:root{color-scheme:light;--bg:#f6f7f9;--surface:#fff;--surface-2:#eef0f4;--text:#1e2530;--text-muted:#4f5763;--text-faint:#656d79;--primary:#3e4a72;--primary-strong:#2d3557;--primary-soft:#e7e9f2;--accent:#2f6f8a;--border:#e2e5ea;--border-strong:#cfd4dd;--danger:#9a3b2f;--ok:#2f7a5b;--cat-sosaihi-bg:#e4f0ee;--cat-sosaihi-fg:#0a544b;--cat-fuka-bg:#efe7d8;--cat-fuka-fg:#7a5a1f;--cat-other-bg:#e9eaf1;--cat-other-fg:#3e4a72;--font-sans:"Hiragino Kaku Gothic ProN", "Hiragino Sans", "Noto Sans JP", "Yu Gothic", "Meiryo", system-ui, -apple-system, "Segoe UI", sans-serif;--font-serif:"Hiragino Mincho ProN", "Yu Mincho", "Noto Serif JP", serif;--sp-1:4px;--sp-2:8px;--sp-3:12px;--sp-4:16px;--sp-5:24px;--sp-6:32px;--sp-7:48px;--sp-8:64px;--radius:10px;--radius-lg:16px;--shadow:0 1px 2px #141e210d, 0 4px 16px #141e210f;--shadow-sm:0 1px 2px #141e210f;--shadow-lg:0 6px 16px #141e2112, 0 22px 48px #141e211f;--content:760px;--wide:1080px;--ease:cubic-bezier(.2, .7, .2, 1);--ring:0 0 0 3px color-mix(in srgb, var(--primary) 32%, transparent);--grad-primary:linear-gradient(135deg, var(--primary), color-mix(in srgb, var(--primary) 62%, var(--accent)));--grad-tint:color-mix(in srgb, var(--primary) 8%, transparent)}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;overflow-x:clip}@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}body{background:var(--bg);background-image:radial-gradient(60rem 32rem at 88% -8%, var(--grad-tint), transparent 60%), radial-gradient(52rem 30rem at 6% 0%, color-mix(in srgb, var(--accent) 6%, transparent), transparent 55%);color:var(--text);font-family:var(--font-sans);font-feature-settings:"palt";text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;flex-direction:column;min-height:100vh;margin:0;font-size:17px;line-height:1.85;display:flex;overflow-x:clip}img{max-width:100%;height:auto}a{color:var(--primary);text-underline-offset:2px;transition:color .15s var(--ease)}a:hover{color:var(--primary-strong)}button,summary,[role=button],label[for]{cursor:pointer}:focus-visible{box-shadow:var(--ring);border-radius:6px;outline:none}::selection{background:color-mix(in srgb, var(--primary) 22%, transparent)}:target,[id]{scroll-margin-top:5rem}h1,h2,h3,h4{color:var(--text);text-wrap:balance;font-weight:700;line-height:1.4}h1{letter-spacing:.01em;margin:0 0 var(--sp-4);font-size:clamp(1.55rem,1.2rem + 1.6vw,2.15rem)}h2{margin:var(--sp-7) 0 var(--sp-3);padding-bottom:var(--sp-2);font-size:clamp(1.25rem,1.1rem + .7vw,1.55rem);position:relative}h2:after{content:"";background:linear-gradient(90deg, var(--primary) 0, var(--primary-soft) 42%, transparent 100%);border-radius:3px;width:100%;height:3px;display:block;position:absolute;bottom:0;left:0}h3{margin:var(--sp-5) 0 var(--sp-2);font-size:1.15rem}p{margin:0 0 var(--sp-4)}strong{font-weight:700}small{color:var(--text-muted);font-size:.82em}.container{width:100%;max-width:var(--content);padding-inline:var(--sp-4);margin-inline:auto}.container.wide{max-width:var(--wide)}main{padding-block:var(--sp-6) var(--sp-8);flex:1 0 auto}.lead{color:var(--text-muted);text-wrap:pretty;font-size:1.08rem}.site-header{z-index:20;background:color-mix(in srgb, var(--surface) 82%, transparent);-webkit-backdrop-filter:saturate(1.4)blur(10px);border-bottom:1px solid var(--border);position:sticky;top:0}.site-header__inner{max-width:var(--wide);padding:var(--sp-3) var(--sp-4);justify-content:space-between;align-items:center;gap:var(--sp-4);margin-inline:auto;display:flex}.brand{color:var(--text);letter-spacing:.02em;align-items:center;gap:.55ch;font-size:1.2rem;font-weight:800;text-decoration:none;display:inline-flex}.brand:before{content:"";background:var(--grad-primary);width:.62em;height:.62em;box-shadow:0 1px 4px color-mix(in srgb, var(--primary) 45%, transparent);border-radius:4px;flex:none}.brand__tag{color:var(--text-faint);font-size:.72rem;font-weight:600}.site-nav{gap:var(--sp-4);flex-wrap:wrap;display:flex}.site-nav a{color:var(--text-muted);padding:2px 0;font-size:.92rem;font-weight:600;text-decoration:none;position:relative}.site-nav a:after{content:"";background:var(--primary);height:2px;transition:right .2s var(--ease);border-radius:2px;position:absolute;bottom:-2px;left:0;right:100%}.site-nav a:hover:after{right:0}.site-footer{margin-top:var(--sp-8);background:var(--surface-2);border-top:1px solid var(--border);flex-shrink:0;position:relative}.site-footer:before{content:"";background:linear-gradient(90deg, var(--primary), color-mix(in srgb, var(--primary) 55%, var(--accent)), transparent);height:3px;position:absolute;top:-1px;left:0;right:0}.site-footer__inner{max-width:var(--wide);padding:var(--sp-6) var(--sp-4);gap:var(--sp-4);color:var(--text-muted);margin-inline:auto;font-size:.88rem;display:grid}.site-footer a{color:var(--text-muted)}.site-footer__links{gap:var(--sp-2) var(--sp-5);flex-wrap:wrap;display:flex}.crumbs{color:var(--text-muted);margin-bottom:var(--sp-4);font-size:.85rem}.crumbs a{text-decoration:none}.crumbs a:hover{text-decoration:underline}.crumbs span[aria-current]{color:var(--text)}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:var(--sp-5);box-shadow:var(--shadow-sm);transition:transform .22s var(--ease), box-shadow .22s var(--ease), border-color .22s var(--ease)}.grid{gap:var(--sp-4);display:grid}@media (width>=640px){.grid.cols-2{grid-template-columns:1fr 1fr}.grid.cols-3{grid-template-columns:repeat(3,1fr)}}a.card:active,a.guide-card:active,.cluster-feature:active{transform:translateY(-1px)}.benefit-cat{margin:var(--sp-5) 0}.benefit-cat__head{align-items:center;gap:var(--sp-3);margin-bottom:var(--sp-3);display:flex}.benefit{background:var(--surface);border:1px solid var(--border);border-left:4px solid var(--primary);border-radius:var(--radius);padding:var(--sp-4) var(--sp-5);margin-bottom:var(--sp-3);box-shadow:var(--shadow-sm);transition:box-shadow .2s var(--ease), transform .2s var(--ease)}.benefit:hover{box-shadow:var(--shadow);transform:translate(2px)}.benefit--indep{border-left-color:var(--accent)}.benefit__name{margin:0 0 var(--sp-1);font-size:1.05rem;font-weight:700}.benefit__amount{color:var(--primary-strong);background:linear-gradient(180deg, transparent 62%, var(--primary-soft) 62%);padding:0 .15em;font-size:1.3rem;font-weight:800}.benefit dl{gap:var(--sp-1) var(--sp-4);margin:var(--sp-3) 0 0;grid-template-columns:max-content 1fr;font-size:.93rem;display:grid}.benefit dt{color:var(--text-faint);font-weight:600}.benefit dd{margin:0}.badge{letter-spacing:.02em;border:1px solid #0000;border-radius:999px;padding:3px 10px;font-size:.74rem;font-weight:700;display:inline-block}.badge--sosaihi{background:var(--cat-sosaihi-bg);color:var(--cat-sosaihi-fg);border-color:color-mix(in 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#0000;border-radius:999px;align-items:center;gap:.5ch;padding:12px 24px;font-size:1rem;font-weight:700;text-decoration:none;display:inline-flex}.btn--primary{background:var(--grad-primary);color:#fff;box-shadow:0 4px 14px color-mix(in srgb, var(--primary) 34%, transparent)}.btn--primary:hover{color:#fff;box-shadow:0 8px 22px color-mix(in srgb, var(--primary) 42%, transparent);transform:translateY(-2px)}.btn--primary:active{transform:translateY(0)}.btn--ghost{background:var(--surface);color:var(--primary);border-color:var(--border-strong)}.btn--ghost:hover{border-color:var(--primary);box-shadow:var(--shadow);transform:translateY(-2px)}.cta{background:linear-gradient(160deg, var(--primary-soft), var(--surface));border:1px solid color-mix(in srgb, var(--primary) 24%, var(--border));border-radius:var(--radius-lg);padding:var(--sp-5);margin:var(--sp-6) 0;position:relative;overflow:hidden}.cta:before{content:"";background:radial-gradient(circle, color-mix(in srgb, var(--primary) 20%, transparent), transparent 70%);pointer-events:none;border-radius:50%;width:12rem;height:12rem;position:absolute;top:-3rem;right:-3rem}.cta h3{margin-top:0}.cta>*{position:relative}.table-wrap{border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm);overflow-x:auto}table.data{border-collapse:collapse;background:var(--surface);width:100%;min-width:560px;font-size:.92rem}table.data th,table.data td{text-align:left;border-bottom:1px solid var(--border);vertical-align:top;padding:11px 14px}table.data thead th{background:var(--surface-2);color:var(--text-muted);white-space:nowrap;font-size:.82rem;position:sticky;top:0}table.data tbody tr{transition:background .15s var(--ease)}table.data tbody tr:nth-child(2n){background:color-mix(in srgb, var(--surface-2) 45%, transparent)}table.data tbody tr:hover{background:var(--primary-soft)}table.data tbody tr:last-child td{border-bottom:0}.faq{margin:var(--sp-4) 0}.faq details{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);margin-bottom:var(--sp-2);transition:border-color .2s var(--ease), box-shadow .2s var(--ease)}.faq details[open]{box-shadow:var(--shadow-sm);border-color:color-mix(in srgb, var(--primary) 30%, var(--border))}.faq summary{cursor:pointer;padding:var(--sp-4) var(--sp-5);font-weight:700;list-style:none;position:relative}.faq summary::-webkit-details-marker{display:none}.faq summary:after{content:"＋";right:var(--sp-5);color:var(--primary);transition:transform .2s var(--ease);font-weight:700;position:absolute}.faq details[open] summary:after{content:"－"}.faq details>div{padding:0 var(--sp-5) var(--sp-4);color:var(--text-muted)}.sources{color:var(--text-muted);font-size:.85rem}.sources h2{font-size:1.05rem}.sources li{margin-bottom:var(--sp-1);overflow-wrap:anywhere}.hero{padding:var(--sp-7) 0 var(--sp-6);position:relative}.hero:before{content:"";z-index:-1;pointer-events:none;background:radial-gradient(28rem 18rem at 82% 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16px;font-weight:700;text-decoration:none;position:fixed}.muted{color:var(--text-muted)}.mt-0{margin-top:0}.mb-0{margin-bottom:0}.list-plain{margin:0;padding:0;list-style:none}.chip-list{gap:var(--sp-2);margin:var(--sp-3) 0;flex-wrap:wrap;padding:0;list-style:none;display:flex}.chip-list a{background:var(--surface);border:1px solid var(--border);color:var(--text);transition:transform .15s var(--ease), border-color .15s var(--ease), color .15s var(--ease), box-shadow .15s var(--ease);border-radius:999px;padding:6px 14px;font-size:.9rem;font-weight:600;text-decoration:none;display:inline-block}.chip-list a:hover{border-color:var(--primary);color:var(--primary);box-shadow:var(--shadow-sm);transform:translateY(-2px)}.updated{color:var(--text-faint);font-size:.82rem}.prose{font-size:1.05rem}.prose h3{margin-top:var(--sp-5);font-size:1.08rem}.prose p{margin:0 0 var(--sp-4)}.prose ul,.prose ol{margin:0 0 var(--sp-4);padding-left:1.4em}.prose li{margin-bottom:var(--sp-2)}.prose li::marker{color:var(--primary)}.prose strong{color:var(--text)}.prose blockquote{margin:var(--sp-5) 0;padding:var(--sp-4) var(--sp-5) var(--sp-4) var(--sp-6);background:linear-gradient(180deg, var(--primary-soft), color-mix(in srgb, var(--primary-soft) 30%, var(--surface)));border-left:4px solid var(--primary);border-radius:0 var(--radius) var(--radius) 0;color:var(--text);position:relative}.prose table{border-collapse:collapse;width:100%;margin:var(--sp-4) 0;font-size:.92rem;display:block;overflow-x:auto}.prose th,.prose td{border:1px solid var(--border);text-align:left;vertical-align:top;padding:9px 12px}.prose thead th{background:var(--surface-2);white-space:nowrap}.prose a{overflow-wrap:anywhere}.guide-card{color:inherit;text-decoration:none;display:block}.guide-card h3{margin:0 0 var(--sp-2);color:var(--primary-strong)}.guide-card p{color:var(--text-muted);margin:0;font-size:.95rem}@media (prefers-reduced-motion:no-preference){@keyframes jh-rise{0%{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}.hero>*,main>.container>section,main>.container>.grid{animation:jh-rise .5s var(--ease) both}main>.container>section:nth-child(2){animation-delay:50ms}main>.container>section:nth-child(3){animation-delay:.1s}main>.container>section:nth-child(4){animation-delay:.15s}}:root{--font-mono:ui-monospace, SFMono-Regular, "SF Mono", Consolas, "Liberation Mono", Menlo, monospace;--radius:4px;--radius-lg:6px}.site-header{background:#12151be6;border-bottom-color:#232a32}.brand{color:#eef2f6}.brand__mark{color:#7fd4e8}.brand__tag{color:#8b97a3}.site-nav a{color:#b0bac4}.site-nav a:hover{color:#fff}.site-nav a:after{background:#7fd4e8}.brand:before{background:#12151b;box-shadow:inset 0 0 0 1.5px #7fd4e8,inset 0 0 0 3px #12151b,inset 0 0 0 4px #7fd4e866}body{background-image:radial-gradient(60rem 32rem at 88% -8%, var(--grad-tint), transparent 60%), linear-gradient(color-mix(in srgb, var(--primary) 5%, transparent) 1px, transparent 1px), linear-gradient(90deg, color-mix(in srgb, var(--primary) 5%, transparent) 1px, transparent 1px);background-position:0 0,0 0,0 0;background-size:auto,28px 28px,28px 28px}.brand__tag,.badge,.chip-list a,table.data thead th,.updated,.benefit__amount,code{font-family:var(--font-mono)}.brand__tag{text-transform:uppercase;letter-spacing:.14em;font-size:.66rem}.badge,.chip-list a{letter-spacing:.02em;border-radius:3px}h2:after{background:linear-gradient(90deg, var(--primary), color-mix(in srgb, var(--primary) 50%, var(--accent)));border-radius:999px;width:2.75rem;height:3px}main h2:before,.prose h2:before{content:"»";color:var(--primary);font-family:var(--font-mono);opacity:.75;margin-right:.5ch;font-weight:400}.brand:before{background:var(--surface);box-shadow:inset 0 0 0 1.5px var(--primary), inset 0 0 0 3px var(--surface), inset 0 0 0 4px color-mix(in srgb, var(--primary) 35%, 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var(--border);border-radius:999px;align-items:center;gap:.5ch;padding:5px 13px;font-size:.82rem;display:inline-flex}.guide-updated:before{content:"";background:var(--ok);border-radius:50%;flex:none;width:.5em;height:.5em}.guide-updated__note{margin-left:.1em}.prose>h1:first-child{margin-bottom:var(--sp-4);padding-bottom:var(--sp-4);border-bottom:1px solid var(--border);font-size:clamp(1.7rem,1.3rem + 1.9vw,2.35rem);line-height:1.4}.prose>h1:first-child:before{content:"";width:2.6rem;height:4px;margin-bottom:var(--sp-3);background:var(--grad-primary);border-radius:2px;display:block}.prose>h1:first-child+p{color:var(--text-muted);font-size:1.12rem;line-height:1.9}.prose h2{margin-top:var(--sp-8)}.prose h3{border-left:3px solid color-mix(in srgb, var(--primary) 55%, var(--border));padding-left:.7em}.callout{box-shadow:var(--shadow-sm);padding:var(--sp-4) var(--sp-5);position:relative}.callout--info{background:linear-gradient(180deg, color-mix(in srgb, var(--primary) 11%, var(--surface)), color-mix(in srgb, var(--primary) 4%, var(--surface)));border:1px solid color-mix(in srgb, var(--primary) 30%, var(--border));border-left:5px solid var(--primary)}.callout--info>strong:first-child{color:var(--primary-strong)}.callout--warn{background:linear-gradient(180deg, color-mix(in srgb, var(--danger) 9%, var(--surface)), var(--surface));border:1px solid color-mix(in srgb, var(--danger) 32%, var(--border));border-left:5px solid var(--danger)}.callout--warn>strong:first-child{color:var(--danger)}.prose blockquote{margin:var(--sp-5) 0;padding:var(--sp-4) var(--sp-5) var(--sp-4) calc(var(--sp-6) + .55rem);background:linear-gradient(180deg, color-mix(in srgb, var(--primary) 7%, var(--surface)), var(--surface));border:1px solid color-mix(in srgb, var(--primary) 20%, var(--border));border-left:4px solid var(--primary);border-radius:var(--radius);box-shadow:var(--shadow-sm);color:var(--text);position:relative}.prose 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