-size:16px;letter-spacing:.6em;color:rgba(159,212,255,.8);font-family:"PIoT Sans",var(--font)}
#titlecard .tc-title{position:absolute;left:0;right:0;top:500px;font-size:52px;font-weight:300;letter-spacing:.22em;color:#eef4fb}
#titlecard .tc-line{position:absolute;left:50%;top:600px;width:120px;margin-left:-60px;height:1px;background:rgba(159,212,255,.6)}

/* film slots */
.film-slot{position:absolute;inset:0;overflow:hidden;display:none;transform-origin:56% 50%}
.film-slot img.poster,.film-slot video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.film-slot img.poster{display:none}
.scene.mode-film .film-slot{display:block}
.scene .live-only{display:none}
.scene.mode-live .live-only{display:flex}
.scene.mode-live span.live-only{display:inline-flex}
.film-slot::after{content:"";position:absolute;inset:0;pointer-events:none;background:linear-gradient(90deg,rgba(3,6,12,.88) 0%,rgba(3,6,12,.55) 32%,rgba(3,6,12,0) 58%),linear-gradient(0deg,rgba(3,6,12,.55),rgba(3,6,12,0) 28%)}
#s-cover .film-slot::after,#s-end .film-slot::after{background:radial-gradient(ellipse at 50% 45%,transparent 35%,rgba(3,6,12,.7) 100%)}
#s-inspect .shade-l{display:none}
/* turntable scenes in film mode: video is full-bleed, live slot unused */
.scene.mode-film .tt-slot{pointer-events:none}

/* lower third */
.l3{position:absolute;right:120px;bottom:168px;display:flex;flex-direction:column;align-items:flex-end;gap:10px;padding-right:22px;border-right:1px solid rgba(159,212,255,.5);text-align:right}
.l3-ch{font-size:13px;letter-spacing:.42em;color:rgba(159,212,255,.8)}
.l3-ch i{font-style:normal;color:rgba(255,255,255,.3)}
.l3-t{font-size:22px;font-weight:300;letter-spacing:.16em;color:#e6eef8}

/* ================= v3 · hero / camera motion ================= */
.kicker{font-size:19px;font-weight:500;letter-spacing:.38em;color:var(--ice)}
.h1,.h2{font-weight:700}
.stat .v{text-shadow:0 0 40px rgba(43,143,214,.45)}
.grad{text-shadow:none}
/* mask-reveal headline lines */
.ml{display:block;overflow:hidden;padding-bottom:.06em;margin-bottom:-.06em}
.ml>.mi{display:block;will-change:transform}
/* scenes animate as camera layers */
.scene{transform-origin:50% 50%;backface-visibility:hidden}
.scene.moving{will-change:transform,opacity}
/* ---- chapter opener hero ---- */
.scene[data-opener]{background:transparent}
.hero-media{position:absolute;inset:-60px;transform-origin:50% 50%}
.hero-media .hero-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hero-media .film-slot{display:block}
.hero-media .film-slot::after{background:none}
.hero-media .cut,.hero-media .cut-glow{position:absolute;left:47%;top:22%;width:50%;height:auto}
.hero-media .cut-glow{opacity:.95}
#s-op2 .hero-media .cut,#s-op2 .hero-media .cut-glow{left:52%;top:27%;width:44%}
#s-op6 .hero-media .cut,#s-op6 .hero-media .cut-glow{left:50%;top:26%;width:44%}
#s-op7 .hero-media .cut,#s-op7 .hero-media .cut-glow{left:54%;top:27%;width:40%}
#s-op8 .hero-media .hero-img{opacity:.42}
#s-op1 .hero-media .hero-img{opacity:.72}
.hero-slot{z-index:1}
.hero-shade{position:absolute;inset:0;pointer-events:none;background:linear-gradient(90deg,rgba(2,5,11,.92) 0%,rgba(2,5,11,.55) 34%,rgba(2,5,11,0) 62%),linear-gradient(0deg,rgba(2,5,11,.75),rgba(2,5,11,0) 36%),radial-gradient(ellipse at 70% 40%,rgba(2,94,159,0) 30%,rgba(2,5,11,.5) 100%)}
.rays{position:absolute;left:50%;top:-200px;width:2000px;height:1300px;margin-left:-1000px;pointer-events:none;transform-origin:50% 18%;
  background:repeating-conic-gradient(from 160deg at 50% 18%,rgba(120,190,255,.0) 0deg,rgba(120,190,255,.12) 2.2deg,rgba(120,190,255,0) 5deg,rgba(120,190,255,0) 9deg);
  -webkit-mask-image:radial-gradient(ellipse 46% 60% at 50% 18%,#000 0%,rgba(0,0,0,.45) 45%,transparent 78%);mask-image:radial-gradient(ellipse 46% 60% at 50% 18%,#000 0%,rgba(0,0,0,.45) 45%,transparent 78%)}
.rays::after{content:"";position:absolute;left:50%;top:18%;width:900px;height:500px;margin:-250px -450px;background:radial-gradient(ellipse,rgba(160,215,255,.35),rgba(43,143,214,.12) 40%,transparent 70%)}
.bokeh{position:absolute;inset:0;pointer-events:none}
.bokeh i{position:absolute;border-radius:50%;background:radial-gradient(circle,rgba(159,212,255,.55) 0%,rgba(43,143,214,.18) 45%,transparent 70%)}
.hero-txt{position:absolute;left:150px;bottom:205px;width:1300px;z-index:3}
.hero-txt.top{bottom:205px}
.hero-ch{font-size:20px;letter-spacing:.6em;color:var(--ice);font-family:"PIoT Sans",var(--font);margin-bottom:26px}
.hero-ch i{font-style:normal;color:rgba(255,255,255,.35)}
.hero-title{font-size:132px;line-height:1.08;font-weight:700;letter-spacing:.02em;color:#fff;text-shadow:0 0 30px rgba(43,143,214,.4)}
.hero-sub{margin-top:30px;font-size:34px;letter-spacing:.18em;color:var(--ink2,#c7d6e6);font-weight:500}
.lstreak{position:absolute;left:-200px;top:-14px;width:520px;height:2px;background:linear-gradient(90deg,transparent,#bfe4ff 60%,#fff 80%,transparent);box-shadow:0 0 18px 3px rgba(120,190,255,.7);opacity:0;border-radius:2px}
.giant{position:absolute;right:120px;top:190px;text-align:right;z-index:3;transform-origin:85% 50%;pointer-events:none}
.giant .gv{font-size:300px;line-height:.9;color:#fff;letter-spacing:-.03em;text-shadow:0 0 24px rgba(60,160,235,.75)}
.giant::before{content:"";position:absolute;left:-12%;right:-12%;top:-30%;bottom:-10%;background:radial-gradient(ellipse at 55% 45%,rgba(43,143,214,.42),rgba(2,94,159,.16) 45%,transparent 70%);z-index:-1;pointer-events:none}
.giant .gu{font-size:84px;font-weight:700;color:var(--ice);margin-left:16px;letter-spacing:.04em;font-family:"PIoT Sans",var(--font)}
.giant .gk{font-size:28px;letter-spacing:.4em;color:rgba(220,236,255,.85);margin-top:18px}
#s-op5 .giant{top:150px}
/* ---- transition overlays ---- */
#leak{position:absolute;inset:0;z-index:62;pointer-events:none;opacity:0;overflow:hidden}
#leak i{position:absolute;border-radius:50%}
#leak .a{left:-20%;top:-40%;width:140%;height:180%;background:radial-gradient(ellipse at 50% 50%,rgba(255,255,255,.95) 0%,rgba(170,220,255,.75) 18%,rgba(43,143,214,.45) 38%,transparent 64%)}
#leak .b{left:-35%;top:10%;width:90%;height:90%;background:radial-gradient(circle,rgba(2,94,159,.9),transparent 65%)}
#leak .c{right:-30%;top:-30%;width:80%;height:110%;background:radial-gradient(circle,rgba(150,205,255,.7),transparent 62%)}
#whip{position:absolute;inset:0;z-index:61;pointer-events:none;opacity:0;overflow:hidden}
#whip i{position:absolute;left:-50%;top:0;width:200%;height:100%;
  background:repeating-linear-gradient(0deg,transparent 0,transparent 9px,rgba(159,212,255,.10) 10px,transparent 12px,transparent 31px,rgba(255,255,255,.18) 32px,transparent 33px,transparent 57px),linear-gradient(90deg,transparent,rgba(43,143,214,.35) 40%,rgba(200,235,255,.45) 50%,rgba(43,143,214,.35) 60%,transparent)}
#morph{position:absolute;inset:0;z-index:63;pointer-events:none;display:none}
#morph img{position:absolute;left:0;top:0;transform-origin:0 0;object-fit:cover;border-radius:12px}
/* depth glow behind live 3D product */
.slot::before{content:"";position:absolute;left:10%;right:10%;top:20%;bottom:5%;background:radial-gradient(ellipse at 50% 60%,rgba(43,143,214,.22),transparent 65%);pointer-events:none}
.hero-slot::before{display:none}
#s-op3 .giant,#s-op6 .giant{left:150px;right:auto;top:150px;text-align:left;transform-origin:15% 50%}
#s-op3 .giant .gv,#s-op6 .giant .gv{font-size:180px}
#s-op3 .giant .gu{font-size:60px}
#s-op1 .giant .gk{font-size:24px;letter-spacing:.2em}
.hero-shade{z-index:1}.hero-media{z-index:0}.rays{z-index:2}.bokeh{z-index:2}
.giant .gk{text-shadow:0 2px 12px rgba(0,0,0,.9)}
.rays,.bokeh i,.hero-media,.giant,.cut,.cut-glow,.lstreak,.tilt-wrap,.film-slot,.cflow .cf,.fc,.st-img,.orb,.book{will-change:transform}
/* ---- v3.1 robot car family: hero lineup ---- */
#s-cars .fam{position:absolute;left:0;top:0;width:1920px;height:1080px;perspective:1800px;perspective-origin:50% 40%}
#s-cars .fam-track{position:absolute;left:0;top:380px;width:1920px;height:360px;transform-style:preserve-3d;will-change:transform}
#s-cars .car{position:absolute;top:0;width:290px;height:360px;transform-style:preserve-3d;will-change:transform,opacity}
#s-cars .car-b{position:absolute;left:0;top:0;width:290px;height:270px}
#s-cars .car-b img{position:absolute;left:0;top:0;width:100%;height:100%;object-fit:contain;object-position:50% 100%}
#s-cars .car-g{opacity:0;will-change:opacity}
#s-cars .car-r{top:100% !important;height:60% !important;object-position:50% 0 !important;transform:scaleY(-1);transform-origin:50% 0;opacity:.18;
  -webkit-mask-image:linear-gradient(0deg,rgba(0,0,0,.9),transparent 70%);mask-image:linear-gradient(0deg,rgba(0,0,0,.9),transparent 70%)}
#s-cars .car-n{position:absolute;left:-20px;right:-20px;top:300px;text-align:center;font-size:19px;letter-spacing:.06em;color:rgba(214,230,246,.7);white-space:nowrap}
#s-cars .car-n b{display:block;font-size:15px;letter-spacing:.3em;color:var(--ice);margin-bottom:4px;font-weight:500}
#s-cars .car.on .car-n{color:#fff}
#s-cars .fam-sweep{position:absolute;left:0;top:-80px;width:220px;height:520px;background:linear-gradient(90deg,transparent,rgba(160,215,255,.0) 20%,rgba(190,230,255,.38) 50%,rgba(160,215,255,0) 80%,transparent);transform:translateX(-400px) skewX(-14deg);opacity:0;will-change:transform,opacity;pointer-events:none}
#s-cars .fam-floor{position:absolute;left:-10%;right:-10%;top:650px;height:440px;background:radial-gradient(ellipse 50% 40% at 50% 0%,rgba(47,111,237,.32),rgba(2,94,159,.12) 45%,transparent 75%)}
#s-cars .fam-floor::before{content:"";position:absolute;left:15%;right:15%;top:0;height:2px;background:linear-gradient(90deg,transparent,rgba(159,212,255,.85),transparent);box-shadow:0 0 22px 4px rgba(47,111,237,.55)}
#s-cars .fam-rays{position:absolute;left:50%;top:-260px;width:2000px;height:1200px;margin-left:-1000px;pointer-events:none;will-change:transform,opacity;
  background:repeating-conic-gradient(from 160deg at 50% 22%,rgba(120,190,255,0) 0deg,rgba(120,190,255,.10) 2.4deg,rgba(120,190,255,0) 5deg,rgba(120,190,255,0) 9deg);
  -webkit-mask-image:radial-gradient(ellipse 44% 58% at 50% 22%,#000,rgba(0,0,0,.4) 45%,transparent 78%);mask-image:radial-gradient(ellipse 44% 58% at 50% 22%,#000,rgba(0,0,0,.4) 45%,transparent 78%)}
#s-cars .fam-cap{position:absolute;left:0;right:0;top:858px;text-align:center}
#s-cars .fam-cap .cap-t{font-size:46px;font-weight:700;letter-spacing:.06em}
#s-cars .fam-cap small{display:block;margin-top:10px;font-size:16px;letter-spacing:.4em;color:var(--ice)}
/* ---- CH03 sandbox hero (real look: dark deck, road loops, lane markings) ---- */
.sbx{position:absolute;will-change:transform}
.sbx img{position:absolute;left:0;top:0;width:100%;height:100%}
.sbx .sbx-g{opacity:.85}
.sbx-sweep{position:absolute;inset:0;overflow:hidden;pointer-events:none;-webkit-mask-image:url(../assets/img/ch03/sandbox-hero.webp);mask-image:url(../assets/img/ch03/sandbox-hero.webp);-webkit-mask-size:100% 100%;mask-size:100% 100%}
.sbx-sweep i{position:absolute;top:-20%;left:0;width:22%;height:140%;background:linear-gradient(90deg,transparent,rgba(170,220,255,.28) 50%,transparent);transform:translateX(-120%) skewX(-18deg);will-change:transform}
.sbx-bc i{position:absolute;width:18px;height:18px;margin:-9px;border-radius:50%;background:radial-gradient(circle,#e8f6ff 0%,rgba(90,180,255,.85) 30%,rgba(47,111,237,0) 70%);will-change:transform,opacity}
/* ---- CH06 embedded: hero car + 6 module cards, precise two-column composition ---- */
#s-embedded .emsvg{position:absolute;left:0;top:0;pointer-events:none}
#s-embedded .eml{fill:none;stroke:rgba(90,170,255,.55);stroke-width:2}
#s-embedded .emc{position:absolute;width:250px;will-change:transform,opacity}
#s-embedded .emc img{display:block;width:250px;height:150px;object-fit:cover;border-radius:12px;border:1px solid rgba(159,212,255,.28);box-shadow:0 18px 50px rgba(0,0,0,.55)}
#s-embedded .emc span{display:flex;align-items:baseline;gap:10px;margin-top:12px;font-size:19px;color:var(--ink2,#c7d6e6);white-space:nowrap}
#s-embedded .emc span b{font-size:14px;letter-spacing:.2em;color:var(--ice);font-weight:500}
#s-embedded .emc.hot img{border-color:rgba(159,212,255,.9);box-shadow:0 0 0 1px rgba(159,212,255,.6),0 0 40px rgba(47,111,237,.55),0 18px 50px rgba(0,0,0,.55)}
#s-embedded .emcar{position:absolute;will-change:transform}
#s-embedded .emcar img{position:absolute;left:0;top:0;width:100%;height:100%;object-fit:contain}
#s-embedded .emcar-cap{position:absolute;text-align:center}
#s-embedded .emcar-cap b{display:block;font-size:30px;font-weight:700;letter-spacing:.08em}
#s-embedded .emcar-cap small{display:block;margin-top:8px;font-size:18px;letter-spacing:.2em;color:var(--ice)}
/* ================= v3.2 · director review: highlight cap, full-bleed frame, type system ================= */
:root{--ink:#E6EAF0;--ink2:#B8C2CF;--ink3:#8592A3;--glass:linear-gradient(160deg,rgba(26,36,50,.92),rgba(16,24,36,.92))}
html,body{background:radial-gradient(ellipse 90% 80% at 50% 45%,#0A1220 0%,#05080F 100%)}
.glass{backdrop-filter:none;-webkit-backdrop-filter:none;background:var(--glass)}
/* type system: H1 64/700, eyebrow 18/.3em, body 22 */
.h2,.h1:not(.hero-title){font-size:64px !important;font-weight:700;line-height:1.18;color:var(--ink)}
.kicker{font-size:18px;letter-spacing:.3em}
.lead{font-size:22px;line-height:1.6}
.hero-title{color:var(--ink)}
/* UI screenshots never hotter than the type */
.device video,.device img,.board img,.emc img,.acard img,.film img,.wall img{filter:brightness(.86)}
/* giant numbers: soft vertical gradient instead of pure white */
.giant .gv,.stat .v{background:linear-gradient(180deg,#F2F5F9 0%,#C9D6E6 100%);-webkit-background-clip:text;background-clip:text;color:transparent;text-shadow:none}
.giant .gv{font-size:220px !important}
.giant .gu{font-size:64px !important}
.giant::before{background:radial-gradient(ellipse at 55% 50%,rgba(5,8,15,.6),rgba(5,8,15,.35) 45%,transparent 72%)}
/* rays read as template: removed */
.rays,.fam-rays{display:none}
/* light pool under live 3D products + dark glow only */
.slot::before{left:8%;right:8%;top:auto;bottom:-2%;height:30%;background:radial-gradient(ellipse 50% 50% at 50% 50%,#121B28 0%,rgba(18,27,40,.6) 45%,transparent 72%)}
.pool{position:absolute;pointer-events:none;background:radial-gradient(ellipse 50% 50% at 50% 50%,#121B28 0%,rgba(18,27,40,.55) 45%,transparent 72%)}
/* footage with saturated blue structures: left reading gradient + vignette */
.film-slot::after{background:linear-gradient(90deg,rgba(5,8,15,.92) 0%,rgba(5,8,15,.6) 30%,rgba(5,8,15,0) 47%),radial-gradient(ellipse 80% 80% at 60% 50%,transparent 40%,rgba(5,8,15,.6) 100%),linear-gradient(0deg,rgba(5,8,15,.6),transparent 30%)}
#s-port-kit .film-slot video,#s-port .film-slot video,#s-op4 .film-slot video{filter:saturate(.72) brightness(.82)}
.hero-media .cut{filter:saturate(.78) brightness(.92)}
.cut-glow,.car-g,.sbx-g{opacity:.6}
.oc{transition:border-color .45s cubic-bezier(.2,.8,.2,1),box-shadow .45s cubic-bezier(.2,.8,.2,1),background-color .45s}
#rail .seg .fill{width:100% !important;transform:scaleX(var(--f,0));transform-origin:0 50%;transition:transform 1s cubic-bezier(.45,0,.55,1)}
#s-agenda .grid{perspective:1600px}
#s-course .books,#s-course{perspective:1800px}

/* ================= v3.3 · product + director + motion review pass ================= */
/* robot IP sprite (rendered from robot-ip GLB, idle pose): consistent size, ground contact, never over UI */
.ipbot{position:absolute;z-index:4;pointer-events:none;will-change:transform}
.ipbot img{position:absolute;left:0;top:0;width:100%;height:100%;object-fit:contain;filter:brightness(.92)}
.ip-pool{position:absolute;left:-30%;right:-30%;bottom:-6%;height:22%;border-radius:50%;background:radial-gradient(ellipse 50% 50% at 50% 50%,#121B28 0%,rgba(18,27,40,.65) 45%,transparent 72%)}
.ipbot::after{content:"";position:absolute;left:12%;right:12%;bottom:1%;height:5%;border-radius:50%;background:radial-gradient(ellipse at 50% 50%,rgba(3,6,12,.85),transparent 70%)}
.robot-slot .robot-poster{position:absolute;left:50%;bottom:4%;height:86%;transform:translateX(-50%);filter:brightness(.92);opacity:1;transition:opacity .8s}
.robot-slot.live .robot-poster{opacity:0}
.robot-slot .ip-pool{left:10%;right:10%;bottom:0;height:16%}
#s-cover .logo-layer,#s-end .logo-layer{filter:brightness(.9)}
#hud-logo img{filter:brightness(.9)}
/* agenda: every thumbnail on the same dark ground, cutouts contained; sub line fills the card */
.acard .ai{height:170px;background:radial-gradient(ellipse 70% 80% at 50% 70%,#132033,#0B1424);overflow:hidden}
.acard .ai img{width:100%;height:170px;object-fit:cover;opacity:.9}
.acard .ai.cut img{object-fit:contain;padding:12px 18px;opacity:1}
.acard .n{top:98px;color:#E6EAF0}
.acard .s{padding:8px 22px 0;font-size:16px;letter-spacing:.06em;color:var(--ink3)}
/* accum: pills, grid-aligned cards (right edge 1800), 20px captions */
#s-accum .hexes{display:flex;gap:12px;margin-top:40px}
#s-accum .hexes .chip{height:44px;font-size:20px}
#s-accum .cnt-card{width:380px}
.film figure{width:398px}.film img{width:398px;height:200px}
.film figcaption{font-size:20px}
/* honor: certificate marquee + award-chip marquee, 160px edge fades */
.wall{-webkit-mask-image:linear-gradient(90deg,transparent 0,#000 160px,#000 calc(100% - 360px),transparent calc(100% - 200px));mask-image:linear-gradient(90deg,transparent 0,#000 160px,#000 calc(100% - 360px),transparent calc(100% - 200px))}
.wall img{box-shadow:none;opacity:.86}
.awards{left:0;width:1920px;flex-wrap:nowrap;overflow:hidden;-webkit-mask-image:linear-gradient(90deg,transparent,#000 160px,#000 1760px,transparent);mask-image:linear-gradient(90deg,transparent,#000 160px,#000 1760px,transparent)}
.aw-track{display:flex;gap:14px;flex:none;will-change:transform}
.awards .chip{flex:none;height:44px;font-size:20px}
@keyframes mq{from{transform:translate3d(0,0,0)}to{transform:translate3d(-50%,0,0)}}
.aw-track.run{animation:mq 40s linear infinite}
/* cars: all six readable, 18px counter */
#s-cars .fam-cap small{font-size:18px}
/* topo: dark cards, brand hairline */
.zcard{background:#0B1A2C;border:1px solid #025e9f}
.zcard b{color:#E6EAF0}
.tnode .td{font-size:22px}
/* oneclick: one baseline */
.col-lab{font-size:20px}
/* analytics caption under H1 hierarchy */
.fan-cap .h3{font-size:28px;letter-spacing:.12em;color:var(--ink2)}
/* device crops: soft 40px edge fade instead of hard-cut UI */
.device .screen::after{content:"";position:absolute;inset:0;pointer-events:none;box-shadow:inset 40px 0 40px -20px rgba(5,8,15,.55),inset -40px 0 40px -20px rgba(5,8,15,.55)}
/* product stage (photographic renders on dark, rim light + light pool) — replaces untextured live GLBs */
.kit{position:absolute;perspective:1600px}
.kit-i{position:absolute;inset:0;opacity:0;will-change:transform,opacity}
.kit-i img,.isi img{position:absolute;left:0;top:0;width:100%;height:100%;object-fit:contain;object-position:50% 88%}
.kit-g{opacity:.5}
.kit-pool{left:6%;right:6%;bottom:-2%;height:22%}
.pool{border-radius:50%}
#s-port-kit .kit-im{filter:saturate(.78) brightness(.94)}
#s-port-kit .kit-g{opacity:.32}
.spec .nm .qty{display:inline-block;vertical-align:middle;margin:0 0 0 14px;font-size:22px;padding:4px 14px}
.spec{transition:none}
/* port: left reading gradient over the saturated blue structure, ㎡ spacing */
.port-shade{z-index:0;background:linear-gradient(90deg,rgba(5,8,15,.92) 0%,rgba(5,8,15,.7) 30%,rgba(5,8,15,.0) 47%)}
#s-port .film-slot::after{background:radial-gradient(ellipse 80% 80% at 60% 50%,transparent 40%,rgba(5,8,15,.6) 100%),linear-gradient(0deg,rgba(5,8,15,.6),transparent 30%)}
.sq{font-size:.62em;margin-left:.06em;vertical-align:.32em}
.giant .gu{vertical-align:baseline}
#s-op4 .film-slot video,#s-op4 .film-slot img{filter:saturate(.62) brightness(.78)}
/* course: cards with two-line body, books side-by-side readable (no overlap) */
.ccard{width:400px;height:220px;padding:30px 32px}
.ccard .small{margin-top:14px;font-size:20px;line-height:1.6;color:var(--ink2)}
#s-course .book{left:40px;top:calc(var(--i) * 150px);width:520px;height:124px;padding:26px 34px;transform:rotateY(-16deg) rotateX(6deg) !important}
#s-course .book b{font-size:34px}
#s-course .book span{font-size:15px;margin-top:8px}
/* inspect: list numerals in neutral ice, not the H1 accent */
.sensor .v{color:#9fd4ff;background:none;-webkit-text-fill-color:currentColor}
/* inspect2: cutouts on a light pool */
.istk .isi{position:absolute;inset:0;opacity:0;will-change:transform,opacity}
/* CH05 opener: giant number moves to the empty lower right, off the car's camera mast */
#s-op5 .giant{top:auto;bottom:130px}
/* CH06/07 opener products: desaturate PCB colours, keep inside the frame */
#s-op6 .hero-media .cut{filter:saturate(.62) brightness(.9)}
#s-op7 .hero-media .cut,#s-op7 .hero-media .cut-glow{left:50%;top:26%;width:38%}
#s-op7 .hero-media .cut{filter:saturate(.7) brightness(.9)}
#s-op6 .giant .gv{font-size:220px !important}
#s-op6 .giant .gu{font-size:64px !important}
/* CH08 opener: footage at native scale, readable */
#s-op8 .hero-media .hero-img{opacity:.6}
/* embedded: strict 3×3 grid */
#s-embedded .emc{width:300px;height:200px;border-radius:14px;overflow:hidden;border:1px solid rgba(159,212,255,.28);background:#0B1424;box-shadow:0 18px 50px rgba(0,0,0,.5);transition:border-color .45s,box-shadow .45s}
#s-embedded .emc img{width:300px;height:200px;border:0;border-radius:0;box-shadow:none;object-fit:cover}
#s-embedded .emc span{position:absolute;left:0;right:0;bottom:0;margin:0;padding:34px 16px 12px;font-size:20px;color:#E6EAF0;background:linear-gradient(0deg,rgba(5,8,15,.92),rgba(5,8,15,.6) 60%,transparent)}
#s-embedded .emc span b{font-size:14px}
#s-embedded .emc.hot{border-color:rgba(159,212,255,.9);box-shadow:0 0 0 1px rgba(159,212,255,.5),0 0 36px rgba(47,111,237,.45)}
#s-embedded .emc.hot img{border:0;box-shadow:none}
#s-embedded .emcell{position:absolute;border-radius:18px;background:radial-gradient(ellipse 70% 70% at 50% 55%,#121B28,#0B1424 80%);border:1px solid rgba(159,212,255,.22)}
#s-embedded .emcar .cut{filter:saturate(.7) brightness(.92)}
#s-embedded .emcar-cap{left:0;right:0;bottom:18px;text-align:center}
#s-embedded .emcar-cap b{font-size:26px}
#s-embedded .emcar-cap small{font-size:16px;margin-top:6px}
/* python: larger board labels */
.board span{font-size:20px;color:#C9D3DF}
/* dh: glass manuscript card (no white card) */
.doc.glass{background:var(--glass);color:var(--ink);border:1px solid var(--line)}
.doc.glass .ln{background:rgba(159,212,255,.22)}
/* motion: neighbouring scenes get their layers before the move starts; counters never reflow */
.scene.pre{will-change:transform,opacity}
.num[data-count]{display:inline-block;text-align:right}
.scene.moving .glass{backdrop-filter:none;-webkit-backdrop-filter:none}
/* v3.3b */
#s-cover .logo-flow,#s-end .logo-flow{mix-blend-mode:screen}
.ip-pool{bottom:1%;height:15%}
.ipbot::after{bottom:7%}
.robot-slot .robot-poster{bottom:-2%;height:100%}
.robot-slot .ip-pool{bottom:-2%}
.wall{-webkit-mask-image:linear-gradient(90deg,transparent 0,#000 380px,#000 1900px,transparent 2250px);mask-image:linear-gradient(90deg,transparent 0,#000 380px,#000 1900px,transparent 2250px)}
#s-cars .car-n{left:-6px;right:-6px;font-size:18px}
.tnode{height:200px}
.sbx-sweep{-webkit-mask-image:none;mask-image:none}
.sbx-sweep i{top:0;height:100%;width:24%;background:none;overflow:hidden;transform:none;-webkit-mask-image:linear-gradient(90deg,transparent,#000 50%,transparent);mask-image:linear-gradient(90deg,transparent,#000 50%,transparent)}
.sbx-sweep i img{position:absolute;left:0;top:0;height:100%;max-width:none;filter:brightness(1.8) saturate(1.15);opacity:.5;will-change:transform}
#s-cover .logo-layer,#s-end .logo-layer{filter:none}
#s-cover .logo-flow,#s-end .logo-flow{filter:contrast(1.12) brightness(.9)}
#s-op7 .hero-media .cut,#s-op7 .hero-media .cut-glow{left:52%;top:24%;width:34%}
#s-op8 .hero-media .hero-img{inset:auto;left:46%;top:17%;width:50%;height:auto;object-fit:contain;opacity:.92;border-radius:16px;border:1px solid rgba(159,212,255,.22);box-shadow:0 40px 120px rgba(0,0,0,.7);filter:brightness(.86)}
#s-course .book{left:0;width:420px}
.kit-i{inset:4% 7% 0 7%}
#s-cover .logo-flow,#s-end .logo-flow{mix-blend-mode:normal}
#s-cover .logo-layer,#s-end .logo-layer{mix-blend-mode:screen}
#s-op8 .hero-media .hero-img{left:45%;width:46%}
.sbx .sbx-i{filter:brightness(.88)}

/* ============================================================ r4 (director r3 / motion r3 / product r3) */
/* presentation mode: no key-hint on the cover (keys stay listed in the O overview) */
#s-cover .cover-hint{display:none}
/* p01/p32 logo white → #D6DCE4 (luma ≈219) */
#s-cover .logo-flow,#s-end .logo-flow{filter:contrast(1.12) brightness(.84)}
/* giant numbers: #DDE3EB → #AFC0D4, top luma ≤225 */
.giant .gv,.stat .v{background:linear-gradient(180deg,#DBE1E9 0%,#AFC0D4 100%);-webkit-background-clip:text;background-clip:text;color:transparent;text-shadow:none}
/* p02: chapter-08 thumbnail is a light UI recording */
.acard[data-goch="8"] img{filter:brightness(.68)}
/* p07: cloud/edge/device illustration desaturated (S −35%+) */
#s-op2 .hero-media .cut{filter:saturate(.55) brightness(.9)}
#s-op2 .hero-media .cut-glow{opacity:.35}
/* p12: crop the recording to the code area (half-cut file tree removed) */
#s-diagnose .device .screen video,#s-diagnose .device .screen img.poster{transform:scale(1.11);transform-origin:100% 50%}
/* p06: selected car grows upward from its label line — all 6 labels stay on one baseline */
#s-cars .car{transform-origin:50% 300px}
/* p18: bus ≈640 px wide, highlights pulled down, glow lowered */
#s-icv-kit .kit-i[data-slug="bus"]{inset:18% 19% 4% 19%}
#s-icv-kit .kit-i[data-slug="bus"] .kit-im{filter:brightness(.84) saturate(.82) contrast(.92)}
#s-icv-kit .kit-i[data-slug="bus"] .kit-g{opacity:.28}
/* p19/p20: clean full-sandbox hero on dark negative space */
.port-h .sbx-i{filter:brightness(.92)}
.port-h .sbx-g{opacity:.5}
.port-h .pool{position:absolute;border-radius:50%;background:radial-gradient(ellipse 50% 50% at 50% 50%,#121B28 0%,rgba(18,27,40,.6) 50%,transparent 74%)}
#s-op4 .giant{top:84px;right:120px}
#s-op4 .giant .gv{font-size:200px}
#s-port::before{content:"";position:absolute;left:0;right:0;top:0;height:140px;background:linear-gradient(180deg,rgba(5,8,15,.7),rgba(5,8,15,0));z-index:1;pointer-events:none}
/* p23: 157 into the empty top-right, 220 px tall, off the product */
#s-op5 .giant{top:70px;right:110px}
#s-op5 .giant .gv{font-size:220px}
#s-op5 .giant .gu{font-size:64px}
#s-op5 .giant .gk{font-size:24px;margin-top:10px}
/* p25: white body panels ×0.9 */
#s-inspect2 .isi img{filter:brightness(.8) contrast(.96)}
/* p26: PCB red battery S −25% */
#s-op6 .hero-media .cut{filter:saturate(.58) brightness(.9)}
/* p27: card labels 22 px */
#s-embedded .emc span{font-size:22px}
/* robot IP: light sweep across the shell (window + counter-moving brightened copy; no url() masks) */
.ipbot .ip-sw{position:absolute;inset:0;overflow:hidden;pointer-events:none}
.ipbot .ip-sw i{position:absolute;top:0;left:0;width:34%;height:100%;overflow:hidden;-webkit-mask-image:linear-gradient(90deg,transparent,#000 50%,transparent);mask-image:linear-gradient(90deg,transparent,#000 50%,transparent);will-change:transform}
.ipbot .ip-sw i img{position:absolute;left:0;top:0;height:100%;max-width:none;object-fit:contain;filter:brightness(1.5) saturate(1.1);opacity:.45;will-change:transform}
/* chapter light-leak: dim cool glow, no milky white (peak luma ≤160) */
#leak .a{background:radial-gradient(ellipse at 50% 50%,rgba(120,170,215,.42) 0%,rgba(70,130,200,.32) 20%,rgba(43,110,190,.2) 40%,transparent 64%)}
#leak .b{background:radial-gradient(circle,rgba(2,94,159,.55),transparent 65%)}
#leak .c{background:radial-gradient(circle,rgba(110,160,220,.3),transparent 62%)}

/* ============================================================ r5 */
/* p07 / p26: desaturation that actually lands — the cutout AND its glow AND the bokeh (glow was a saturated #2F6FED halo) */
#s-op2 .hero-media .cut{filter:saturate(.22) brightness(.88)}
#s-op6 .hero-media .cut{filter:saturate(.34) brightness(.88)}
#s-op2 .hero-media .cut-glow,#s-op6 .hero-media .cut-glow{filter:saturate(.25) brightness(.55)}
#s-op2 .bokeh,#s-op6 .bokeh{filter:saturate(.3)}
/* T1/T4: title rows are no longer clipping masks (no sliced glyphs mid-transition) */
.ml{overflow:visible}
/* p27: solid backing strip under every system label (no PCB silkscreen behind the text) */
#s-embedded .emc span{background:rgba(6,10,18,.7);padding:9px 16px 10px;backdrop-filter:none}
/* p18: bus grade is baked into bus.webp (sat .65, highlights soft-clipped ≤ #C8CCD2, emblem removed) — no extra CSS grade; ≤45% frame width */
#s-icv-kit .kit-i[data-slug="bus"] .kit-im{filter:none}
#s-icv-kit .kit-i[data-slug="bus"]{inset:18% 19% 4% 19%}
/* p21 HQ swap slot */
.kit-im.hq{object-fit:contain}
.kit-im.hq-opaque{-webkit-mask-image:radial-gradient(ellipse 62% 62% at 50% 52%,#000 62%,transparent 100%);mask-image:radial-gradient(ellipse 62% 62% at 50% 52%,#000 62%,transparent 100%)}
.kit-g.hq{filter:blur(26px) saturate(.5) brightness(.6)}
/* p27: push the board's own silkscreen label below the card edge so it never sits behind the caption */
#s-embedded .emc img{transform:scale(1.18);transform-origin:50% 0}
/* p10/12/15 (old recordings, final): a touch darker so the light UI sits in the dark deck; text stays readable */
#s-follow .device video,#s-follow .device img,#s-diagnose .device video,#s-diagnose .device img,#s-oneclick .device video,#s-oneclick .device img{filter:brightness(.8) contrast(1.04)}

/* ============================================================ r6 */
/* p18 (product r5): bus / off-road / ambulance are the same real size (16×22×15 cm) → identical box, width-limited:
   778 px image box × ~0.925 alpha bbox ≈ 720 px ≈ 37.5% of the 1920 frame for all three */
#s-icv-kit .kit-i[data-slug="bus"],#s-icv-kit .kit-i[data-slug="offroad"],#s-icv-kit .kit-i[data-slug="ambulance"]{inset:32px 131px 28px 131px}