:root{--arka-red: #C13127;--arka-burgundy: #781214;--ink: #0A0A0A;--paper: #FFFFFF;--paper-warm: #FAF8F7;--line: rgba(10, 10, 10, .14);--line-soft: rgba(10, 10, 10, .08);--muted: rgba(10, 10, 10, .62);--dark-surface: #0D0B0B;--dark-text: rgba(255, 255, 255, .92);--dark-muted: rgba(255, 255, 255, .64);--dark-line: rgba(255, 255, 255, .16);--font-sans: "proxima-nova", "Proxima Nova", "Mulish", "Helvetica Neue", Arial, sans-serif;--font-tech: "Blender Pro", "Chakra Petch", "Mulish", monospace, sans-serif;--text-xs: .75rem;--text-sm: .875rem;--text-base: 1rem;--text-lg: clamp(1.125rem, 1rem + .5vw, 1.375rem);--text-title: clamp(2rem, 1.2rem + 3.4vw, 4rem);--text-display: clamp(3rem, 1.4rem + 9.5vw, 10.5rem);--gutter: clamp(1.25rem, 4vw, 4.5rem);--section-gap: clamp(5rem, 12vh, 10rem);--max-w: 84rem;--notch: .75rem;--ease-out: cubic-bezier(.16, 1, .3, 1);--dur-fast: .18s;--dur: .32s;--dur-slow: .64s;--z-header: 100;--z-menu: 200;--z-progress: 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.section__label{color:var(--dark-text)}.section__head--dark .section__no,.section--dark .step__no{color:#e05448}.section__rule{flex:1;align-self:center;height:10px;position:relative}.section__rule:before{content:"";position:absolute;left:0;right:9px;top:50%;border-top:1px solid var(--arka-red)}.section__rule:after{content:"";position:absolute;right:0;top:50%;width:12px;border-top:1px solid var(--arka-red);transform:rotate(45deg);transform-origin:left top}.section__title{font-weight:800;font-size:var(--text-title);line-height:1.04;letter-spacing:.01em;text-transform:uppercase;max-width:18ch}.section__intro{max-width:44rem;margin-top:1.75rem;font-size:var(--text-lg);font-weight:300;line-height:1.65;color:var(--muted)}.section__intro--dark{color:var(--dark-muted)}.site-header{position:fixed;top:0;left:0;right:0;z-index:var(--z-header);display:flex;align-items:center;gap:2rem;padding:0 var(--gutter);height:4.5rem;background:#fff0;transition:background-color var(--dur) var(--ease-out),box-shadow var(--dur) var(--ease-out)}.site-header.is-scrolled{background:#ffffffeb;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);box-shadow:0 1px 0 var(--line-soft)}.brand{display:block;flex-shrink:0}.brand__lockup{height:1.75rem;width:auto}.brand__mark path{fill:var(--arka-red)}.brand__word path{fill:var(--ink);transition:fill var(--dur) var(--ease-out)}.site-nav{margin-left:auto}.site-nav ul{display:flex;gap:clamp(1rem,2.5vw,2.25rem)}.site-nav a{display:inline-flex;align-items:center;gap:.4rem;padding:.5rem 0;font-family:var(--font-tech);font-size:var(--text-xs);font-weight:500;letter-spacing:.18em;text-transform:uppercase;white-space:nowrap;position:relative}.site-nav__no{color:var(--arka-red);font-weight:600}.site-nav a:after{content:"";position:absolute;left:0;bottom:0;width:100%;height:1px;background:var(--arka-red);transform:scaleX(0);transform-origin:right;transition:transform var(--dur) var(--ease-out)}.site-nav a:hover:after,.site-nav a[aria-current=true]:after{transform:scaleX(1);transform-origin:left}.header-cta{flex-shrink:0;min-height:2.5rem;padding:.5rem 1.25rem}.lang-switch{display:flex;align-items:center;gap:.5rem;flex-shrink:0;font-family:var(--font-tech);font-size:var(--text-xs);font-weight:500;letter-spacing:.14em}.lang-switch span{color:var(--line)}.lang-switch a{padding:.5rem .1rem;color:var(--muted);transition:color var(--dur-fast)}.lang-switch a:hover{color:var(--arka-red)}.lang-switch a[aria-current=true]{color:var(--ink);font-weight:600}.mobile-menu a.mobile-menu__lang{margin-top:1.5rem;font-size:1rem;font-weight:600;letter-spacing:.12em;opacity:.85}.site-footer__lang a{color:var(--dark-muted)}.site-footer__lang a:hover{color:#fff}.nav-toggle{display:none;flex-direction:column;justify-content:center;gap:7px;width:44px;height:44px;margin-left:auto}.nav-toggle span{display:block;height:2px;width:26px;margin:0 auto;background:var(--ink);transition:transform var(--dur) var(--ease-out),opacity var(--dur) 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.site-header{background:transparent;box-shadow:none}body.menu-open .site-header{z-index:calc(var(--z-menu) + 1)}body.menu-open .brand__mark path,body.menu-open .brand__word path{fill:#fff}body.menu-open .header-cta{visibility:hidden}.scroll-progress{position:fixed;top:0;left:0;right:0;height:2px;z-index:var(--z-progress);pointer-events:none}.scroll-progress i{display:block;height:100%;width:100%;background:var(--arka-red);transform:scaleX(0);transform-origin:left}.hero{position:relative;min-height:100svh;display:flex;flex-direction:column;justify-content:flex-end;padding:7rem var(--gutter) 4.5rem;overflow:hidden}.hero__pattern{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;pointer-events:none}.hero__inner{position:relative;max-width:var(--max-w);margin:0 auto;width:100%}.hero .kicker{display:block;margin-bottom:1.25rem}.hero__title{font-size:var(--text-display);font-weight:800;line-height:.94;letter-spacing:.01em;text-transform:uppercase}.hero__line{display:block;overflow:hidden}.hero__line>span{display:inline-block}.hero__line--unseen>span{color:transparent;-webkit-text-stroke:1.5px var(--ink);position:relative}.hero__foot{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:2rem;margin-top:clamp(2rem,5vh,3.5rem)}.hero__lede{max-width:34rem;font-size:var(--text-lg);font-weight:300;line-height:1.65;color:var(--muted)}.hero__cta-group{display:flex;flex-direction:column}.hero__actions{display:flex;flex-wrap:wrap;gap:.75rem}.hero__chat-note{margin-top:.85rem;max-width:24rem;font-size:var(--text-sm);font-weight:300;color:var(--muted)}.hero__scrollhint{position:absolute;right:var(--gutter);bottom:1.5rem;display:inline-flex;align-items:center;gap:.6rem;font-family:var(--font-tech);font-size:var(--text-xs);letter-spacing:.2em;text-transform:uppercase;color:var(--muted)}.hero__scrollhint svg{width:11px;height:13px;animation:nudge 2.4s var(--ease-out) infinite}@keyframes nudge{0%,to{transform:translateY(0)}50%{transform:translateY(4px)}}.manifesto{max-width:56rem}.manifesto__line{font-size:clamp(1.6rem,1rem + 2.6vw,3.25rem);font-weight:700;line-height:1.18;letter-spacing:.005em}.manifesto__line em{font-style:normal;color:var(--arka-red)}.manifesto__line--red{color:var(--arka-red);margin-top:1.5rem}.manifesto__line+.manifesto__line{margin-top:.35rem}.philosophy__body{display:grid;grid-template-columns:repeat(auto-fit,minmax(19rem,1fr));gap:clamp(1.5rem,4vw,4rem);margin-top:clamp(2.5rem,7vh,5rem);max-width:62rem}.philosophy__col p{color:var(--muted);font-weight:300;font-size:var(--text-lg);line-height:1.7}.philosophy__col p+p{margin-top:1.25rem}.philosophy__note{position:relative;padding-left:1.6rem}.philosophy__note strong{color:var(--arka-red);font-weight:700}.q-mark{position:absolute;left:0;top:.62em;width:14px;height:8px;background:var(--arka-red);transform:skew(-45deg)}.steps{position:relative;margin-top:clamp(3rem,8vh,5.5rem);padding-left:clamp(1.75rem,4vw,3rem)}.steps__path{position:absolute;left:5px;top:.5rem;bottom:.5rem;width:2px;height:calc(100% - 1rem);color:var(--line)}.steps__path path{stroke-dasharray:100;stroke-dashoffset:100;color:var(--arka-red);transition:stroke-dashoffset 1.2s var(--ease-out)}.steps.is-drawn .steps__path path{stroke-dashoffset:0}.step{position:relative;display:grid;grid-template-columns:minmax(12rem,20rem) 1fr;gap:clamp(1.25rem,3vw,3.5rem);padding:clamp(1.75rem,4vh,3rem) 0}.step+.step{border-top:1px solid var(--line-soft)}.step__marker{position:absolute;left:calc(-1*clamp(1.75rem,4vw,3rem) - 1px);top:calc(clamp(1.75rem,4vh,3rem) + .55rem)}.step__marker i{display:block;width:13px;height:7px;background:var(--arka-red);transform:skew(-45deg) translate(2px)}.step__no{display:block;font-family:var(--font-tech);font-weight:600;font-size:var(--text-sm);letter-spacing:.2em;color:var(--arka-red);margin-bottom:.4rem}.step__head h4{font-size:clamp(1.5rem,1.1rem + 1.6vw,2.4rem);font-weight:800;text-transform:uppercase;letter-spacing:.01em;line-height:1.05}.step__body p{color:var(--muted);font-weight:300;line-height:1.7;max-width:38rem}.step__outcome{margin-top:1.1rem;font-weight:400;color:var(--ink)!important}.step__outcome span{display:block;font-family:var(--font-tech);font-size:var(--text-xs);font-weight:500;letter-spacing:.2em;text-transform:uppercase;color:var(--arka-red);margin-bottom:.25rem}.approach__coda{margin-top:clamp(2.5rem,6vh,4rem);max-width:40rem;font-size:var(--text-lg);font-weight:400;border-left:2px solid var(--arka-red);padding-left:1.5rem}.capabilities{margin-top:clamp(2.5rem,7vh,4.5rem);border-top:1px solid var(--line)}.capability{border-bottom:1px solid var(--line)}.capability__row{display:grid;grid-template-columns:3.5rem minmax(12rem,1fr) 2fr 2.5rem;align-items:baseline;gap:1rem;width:100%;padding:1.35rem 0;text-align:left;transition:color var(--dur-fast) var(--ease-out)}.capability__no{font-family:var(--font-tech);font-size:var(--text-sm);font-weight:500;letter-spacing:.14em;color:var(--arka-red)}.capability__name{font-size:clamp(1.15rem,1rem + 1vw,1.7rem);font-weight:700;text-transform:uppercase;letter-spacing:.01em;line-height:1.15}.capability__serves{font-weight:300;color:var(--muted);font-size:var(--text-base)}.capability__toggle{position:relative;justify-self:end;align-self:center;width:15px;height:15px}.capability__toggle:before,.capability__toggle:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;margin:auto;background:var(--arka-red);transition:transform var(--dur) var(--ease-out)}.capability__toggle:before{width:15px;height:1.5px}.capability__toggle:after{width:1.5px;height:15px}.capability__row[aria-expanded=true] .capability__toggle:after{transform:rotate(90deg)}.capability__row:hover .capability__name{color:var(--arka-red)}.capability__why{display:grid;grid-template-rows:0fr;transition:grid-template-rows var(--dur-slow) var(--ease-out)}.capability__why>p{overflow:hidden;min-height:0;max-width:44rem;margin-left:4.5rem;color:var(--muted);font-weight:300;line-height:1.7}.capability.is-open .capability__why{grid-template-rows:1fr}.capability.is-open .capability__why>p{padding-bottom:1.6rem}.section--dark{max-width:none;background:var(--dark-surface);color:var(--dark-text);padding:0}.network__canvas{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%}.network__content{position:relative;max-width:var(--max-w);margin:0 auto;padding:var(--section-gap) var(--gutter);pointer-events:none}.network__content a,.network__content button,.network__content summary{pointer-events:auto}.section--dark .section__intro{color:var(--dark-muted)}.network__hint{margin-top:1.5rem;font-family:var(--font-tech);font-size:var(--text-xs);letter-spacing:.2em;text-transform:uppercase;color:#fff6}.network__split{display:grid;grid-template-columns:repeat(auto-fit,minmax(18rem,1fr));gap:clamp(1.5rem,4vw,4rem);margin-top:clamp(14rem,34vh,22rem);max-width:62rem}.network__side-label{font-family:var(--font-tech);font-size:var(--text-sm);font-weight:500;letter-spacing:.24em;text-transform:uppercase;color:var(--arka-red);margin-bottom:.9rem;filter:brightness(1.35)}.network__side p{color:var(--dark-muted);font-weight:300;line-height:1.7}.network__side .btn{margin-top:1.4rem}.answers{margin-top:clamp(2.5rem,7vh,4.5rem);border-top:1px solid var(--line);max-width:56rem}.answer{border-bottom:1px solid var(--line)}.answer summary{display:flex;align-items:baseline;gap:1.1rem;list-style:none;cursor:pointer;padding:1.4rem 0;font-size:clamp(1.05rem,1rem + .7vw,1.45rem);font-weight:700;transition:color var(--dur-fast) var(--ease-out)}.answer summary::-webkit-details-marker{display:none}.answer summary:hover{color:var(--arka-red)}.answer__marker{flex-shrink:0;width:13px;height:7px;background:var(--arka-red);transform:skew(-45deg);transition:transform var(--dur) var(--ease-out)}.answer[open] .answer__marker{transform:skew(-45deg) scaleX(1.6)}.answer__body{padding:0 0 1.6rem 2.05rem}.answer__body p{color:var(--muted);font-weight:300;line-height:1.7;max-width:44rem}.initiative{background:var(--paper-warm);border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft)}.initiative__inner{max-width:var(--max-w);margin:0 auto;padding:clamp(3rem,8vh,5rem) var(--gutter)}.initiative__body{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(15rem,1fr);gap:clamp(1.75rem,5vw,4rem);align-items:end;margin-top:1.5rem}.initiative__title{display:flex;align-items:center;flex-wrap:wrap;gap:.9rem;font-size:clamp(1.75rem,1.2rem + 2.2vw,3rem);font-weight:800;line-height:1.04;letter-spacing:.01em;text-transform:uppercase}.initiative__lang{padding:.3rem .55rem;font-family:var(--font-tech);font-size:var(--text-xs);font-weight:500;letter-spacing:.14em;text-transform:none;color:var(--arka-red);box-shadow:inset 0 0 0 1px var(--arka-red)}.initiative__lede{max-width:40rem;margin-top:1.25rem;font-size:var(--text-lg);font-weight:300;line-height:1.65;color:var(--muted)}.initiative__action{justify-self:start}.initiative__note{max-width:22rem;margin-top:.85rem;font-size:var(--text-sm);font-weight:300;color:var(--muted)}.contact{position:relative;background:var(--arka-red);color:#fff;overflow:hidden}.contact__pattern{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;opacity:.55}.contact__inner{position:relative;max-width:var(--max-w);margin:0 auto;padding:var(--section-gap) var(--gutter)}.contact__title{margin-top:1.25rem;font-size:var(--text-title);font-weight:800;text-transform:uppercase;line-height:1.04;letter-spacing:.01em}.contact__lede{max-width:38rem;margin-top:1.75rem;font-size:var(--text-lg);font-weight:300;line-height:1.65;color:#ffffffe0}.contact__actions{display:flex;flex-wrap:wrap;gap:.75rem;margin-top:2.5rem}.contact__address{margin-top:3rem;font-family:var(--font-tech);font-size:var(--text-sm);letter-spacing:.08em;line-height:1.8;color:#ffffffbf}.site-footer{background:var(--ink);color:var(--dark-text);padding:clamp(3.5rem,8vh,6rem) var(--gutter) 2rem}.site-footer__top,.site-footer__grid,.site-footer__base{max-width:var(--max-w);margin:0 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p{font-family:var(--font-tech);font-size:var(--text-xs);letter-spacing:.12em;text-transform:uppercase;color:#fff6}.chat-panel{position:fixed;top:0;right:0;bottom:0;left:0;z-index:500;display:flex;align-items:flex-end;justify-content:flex-end;padding:clamp(0px,2vw,1.5rem)}.chat-panel[hidden]{display:none}.chat-panel__scrim{position:fixed;top:0;right:0;bottom:0;left:0;background:#0a0a0a52;opacity:0;transition:opacity var(--dur) var(--ease-out);cursor:pointer}.chat-panel.is-open .chat-panel__scrim{opacity:1}.chat-panel__sheet{position:relative;display:flex;flex-direction:column;width:min(408px,100vw);height:min(680px,100dvh);background:var(--paper);box-shadow:0 24px 64px #0a0a0a47;transform:translateY(24px) scale(.98);opacity:0;transition:transform var(--dur-slow) var(--ease-out),opacity var(--dur-slow) var(--ease-out);clip-path:polygon(0 0,calc(100% - 1.25rem) 0,100% 1.25rem,100% 100%,0 100%)}.chat-panel.is-open 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.contact__title{letter-spacing:.04em;line-height:1.22;max-width:24ch}html[lang=ja] .manifesto__line{line-height:1.4;font-size:clamp(1.4rem,1rem + 2.2vw,2.7rem)}html[lang=ja] .step__head h4{letter-spacing:.04em}html[lang=ja] .capability__name{letter-spacing:.04em;font-size:clamp(1.05rem,1rem + .8vw,1.45rem)}html[lang=ja] .hero__lede,html[lang=ja] .section__intro,html[lang=ja] .step__body p,html[lang=ja] .philosophy__col p,html[lang=ja] .answer__body p,html[lang=ja] .network__side p,html[lang=ja] .hero__chat-note,html[lang=ja] .mobile-menu__cta-note,html[lang=ja] .contact__lede{line-height:1.95}html[lang=ja] .answer summary{line-height:1.5}html[lang=ja] 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