:root{--ink:#0e1012;--ink-2:#16191c;--ink-3:#1f2328;--steel:#9aa3ab;--steel-hi:#d9dee2;--washi:#ede8df;--mute:#8a9096;--forge:#e8682a;--forge-hi:#ffb067;--ai:#3b5a86;--line:#2b3036;--r:14px;--serif:"Shippori Mincho B1",serif;--sans:Inter,system-ui,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--ink);color:var(--washi);font:16px/1.7 var(--sans);margin:0;overflow-x:hidden}a{color:inherit}img,video{max-width:100%}.wrap{max-width:1140px;margin:0 auto;padding:0 20px}.skip{z-index:99;background:var(--forge);color:#1a0d05;border-radius:8px;padding:8px 14px;position:absolute;top:8px;left:-999px}.skip:focus{left:8px}.site-head{z-index:20;backdrop-filter:blur(10px);background:linear-gradient(#0e1012e6,#0e101200);position:fixed;inset:0 0 auto}.nav{justify-content:space-between;align-items:center;height:64px;display:flex}.logo{letter-spacing:.18em;align-items:center;gap:10px;font-size:14px;font-weight:700;text-decoration:none;display:flex}.logo b{font-family:var(--serif);letter-spacing:0;color:var(--forge);font-size:24px}.nav ul{color:var(--steel);gap:22px;margin:0;padding:0;font-size:14px;list-style:none;display:flex}.nav ul a{text-decoration:none}.nav ul a:hover,.nav ul a[aria-current]{color:var(--washi)}@media (width<=760px){.nav ul{display:none}}.hero{isolation:isolate;place-items:center start;min-height:min(100vh,900px);padding:0;display:grid;position:relative;overflow:hidden}.hero-bg{z-index:-3;transform:scale(1.06) translateY(calc(var(--sy,0) * .12px));background:#0e1012 url(/img/hero-knife-2400.webp) 18%/cover no-repeat;position:absolute;inset:0}.hero-bg:after{content:"";background:linear-gradient(90deg,#0e1012 0%,#0e1012cc 30%,#0e101233 60%,#0e101200 80%),linear-gradient(#0e101200 70%,#0e1012 100%);position:absolute;inset:0}.hero-vid{object-fit:cover;object-position:50% 55%;z-index:-2;width:136%;max-width:none;height:100%;opacity:var(--hv,1);position:absolute;top:0;left:-2%}.hero-shade{z-index:-2;pointer-events:none;opacity:var(--hv,1);background:linear-gradient(90deg,#0e1012 0%,#0e1012d9 28%,#0e101255 58%,#0e101222 80%),linear-gradient(#0e101200 65%,#0e1012 100%);position:absolute;inset:0}#sparks{z-index:-1;pointer-events:none;position:absolute;inset:0}.hero:after{content:"";z-index:-1;background:radial-gradient(60% 100% at 50% 100%,#e8682a33,#0000 70%);height:40%;position:absolute;inset:auto 0 0}.kanji{opacity:.5;font-family:var(--serif);color:#0000;-webkit-text-stroke:1px #ffffff10;z-index:-1;user-select:none;transform:translateY(calc(var(--sy,0) * .25px));font-size:min(62vw,620px);font-weight:800;line-height:1;position:absolute;right:-4vw}.hero-inner{text-align:left;width:100%;max-width:1140px;margin:0 auto;padding:140px 20px 90px}.hero-tag{letter-spacing:.18em;color:var(--steel);text-transform:uppercase;font-size:12px;position:absolute;bottom:22px;right:24px}.hero-tag b{color:var(--forge-hi);font-weight:500}.ai-note{color:var(--mute);opacity:var(--hv,1);font-size:11px;position:absolute;bottom:22px;left:20px}.scroll-hint{color:var(--mute);letter-spacing:.2em;font-size:12px;position:absolute;bottom:22px;left:50%;translate:-50%}@media (width<=760px){.hero-bg{background-image:url(/img/hero-knife-1200.webp);background-position:72%}.hero-bg:after{background:linear-gradient(#0e101255 0%,#0e1012aa 45%,#0e1012 90%)}.hero{flex-direction:column;justify-content:flex-end;min-height:max(100svh,640px);display:flex}.hero-inner{margin:0;padding:0 20px 36px}h1{font-size:clamp(36px,10vw,48px)}.lead{font-size:16px}.hero-vid{object-position:58% 60%;width:100%;height:48%;left:0;-webkit-mask-image:linear-gradient(#000 70%,#0000);mask-image:linear-gradient(#000 70%,#0000)}.hero-shade{background:linear-gradient(#0e101200 36%,#0e1012 50%)}.ai-note{inset:76px 16px auto auto}.hero-tag,.scroll-hint{display:none}}.eyebrow{letter-spacing:.3em;color:var(--forge-hi);text-transform:uppercase;font-size:12px}h1{font-family:var(--serif);margin:.25em 0 .3em;font-size:clamp(40px,7vw,92px);font-weight:800;line-height:1.05}h1 em{background:linear-gradient(100deg,var(--steel) 20%,#fff 45%,var(--steel) 60%);color:#0000;background-size:250% 100%;-webkit-background-clip:text;background-clip:text;font-style:normal;animation:6s ease-in-out infinite sheen}@keyframes sheen{0%,to{background-position:100% 0}50%{background-position:0 0}}.lead{max-width:640px;color:var(--steel);margin:0;font-size:18px}.cta{flex-wrap:wrap;gap:12px;margin-top:34px;display:inline-flex}.btn{border:1px solid var(--line);border-radius:999px;padding:12px 22px;font-weight:500;text-decoration:none;transition:all .25s}.btn.primary{background:var(--forge);border-color:var(--forge);color:#1a0d05}.btn:hover{transform:translateY(-2px);box-shadow:0 8px 30px #e8682a40}section{padding:110px 0;position:relative}section.alt{background:var(--ink-2)}.sec-head{flex-wrap:wrap;justify-content:space-between;align-items:end;gap:20px;margin-bottom:36px;display:flex}.sec-head h2{font-family:var(--serif);margin:0;font-size:clamp(30px,4vw,48px);line-height:1.15}.sec-head h2 small{font-family:var(--sans);letter-spacing:.25em;color:var(--forge-hi);text-transform:uppercase;margin-bottom:10px;font-size:13px;display:block}.sec-head p{max-width:440px;color:var(--steel);margin:0}.panel{background:linear-gradient(180deg,var(--ink-2),var(--ink));border:1px solid var(--line);border-radius:var(--r)}.hamon{width:100%;height:60px;display:block}.hamon path{stroke:#ffffff18;fill:none;stroke-width:1.2px;stroke-dasharray:1400;stroke-dashoffset:1400px;transition:stroke-dashoffset 2.4s}.hamon.on path{stroke-dashoffset:0}.prov{letter-spacing:.08em;color:var(--forge-hi);border:1px dashed var(--forge);vertical-align:middle;border-radius:6px;margin-left:8px;padding:1px 7px;font-size:11px;display:inline-block}.finder{grid-template-columns:260px 1fr;gap:0;display:grid;overflow:hidden}.tabs{border-right:1px solid var(--line);padding:10px}.tabs button{all:unset;box-sizing:border-box;cursor:pointer;width:100%;color:var(--steel);border-radius:10px;justify-content:space-between;padding:12px 14px;font-size:15px;display:flex}.tabs button span{font-family:var(--serif);color:var(--mute)}.tabs button[aria-selected=true]{background:var(--ink-3);color:var(--washi)}.tabs button[aria-selected=true] span{color:var(--forge-hi)}.tabs button:focus-visible{outline:2px solid var(--forge)}.stage{padding:26px 30px}.blade-svg{width:100%;height:auto;display:block}.blade-path{transition:d .7s cubic-bezier(.7,0,.2,1)}.specs{grid-template-columns:repeat(4,1fr);gap:12px;margin:18px 0 0;display:grid}.spec{border:1px solid var(--line);border-radius:10px;padding:12px}.spec dt{color:var(--mute);letter-spacing:.08em;font-size:12px}.spec dd{margin:2px 0 0;font-weight:700}.shape-note{color:var(--steel);margin:16px 0 0}@media (width<=820px){.finder{grid-template-columns:1fr}.tabs{border-right:0;border-bottom:1px solid var(--line);display:flex;overflow-x:auto}.tabs button{white-space:nowrap;gap:8px;width:auto}.specs{grid-template-columns:repeat(2,1fr)}}.steel2{grid-template-columns:minmax(0,.9fr) minmax(0,1.3fr);gap:24px;display:grid}.steel-pick{align-content:start;gap:14px;padding:18px 20px;display:grid}.fam-t{letter-spacing:.2em;text-transform:uppercase;color:var(--mute);margin-bottom:6px;font-size:11px}.chips{flex-wrap:wrap;gap:8px;display:flex}.chip{all:unset;cursor:pointer;border:1px solid var(--line);color:var(--steel);border-radius:999px;padding:7px 13px;font-size:13.5px;transition:all .2s}.chip[aria-pressed=true]{background:var(--c);color:#111;border-color:#0000;font-weight:600}.chip.dk[aria-pressed=true]{color:#fff}.chip:focus-visible{outline:2px solid var(--forge)}.steel-bars{gap:18px;padding:18px 22px;display:grid}.metric-h b{font-size:15px}.metric-h span{color:var(--mute);margin-left:4px;font-size:12px}.metric-h p{color:var(--mute);margin:2px 0 8px;font-size:12.5px}.metric-rows{gap:7px;display:grid}.mrow{grid-template-columns:130px minmax(0,1fr) minmax(0,1.1fr);align-items:center;gap:10px;font-size:13px;display:grid}.mname{color:var(--washi);white-space:nowrap;text-overflow:ellipsis;overflow:hidden}.mtrack{background:#ffffff0d;border-radius:5px;height:10px;overflow:hidden}.mtrack i{border-radius:5px;height:100%;transition:width .6s cubic-bezier(.2,.7,.2,1);display:block}.mval{color:var(--steel);font-size:12.5px}.mval.none{color:var(--mute);font-style:italic}.steel-cards2{grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr));gap:14px;margin-top:20px;display:grid}.scard2{border:1px solid var(--line);border-top:4px solid var(--c);background:var(--ink);border-radius:12px;padding:16px 18px}.scard2 h3{margin:0;font-size:18px}.scard2 h3 span{font-family:var(--serif);color:var(--mute);margin-left:6px;font-size:15px;font-weight:600}.scard2 p{color:var(--steel);margin:8px 0 0;font-size:14px}.scard2 .meta{color:var(--mute);margin-top:2px;font-size:12.5px}.scard2 .comp{font-variant-numeric:tabular-nums;flex-wrap:wrap;gap:4px 12px;font-size:12.5px;display:flex}.scard2 .comp b{color:var(--forge-hi);font-weight:600}.scard2 .srcs{color:var(--mute);margin:10px 0 0;padding-left:1.1em;font-size:12.5px}.scard2 .srcs a{color:var(--steel)}.steel-foot{color:var(--mute);max-width:900px;margin:16px 0 0;font-size:12px}@media (width<=900px){.steel2{grid-template-columns:1fr}.mrow{grid-template-columns:96px minmax(0,1fr)}.mval{grid-column:1/-1;margin:-4px 0 4px}}.edge{grid-template-columns:1fr 1fr;align-items:center;gap:24px;display:grid}.edge-viz{padding:24px}.xsec{width:100%;display:block}.ctrl{padding:28px}.ctrl label{color:var(--steel);justify-content:space-between;font-size:14px;display:flex}.ctrl output{font-family:var(--serif);color:var(--washi);font-size:44px}input[type=range]{width:100%;accent-color:var(--forge);margin:10px 0 20px}.seg{border:1px solid var(--line);border-radius:999px;margin-bottom:16px;padding:3px;display:inline-flex}.seg button{all:unset;cursor:pointer;color:var(--steel);border-radius:999px;padding:7px 16px;font-size:14px}.seg button[aria-pressed=true]{background:var(--ink-3);color:var(--washi)}.verdict{border-top:1px solid var(--line);color:var(--steel);padding-top:16px}.verdict b{color:var(--forge-hi)}@media (width<=820px){.edge{grid-template-columns:1fr}}.hands{grid-template-columns:1fr 1fr;gap:40px;display:grid}.hands-visual{place-items:center;height:min(70vh,520px);display:grid;position:sticky;top:90px;overflow:hidden}.hv{opacity:0;place-items:center;transition:all .6s;display:grid;position:absolute;inset:0;transform:scale(.96)}.hv.on{opacity:1;transform:none}.hv .big{font-family:var(--serif);color:var(--ink-3);-webkit-text-stroke:1px var(--line);font-size:min(30vw,260px);line-height:1;position:relative}.hv-vid{object-fit:cover;opacity:.85;width:100%;height:100%;position:absolute;inset:0}.hv .cap{z-index:1;color:var(--steel);font-size:14px;position:absolute;bottom:24px;left:24px;right:24px}.step{opacity:.25;flex-direction:column;justify-content:center;min-height:70vh;transition:all .5s;display:flex}.step.on{opacity:1}.step .no{font-family:var(--serif);color:var(--forge);font-size:20px}.step h3{font-family:var(--serif);margin:6px 0;font-size:34px}.step p{color:var(--steel);max-width:460px}@media (width<=860px){.hands{grid-template-columns:1fr}.hands-visual{height:300px;position:relative;top:0}.step{opacity:1;min-height:auto;padding:30px 0}}.towns{grid-template-columns:1.2fr 1fr;gap:24px;display:grid}.jmap{width:100%;display:block}.town-dot{cursor:pointer}.town-dot circle.pulse{transform-origin:50%;transform-box:fill-box;animation:2.4s ease-out infinite pulse}@keyframes pulse{0%{r:6;opacity:.8}to{r:26;opacity:0}}.town-info{padding:26px}.town-info h3{font-family:var(--serif);margin:0;font-size:32px}.town-info h3 span{color:var(--mute);margin-left:10px;font-size:16px}.town-info p{color:var(--steel)}@media (width<=860px){.towns{grid-template-columns:1fr}}.calc{grid-template-columns:1fr 1fr;gap:24px;padding:28px;display:grid}.field{gap:4px;margin-bottom:14px;display:grid}.field span{color:var(--mute);font-size:13px}.field input{background:var(--ink);border:1px solid var(--line);color:var(--washi);font:inherit;border-radius:10px;padding:11px 12px}.bars{align-content:center;gap:12px;display:grid}.bar{gap:6px;display:grid}.bar .t{color:var(--steel);justify-content:space-between;font-size:14px;display:flex}.bar .t b{color:var(--washi);font-size:20px}.bar i{background:linear-gradient(90deg,var(--ai),#6e8fbf);border-radius:6px;width:0;height:12px;transition:width .6s;display:block}.bar.us i{background:linear-gradient(90deg,var(--forge),var(--forge-hi))}.fine{color:var(--mute);grid-column:1/-1;font-size:12px}@media (width<=760px){.calc{grid-template-columns:1fr}}.crumbs{color:var(--mute);flex-wrap:wrap;gap:8px;padding-top:84px;font-size:13px;display:flex}.crumbs a{color:var(--steel);text-decoration:none}.crumbs a:hover{color:var(--washi)}.crumbs+section{padding-top:24px}.doc{max-width:780px;padding-top:40px}.doc h3{font-family:var(--serif);margin:34px 0 8px;font-size:24px}.doc p,.doc li{color:var(--steel)}.doc ul{gap:8px;padding-left:1.2em;display:grid}.doc a{color:var(--forge-hi)}.form-frame{border:1px solid var(--line);background:#fff;border-radius:14px;width:100%;height:1000px;margin-top:16px}.form-empty{border:1px dashed var(--line);color:var(--mute);border-radius:12px;padding:16px}.doc.wide{max-width:980px}.answer{border-left:4px solid var(--forge);background:var(--ink-2);border-radius:0 12px 12px 0;padding:14px 18px;color:var(--washi)!important}.calc2{grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:24px;margin:22px 0 10px;padding:24px;display:grid}.calc2-out{align-content:start;gap:18px;display:grid}.field select{background:var(--ink);border:1px solid var(--line);color:var(--washi);font:inherit;text-overflow:ellipsis;border-radius:10px;width:100%;min-width:0;max-width:100%;padding:11px 12px}.field,.calc2-in,.ways-in{min-width:0}.breakdown{border-collapse:collapse;font-variant-numeric:tabular-nums;width:100%;font-size:14px}.breakdown th{text-align:left;color:var(--steel);border-bottom:1px solid var(--line);padding:6px 0;font-weight:400}.breakdown td{text-align:right;border-bottom:1px solid var(--line);padding:6px 0}.breakdown tr.sum th,.breakdown tr.sum td{color:var(--washi);border-bottom:0;padding-top:10px;font-size:16px;font-weight:700}.faq{gap:4px;display:grid}.faq dt{color:var(--washi);margin-top:12px;font-weight:700}.faq dd{color:var(--steel);margin:0}.srcs{color:var(--mute);gap:4px;padding-left:1.3em;font-size:14px;display:grid}.srcs a{color:var(--steel)}@media (width<=820px){.calc2{grid-template-columns:1fr}}.table-wrap{border:1px solid var(--line);border-radius:12px;margin:16px 0 0;overflow-x:auto}.steel-table,.comp-table{border-collapse:collapse;font-variant-numeric:tabular-nums;width:100%;font-size:14px}.steel-table th,.steel-table td,.comp-table th,.comp-table td{border-bottom:1px solid var(--line);text-align:left;white-space:nowrap;padding:9px 12px}.steel-table thead th,.comp-table thead th{background:var(--ink-2);color:var(--steel);letter-spacing:.02em;font-size:12.5px;font-weight:600}.steel-table thead th[data-k]{cursor:pointer;user-select:none}.steel-table thead th[data-k]:after{content:" ↕";color:var(--mute)}.steel-table thead th[aria-sort=ascending]:after{content:" ↑";color:var(--forge-hi)}.steel-table thead th[aria-sort=descending]:after{content:" ↓";color:var(--forge-hi)}.steel-table tbody th{color:var(--washi);font-weight:600}.steel-table tbody tr:hover{background:var(--ink-2)}.steel-table tr.me{background:#e8682a14}.steel-table td.other{white-space:normal;min-width:150px;color:var(--steel)}.steel-table tbody tr:last-child>*,.comp-table tbody tr:last-child>*{border-bottom:0}.ja{color:var(--mute);margin-left:4px;font-size:12px}.ja-big{font-family:var(--serif);color:var(--steel);margin-left:8px;font-size:.55em}.aka{color:var(--mute);margin:-6px 0 14px;font-size:14px}.fam-filter{margin:18px 0 0}.fam-filter .chip{--c:var(--forge-hi)}.site-foot{border-top:1px solid var(--line);color:var(--mute);padding:40px 0;font-size:13px}.site-foot nav{flex-wrap:wrap;gap:18px;margin-bottom:10px;display:flex}.reveal{opacity:0;transition:all .8s cubic-bezier(.2,.7,.2,1);transform:translateY(24px)}.reveal.on,.no-js .reveal{opacity:1;transform:none}@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}.reveal{opacity:1;transform:none}.hero-vid,.hero-shade,.ai-note{display:none}}.steel-links{color:var(--steel);margin:14px 0 0;font-size:13.5px;line-height:1.9}.steel-links a{color:var(--forge-hi)}.cmp-table td{white-space:normal;min-width:110px}.cmp-table tbody th{color:var(--steel);font-weight:500}.choose-table td{white-space:normal}.overlay{margin:20px 0;padding:20px}.overlay svg{width:100%;height:auto;margin-top:12px;display:block}.overlay .ov{transition:opacity .3s,fill-opacity .3s}.overlay figcaption{color:var(--mute);margin-top:8px;font-size:12.5px}.overlay .chip{--c:var(--forge-hi)}.ways{grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);gap:24px;margin:18px 0 8px;padding:24px;display:grid}.ways-in{align-content:start;gap:12px;display:grid}.ways-out{align-content:start;gap:10px;display:grid}.way{border:1px solid var(--line);background:var(--ink);border-radius:12px;grid-template-columns:1fr auto;gap:2px 12px;padding:14px 16px;transition:all .25s;display:grid}.way b{color:var(--washi)}.way span{font:700 26px/1 var(--serif);color:var(--steel);grid-row:span 2;align-self:center}.way small{color:var(--mute);font-size:12.5px}.way.best{border-color:var(--forge);box-shadow:0 0 0 1px var(--forge) inset}.way.best span{color:var(--forge-hi)}.ways .fine{grid-column:1/-1}.check{list-style:none;padding-left:0!important}.check li:before{content:"☐ ";color:var(--forge-hi)}@media (width<=820px){.ways{grid-template-columns:1fr}}.jmap .land{fill:#262c33;stroke:#5a646e;stroke-width:.8px;stroke-linejoin:round}.jmap .inset rect{fill:#0e1012;stroke:#2b3036}.jmap .inset path{fill:#3a424a;stroke:none}.jmap .inset .frame{fill:none;stroke:#e8682a;stroke-width:1.2px}.jmap .inset text{fill:#8a9096;letter-spacing:.15em;font-size:9px}.jmap .sea{fill:#3a4148;letter-spacing:.08em;font-size:11px;font-style:italic}.jmap .credit{fill:#4a535c;font-size:8px}.timeline{margin:28px 0;list-style:none;position:relative;padding:0!important;display:block!important}.timeline:before{content:"";background:linear-gradient(var(--forge),var(--line) 70%);width:2px;position:absolute;top:6px;bottom:6px;left:150px}.tl{grid-template-columns:150px 1fr;gap:0 28px;padding:0 0 26px;display:grid;position:relative}.tl:before{content:"";background:var(--ink);border:2px solid var(--forge);border-radius:50%;width:14px;height:14px;position:absolute;top:8px;left:144px}.tl-when{text-align:right;padding-right:22px}.tl-when b{font-family:var(--serif);color:var(--washi);font-size:20px;line-height:1.2;display:block}.tl-when span{letter-spacing:.12em;text-transform:uppercase;color:var(--forge-hi);font-size:12px}.tl-body h3{font-size:19px;margin:0 0 4px!important}.tl-body p{color:var(--steel);margin:0}.tl-body sup a,.doc sup a{color:var(--mute);font-size:11px;text-decoration:none}.hist-chart{gap:10px;margin:16px 0;padding:20px 22px;display:grid}.hist-chart figcaption{color:var(--mute);margin-bottom:4px;font-size:13px}.hbar{grid-template-columns:190px 1fr 40px;align-items:center;gap:12px;font-size:14px;display:grid}.hbar span{color:var(--steel)}.hbar i{background:linear-gradient(90deg,var(--forge),var(--forge-hi));height:12px;width:var(--w);border-radius:6px;transition:width 1s}.hbar b{color:var(--washi);font-variant-numeric:tabular-nums;text-align:right}@media (width<=640px){.timeline:before{left:8px}.tl{grid-template-columns:1fr;padding-left:30px}.tl:before{left:2px}.tl-when{text-align:left;padding:0 0 4px}.hbar{grid-template-columns:120px 1fr 32px;font-size:12.5px}}.town-info a{color:var(--forge-hi)}