/* ===== tokens ===== */
:root{
  --bg:#050505; --bg-rgb:5,5,5; --card:#0f0f0f; --card-2:#121212; --card-3:#1a1a1a;
  --line:#222; --line2:#2c2c2c; --line-soft:rgba(255,255,255,.12); --line-mid:rgba(255,255,255,.35);
  --fg:#fff; --fg-2:#ddd; --fg-3:#ccc; --fg-4:#c9c9c9; --muted:#b3b3b3; --muted-2:#a6a6a6; --muted2:#666; --muted-3:#555;
  --led:oklch(0.83 0.19 142); --led-glow:oklch(0.83 0.19 142 / .45); --led-dim:oklch(0.83 0.19 142 / .18);
  --led-off:oklch(0.35 0.03 142);
  --bg-2:#111814; --card-alt:#161e1a; --line-alt:#26302a; --line2-alt:#31403a;
  --on-led:#0f0f0f; --scrim:rgba(5,5,5,.85); --shadow:rgba(0,0,0,.6);
  --r:0.875rem; --r-s:12px;
  --ease-out:cubic-bezier(.16,1,.3,1); --ease-in-out:cubic-bezier(.65,0,.35,1);
  --dur-s:160ms; --dur-m:420ms; --dur-l:700ms;
  --display:'Archivo','Noto Sans JP',sans-serif;
  --sans:'Manrope','Noto Sans JP',sans-serif;
  --jp:'Noto Sans JP',sans-serif;
  --mono:'JetBrains Mono',monospace;
  --content:1100px;
}

/* ===== base ===== */
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--fg);font-family:var(--jp);-webkit-font-smoothing:antialiased;overflow-x:clip}
img,video,svg{max-width:100%}
a{color:inherit;text-decoration:none}
.section{max-width:calc(var(--content) + 96px);margin:0 auto;padding:80px 48px}
.sec-h{font-family:var(--jp);font-weight:900;font-size:36px;letter-spacing:-.02em;line-height:1.25;margin:0 0 14px;overflow-wrap:anywhere}
.sec-lead{color:var(--muted);font-size:20px;line-height:1.8;margin:0 0 40px;max-width:720px}
.k{font-family:var(--mono);font-size:13px;font-weight:600;color:var(--led);letter-spacing:.18em;text-transform:uppercase}
.btn{display:inline-block;border-radius:999px;padding:14px 26px;font-size:16px;font-weight:600;font-family:var(--sans);white-space:nowrap;transition:transform var(--dur-s) var(--ease-out),background-color var(--dur-s) var(--ease-out)}
.btn.pri{background:var(--led);color:var(--on-led);box-shadow:0 0 22px var(--led-glow)}
.btn.pri:hover{transform:translateY(-1px)}
.btn:focus-visible{outline:2px solid var(--fg);outline-offset:3px}
.ph{border-radius:var(--r-s);border:1px solid var(--line2);background:linear-gradient(160deg,var(--card-2),var(--bg));display:grid;place-items:center;color:var(--muted2);font-family:var(--mono);font-size:11px;letter-spacing:.1em;margin:0;overflow:hidden}
.ph img{width:100%;height:100%;object-fit:cover;display:block}
.ph.phone{aspect-ratio:9/16;width:220px;margin:0 auto;border-radius:28px;border-width:6px;border-color:var(--card-3)}
.ph.wide{aspect-ratio:16/10}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.detail{background:var(--bg-2);--card:var(--card-alt);--line:var(--line-alt);--line2:var(--line2-alt)}
.detail>.section:first-child{padding-top:96px}
.detail .ph{background:linear-gradient(160deg,var(--card),var(--bg-2))}
.foot-band{background:var(--bg-2)}

/* ===== nav ===== */
.nav{position:fixed;top:0;left:0;right:0;z-index:20;display:flex;align-items:center;justify-content:space-between;padding:20px max(48px, calc((100% - var(--content)) / 2));height:84px;background:linear-gradient(180deg,rgba(var(--bg-rgb),.7),transparent);border-bottom:1px solid transparent;transition:background-color var(--dur-s) var(--ease-out),border-color var(--dur-s) var(--ease-out)}
.nav.scrolled{background:rgba(var(--bg-rgb),.78);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-bottom-color:var(--line)}
[id]{scroll-margin-top:96px}
html{scroll-behavior:smooth}
.nav .brand{display:flex;align-items:center;gap:8px}
.nav .brand .ic{width:36px;height:36px;border-radius:8px;display:block;box-shadow:0 0 18px var(--led-glow)}
.nav .brand .wm{height:44px;display:block}
.nav .links{display:flex;align-items:center;gap:30px;font-size:14px;color:var(--fg-3);line-height:1;font-weight:500;white-space:nowrap}
.nav .links a{position:relative;padding:6px 0}
.nav .links a::after{content:"";position:absolute;left:0;right:100%;bottom:0;height:1px;background:var(--led);transition:right var(--dur-s) var(--ease-out)}
.nav .links a:hover::after,.nav .links a[aria-current="page"]::after{right:0}
.nav .links a:focus-visible{outline:2px solid var(--fg);outline-offset:4px}

/* ===== hero ===== */
.hero{position:relative;overflow:visible;padding:84px 44px 0;min-height:600px;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center}
.hero .bg{position:absolute;inset:0;z-index:0;overflow:hidden}
.hero .bg video,.hero .bg img{width:100%;height:100%;object-fit:cover;display:block;filter:saturate(.8)}
.hero .bg img{display:none}
.hero .bg::after{content:"";position:absolute;inset:0;
  background:
    radial-gradient(ellipse 60% 55% at 50% 48%, rgba(var(--bg-rgb),.72) 0%, rgba(var(--bg-rgb),.55) 45%, rgba(var(--bg-rgb),.2) 100%),
    linear-gradient(180deg, rgba(var(--bg-rgb),.85) 0%, rgba(var(--bg-rgb),.35) 30%, rgba(var(--bg-rgb),.35) 70%, var(--bg) 100%)}
.hero>*:not(.bg){position:relative;z-index:1}
.hero h1{font-family:var(--jp);font-weight:900;font-size:46px;line-height:1.25;letter-spacing:-.02em;margin:18px auto 14px;max-width:760px;text-shadow:0 2px 24px var(--shadow);overflow-wrap:anywhere;word-break:keep-all}
.hero h1 em{font-style:normal;color:var(--led)}
.hero .lead{color:var(--fg-4);font-size:18px;line-height:1.9;max-width:640px;margin:0 auto 26px;text-shadow:0 1px 12px var(--shadow)}
.hero .cta{display:flex;flex-direction:column;align-items:center;gap:14px;margin:0}
.hero .sub{font-size:15px;color:var(--fg-3);text-decoration:underline;text-underline-offset:4px;text-decoration-color:var(--line-mid)}
.hero .sub:hover{color:var(--fg)}
.hero .sub:focus-visible{outline:2px solid var(--fg);outline-offset:3px}

.kicker{display:inline-flex;align-items:center;gap:14px;font-family:var(--mono);font-size:12px;letter-spacing:.2em;color:var(--muted-2);text-transform:uppercase}
.kicker i{width:28px;height:1px;background:var(--line-mid);display:block}
.kicker .w{color:var(--muted-2);animation:wordglow 4.4s var(--ease-in-out) infinite}
.kicker .grp{display:inline-flex;align-items:center;gap:5px}
.kicker .grp .w{animation-delay:0s}
.kicker .arrow{animation-delay:1.1s;margin:0 4px;letter-spacing:0;font-size:13px}
.kicker .arrow+.w{animation-delay:2.2s}
.kicker .sep{color:var(--muted-3)}
@keyframes wordglow{
  0%,8%{color:var(--muted-2);text-shadow:none}
  16%,28%{color:var(--led);text-shadow:0 0 10px var(--led-glow),0 0 22px var(--led-glow)}
  40%,100%{color:var(--muted-2);text-shadow:none}
}

/* ===== demo ===== */
.demo{padding-top:64px;padding-bottom:40px}
.demo-pair{display:grid;grid-template-columns:minmax(0,1.22fr) minmax(0,1fr);gap:28px;align-items:start}
.demo-item{display:grid;gap:10px;align-content:start}
.ph.demo-phone{aspect-ratio:2736/1260;width:100%;border-radius:28px;border-width:6px;border-color:var(--card-3)}
.ph.demo-web{aspect-ratio:16/9;width:100%}
.ph.demo-web video{width:100%;height:100%;object-fit:cover;display:block}
.ph.still{aspect-ratio:auto}
.ph.still img{height:auto}
.demo-cap{margin:0;font-family:var(--mono);font-size:12px;color:var(--muted-2);letter-spacing:.08em}
@media (max-width:768px){
  .demo-pair{grid-template-columns:minmax(0,1fr)}
}

/* ===== flow ===== */
.flow{position:relative;padding:0 max(44px, calc((100% - var(--content)) / 2)) 96px;z-index:1}
.flow-head{padding:40px 0 8px;position:relative;z-index:2}
.flow .section{padding:40px 0 8px}
.flow-body{position:relative}
.spine{position:absolute;left:50%;top:0;bottom:0;width:2px;transform:translateX(-50%);background:repeating-linear-gradient(180deg,var(--line2) 0 5px,transparent 5px 11px)}
.step{position:relative;display:grid;grid-template-columns:minmax(0,1fr) 120px minmax(0,1fr);align-items:center;min-height:380px;opacity:.28;transform:translateY(18px);transition:opacity var(--dur-l) var(--ease-out),transform var(--dur-l) var(--ease-out)}
.ph.ill{aspect-ratio:16/9}
.ph.ill img{width:100%;height:100%;object-fit:cover;display:block}
.step.on{opacity:1;transform:none}
.step .node{grid-column:2;justify-self:center;width:52px;height:52px;border-radius:50%;background:var(--bg);border:1px solid var(--line2);display:grid;place-items:center;font-family:var(--mono);font-size:12px;color:var(--muted);position:relative;z-index:2;transition:border-color var(--dur-m) var(--ease-out),color var(--dur-m) var(--ease-out),box-shadow var(--dur-m) var(--ease-out)}
.step.on .node{box-shadow:0 0 0 6px var(--bg)}
.step.past .node{border-color:var(--fg);color:var(--fg)}
.step.on.cur .node{border-color:var(--led);color:var(--led);box-shadow:0 0 0 6px var(--bg),0 0 0 7px var(--led-dim),0 0 30px var(--led-glow)}
.step .text{grid-column:1;padding-right:24px;text-align:left}
.step .shot{grid-column:3;padding-left:24px}
.step.alt .text{grid-column:3;grid-row:1;padding:0 0 0 24px}
.step.alt .shot{grid-column:1;grid-row:1;padding:0 24px 0 0}
.step .k{transition:color var(--dur-m) var(--ease-out)}
.step.on:not(.cur) .k{color:var(--fg-3)}
.step h3{font-family:var(--jp);font-size:30px;margin:8px 0 12px;font-weight:900;letter-spacing:-.015em;overflow-wrap:anywhere}
.step p{color:var(--muted);font-size:18px;line-height:1.8;margin:0 0 14px}
.step ul{margin:0;padding:0;list-style:none;display:grid;gap:8px}
.step li{font-size:17px;color:var(--fg-2);display:flex;gap:12px;align-items:center}
.step li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--led);box-shadow:0 0 8px var(--led-glow);flex:none}
.step .ph{transform:translateY(14px);opacity:0;transition:opacity var(--dur-l) var(--ease-out) 150ms,transform var(--dur-l) var(--ease-out) 150ms}
.step.on .ph{transform:none;opacity:1}

/* ===== scenes ===== */
.scene-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.scene{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:0 0 24px;overflow:hidden}
.scene-img{display:block;width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;margin:0 0 18px;border-bottom:1px solid var(--line)}
.scene h3{font-family:var(--jp);font-weight:900;font-size:22px;margin:0 0 10px;letter-spacing:-.01em;padding:0 28px}
.scene p{color:var(--muted);font-size:17px;line-height:1.8;margin:0;padding:0 28px}

/* ===== terms ===== */
.terms-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px}
.terms-col h3{font-family:var(--jp);font-weight:900;font-size:20px;margin:0 0 6px;letter-spacing:-.01em}
.led-list{list-style:none;margin:0;padding:0}
.led{display:flex;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid var(--line);font-size:17px;color:var(--muted);line-height:1.5}
.led .lamp{width:10px;height:10px;border-radius:50%;background:var(--led-off);flex:none;transition:background-color var(--dur-m) var(--ease-out),box-shadow var(--dur-m) var(--ease-out)}
.led .tag{flex:none;font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:var(--muted-2);border:1px solid var(--line2);border-radius:4px;padding:2px 6px}
.led.on .tag{color:var(--led);border-color:var(--led-dim)}
.led.opt .tag{color:var(--fg);border-color:var(--line-mid)}
.led.lit{color:var(--fg)}
.led.on.lit .lamp{background:var(--led);box-shadow:0 0 10px var(--led-glow)}
.led.opt.lit .lamp{background:var(--fg)}
@media (max-width:768px){
  .scene-grid,.terms-grid{grid-template-columns:minmax(0,1fr)}
}

/* ===== features ===== */
.feat{display:grid;grid-template-columns:minmax(0,340px) minmax(0,1fr);gap:40px;padding:44px 0;border-top:1px solid var(--line)}
.feat-head h3{font-family:var(--jp);font-weight:900;font-size:26px;margin:0 0 8px;letter-spacing:-.01em}
.feat-head p{color:var(--muted);font-size:18px;line-height:1.8;margin:0}
.feat-list{margin:0;padding:0;list-style:none;display:grid;gap:10px;align-content:start}
.feat-list li{font-size:17px;color:var(--fg-2);display:flex;gap:12px;align-items:center}
.feat-list li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--led);flex:none}
.feat-body{display:grid;gap:18px;align-content:start}
.feat-body .ph{aspect-ratio:16/10;width:100%}
.feat-body .ph.still{aspect-ratio:auto}
.feat-note{grid-column:2;color:var(--muted2);font-size:14px;margin:12px 0 0}
.mock{margin:0}
.mock img{display:block;width:100%;height:auto}

.num{font-family:var(--mono);color:var(--led);font-weight:600}

@media (max-width:768px){
  .feat{grid-template-columns:minmax(0,1fr);gap:20px}
  .feat-note{grid-column:1}
}

/* ===== tech ===== */
body.tech .nav{margin-bottom:0;background:none}
.tech-hero{padding-top:140px}
.tech-hero h1.sec-h{font-size:40px}
.arch{margin:36px 0 0;background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:20px;overflow-x:auto}
.arch svg{width:100%;height:auto;display:block}
.arch-box{fill:var(--card-2);stroke:var(--line2)}
.arch-ic{fill:none;stroke:var(--fg);stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.arch-k{fill:var(--led);font-size:11px;letter-spacing:.14em}
.arch-t{fill:var(--fg);font-size:18px;font-weight:700}
.arch-m{fill:var(--muted);font-size:12px}
.arch-stub{stroke:var(--line2);stroke-width:1}
.arch-lane{fill:var(--fg);font-size:12px;letter-spacing:.08em}
.arch-seg{fill:var(--muted);font-size:11px;letter-spacing:.04em}
.arch-sub{fill:var(--muted-2);font-size:10px;letter-spacing:.14em}
.arch-l1{stroke:var(--led);stroke-width:2.5;fill:none}
.arch-l2{stroke:var(--fg);stroke-width:2;fill:none;stroke-dasharray:1 7;stroke-linecap:round}
.arch-l3{stroke:var(--led);stroke-width:1.5;fill:none;stroke-dasharray:8 6;opacity:.7}
.arch-n1{fill:var(--bg);stroke:var(--led);stroke-width:2}
.arch-n2{fill:var(--bg);stroke:var(--fg);stroke-width:2}
.arch-n3{fill:var(--bg);stroke:var(--led);stroke-width:1.5}
.arch-d1{fill:var(--led)} .arch-d2{fill:var(--fg)}
.arch-ar-g{fill:var(--led)} .arch-ar-w{fill:var(--fg)}
.section.tech-sec{padding-top:48px;padding-bottom:16px}
.tech-sec .sec-h{font-size:24px}
.feat-list.cols{grid-template-columns:repeat(2,minmax(0,1fr))}
.fold{margin:14px 0 0;border:1px solid var(--line);border-radius:var(--r-s);background:var(--card)}
.fold summary{cursor:pointer;padding:12px 16px;font-size:16px;color:var(--fg-2);list-style:none}
.fold summary::-webkit-details-marker{display:none}
.fold summary::before{content:"＋";display:inline-block;width:1.4em;color:var(--led)}
.fold[open] summary::before{content:"－"}
.fold summary:focus-visible{outline:2px solid var(--fg);outline-offset:2px}
.fold .feat-list{padding:0 16px 14px}
@media (max-width:768px){
  .section.tech-hero{padding-top:104px}
  .tech-hero h1.sec-h{font-size:32px}
  .feat-list.cols{grid-template-columns:minmax(0,1fr)}
  .arch svg{min-width:720px}
}

/* ===== footer ===== */
.foot{max-width:calc(var(--content) + 96px);margin:0 auto;padding:24px 48px 40px;border-top:1px solid var(--line);display:flex;justify-content:space-between;font-family:var(--mono);font-size:11px;color:var(--muted2)}

/* ===== mobile ===== */
@media (max-width:768px){
  .section{padding:56px 20px}
  .sec-h{font-size:32px}
  .sec-lead{font-size:18px}
  .step h3{font-size:26px}
  .step p,.feat-head p{font-size:16px}
  .step li,.feat-list li,.led,.scene p{font-size:16px}
  .feat-head h3{font-size:22px}
  .scene h3{font-size:18px}
  .terms-col h3{font-size:18px}
  .nav{padding:16px 20px;gap:20px;height:72px;margin-bottom:-72px}
  .nav .links{gap:18px;font-size:13px}
  .hero{padding:72px 20px 0;min-height:0}
  .hero{padding-left:24px;padding-right:24px}
  .hero h1{font-size:30px}
  .flow{padding:0 20px 64px}
  .spine{left:0;top:0}
  .step,.step.alt{grid-template-columns:minmax(0,1fr);min-height:0;padding:28px 0 28px 36px;align-items:start}
  .step .node,.step .text,.step .shot,.step.alt .text,.step.alt .shot{grid-column:1;grid-row:auto;padding:0;margin:0}
  .step .node{position:absolute;grid-column:auto;grid-row:auto;margin:0;left:-20px;top:28px;justify-self:start;width:40px;height:40px;font-size:11px}
  .step .shot{margin-top:18px}
  .ph.phone{width:160px}
  .foot{padding:20px 20px 32px}
  .detail>.section:first-child{padding-top:64px}
}

@media (max-width:600px){
  .nav{padding:14px 16px;gap:14px;height:64px}
  [id]{scroll-margin-top:72px}
  .nav .brand .wm{display:none}
  .nav .links{gap:14px;font-size:13px}
  .hero{padding-top:64px}
}

/* ===== reduced motion ===== */
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
  .step,.step .ph{opacity:1;transform:none}
  .hero .bg video{display:none}
  .arch-flow{display:none}
  .hero .bg img{display:block}
}