/* ---------- utilities ---------- */
.wrap{width:min(1240px,100%);margin:0 auto;padding:0 var(--gutter)}
.wrap.narrow{width:min(860px,100%)}
.paper{background:var(--paper);color:var(--ink)}
.eyebrow{font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--mute);margin:0 0 20px}
.eyebrow span{letter-spacing:.06em;text-transform:none}
.eyebrow.ink{color:var(--mute-ink)}
.pc{display:none}
@media (min-width:900px){.pc{display:inline}}
[data-c="ai"]{--c:var(--blue)}
[data-c="human"]{--c:var(--orange)}
[data-c="both"]{--c:var(--purple)}
i[data-c]{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--c);vertical-align:middle;margin:0 6px 0 0}

.pill{display:inline-flex;align-items:center;justify-content:center;gap:.5em;height:52px;padding:0 28px;border-radius:999px;
  font-weight:700;text-decoration:none;letter-spacing:.06em;transition:transform .5s var(--ease),background .3s,color .3s,border-color .3s}
.pill--solid{background:var(--orange);color:#fff}
.pill--solid:hover{transform:translateY(-2px);background:#ff7d3b}
.pill--ghost{border:1px solid currentColor;color:inherit}
.pill--ghost:hover{background:#EDEBE5;color:var(--ink);border-color:#EDEBE5}
:focus-visible{outline:2px solid var(--orange);outline-offset:3px}

/* split-line reveal */
.line{display:block;overflow:hidden;padding-bottom:.06em}
.line>span{display:inline-block;transform:translateY(105%);transition:transform 1.2s var(--ease)}
.is-in .line>span,.line.is-in>span{transform:none}
.is-in .line:nth-child(2)>span,.line.is-in:nth-child(2)>span{transition-delay:.12s}
.reveal{opacity:0;transform:translateY(32px);transition:opacity 1s var(--ease),transform 1.2s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
.no-js .reveal,.no-js .line>span{opacity:1;transform:none}

/* ---------- HUD ---------- */
.hud{position:fixed;inset:0 0 auto 0;z-index:80;display:flex;align-items:center;gap:24px;padding:18px var(--gutter);
  mix-blend-mode:difference;color:#fff;pointer-events:none}
.hud>*{pointer-events:auto}
.hud__logo{display:flex;align-items:center;gap:6px;text-decoration:none;font-weight:800;font-size:20px;letter-spacing:-.01em}
.hud__at{display:inline-grid;place-items:center;width:26px;height:26px;border-radius:50%;border:2px solid currentColor;font-family:var(--f-en);font-weight:800;font-size:14px;line-height:1}
.hud__count{margin-left:auto;display:flex;align-items:baseline;gap:6px;font-size:13px}
.hud__label{font-family:var(--f-ja);font-size:12px;opacity:.7;margin-right:4px}
.hud__num{font-size:22px;font-weight:600;min-width:3ch;text-align:right;font-variant-numeric:tabular-nums}
.hud__sep,.hud__total{opacity:.5}
.hud__cta{height:40px;padding:0 20px;font-size:13px}
@media (max-width:640px){.hud__cta{display:none}.hud{padding:14px 16px}.hud__num{font-size:18px}}

.rail{transition:opacity .5s;position:fixed;right:calc(var(--gutter) - 8px);top:50%;transform:translateY(-50%);z-index:70;mix-blend-mode:difference;color:#fff}
.rail ol{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px}
.rail a{display:flex;align-items:center;justify-content:flex-end;gap:10px;text-decoration:none;font-family:var(--f-mono);font-size:11px;height:18px;opacity:.4;transition:opacity .3s}
.rail a span{font-family:var(--f-ja);font-size:12px;opacity:0;transform:translateX(6px);transition:.4s var(--ease)}
.rail a::after{content:"";width:14px;height:1px;background:currentColor;transition:width .4s var(--ease)}
.rail a:hover{opacity:1}.rail a:hover span{opacity:1;transform:none}
.rail a.is-active{opacity:1}.rail a.is-active::after{width:30px}
.rail a.is-active span{opacity:1;transform:none}
@media (max-width:1180px){.rail{display:none}}

/* ---------- HERO ---------- */
.hero{position:relative;height:240vh}
.hero__sticky{position:sticky;top:0;height:100vh;height:100svh;display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:clamp(24px,4vw,72px);
  align-items:center;padding:96px var(--gutter) 56px;overflow:hidden}
.hero__title{font-weight:900;font-size:clamp(40px,4.7vw,88px);white-space:nowrap;line-height:1.12;letter-spacing:-.02em;margin:0 0 28px}
.hero__title em{font-style:normal;color:transparent;-webkit-text-stroke:1.5px #EDEBE5;position:relative}
.hero__title em::after{content:"表面";position:absolute;left:0;top:0;color:var(--orange);-webkit-text-stroke:0;clip-path:inset(0 calc(100% - var(--hp,0) * 100%) 0 0)}
.hero__lead{color:#B9B6AE;font-size:clamp(14px,1.15vw,17px);margin:0;max-width:30em}
.hint-sp{display:none}
@media (hover:none){.hint-pc{display:none}.hint-sp{display:inline}}
.hero__scroll{position:absolute;left:var(--gutter);bottom:24px;font-size:11px;letter-spacing:.2em;color:var(--mute);display:flex;align-items:center;gap:12px}
.hero__scroll span{width:48px;height:1px;background:var(--mute);position:relative;overflow:hidden}
.hero__scroll span::after{content:"";position:absolute;inset:0;background:#fff;transform:translateX(-100%);animation:scrollhint 2s var(--ease-io) infinite}
@keyframes scrollhint{to{transform:translateX(100%)}}

/* X-ray browser */
.xray{position:relative}
.browser{border-radius:14px;overflow:hidden;background:#1a1a1a;box-shadow:0 60px 120px -40px rgba(0,0,0,.8),0 0 0 1px rgba(255,255,255,.08);
  transform:perspective(1600px) rotateY(calc(-8deg + var(--hp,0)*8deg)) rotateX(calc(4deg - var(--hp,0)*4deg))}
.browser__bar{height:34px;display:flex;align-items:center;gap:7px;padding:0 14px;background:#202020;border-bottom:1px solid #2b2b2b}
.browser__bar i{width:10px;height:10px;border-radius:50%;background:#3a3a3a}
.browser__url{margin-left:14px;font-size:11px;color:#8a8a8a;background:#151515;border-radius:6px;padding:3px 12px}
.browser__view{position:relative;aspect-ratio:16/10.4;overflow:hidden;cursor:none}
@media (hover:none){.browser__view{cursor:auto}}
.site{position:absolute;inset:0;padding:3.2% 4%;display:flex;flex-direction:column;gap:4%;font-size:clamp(8px,.95vw,14px)}
.site--front{background:#F6EFE3;color:#3A2618;z-index:2;
  clip-path:inset(calc(var(--scan,0)*100%) 0 0 0);
  -webkit-mask-image:radial-gradient(circle var(--lr,0px) at var(--lx,50%) var(--ly,50%),transparent 98%,#000 100%);
          mask-image:radial-gradient(circle var(--lr,0px) at var(--lx,50%) var(--ly,50%),transparent 98%,#000 100%)}
.site--back{background:#07122B;color:#9DB8FF;z-index:1;
  background-image:linear-gradient(rgba(43,108,255,.13) 1px,transparent 1px),linear-gradient(90deg,rgba(43,108,255,.13) 1px,transparent 1px);background-size:22px 22px}
.site__nav{display:flex;align-items:center;gap:5%;font-size:.95em}
.site__nav b{font-size:1.25em;margin-right:auto;letter-spacing:.06em}
.site__btn{background:#7A3E1D;color:#fff;border-radius:99px;padding:.45em 1.1em;font-weight:700;font-size:.9em;white-space:nowrap}
.site__btn--lg{display:inline-block;margin-top:1em;padding:.7em 1.6em}
.site__hero{flex:1;display:grid;grid-template-columns:1.2fr 1fr;align-items:center;gap:4%;border-radius:10px;padding:4% 5%;
  background:radial-gradient(120% 120% at 80% 30%,#E9C894 0%,#D9A766 40%,#8E5629 100%);color:#2B170B}
.site__heroText small{display:block;font-size:.85em;opacity:.8;margin-bottom:.4em}
.site__heroText strong{display:block;font-size:2.7em;line-height:1.2;font-weight:900;letter-spacing:.02em}
.site__barrel{width:78%;justify-self:center;filter:drop-shadow(0 18px 18px rgba(60,30,10,.35))}
.site__cards{display:grid;grid-template-columns:repeat(3,1fr);gap:3%;height:24%}
.site__cards div{background:#fff;border-radius:8px;padding:5% 6%;display:flex;flex-direction:column;justify-content:flex-end;gap:.2em;position:relative;overflow:hidden}
.site__cards i{position:absolute;inset:0 0 50% 0;background:#E6D2B5}
.site__cards i.c2{background:#D7B98E}.site__cards i.c3{background:#C9A06C}
.site__cards b{font-size:1em;position:relative}.site__cards span{font-size:.8em;opacity:.65;position:relative}
.bp{border:1px dashed rgba(122,160,255,.55)!important;background:rgba(43,108,255,.06)!important;color:#9DB8FF!important;box-shadow:none!important;filter:none!important;border-radius:6px}
.site--back .site__hero{background:none}
.site--back .site__heroText strong{color:#C9D8FF;border:0!important;background:none!important}
.site--back .site__heroText small{border:0!important;background:none!important}
.bp--img{display:grid;place-items:center;text-align:center;aspect-ratio:1;font-family:var(--f-mono);font-size:.85em;border-radius:8px;width:78%;line-height:1.6}
.site--back .site__cards{border:0!important;background:none!important}
.site--back .site__cards div{justify-content:center;align-items:center}
.code{height:24%;flex:none;border:1px dashed rgba(122,160,255,.4);border-radius:8px;padding:2% 3%;font-size:.74em;line-height:1.7;color:#7F9DEB;white-space:nowrap;overflow:hidden;margin:0;display:flex;flex-direction:column;justify-content:center}
.code span{display:block;overflow:hidden;text-overflow:ellipsis}
.tags{position:absolute;inset:0;list-style:none;margin:0;padding:0;z-index:4;pointer-events:none}
.tags li{position:absolute;left:var(--x);top:var(--y);font-size:clamp(9px,.85vw,12px);background:rgba(7,18,43,.92);color:#fff;border:1px solid var(--c);
  border-radius:99px;padding:4px 10px 4px 8px;display:flex;align-items:center;gap:6px;white-space:nowrap;
  opacity:0;transform:translateY(6px) scale(.96);transition:opacity .35s var(--ease),transform .5s var(--ease)}
.tags li::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--c);box-shadow:0 0 10px var(--c)}
.tags li.is-on{opacity:1;transform:none}
.scanline{position:absolute;left:0;right:0;top:calc(var(--scan,0)*100%);height:0;z-index:5;pointer-events:none;opacity:var(--scanop,1)}
.scanline::before{content:"";position:absolute;left:0;right:0;top:-1px;height:2px;background:#7FB0FF;box-shadow:0 0 18px 4px rgba(43,108,255,.8)}
.scanline::after{content:"";position:absolute;left:0;right:0;bottom:0;height:90px;background:linear-gradient(to top,rgba(43,108,255,.25),transparent)}
.scanline span{position:absolute;right:10px;top:6px;font-size:10px;letter-spacing:.2em;color:#9DB8FF}
.lens{position:absolute;z-index:6;left:var(--lx,50%);top:var(--ly,50%);width:calc(var(--lr,0px)*2);height:calc(var(--lr,0px)*2);margin:calc(var(--lr,0px)*-1) 0 0 calc(var(--lr,0px)*-1);
  border-radius:50%;border:1.5px solid rgba(157,184,255,.9);box-shadow:0 0 0 1px rgba(0,0,0,.2),0 0 40px rgba(43,108,255,.45),inset 0 0 30px rgba(43,108,255,.25);pointer-events:none;opacity:var(--lo,0);transition:opacity .3s}
.lens::after{content:"X-RAY";position:absolute;left:50%;top:calc(100% + 8px);transform:translateX(-50%);font:600 9px/1 var(--f-mono);letter-spacing:.2em;color:#9DB8FF}
.xray__legend{margin:16px 0 0;font-size:11px;color:var(--mute);display:flex;gap:18px;flex-wrap:wrap}

@media (max-width:899px){
  .hero{height:240vh}
  .hero__sticky{grid-template-columns:1fr;align-content:center;gap:24px;padding-top:76px;padding-bottom:64px}
  .hero__title{font-size:clamp(38px,11vw,64px);margin-bottom:14px}
  .hero__lead{font-size:14px}
  .browser{transform:none}
  .tags li{padding:2px 7px 2px 6px;gap:4px;font-size:8.5px}
  .xray__legend{gap:12px;margin-top:10px}
}

/* ---------- PROLOGUE ---------- */
.prologue{padding:clamp(120px,18vh,220px) 0}
.quote{font-size:clamp(22px,3.2vw,44px);font-weight:700;line-height:1.6;margin:0 0 64px;letter-spacing:.01em}
.prose p{margin:0 0 1.4em;font-size:clamp(15px,1.15vw,17.5px);line-height:2.05}
.prose p:last-child{margin-bottom:0}
.paper .prose p{color:#34312B}
.story-open{margin-top:96px;padding-top:48px;border-top:1px solid var(--line-ink)}
.story-open__title{font-size:clamp(20px,2.2vw,30px);font-weight:700;line-height:1.7;margin:0 0 16px}
.note{font-size:13px;color:var(--mute-ink);margin:0}

/* ---------- CHAPTER ---------- */
.chapter{position:relative;display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:clamp(24px,5vw,96px);
  padding:clamp(120px,16vh,200px) var(--gutter);max-width:1440px;margin:0 auto;border-top:1px solid var(--line)}
.chapter.paper,.chapter--night{max-width:none;padding-left:max(var(--gutter),calc((100vw - 1440px)/2 + var(--gutter)));padding-right:max(var(--gutter),calc((100vw - 1440px)/2 + var(--gutter)))}
.chapter__head{position:sticky;top:110px;align-self:start;display:grid;grid-template-columns:auto 1fr;column-gap:20px}
.chapter__no{grid-column:1/3;margin:0;font-weight:900;font-size:clamp(96px,13vw,200px);line-height:.82;letter-spacing:-.06em;
  color:transparent;-webkit-text-stroke:1.2px rgba(237,235,229,.35);position:relative}
.chapter__no::after{content:attr(data-n);position:absolute;inset:0;color:var(--orange);-webkit-text-stroke:0;clip-path:inset(calc(100% - var(--cp,0)*100%) 0 0 0)}
.paper .chapter__no{-webkit-text-stroke-color:rgba(11,11,11,.3)}
.chapter__title{grid-column:1/3;margin:28px 0 0;font-size:clamp(36px,3.6vw,56px);font-weight:900;line-height:1}
.chapter__title .v{letter-spacing:.12em;display:inline-block}
.chapter__catch{grid-column:1/3;margin:20px 0 0;font-size:clamp(18px,1.7vw,24px);font-weight:700;line-height:1.6;color:#CFCBC2}
.paper .chapter__catch{color:#3a362f}
.chapter__body{min-width:0;display:flex;flex-direction:column;gap:56px}
.chapter__body .prose{max-width:36em}
.chapter__body .prose p{color:#C9C5BC}
.chapter.paper .chapter__body .prose p{color:#34312B}
@media (max-width:899px){
  .chapter{grid-template-columns:1fr;gap:40px;padding-top:100px;padding-bottom:100px}
  .chapter__head{position:relative;top:auto;grid-template-columns:auto 1fr;align-items:end}
  .chapter__no{grid-column:1/2;grid-row:1/3;font-size:92px}
  .chapter__title{margin:0;grid-column:2;font-size:30px}.chapter__title .v{writing-mode:horizontal-tb;letter-spacing:.08em}
  .chapter__catch{grid-column:2;margin:8px 0 0;font-size:16px}
  .chapter__catch br{display:none}
  .chapter__body{gap:40px}
}

/* who split */
.split{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.who{border:1px solid var(--line);border-radius:16px;padding:22px 24px;font-size:15px;line-height:1.8;color:#C9C5BC;position:relative;overflow:hidden}
.who::before{content:"";position:absolute;inset:0 auto 0 0;width:3px;background:var(--c)}
.who .mono{margin:0 0 8px;font-size:12px;color:var(--c);letter-spacing:.2em;font-weight:600}
@media (max-width:640px){.split{grid-template-columns:1fr}}

/* steps */
.steps{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:8px}
.steps li{font-size:13px;line-height:1;padding:10px 14px 10px 12px;border-radius:99px;border:1px solid var(--line);display:flex;align-items:center;gap:8px;color:#8f8c85;
  transition:color .5s,border-color .5s,background .5s}
.steps li::before{content:"";width:7px;height:7px;border-radius:50%;background:#444;transition:background .4s,box-shadow .4s}
.steps li.is-on{color:#EDEBE5;border-color:color-mix(in srgb,var(--c) 55%,transparent);background:color-mix(in srgb,var(--c) 10%,transparent);animation:pop .6s var(--ease)}
.steps li.is-on::before{background:var(--c);box-shadow:0 0 10px var(--c)}
.paper .steps li{border-color:var(--line-ink);color:#8d887d}
.paper .steps li.is-on{color:var(--ink)}
@keyframes pop{0%{transform:scale(.92)}60%{transform:scale(1.04)}100%{transform:none}}

.demo{position:relative;border-radius:20px;background:var(--ink-2);border:1px solid var(--line);padding:clamp(20px,3vw,40px);overflow:hidden}
.paper .demo{background:#fff;border-color:var(--line-ink)}
.demo__cap{font-size:11px;color:var(--mute);margin:16px 0 0}

/* CH01 layers */
.demo--layers{height:clamp(340px,40vw,440px);display:grid;place-items:center}
.layer{position:absolute;width:min(86%,560px);padding:24px 28px;border-radius:16px;background:#262626;border:1px solid #333;font-size:clamp(15px,1.4vw,20px);font-weight:700;line-height:1.6;
  transform:translateY(var(--ty,0px)) scale(var(--sc,1));opacity:var(--op,1);
  box-shadow:0 30px 60px -30px rgba(0,0,0,.8);will-change:transform}
.layer .mono{display:block;font-size:11px;letter-spacing:.2em;color:var(--mute);font-weight:600;margin-bottom:6px}
.layer:nth-child(1){z-index:4}.layer:nth-child(2){z-index:3;background:#2b2b2b}.layer:nth-child(3){z-index:2;background:#303030}
.layer--core{z-index:1;background:var(--orange);border-color:var(--orange);color:#fff}
.layer--core .mono{color:rgba(255,255,255,.75)}

/* CH02 search */
.search__box{display:flex;align-items:center;gap:12px;height:56px;border-radius:99px;background:#fff;color:var(--ink);padding:0 22px;font-size:17px;font-weight:500;max-width:520px}
.search__icon{width:16px;height:16px;border:2px solid #888;border-radius:50%;position:relative;flex:none}
.search__icon::after{content:"";position:absolute;width:7px;height:2px;background:#888;right:-6px;bottom:-3px;transform:rotate(45deg)}
.caret{width:2px;height:22px;background:var(--blue);animation:blink 1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}
.search__bars{list-style:none;margin:32px 0 0;padding:0;display:grid;gap:12px}
.search__bars li{display:grid;grid-template-columns:9.5em 1fr;align-items:center;gap:16px;font-size:14px;color:#C9C5BC}
.search__bars i{display:block;height:10px;border-radius:99px;background:linear-gradient(90deg,var(--blue),#6E9BFF);transform-origin:left;transform:scaleX(0);transition:transform 1.4s var(--ease)}
.search__bars li:last-child{color:#777}
.search__bars li:last-child i{background:#555}
.is-in .search__bars i{transform:scaleX(var(--v))}
.search__bars li:nth-child(2) i{transition-delay:.1s}.search__bars li:nth-child(3) i{transition-delay:.2s}.search__bars li:nth-child(4) i{transition-delay:.3s}.search__bars li:nth-child(5) i{transition-delay:.4s}
.counter{border-left:2px solid var(--purple);padding:4px 0 4px 24px}
.counter ol{margin:0;padding:0;list-style:none;counter-reset:c;display:grid;gap:16px}
.counter li{counter-increment:c;color:#B9B6AE;font-size:15px;display:grid;grid-template-columns:2.4em 1fr;row-gap:2px}
.counter li::before{content:counter(c,decimal-leading-zero);font-family:var(--f-mono);color:var(--purple);grid-row:1/3}
.counter b{color:#EDEBE5;font-size:16px}

/* CH03 map */
.demo--map svg{width:100%;height:auto;overflow:visible}
.map__old path,.map__new path{fill:none;stroke-linecap:round;stroke-linejoin:round}
.map__old path{stroke:#5a5a5a;stroke-width:3;stroke-dasharray:1200;stroke-dashoffset:calc(1200 - var(--m1,0)*1200);opacity:calc(1 - var(--m2,0)*.75)}
.map__new path{stroke:var(--green);stroke-width:4;stroke-dasharray:700;stroke-dashoffset:calc(700 - var(--m2,0)*700);filter:drop-shadow(0 0 8px rgba(31,178,107,.6))}
.map__nodes circle{fill:#1f1f1f;stroke:#555;stroke-width:1.5}
.map__nodes text{fill:#C9C5BC;font-size:12px;text-anchor:middle;font-family:var(--f-ja);font-weight:700}
.map__hub circle{stroke:var(--green)}
.map__goal circle{fill:var(--orange);stroke:var(--orange)}
.map__goal text{fill:#fff;font-size:14px}
.map__count{display:flex;gap:16px;align-items:center;justify-content:center;margin:12px 0 0;font-size:clamp(14px,1.6vw,20px);font-weight:600}
.map__from{color:#777;text-decoration:line-through;text-decoration-thickness:2px;text-decoration-color:rgba(255,106,31,var(--m2,0))}
.map__arrow{color:#555}.map__to{color:var(--green);opacity:calc(.2 + var(--m2,0)*.8)}

/* CH04 rewrite */
.demo--rewrite{display:grid;gap:20px;background:var(--paper);color:var(--ink);border:0}
.rw{border-radius:14px;padding:22px 26px;background:#fff;box-shadow:0 1px 0 rgba(0,0,0,.05)}
.rw__who{font-size:11px;letter-spacing:.16em;color:var(--mute-ink);margin:0 0 10px}
.rw__text{margin:0;font-size:clamp(17px,1.8vw,24px);font-weight:700;line-height:1.75;min-height:3.5em;position:relative}
.rw--ai .rw__text{color:#6c6a65}
.rw--ai .rw__text.is-struck{background:linear-gradient(var(--orange),var(--orange)) no-repeat 0 55%/100% 2px}
.rw--ai .rw__text{background:linear-gradient(var(--orange),var(--orange)) no-repeat 0 55%/0% 2px;transition:background-size 1s var(--ease)}
.rw--ai .rw__text.is-struck{background-size:100% 2px;color:#a5a29b}
.rw--human{outline:2px solid var(--orange);outline-offset:-2px}
.rw__text .cur{display:inline-block;width:2px;height:1.1em;background:currentColor;vertical-align:-.15em;margin-left:2px;animation:blink 1s steps(1) infinite}

/* CH05 device */
.demo--device{display:grid;grid-template-columns:1fr 220px;gap:32px;align-items:center;min-height:400px}
.device{justify-self:center;width:var(--dw,100%);height:var(--dh,300px);border-radius:var(--dr,10px);border:8px solid #2f2f2f;background:#111;overflow:hidden}
.device__screen{width:100%;height:100%;background:#F6EFE3;display:grid;gap:4cqw;padding:5cqw;grid-template-columns:repeat(var(--cols,3),1fr);align-content:start;container-type:inline-size;overflow:hidden}
.device{container-type:size}
.dv{border-radius:1.4cqw;background:#fff;color:#3b2414;font-weight:700;overflow:hidden}
.dv--nav{grid-column:1/-1;background:none;display:flex;align-items:center;gap:2cqw;font-size:max(7px,3.2cqw)}
.dv--nav b{margin-right:auto;color:#7A3E1D}
.dv--nav i{width:5cqw;height:.9cqw;border-radius:9px;background:#C9A57D}
.dv--hero{grid-column:1/-1;position:relative;aspect-ratio:3/1.25;background:none;isolation:isolate;padding:5cqw;display:flex;flex-direction:column;justify-content:center;align-items:flex-start;gap:3cqw}
.dv__h{font-size:max(9px,5.4cqw);line-height:1.25;color:#2a170b;position:relative;z-index:1}
.dv__btn{font-size:max(6px,2.4cqw);background:#7A3E1D;color:#fff;border-radius:99px;padding:1.2cqw 3cqw;position:relative;z-index:1}
.dv__barrel{position:absolute;right:6%;bottom:12%;width:24%;aspect-ratio:1/1.05;border-radius:18%/12%;
  background:repeating-linear-gradient(180deg,transparent 0 30%,#4a2a14 30% 36%),linear-gradient(90deg,#6d3d1c,#a8682f 45%,#6d3d1c);opacity:.95}
.dv--a,.dv--b,.dv--c{display:flex;flex-direction:column;font-size:max(7px,2.8cqw)}
.dv span{padding:2cqw 2.4cqw}
.dv__img{display:block;aspect-ratio:1.6;background:linear-gradient(135deg,#d9b48a,#8E5629)}
.dv--b .dv__img{background:linear-gradient(135deg,#efe0c4,#c08b4c)}
.dv--c .dv__img{background:linear-gradient(135deg,#c79a6a,#5b3518)}
/* heavy photos: blurry + loading stripe; light photos: crisp */
.dv--hero::before{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(120deg,#E9C894,#B9773F 70%,#8E5629)}
.dv__img,.dv--hero::before,.dv__barrel{filter:blur(calc(var(--w,1) * 7px)) saturate(calc(1 - var(--w,1) * .5))}
.dv__img{position:relative}
.dv__img::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,transparent,rgba(255,255,255,.55),transparent);
  transform:translateX(-100%);animation:dvload 1.1s linear infinite}
@keyframes dvload{to{transform:translateX(100%)}}
.device:not(.is-heavy) .dv__img::after{animation:none;opacity:0}
.weight p{margin:0;font-size:12px;color:var(--mute);letter-spacing:.1em}
.weight .weight__num{font-family:var(--f-en);font-weight:800;font-size:64px;color:#EDEBE5;letter-spacing:-.03em;line-height:1.1;font-variant-numeric:tabular-nums}
.weight__num small{font-size:20px;margin-left:6px;color:var(--mute)}
.weight__bar{height:8px;border-radius:99px;background:#2a2a2a;overflow:hidden;margin:12px 0}
.weight__bar i{display:block;height:100%;width:100%;background:var(--red);transform-origin:left;transform:scaleX(var(--w,1));transition:background .4s}
.weight.is-light .weight__bar i{background:var(--green)}
@media (max-width:700px){.demo--device{grid-template-columns:1fr}.weight{text-align:center}}

/* CH06 surfaces */
.demo--surfaces{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;background:none;border:0;padding:0;overflow:visible}
.surf{background:var(--ink-2);border:1px solid var(--line);border-radius:18px;padding:20px;opacity:0;transform:translateY(30px);transition:1s var(--ease)}
.is-in .surf{opacity:1;transform:none}.is-in .surf:nth-child(2){transition-delay:.15s}.is-in .surf:nth-child(3){transition-delay:.3s}
.surf__where{font-size:11px;letter-spacing:.12em;color:var(--mute);margin:0 0 14px}
.serp,.share,.ai{background:#fff;color:#202124;border-radius:12px;padding:16px;font-family:system-ui,sans-serif}
.serp p,.share p,.ai p{margin:0}
.serp__url{font-size:12px;color:#4d5156}
.serp__title{font-size:17px;color:#1a0dab;margin:4px 0!important;line-height:1.4}
.serp__desc{font-size:13px;color:#4d5156;line-height:1.6}
.share{padding:0;overflow:hidden;background:#E7F5EC}
.share__img{aspect-ratio:1.91/1;background:radial-gradient(120% 120% at 80% 30%,#E9C894,#D9A766 40%,#8E5629)}
.share__title{font-size:14px;font-weight:700;margin:10px 14px 2px!important;line-height:1.4}
.share__url{font-size:11px;color:#666;margin:0 14px 12px!important}
.ai{background:#1b1b1f;color:#eee;border:1px solid #333}
.ai__q{margin:0 0 12px!important;font-size:13px;background:#2c2c33;border-radius:12px;padding:8px 12px;display:inline-block}
.ai__a{font-size:13.5px;line-height:1.8}
.ai__a sup{color:#6E9BFF;font-weight:700}
.ai__src{margin:12px 0 0!important;font-size:11px;color:#8aa8ff;border-top:1px solid #333;padding-top:8px}
@media (max-width:1000px){.demo--surfaces{grid-template-columns:1fr}}
.pitfall{border:1px solid rgba(255,59,48,.35);background:rgba(255,59,48,.06);border-radius:16px;padding:22px 26px}
.pitfall__label{margin:0 0 6px;font-size:11px;letter-spacing:.2em;color:#FF7A70}
.pitfall p:last-child{margin:0;color:#E4DFD5;font-size:15px}

/* CH07 pipeline + checklist */
.pipeline{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(5,1fr);position:relative;font-size:12px;font-family:var(--f-ja)}
.pipeline li{position:relative;padding:28px 8px 0 0;color:#77746d;transition:color .4s;line-height:1.5}
.pipeline li i{position:absolute;top:0;left:0;width:14px;height:14px;border-radius:50%;border:2px solid #444;background:var(--ink);z-index:1;transition:.4s}
.pipeline li::before{content:"";position:absolute;top:6px;left:14px;right:0;height:2px;background:#333}
.pipeline li::after{content:"";position:absolute;top:6px;left:14px;right:0;height:2px;background:var(--green);transform-origin:left;transform:scaleX(0);transition:transform .5s var(--ease)}
.pipeline li:last-child::before,.pipeline li:last-child::after{display:none}
.pipeline li.is-on{color:#EDEBE5}.pipeline li.is-on i{border-color:var(--green);background:var(--green)}
.pipeline li.is-done::after{transform:none}
@media (max-width:640px){.pipeline{grid-template-columns:1fr;gap:14px}.pipeline li{padding:0 0 0 28px}.pipeline li::before,.pipeline li::after{display:none}}
.checklist{list-style:none;margin:0;padding:0;display:grid}
.checklist li{display:flex;align-items:center;gap:14px;padding:14px 4px;border-bottom:1px solid var(--line);font-size:15px;color:#77746d;transition:color .3s;line-height:1.5}
.checklist li::before{content:"";flex:none;width:22px;height:22px;border-radius:6px;border:1.5px solid #444;transition:.3s;background-repeat:no-repeat;background-position:center;background-size:0;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M3 8.5l3 3 7-7' fill='none' stroke='%23fff' stroke-width='2.2'/%3E%3C/svg%3E")}
.checklist li.is-ok{color:#EDEBE5}.checklist li.is-ok::before{background-color:var(--green);border-color:var(--green);background-size:14px}
.checklist li.is-ng{color:#FF7A70}.checklist li.is-ng::before{background-color:var(--red);border-color:var(--red);background-size:12px;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4 4l8 8M12 4l-8 8' fill='none' stroke='%23fff' stroke-width='2.2'/%3E%3C/svg%3E")}
.checklist li.is-ng{animation:shake .5s}
@keyframes shake{20%,60%{transform:translateX(-4px)}40%,80%{transform:translateX(4px)}}
.trap-b{display:none}.is-trap.is-fixed .trap-a{display:none}.is-trap.is-fixed .trap-b{display:inline}
.checklist__note{margin:24px 0 0;font-size:14px;color:#a9a59c;line-height:1.9}

/* CH08 gate */
.demo--gate{display:grid;grid-template-columns:1fr 200px;gap:32px;align-items:center}
.gate{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:10px;font-size:13px;font-family:var(--f-ja)}
.gate li{display:flex;align-items:center;gap:10px;padding:12px 14px;border-radius:10px;background:#1c1c1c;color:#77746d;transition:.4s;line-height:1.4}
.gate li::before{content:"";width:10px;height:10px;border-radius:50%;background:#3a3a3a;flex:none;transition:.4s}
.gate li.is-ok{color:#EDEBE5}.gate li.is-ok::before{background:var(--green);box-shadow:0 0 12px var(--green)}
.gate__lamp{aspect-ratio:1;border-radius:50%;display:grid;place-items:center;background:radial-gradient(circle,#2a2a2a,#151515);border:1px solid #333;transition:1s var(--ease)}
.gate__state{font-size:13px;letter-spacing:.2em;color:#888;text-align:center}
.gate__lamp.is-go{background:radial-gradient(circle,#3AD98A,#1FB26B 60%,#0e5c37);box-shadow:0 0 80px rgba(31,178,107,.55);border-color:#3AD98A}
.gate__lamp.is-go .gate__state{color:#fff;font-size:22px;font-family:var(--f-ja);font-weight:900;letter-spacing:.1em}
@media (max-width:700px){.demo--gate{grid-template-columns:1fr}.gate{grid-template-columns:1fr}.gate__lamp{width:160px;justify-self:center}}

/* CH09 night clock */
.chapter--night{background:linear-gradient(#0B0B0B,#070B18 20%,#070B18 85%,#0B0B0B)}
.demo--clock{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:32px;align-items:center;background:rgba(255,255,255,.02)}
.clock{width:100%;max-width:400px;justify-self:center}
.clock__ring{fill:none;stroke:#222;stroke-width:1}
.clock__ticks line{stroke:#3a3a3a;stroke-width:1}
.clock__ticks text{fill:#666;font:10px var(--f-mono);text-anchor:middle}
.clock__marks circle{fill:#1e2a4a;stroke:var(--blue);stroke-width:1.5;transition:fill .4s,filter .4s}
.clock__marks circle.is-human{stroke:var(--orange);fill:#3a2010}
.clock__marks circle.is-on{fill:var(--blue);filter:drop-shadow(0 0 8px var(--blue))}
.clock__marks circle.is-human.is-on{fill:var(--orange);filter:drop-shadow(0 0 8px var(--orange))}
.clock__hand{stroke:#EDEBE5;stroke-width:2;stroke-linecap:round;transform-origin:200px 200px;transition:transform .9s var(--ease)}
.clock__hub{fill:#EDEBE5}
.clock__time{font-size:clamp(48px,6vw,88px);font-weight:800;margin:0;letter-spacing:-.03em;line-height:1;font-variant-numeric:tabular-nums}
.clock__task{font-size:clamp(16px,1.5vw,20px);font-weight:700;margin:16px 0 8px;line-height:1.6;min-height:3.2em}
.clock__who{font-size:12px;letter-spacing:.2em;margin:0;color:var(--c,var(--blue))}
.timetable{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:0 24px;font-size:13px}
.timetable li{display:grid;grid-template-columns:3.6em 1fr;gap:10px;padding:10px 0;border-bottom:1px solid var(--line);color:#7d7a73;font-family:var(--f-ja);transition:color .3s;line-height:1.6}
.timetable li::before{content:attr(data-t);font-family:var(--f-mono);color:var(--c)}
.timetable li.is-on{color:#EDEBE5}
@media (max-width:760px){.demo--clock{grid-template-columns:1fr}.clock{max-width:260px}.clock__now{text-align:center}}

/* INCIDENT FILES */
.files{position:relative;height:calc(100vh + var(--fw,2400px));background:var(--ink);border-top:1px solid var(--line)}
.files__sticky{position:sticky;top:0;height:100vh;height:100svh;overflow:hidden;display:flex;flex-direction:column;justify-content:center;gap:48px;padding:96px 0 48px}
.files__head{padding:0 var(--gutter);max-width:1440px;width:100%;margin:0 auto}
.files__title{font-size:clamp(28px,3.6vw,52px);font-weight:900;line-height:1.35;margin:0 0 16px}
.files__lead{color:#a9a59c;margin:0}
.files__track{display:flex;gap:20px;padding:0 var(--gutter);will-change:transform;transform:translate3d(calc(var(--fx,0)*-1px),0,0)}
.file{flex:none;width:clamp(280px,28vw,380px);min-height:330px;border-radius:18px;background:#141414;border:1px solid var(--line);padding:28px;display:flex;flex-direction:column;position:relative;overflow:hidden}
.file::before{content:"";position:absolute;inset:0 0 auto 0;height:3px;background:var(--red);transform-origin:left;transform:scaleX(.15);transition:transform .6s var(--ease)}
.file:hover::before{transform:none}
.file__no{font-size:11px;letter-spacing:.2em;color:#FF7A70;margin:0 0 20px}
.file h3{font-size:clamp(19px,1.6vw,23px);line-height:1.55;margin:0 0 16px;font-weight:900}
.file p{color:#a9a59c;font-size:14px;margin:0;line-height:1.85}
.file .file__tag{margin-top:auto;padding-top:20px;font-size:11px;color:#666;letter-spacing:.12em}
@media (max-width:899px){
  .files{height:auto}
  .files__sticky{position:relative;height:auto;padding:100px 0}
  .files__track{overflow-x:auto;scroll-snap-type:x mandatory;transform:none;padding-bottom:12px;scrollbar-width:none}
  .files__track::-webkit-scrollbar{display:none}
  .file{scroll-snap-align:center;width:82vw;min-height:280px}
}

/* CH10 ABC */
.abc{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.abc__card{border-radius:20px;padding:28px;background:#fff;border:1px solid var(--line-ink);position:relative;overflow:hidden}
.abc__card::after{content:"";position:absolute;inset:auto 0 0 0;height:4px;background:var(--c)}
.abc__key{margin:0;font-size:72px;font-weight:900;line-height:1;color:var(--c);letter-spacing:-.04em}
.abc__card h3{font-size:20px;margin:14px 0 10px}
.abc__card p:last-child{margin:0;font-size:14.5px;color:#4a463f;line-height:1.85}
.abc__card[data-c="human"]{background:var(--ink);color:#EDEBE5}
.abc__card[data-c="human"] p:last-child{color:#C9C5BC}
@media (max-width:1000px){.abc{grid-template-columns:1fr}}

/* WALL */
.wall{padding:clamp(120px,16vh,200px) 0;border-top:1px solid var(--line)}
.wall__title{font-size:clamp(28px,4vw,60px);font-weight:900;line-height:1.3;margin:0 0 16px}
.wall__n{font-size:1.5em;color:var(--orange);font-weight:900;font-variant-numeric:tabular-nums;letter-spacing:-.03em}
.wall__lead{color:#a9a59c;margin:0 0 40px}
.wall__filter{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 28px}
.chip{height:40px;padding:0 18px;border-radius:99px;border:1px solid var(--line);font-size:13px;color:#a9a59c;display:inline-flex;align-items:center;transition:.3s}
.chip:hover{border-color:#777;color:#EDEBE5}
.chip.is-on{background:#EDEBE5;color:var(--ink);border-color:#EDEBE5}
.wall__grid{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(168px,1fr));gap:6px}
.wall__grid li{position:relative;min-height:84px;border-radius:12px;background:#141414;border:1px solid #1f1f1f;padding:12px 14px;font-size:13px;line-height:1.5;color:#D6D2C9;
  display:flex;flex-direction:column;justify-content:space-between;gap:8px;opacity:0;transform:scale(.94);transition:opacity .5s var(--ease),transform .6s var(--ease),filter .4s,background .3s}
.wall__grid.is-in li{opacity:1;transform:none;transition-delay:calc(var(--k)*12ms)}
.wall__grid li small{font-family:var(--f-mono);font-size:10px;color:#666;display:flex;align-items:center;gap:6px}
.wall__grid li small::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--c)}
.wall__link{display:block;color:inherit;text-decoration:none}
.wall__link::after{content:"";position:absolute;inset:0;border-radius:12px}
.wall__link:focus-visible{outline:none}.wall__grid li:has(.wall__link:focus-visible){outline:2px solid var(--orange);outline-offset:2px}
.wall__more{margin:36px 0 0;display:flex;flex-direction:column;gap:6px}
.wall__more a{align-self:flex-start;display:inline-flex;align-items:center;gap:10px;color:#F3F0E8;font-weight:700;font-size:clamp(17px,2vw,21px);text-decoration:none;border-bottom:2px solid var(--orange);padding:0 0 6px}
.wall__more a:hover span{transform:translateX(4px)}.wall__more a span{transition:transform .2s}
.wall__more small{color:#8d897f;font-size:12.5px}
.wall__grid li:hover{background:color-mix(in srgb,var(--c) 18%,#141414)}
.wall__grid.is-in li.is-dim{opacity:.12;filter:grayscale(1);transition-delay:0s}
@media (max-width:640px){.wall__grid{grid-template-columns:repeat(2,1fr)}}

/* OTHERS */
.others{padding:clamp(120px,16vh,200px) 0}
.others__title{font-size:clamp(26px,3.4vw,48px);font-weight:900;line-height:1.4;margin:0 0 56px}
.others__list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);column-gap:24px;border-top:1px solid var(--line-ink)}
.others__list li{padding:28px 0;border-bottom:1px solid var(--line-ink);display:flex;flex-direction:column;gap:6px}
.others__list b{font-size:18px}.others__list span{font-size:14px;color:var(--mute-ink)}
@media (max-width:900px){.others__list{grid-template-columns:1fr}}
.facts{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:72px 0 0}
.facts div{border-radius:18px;background:var(--ink);color:#EDEBE5;padding:24px 26px}
.facts dt{font-size:11px;letter-spacing:.2em;color:#888}
.facts dd{margin:8px 0 0;font-size:14px;color:#C9C5BC;display:flex;flex-direction:column}
.facts dd .en{font-size:clamp(40px,4.4vw,64px);font-weight:900;color:#fff;letter-spacing:-.03em;line-height:1.1}
@media (max-width:760px){.facts{grid-template-columns:1fr}}

/* EPILOGUE */
.epilogue{padding:clamp(140px,22vh,260px) 0 clamp(120px,16vh,200px);position:relative;overflow:hidden;border-top:1px solid var(--line)}
.epilogue::before{content:"";position:absolute;left:50%;top:40%;width:140vw;height:140vw;max-width:1800px;max-height:1800px;transform:translate(-50%,0);
  background:radial-gradient(closest-side,rgba(255,106,31,.20),rgba(122,77,255,.10) 45%,transparent 70%);pointer-events:none}
.epilogue .wrap{position:relative}
.epilogue__story{font-size:clamp(15px,1.3vw,18px);color:#B9B6AE;max-width:34em;margin:0;line-height:2}
.epilogue__title{font-size:clamp(34px,6.2vw,96px);font-weight:900;line-height:1.2;letter-spacing:-.02em;margin:0 0 36px}
.epilogue__lead{color:#C9C5BC;max-width:38em;margin:0 0 48px}
.cta{display:flex;gap:12px;flex-wrap:wrap}

/* FOOTER */
.foot{border-top:1px solid var(--line);padding:56px 0 32px;font-size:13px;color:#9a978f}
.foot__in{display:flex;justify-content:space-between;gap:40px;flex-wrap:wrap}
.foot__logo{display:flex;align-items:center;gap:6px;font-weight:800;font-size:20px;color:#EDEBE5;margin:0 0 12px}
.foot__addr{margin:0;line-height:1.9}
.foot__nav{display:grid;grid-template-columns:repeat(2,auto);gap:8px 32px;align-content:start}
.foot__nav a{text-decoration:none}.foot__nav a:hover{color:#fff}
.foot__copy{text-align:center;margin:48px 0 0;font-size:11px;color:#555}

@media (prefers-reduced-motion:reduce){
  .grain{animation:none}
  .reveal,.line>span,.surf,.wall__grid li{transition:none!important;opacity:1!important;transform:none!important}
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}

.rail.is-hidden{opacity:0;pointer-events:none}

h1,h2,h3,.quote,.chapter__catch,.story-open__title,.epilogue__title,.files__title,.wall__title,.others__title,.layer,.rw__text,.file h3{word-break:auto-phrase}

/* header legibility: blur whatever scrolls under the fixed HUD */
body::before{content:"";position:fixed;inset:0 0 auto 0;height:72px;z-index:79;pointer-events:none;
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  -webkit-mask:linear-gradient(#000 55%,transparent);mask:linear-gradient(#000 55%,transparent)}
@media (max-width:640px){body::before{height:60px}}

/* ch08: one check fails before the gate opens */
.gate li.is-ng{color:#fff;background:#3a1512;animation:shake .4s 2}
.gate li.is-ng::before{background:var(--red);box-shadow:0 0 14px var(--red)}
.gate__lamp.is-stop{background:radial-gradient(circle,#ff6b57,#d33a26 60%,#5c140c);box-shadow:0 0 70px rgba(230,70,50,.5);border-color:#ff6b57}
.gate__lamp.is-stop .gate__state{color:#fff;font-size:20px;font-weight:800}

/* incident files: a scattered case-file desk */
.file{rotate:var(--rot,0deg);transition:rotate .5s var(--ease),translate .5s var(--ease),border-color .3s}
.file:nth-child(4n+1){--rot:-1.6deg}.file:nth-child(4n+2){--rot:1.1deg;translate:0 18px}
.file:nth-child(4n+3){--rot:-.6deg;translate:0 -10px}.file:nth-child(4n){--rot:1.8deg;translate:0 8px}
.file:hover{rotate:0deg;translate:0 -6px;border-color:#3a3a3a}
.file__stamp{position:absolute;right:18px;bottom:22px;margin:0;padding:4px 10px;border:2px solid var(--red);border-radius:6px;
  color:var(--red)!important;font-size:12px!important;font-weight:700;letter-spacing:.3em;rotate:-12deg;opacity:.75}
@media (max-width:899px){.file{--rot:0deg!important;translate:none!important}}

/* small phones */
@media (max-width:400px){
  .epilogue__title{font-size:31px;line-height:1.35}
  .cta .pill{width:100%;justify-content:center}
  .wall__grid li{min-height:72px;padding:10px 11px;font-size:12px}
}

/* prologue: the iceberg */
.berg{margin:88px 0 0;position:relative}
.berg__cap{display:flex;align-items:baseline;gap:14px;margin:0 0 14px;font-size:12px;letter-spacing:.14em;color:#6f6a60}
.berg__cap b{font-size:clamp(40px,5vw,64px);font-weight:800;letter-spacing:-.03em;color:var(--ink);line-height:1;font-variant-numeric:tabular-nums}
.berg__tip{list-style:none;margin:0;padding:0 0 22px;display:flex;gap:8px;flex-wrap:wrap}
.berg__tip li{padding:10px 18px;border-radius:99px;background:#fff;border:1px solid var(--line-ink);font-weight:700;font-size:15px;box-shadow:0 6px 18px rgba(60,40,20,.08)}
.berg__sea{position:relative;border-radius:4px 4px 22px 22px;padding:40px clamp(18px,3vw,40px) 36px;color:#cfd8e6;min-height:300px;
  background:linear-gradient(180deg,#0f2742 0%,#0a1626 55%,#070d16 100%);overflow:hidden}
.berg__sea::before{content:"";position:absolute;inset:0 0 auto 0;height:2px;background:linear-gradient(90deg,transparent,#7fb4ff,transparent);opacity:.8}
.berg__sea::after{content:"";position:absolute;inset:-40% -20% auto;height:80%;background:radial-gradient(closest-side,rgba(110,170,255,.18),transparent);pointer-events:none}
.berg__cap--under{color:#7f93ad}.berg__cap--under b{color:#fff}
.berg__dots{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(30px,1fr));gap:9px}
.berg__dots li{aspect-ratio:1;border-radius:5px;background:var(--c);opacity:0;transform:translateY(-14px) scale(.6);
  transition:opacity .5s var(--ease),transform .7s var(--ease);transition-delay:calc(var(--i) * 26ms)}
.berg__dots li[data-c="ai"]{--c:var(--blue)}.berg__dots li[data-c="human"]{--c:var(--orange)}.berg__dots li[data-c="both"]{--c:var(--purple)}
.berg.is-in .berg__dots li{opacity:calc(1 - var(--i) / 110);transform:none}
.berg__dots li:hover{opacity:1;outline:2px solid #fff;outline-offset:2px}
.berg__note{margin:22px 0 0;font-size:13px;color:#8fa1b8}
@media (max-width:640px){.berg__dots{grid-template-columns:repeat(auto-fill,minmax(18px,1fr));gap:5px}}

/* chapter entrance */
.chapter__title .ch{display:inline-block;overflow:hidden;vertical-align:top;padding-bottom:.08em}
.chapter__title .ch>span{display:inline-block;transform:translateY(110%) rotate(6deg);transition:transform 1s var(--ease);transition-delay:calc(var(--i) * 70ms + .1s)}
.chapter.is-enter .chapter__title .ch>span{transform:none}
.chapter__catch{opacity:0;transform:translateY(14px);transition:opacity .9s var(--ease) .45s,transform .9s var(--ease) .45s}
.chapter.is-enter .chapter__catch{opacity:1;transform:none}
.no-js .chapter__title .ch>span,.no-js .chapter__catch{transform:none;opacity:1}
@media (prefers-reduced-motion:reduce){.chapter__title .ch>span,.chapter__catch{transform:none!important;opacity:1!important}}

/* epilogue: the reservations that came in */
.epilogue__open{display:grid;grid-template-columns:1fr minmax(300px,400px);gap:clamp(32px,5vw,80px);align-items:center;margin:0 0 88px}
.notice{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.notice li{padding:14px 18px 15px;border-radius:18px;background:rgba(40,40,40,.72);border:1px solid rgba(255,255,255,.08);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);box-shadow:0 14px 40px rgba(0,0,0,.35);
  opacity:0;transform:translateY(-18px) scale(.97);transition:opacity .6s var(--ease),transform .8s var(--ease)}
.notice li.is-on{opacity:1;transform:none}
.notice p{margin:0}
.notice__app{font-size:10.5px;letter-spacing:.08em;color:#8d8a83;display:flex;align-items:center;gap:8px}
.notice__app::before{content:"";width:16px;height:16px;border-radius:5px;background:linear-gradient(135deg,#C48A4F,#7A3E1D)}
.notice__t{font-weight:700;font-size:15px;color:#F1EFEA;margin-top:6px!important}
.notice__m{font-size:12.5px;color:#9d9a92;margin-top:2px!important}
.no-js .notice li{opacity:1;transform:none}
@media (max-width:820px){.epilogue__open{grid-template-columns:1fr;margin-bottom:64px}}

.skip{position:fixed;left:16px;top:-60px;z-index:100;padding:10px 16px;border-radius:99px;background:var(--orange);color:#fff;font-weight:700;text-decoration:none;transition:top .2s}
.skip:focus{top:12px}

/* hero: the moment everything underneath is visible */
.hero .browser{transition:box-shadow 1s var(--ease)}
.hero.is-xray-complete .browser{box-shadow:0 70px 150px -35px rgba(43,108,255,.55)}
/* reading progress */
body::after{content:"";position:fixed;left:0;top:0;z-index:81;height:2px;width:100%;background:var(--orange);transform-origin:left;transform:scaleX(var(--pagep,0));pointer-events:none}

/* ====== CH11 その「人」とは ====== */
.sp-only{display:none}
@media (max-width:600px){.sp-only{display:inline}}
.prose .prose__strong{font-size:clamp(20px,2vw,26px);line-height:1.7;font-weight:700;color:#fff}
.aionly{margin:0;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:24px;align-items:start}
.aionly__bar{grid-column:1/-1;display:flex;justify-content:space-between;font-size:12px;color:var(--mute);border-bottom:1px dashed var(--line);padding-bottom:10px}
.aionly__page{container-type:inline-size;background:#F4F4F2;color:#2a2a2a;border-radius:16px;padding:7% 6% 8%;position:relative;filter:saturate(.2)}
.aionly__page::after{content:"AI";position:absolute;top:12px;right:12px;font:700 11px var(--f-mono);color:#fff;background:var(--blue);border-radius:99px;padding:3px 9px}
.aionly__eyebrow{font-size:3.4cqw;color:#888;margin:0 0 2cqw}
.aionly__h{font-family:"Noto Serif JP",serif;font-size:9cqw;line-height:1.3;margin:0 0 3cqw;font-weight:700}
.aionly__p{font-size:3.6cqw;color:#666;margin:0 0 5cqw;line-height:1.7}
.aionly__btn{display:inline-block;font-size:3.4cqw;background:#555;color:#fff;border-radius:99px;padding:2cqw 5cqw}
.aionly__cards{list-style:none;padding:0;margin:6cqw 0 0;display:grid;grid-template-columns:repeat(3,1fr);gap:2cqw}
.aionly__cards li{font-size:3cqw;background:#e2e2df;border-radius:8px;padding:6cqw 2cqw 2cqw;color:#777}
.aionly__notes{list-style:none;margin:0;padding:0;display:grid;gap:14px}
.aionly__notes li{border-left:2px solid var(--red);padding:2px 0 2px 16px;font-size:14px;line-height:1.85;color:#cfccc4}
.aionly__notes b{display:block;color:#fff;font-size:15px;margin-bottom:2px}
@media (max-width:760px){.aionly{grid-template-columns:1fr}}
.we{border-top:1px solid var(--line);padding-top:40px}
.we__lead{font-size:clamp(34px,4.6vw,64px);font-weight:900;margin:0 0 24px;letter-spacing:.02em;
  background:linear-gradient(90deg,var(--orange),var(--purple));-webkit-background-clip:text;background-clip:text;color:transparent}
.we__body{font-size:clamp(17px,1.5vw,21px);line-height:2.15;margin:0;color:#EDEBE5;font-weight:500}

/* ====== TEAM：役割の違うメンバーが裏で試作を直していく ====== */
.team{background:#070707;padding:clamp(96px,14vh,160px) var(--gutter);position:relative;border-top:1px solid var(--line)}
.team__intro{max-width:760px;margin:0 auto clamp(48px,8vh,96px);text-align:center}
.team__title{font-size:clamp(34px,4.8vw,68px);line-height:1.25;margin:0 0 20px;font-weight:900}
.team__lead{color:#bdbab2;line-height:2;margin:0}
.team__grid{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:clamp(24px,5vw,80px);max-width:1280px;margin:0 auto}
.team__stagewrap{grid-column:2;grid-row:1;position:relative}
.team__stage{position:sticky;top:96px;display:grid;grid-template-columns:auto minmax(0,1fr);gap:20px;align-items:start}
.team__steps{grid-column:1;grid-row:1;list-style:none;margin:0;padding:0}
.team__step{min-height:72vh;display:flex;flex-direction:column;justify-content:center;opacity:.28;transition:opacity .5s var(--ease)}
.team__step.is-cur{opacity:1}
.team__role{display:flex;align-items:baseline;gap:12px;font-size:clamp(22px,2.2vw,30px);font-weight:900;margin:0 0 14px}
.team__role .en{font:600 13px var(--f-mono);color:var(--orange)}
.team__role small{font-size:13px;font-weight:500;color:var(--mute);margin-left:4px}
.team__say{margin:0 0 12px;font-size:clamp(17px,1.4vw,20px);line-height:1.8;color:#fff;font-weight:700}
.team__did{margin:0 0 18px;color:#bdbab2;line-height:1.95;font-size:15px}
.team__split{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:0}
.team__split div{border:1px solid var(--line);border-radius:12px;padding:10px 14px}
.team__split dt{font:700 11px var(--f-mono);letter-spacing:.1em;margin-bottom:4px}
.team__split div:first-child dt{color:var(--blue)}
.team__split div:last-child dt{color:var(--orange)}
.team__split dd{margin:0;font-size:13px;line-height:1.6;color:#dcd9d1}
.team__outro{text-align:center;font-size:clamp(20px,2.2vw,30px);line-height:1.8;font-weight:700;margin:clamp(64px,10vh,120px) 0 0}

/* roster：役割のランプ */
.team__roster{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.team__roster li{display:flex;align-items:center;gap:8px;font-size:12px;color:#6f6d68;transition:color .4s;white-space:nowrap}
.team__roster i{flex:none;width:9px;height:9px;border-radius:50%;border:1px solid #4a4945;transition:background .4s,border-color .4s,box-shadow .4s}
.team__roster li.is-on{color:#d9d6ce}
.team__roster li.is-on i{background:var(--orange);border-color:var(--orange)}
.team__roster li.is-cur{color:#fff;font-weight:700}
.team__roster li.is-cur i{box-shadow:0 0 0 4px rgba(255,106,31,.25)}
.team__now{grid-column:1/-1;margin:0;font-size:12px;color:var(--mute);text-align:right}
.team__now span{color:var(--orange);font-size:15px}

/* proto：舞台の上の試作 */
.proto{container-type:inline-size;position:relative;border-radius:14px;background:#1b1b1b;border:1px solid var(--line);box-shadow:0 40px 90px -40px rgba(0,0,0,.9)}
.proto__bar{display:flex;align-items:center;gap:6px;padding:10px 12px;border-bottom:1px solid var(--line);font-size:11px;color:var(--mute)}
.proto__bar i{width:8px;height:8px;border-radius:50%;background:#3a3a3a}
.proto__bar span{margin-left:8px}
.proto__badge{margin-left:auto;font-style:normal;font-size:10px;border-radius:99px;padding:3px 9px;background:var(--blue);color:#fff;transition:background .5s}
.proto__view{background:#F2F2F0;color:#2a2a2a;border-radius:0 0 14px 14px;padding:3cqw 4cqw 4cqw;overflow:hidden;transition:background .8s var(--ease),color .8s}
.proto__nav{display:flex;align-items:center;gap:3cqw;font-size:max(9px,2.2cqw);margin-bottom:3cqw;color:#777}
.proto__nav b{margin-right:auto;color:#333;font-size:max(10px,2.6cqw)}
.proto__navcta{display:none;background:var(--brown);color:#fff;border-radius:99px;padding:.6cqw 2cqw}
.proto__hero{display:grid;grid-template-columns:1.1fr 1fr;gap:3cqw;align-items:center;background:#e4e4e1;border-radius:2cqw;padding:5cqw 4cqw;transition:background .8s,outline-color .4s}
.proto__eyebrow{grid-column:1;font-size:max(9px,2.1cqw);margin:0;color:#888}
.proto__h{grid-column:1;font-family:"Noto Serif JP",serif;font-weight:700;font-size:6.4cqw;line-height:1.3;margin:0}
.proto__btn{grid-column:1;margin:0}
.proto__btn span{display:inline-block;font-size:max(9px,2.2cqw);background:#555;color:#fff;border-radius:99px;padding:1.2cqw 3.4cqw}
.proto__photo{grid-column:2;grid-row:1/span 3;aspect-ratio:4/3;border-radius:1.6cqw;background:#cfcfcb;display:grid;place-items:center;font-size:max(9px,2cqw);color:#888;transition:background .8s}
.proto__tour,.proto__form{display:flex;align-items:center;gap:2cqw;margin-top:2.4cqw;font-size:max(9px,2.1cqw);border-radius:1.6cqw;padding:0 3cqw;max-height:0;opacity:0;overflow:hidden;transition:max-height .7s var(--ease),opacity .5s,padding .7s}
.proto__tour b{margin-right:1cqw}
.proto__tour span,.proto__form span{background:#fff;border:1px solid #e5ddd0;border-radius:99px;padding:.6cqw 2cqw;color:#555}
.proto__form b{margin-left:auto;background:var(--brown);color:#fff;border-radius:99px;padding:.8cqw 3cqw}
/* 切り替わる文言（a=AI下書き / b=人の手が入った後） */
.proto .b{display:none}
.proto__fx{position:absolute;font-size:12px;border-radius:12px;padding:9px 13px;background:#fff;color:#222;box-shadow:0 18px 40px -12px rgba(0,0,0,.6);opacity:0;transform:translateY(10px) scale(.96);transition:opacity .5s var(--ease),transform .6s var(--ease);pointer-events:none;line-height:1.5}
.proto__fx b{display:block;font-size:11px;color:var(--brown)}
.proto__fx--notify{right:-14px;top:22%}
.proto__fx--ad{left:-14px;bottom:24%;background:var(--purple);color:#fff}
.proto__fx--speed{right:18px;top:52px;background:var(--green);color:#fff;display:flex;gap:8px;align-items:baseline}
.proto__fx--speed b{color:#fff;font-size:14px;display:inline}
.proto__fx--support{right:-10px;bottom:-18px}
.proto__fx--support em{font-style:normal;color:var(--green);font-weight:700;margin-left:4px}

/* 役割ごとの変化（その役割まで進んだら累積で残る） */
.team__stage.did-goal .proto__btn .a,.team__stage.did-head .proto__h .a,.team__stage.did-copy .proto__eyebrow .a,.team__stage.did-look .proto__photo .a{display:none}
.team__stage.did-goal .proto__btn .b,.team__stage.did-head .proto__h .b,.team__stage.did-copy .proto__eyebrow .b,.team__stage.did-look .proto__photo .b{display:inline}
.team__stage.did-goal .proto__btn span{background:var(--brown)}
.team__stage.did-goal .proto__navcta{display:inline-block}
.team__stage.did-tour .proto__tour{max-height:12cqw;opacity:1;padding:2cqw 3cqw;background:#fff8ec}
.team__stage.did-look .proto__view{background:#F7EFE2;color:#3b2414}
.team__stage.did-look .proto__hero{background:linear-gradient(135deg,#E9C99A,#C99560)}
.team__stage.did-look .proto__photo{background:radial-gradient(120% 90% at 30% 20%,#f3d9ae,#8a5a32 70%);color:#fff7e8}
.team__stage.did-look .proto__eyebrow{color:#6d4a2c}
.team__stage.did-form .proto__form{max-height:12cqw;opacity:1;padding:2cqw 3cqw;background:#fff}
.team__stage.did-notify .proto__fx--notify,.team__stage.did-ad .proto__fx--ad,.team__stage.did-speed .proto__fx--speed,.team__stage.did-support .proto__fx--support{opacity:1;transform:none}
.team__stage.did-support .proto__badge{background:var(--green)}
/* いま手を入れている所を光らせる */
.team__stage[data-act="goal"] .proto__btn span,.team__stage[data-act="goal"] .proto__navcta,
.team__stage[data-act="head"] .proto__h,.team__stage[data-act="tour"] .proto__tour,
.team__stage[data-act="copy"] .proto__eyebrow,.team__stage[data-act="look"] .proto__hero,
.team__stage[data-act="form"] .proto__form{outline:2px solid var(--orange);outline-offset:3px}

@media (max-width:900px){
  .team__grid{grid-template-columns:1fr}
  .team__stagewrap{grid-column:1;grid-row:1;position:sticky;top:58px;z-index:2;background:#070707;margin:0 calc(var(--gutter)*-1);padding:8px var(--gutter) 10px}
  .team__stage{position:static;grid-template-columns:1fr;gap:10px}
  .team__roster{display:flex;flex-wrap:wrap;gap:4px 10px}
  .team__roster li span{display:none}
  .team__roster li.is-cur span{display:inline}
  .team__steps{grid-row:2}
  .team__step{min-height:70vh;justify-content:flex-end;padding-bottom:8vh}
  .proto__fx{font-size:10px;padding:6px 9px}
  .proto__fx--notify{right:6px}.proto__fx--ad{left:6px}.proto__fx--support{right:6px;bottom:6px}
  .team__now{text-align:left}
}
@media (prefers-reduced-motion:reduce){.team__step{opacity:1}}

/* ====== デモサイトの写真（AI生成・架空の蔵） ====== */
/* hero のブラウザ：写真を全面に敷き、左を暗くして文字を読ませる */
.site--front .site__hero{position:relative;overflow:hidden;color:#FFF7EA;
  background:linear-gradient(90deg,rgba(28,16,8,.78) 0%,rgba(28,16,8,.45) 42%,rgba(28,16,8,0) 70%),url("../img/kura-hero.webp") center/cover no-repeat}
.site--front .site__heroText small{opacity:.85}
.site--front .site__heroText strong{text-shadow:0 2px 18px rgba(0,0,0,.35)}
.site--front .site__barrel{visibility:hidden}
.site__cards i{background-size:cover!important;background-position:center!important}
.site__cards i.c1{background-image:url("../img/kura-outside.webp")}
.site__cards i.c2{background-image:url("../img/miso-kinds.webp")}
.site__cards i.c3{background-image:url("../img/kura-tour.webp")}
.site__cards i{inset:0 0 46% 0}

/* ch05 スマホ：同じ写真が重い→軽い */
.dv--hero::before{background:linear-gradient(90deg,rgba(28,16,8,.7),rgba(28,16,8,.1) 75%),url("../img/kura-hero.webp") center/cover}
.dv__h{color:#FFF7EA}
.dv__barrel{display:none}
.dv__img{background-size:cover!important;background-position:center!important;aspect-ratio:1.6}
.dv--a .dv__img{background-image:url("../img/kura-outside.webp")}
.dv--b .dv__img{background-image:url("../img/miso-kinds.webp")}
.dv--c .dv__img{background-image:url("../img/kura-tour.webp")}

/* SNSでシェアされた時のカード */
.share__img{background:url("../img/miso-taru.webp") center/cover}

/* AIだけで作った試作：無難なストック写真 */
.aionly__photo{display:block;aspect-ratio:16/9;border-radius:10px;margin:0 0 5cqw;background:url("../img/stock-generic.webp") center/cover}

/* 試作（人の手が入っていく）：商品写真 → 蔵の中の手仕事 */
.proto__photo{background:#fff url("../img/stock-generic.webp") center/cover;overflow:hidden;position:relative}
.proto__photo::after{content:"";position:absolute;inset:0;background:url("../img/hands-miso.webp") center/cover;opacity:0;transition:opacity .9s var(--ease)}
.team__stage.did-look .proto__photo{background:#fff url("../img/stock-generic.webp") center/cover}
.team__stage.did-look .proto__photo::after{opacity:1}
.proto__photo span{position:absolute;left:6px;bottom:6px;z-index:1;font:600 max(8px,1.7cqw)/1 var(--f-mono);color:#fff;background:rgba(0,0,0,.45);border-radius:99px;padding:.8cqw 1.8cqw}
.team__stage.did-look .proto__hero{background:linear-gradient(135deg,#EBD3AE,#D5A877)}

/* 章見出しの補足（検索向けに工程名を言葉で添える） */
.chapter__sub{display:block;margin-top:14px;font-size:12px;font-weight:400;letter-spacing:.14em;line-height:1.5;color:var(--mute)}
@media (max-width:900px){.chapter__sub{margin-top:6px;font-size:11px}}
.paper .chapter__sub{color:var(--mute-ink)}
.chapter__sub{opacity:0;transition:opacity .8s var(--ease) .5s}
.chapter.is-enter .chapter__sub,.no-js .chapter__sub{opacity:1}
@media (prefers-reduced-motion:reduce){.chapter__sub{opacity:1!important}}

/* 2026-10-07 段階ページへの静的リンク（JSが動かない読み手にも届くように）・このページについて */
.wall__phases{margin:28px 0 0}
.wall__phases ol{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:8px 10px;counter-reset:ph}
.wall__phases li{counter-increment:ph}
.wall__phases a{display:inline-flex;align-items:center;gap:8px;padding:7px 14px;border:1px solid rgba(243,240,232,.22);border-radius:999px;color:#C9C5BC;font-size:13.5px;text-decoration:none;transition:border-color .2s,color .2s}
.wall__phases a::before{content:counter(ph,decimal-leading-zero);font-family:'JetBrains Mono',monospace;font-size:11px;color:#8d897f}
.wall__phases a:hover{border-color:var(--orange);color:#F3F0E8}
.about-page{margin:56px 0 0;padding:28px 0 0;border-top:1px solid var(--line-ink);max-width:760px}
.about-page p{margin:0 0 12px;font-size:14.5px;line-height:1.9}
.about-page .eyebrow{margin-bottom:10px}
.about-page__date{font-size:12px;color:var(--mute-ink)}