@keyframes drift{0%{transform:translate(0,0)}to{transform:translate(6vw,4vw)}}@keyframes segfill{0%{width:0}to{width:100%}}@keyframes panein{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}@keyframes nudge{0%,to{transform:translateX(-1px)}30%{transform:translateX(-26px)}65%{transform:translateX(20px)}}@keyframes dashflow{to{stroke-dashoffset:-.1}}:root{--bg:#f4f6f8;--surface:#ffffff;--panel:#fbfcfd;--ink:#0f1b2d;--ink2:#44566b;--muted:#5b6675;--line:#e5e9ef;--line2:#eef1f5;--tint:#eaf1f7;--accent:#1a4e7a;--accent-d:#143e61;--pos:#1b7a45;--posbg:#e9f4ec;--warn:#9a6700;--warnbg:#fbf3e2;--neg:#b3261e;--negbg:#fbecea;--grad-a:#1a4e7a;--grad-b:#1a4e7a;--sh-1:0 1px 2px #0f1b2d0d;--sh-2:0 10px 30px #0f1b2d12;--sh-3:0 24px 60px #0f1b2d1a;--ease:cubic-bezier(.22,1,.36,1)}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{font-family:"Inter",-apple-system,BlinkMacSystemFont,sans-serif;background:var(--bg);color:var(--ink);line-height:1.65;font-size:16px;-webkit-font-smoothing:antialiased}img,svg{display:block;max-width:100%}.crumbs a:hover,a{color:var(--accent)}h1,h2,h3{text-wrap:pretty}h1{font-size:clamp(31px,6vw,52px);line-height:1.08;letter-spacing:-.035em}h2,h3{letter-spacing:-.02em}h1,h2{font-weight:800}h2{font-size:clamp(23px,4.5vw,40px);line-height:1.12}h3{font-size:19px;font-weight:700;line-height:1.28}.num{font-variant-numeric:tabular-nums}.container{max-width:1180px;margin:0 auto;padding:0 24px}.section{padding:80px 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24px;border-radius:11px;background:var(--accent);color:#fff;font-weight:700;font-size:15px;text-decoration:none;border:0;cursor:pointer;transition:background .25s var(--ease),transform .25s var(--ease),box-shadow .25s var(--ease);box-shadow:var(--sh-1);will-change:transform}.btn:hover{background:var(--accent-d);box-shadow:var(--sh-2)}.btn svg{flex:none}#progress{position:fixed;top:0;left:0;height:3px;width:0;background:linear-gradient(90deg,var(--grad-a),var(--grad-b));z-index:200}.hero{position:relative;overflow:hidden;padding:80px 0 32px;text-align:center}.hero .beams{position:absolute;inset:0;pointer-events:none;overflow:hidden}.hero .beam{position:absolute;width:52vw;height:52vw;min-width:420px;border-radius:50%;opacity:.14;background:radial-gradient(circle,var(--grad-b),transparent 72%)}.hero .beam.b1{top:-28vw;left:-12vw;animation:drift 22s ease-in-out infinite alternate}.hero .beam.b2{top:-20vw;right:-16vw;background:radial-gradient(circle,var(--grad-a),transparent 72%);animation:drift 26s ease-in-out infinite alternate-reverse}.hero .inner{position:relative;max-width:860px;margin:0 auto;padding:0 24px}.hero h1{margin:0 auto 20px;max-width:820px}.hero .sub{font-size:18px;color:var(--ink2);max-width:620px;margin:0 auto 28px}.hero .micro{margin-top:14px;font-size:13px;color:var(--muted);line-height:1.4}.replay,.stage{background:var(--surface);border:1px solid var(--line)}.stage{position:relative;max-width:960px;margin:48px auto 0;border-radius:20px;box-shadow:var(--sh-3);overflow:hidden;text-align:left}.stage .stage-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 20px;border-bottom:1px solid var(--line2);background:var(--panel)}.stage .stage-bar b{font-size:13.5px;font-weight:700;color:var(--ink)}.replay{display:inline-flex;align-items:center;gap:6px;border-radius:8px;padding:6px 12px;font-size:12.5px;font-weight:600;color:var(--ink2);cursor:pointer;transition:color .2s,border-color .2s}.replay:hover{color:var(--accent);border-color:var(--accent)}.rv{opacity:0;transform:translateY(14px);transition:opacity .65s var(--ease),transform .65s var(--ease)}.rv.on{opacity:1;transform:none}html:not(.js) .rv{opacity:1;transform:none}.seg{display:inline-flex;background:var(--panel);border:1px solid var(--line);border-radius:11px;padding:4px;gap:4px}.seg button{position:relative;border:0;background:0 0;padding:9px 20px;border-radius:8px;font-size:14px;font-weight:700;color:var(--ink2);cursor:pointer;transition:color .25s,background .25s;font-family:inherit}.seg button.active{background:var(--surface);color:var(--ink);box-shadow:var(--sh-1)}.seg button .prog{position:absolute;left:12px;right:12px;bottom:4px;height:2px;background:var(--line);border-radius:2px;overflow:hidden;opacity:0;transition:opacity .2s}.seg button.active .prog{opacity:1}.seg button .prog i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--grad-a),var(--grad-b))}[data-toggle].cycling 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var(--line2);margin-top:14px}.readout b{font-size:26px;font-weight:800;letter-spacing:-.02em}.readout span{font-size:14px;color:var(--ink2)}html:not(.js) .bars .bar i{height:var(--h)}.seats{display:flex;gap:14px;align-items:stretch}.seat{position:relative;flex:1;min-width:0;display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:28px;text-decoration:none;color:var(--ink);transition:flex .55s var(--ease),box-shadow .35s var(--ease),border-color .35s,transform .35s var(--ease);box-shadow:var(--sh-1);overflow:hidden}.seats:hover .seat{flex:.85}.seats .seat:hover{flex:1.7;box-shadow:var(--sh-2);border-color:#cdd8e4;transform:translateY(-3px)}.equation,.seat .s-ico{display:flex;justify-content:center}.seat .s-ico{width:44px;height:44px;border-radius:12px;background:linear-gradient(135deg,var(--grad-a),var(--grad-b));align-items:center;margin-bottom:16px;color:#fff;box-shadow:0 6px 16px #15294e2e}.seat h3{margin-bottom:8px}.eq-card 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.btn{width:100%}a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:2.5px solid var(--grad-b);outline-offset:2px;border-radius:6px}.draw path.wire{stroke-dasharray:1;stroke-dashoffset:1;transition:stroke-dashoffset 1.1s var(--ease)}.draw.on path.wire{stroke-dashoffset:0}.draw .node{opacity:0;transform:translateY(6px);transition:opacity .5s var(--ease),transform .5s var(--ease)}.draw.on .node{opacity:1;transform:none}.draw.on path.wire.flow{stroke-dasharray:.05 .05;animation:dashflow 1.1s linear infinite}html:not(.js) .draw path.wire{stroke-dashoffset:0}html:not(.js) .draw .node{opacity:1;transform:none}@media (max-width:960px){.section{padding:56px 0}.final{padding:36px 28px;gap:28px}.calc,.final{grid-template-columns:1fr}.calc .c-in{border-right:0;border-bottom:1px solid var(--line2)}}@media (max-width:860px){.equation,.seats{flex-direction:column}.seats:hover .seat{flex:1}.seat .s-more{opacity:1;max-height:220px}.equation{align-items:stretch}.eq-card{max-width:none}.eq-op{padding:8px 0}#actionbar{display:block}.hero{padding:56px 0 20px}}@media (prefers-reduced-motion:reduce){*,::after,::before{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}.draw .node,.rv{opacity:1;transform:none}.draw path.wire{stroke-dashoffset:0}}.anim-idle .beam,.anim-idle i,.anim-idle span,.anim-idle::after,.anim-idle::before{animation-play-state:paused}