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1.625rem;--sp-1: 4px;--sp-2: 8px;--sp-3: 12px;--sp-4: 16px;--sp-5: 20px;--sp-6: 24px;--sp-8: 32px;--sp-10: 40px;--sh-1: 0 1px 2px rgba(22, 49, 42, .04);--sh-2: 0 2px 4px rgba(22, 49, 42, .04), 0 18px 36px -28px rgba(22, 49, 42, .9);--ring: 0 0 0 3px rgba(14, 90, 67, .12)}*{box-sizing:border-box;margin:0;padding:0}html{font-size:16px}@media(prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}body{font-family:var(--font);background:var(--paper);color:var(--ink);line-height:1.55;-webkit-font-smoothing:antialiased}a{color:var(--green)}.wrap{max-width:var(--wrap);margin:0 auto;padding:28px 16px 64px}.hidden{display:none!important}.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px;padding-bottom:9px;border-bottom:1px solid var(--line)}.topbar a{text-decoration:none}.topbar a:hover{text-decoration:underline}.topbar a:focus-visible{outline:2px solid var(--green);outline-offset:3px;border-radius:4px}.topbar 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4px;font-weight:600;color:var(--ink-soft);cursor:pointer;font-family:inherit;line-height:1.3;min-height:44px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;font-size:var(--fs-base);transition:border-color .16s ease,background .16s ease,box-shadow .16s ease}.seg button:has(small){min-height:52px}.seg button small{display:block;font-size:var(--fs-xs);font-weight:600;color:var(--ink-soft)}.seg button:hover{border-color:var(--green-line);background:var(--card)}.seg button.on{border-color:var(--green);background:var(--card);color:var(--green);font-weight:700;box-shadow:inset 0 0 0 1px var(--green),0 1px 2px #0e5a431f}.seg button.on small{color:var(--ink-soft)}.seg button:focus-visible{outline:2px solid var(--green);outline-offset:1px}.row2{display:grid;grid-template-columns:1fr;gap:var(--sp-3)}.row2>*{min-width:0}@media(min-width:360px){.row2{grid-template-columns:1fr 1fr}}.row2 .amt input{padding-left:12px;padding-right:6px}.row2 .amt .unit{padding:0 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ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:.2em;color:#0e5a4329}.gauge{margin-top:18px}.gauge .bar{height:12px;border-radius:999px;background:var(--track);overflow:hidden;position:relative}.gauge .fill{height:100%;border-radius:999px;background:var(--green);transition:width .5s ease}.gauge .fill.over{background:var(--stamp)}.gauge .lim{position:absolute;top:-3px;bottom:-3px;width:2px;background:var(--ink)}.gauge .cap{display:flex;justify-content:space-between;font-size:.72rem;color:var(--ink-soft);margin-top:5px;font-weight:600}.gates{margin-top:18px;display:grid;gap:8px}.gate{border:1px solid var(--line);border-radius:10px;padding:12px 14px;background:var(--paper)}.gate .gh{display:flex;align-items:center;gap:7px;font-size:.84rem;font-weight:700}.gate .mk{flex:none;width:18px;height:18px;border-radius:50%;color:#fff;background:var(--green);display:flex;align-items:center;justify-content:center;font-size:.66rem;font-weight:800}.gate.no 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var(--ink);outline-offset:2px}.banner{margin-top:12px;border:1px solid var(--green-line);border-radius:10px;background:var(--green-soft);padding:12px 14px;font-size:.79rem;color:var(--ink-body);line-height:1.65;word-break:keep-all}.banner strong{display:block;font-size:.82rem;color:var(--ink);margin-bottom:3px}.banner button{margin-top:8px;font-family:inherit;font-weight:700;font-size:var(--fs-sm);cursor:pointer;color:var(--green);background:var(--card);border:1px solid var(--green-line);border-radius:8px;padding:8px 12px}.banner button:hover{background:var(--card);border-color:var(--green)}.step{margin-top:16px}.step:first-child{margin-top:0}.step-h{display:flex;align-items:baseline;gap:8px;margin-bottom:8px}.step-h .n{font-size:.68rem;font-weight:700;color:var(--green);background:var(--green-soft);border-radius:999px;padding:3px 9px}.step-h .s{font-size:.92rem;font-weight:800;letter-spacing:-.01em}.step-h 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li{margin:0}.seo .toc a{font-weight:600;text-decoration:none}.seo .toc a:hover{text-decoration:underline}.seo h2[id]{scroll-margin-top:16px}.seo .callout{position:relative;margin:16px 0;padding:12px 15px 12px 42px;background:var(--warn-bg);border-left:3px solid var(--stamp);border-radius:0 var(--radius) var(--radius) 0;color:var(--ink)}.seo .callout:before{content:"⚠️";position:absolute;left:14px;top:12px;font-size:.95em}.layout-doc .seo{font-size:1rem}.layout-doc .seo .faq summary{font-size:1rem}.layout-doc .seo .faq details p{font-size:.94rem}.site-foot{margin-top:48px;padding-top:20px;border-top:1px solid var(--line);color:var(--ink-soft);line-height:1.7;font-size:var(--fs-sm)}.site-foot nav{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:10px}.site-foot a{font-weight:600;text-decoration:none}.site-foot a:hover{text-decoration:underline}.site-foot nav [aria-current=page]{font-weight:700;color:var(--ink)}a:hover{color:var(--ink)}a:active{color:var(--green)}::selection{background:var(--green-soft)}:is(a,button,summary,input,select,.topbar a,.tabs button,.seg button,.go,.share):focus-visible{outline:2px solid var(--green);outline-offset:2px}.result-ph{display:none}@media(prefers-reduced-motion:reduce){.gauge .fill{transition:none}*,*:before,*:after{transition:none!important;animation:none!important}}@media(min-width:768px){.layout-home{max-width:760px}.layout-doc{max-width:calc(var(--measure) + 32px)}body{background-image:radial-gradient(circle at 1px 1px,rgba(14,90,67,.06) 1px,transparent 0);background-size:22px 22px;background-attachment:fixed}}@media(min-width:1024px){.layout-calc{max-width:1000px}.calc-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,440px);align-items:start;gap:var(--sp-10)}.calc-in>.tabs:first-child{margin-top:0}.calc-out .result{margin-top:0}.calc-grid>.calc-out{grid-column:2;grid-row:1 / 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