:root{--primary:#1a56db;--primary-hover:#1547b8;--primary-active:#123b99;--primary-soft:#eef3fe;--primary-border:#c7d8fb;--success:#0f7b47;--success-soft:#e9f6ef;--success-border:#bfe3d0;--warning:#b54708;--warning-soft:#fffaeb;--warning-border:#fedf89;--danger:#b42318;--danger-soft:#fef3f2;--danger-border:#fecdca;--ink:#101828;--body:#344054;--muted:#667085;--disabled:#98a2b3;--canvas:#ffffff;--canvas-subtle:#f7f8fa;--canvas-sunken:#f2f4f7;--hairline:#e4e7ec;--hairline-strong:#d0d5dd;--on-primary:#ffffff;--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--radius-full:999px;--shadow-card:0 1px 2px rgba(16,24,40,0.04),0 8px 24px rgba(16,24,40,0.06);--shadow-pop:0 12px 32px rgba(16,24,40,0.12);--font-jp:"Noto Sans JP","Hiragino Sans","Hiragino Kaku Gothic ProN","Yu Gothic","Meiryo",system-ui,sans-serif;--font-num:"Inter","Noto Sans JP",system-ui,sans-serif;--font-mono:"SFMono-Regular","Menlo","Consolas",monospace;--container:1120px;--reading:720px;--tool:800px;--header-h:56px}*,:after,:before{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-padding-top:calc(var(--header-h) + 16px)}body{margin:0;background:var(--canvas);color:var(--body);font-family:var(--font-jp);font-size:16px;font-weight:400;line-height:1.8;letter-spacing:.02em;-webkit-font-smoothing:antialiased}:lang(ja){line-break:strict;word-break:normal;overflow-wrap:anywhere}h1,h2,h3,h4{color:var(--ink);margin:0;text-wrap:balance}h1,h2{font-feature-settings:"palt" 1}h1{font-size:40px;line-height:1.45}h1,h2{font-weight:700;letter-spacing:.01em}h2{font-size:28px;line-height:1.5}h3{font-size:20px;line-height:1.6;letter-spacing:.01em}h3,h4{font-weight:700}h4{font-size:17px;line-height:1.7}p{margin:0}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}ol,ul{margin:0;padding:0}ul{list-style:none}img,svg{max-width:100%}:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px}.skip-link{position:absolute;inset-inline-start:-9999px;top:8px;z-index:100;background:var(--ink);color:#fff;padding:10px 16px;border-radius:var(--radius-sm)}.skip-link:focus{inset-inline-start:16px}.container{max-width:var(--container);margin:0 auto;padding-inline:32px}.reading{max-width:var(--reading);margin-inline:auto}.section{padding-block:96px}.section--subtle{background:var(--canvas-subtle);border-block:1px solid var(--hairline)}.center{text-align:center}.lead{font-size:18px;line-height:1.8}.caption{font-size:13px;line-height:1.7;color:var(--muted)}.num{font-family:var(--font-num);font-feature-settings:"tnum";font-variant-numeric:tabular-nums;letter-spacing:0}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:inherit;font-size:17px;font-weight:700;letter-spacing:.03em;line-height:1;border-radius:var(--radius-md);border:1px solid transparent;cursor:pointer;transition:background-color .15s ease,border-color .15s ease}.btn,.btn:hover{text-decoration:none}.btn--lg{height:56px;padding-inline:32px}.btn--md{height:44px;padding-inline:20px;font-size:16px}.btn--sm{height:40px;padding-inline:12px;font-size:14px;font-weight:400}.btn--full{width:100%}.btn--primary{background:var(--primary);color:var(--on-primary)}.btn--primary:hover{background:var(--primary-hover)}.btn--primary:active{background:var(--primary-active)}.btn--secondary{background:var(--canvas);color:var(--ink);border-color:var(--hairline-strong)}.btn--secondary:hover{background:var(--canvas-subtle)}.btn--ghost{background:transparent;color:var(--body)}.btn--ghost:hover{background:var(--canvas-subtle)}.btn--ghost-danger{background:transparent;color:var(--danger)}.btn--ghost-danger:hover{background:var(--danger-soft)}.btn:disabled{background:var(--canvas-sunken);color:var(--disabled);border-color:transparent;cursor:not-allowed}.site-header{position:sticky;top:0;z-index:20;height:var(--header-h);background:rgba(255,255,255,.92);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:1px solid var(--hairline)}.site-header .container{height:100%;gap:24px}.brand,.site-header .container{display:flex;align-items:center}.brand{gap:10px;color:var(--ink);font-weight:700;letter-spacing:.01em}.brand:hover{text-decoration:none}.brand-mark{width:28px;height:28px;flex:none;border-radius:8px;background:var(--primary);color:#fff;display:grid;place-items:center;font-size:12px;font-weight:700;font-family:var(--font-num)}.site-nav{margin-inline-start:auto;display:flex;gap:4px}.site-nav a{color:var(--body);font-size:14px;padding:8px 12px;border-radius:var(--radius-sm);white-space:nowrap}.site-nav a:hover{text-decoration:none}.site-footer,.site-nav a:hover{background:var(--canvas-subtle)}.site-footer{border-top:1px solid var(--hairline);padding-block:48px 32px;font-size:14px}.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:32px}.footer-grid h2{font-size:13px;font-weight:700;color:var(--ink);margin:0 0 10px;line-height:1.6;letter-spacing:.02em}.footer-grid li{padding-block:4px}.footer-grid a{color:var(--body)}.legal{margin-top:32px;padding-top:20px;border-top:1px solid var(--hairline);font-size:12px;line-height:1.9;color:var(--muted)}.legal p+p{margin-top:4px}.breadcrumb{padding-block:20px 0;font-size:13px;color:var(--muted)}.breadcrumb ol{display:flex;flex-wrap:wrap;gap:8px;list-style:none}.breadcrumb li:after{content:"／";margin-inline-start:8px;color:var(--hairline-strong)}.breadcrumb li:last-child:after{content:""}.article{padding-block:32px 96px}.article h1{margin-bottom:12px}.article .meta{font-size:13px;color:var(--muted);margin-bottom:32px}.article h2{margin-top:56px;margin-bottom:16px;padding-bottom:10px;border-bottom:1px solid var(--hairline)}.article h3{margin-top:32px;margin-bottom:10px}.article .notice+p,.article .table-wrap+p,.article ol+p,.article p+.notice,.article p+.table-wrap,.article p+ol,.article p+p,.article p+ul,.article ul+p{margin-top:16px}.article ol.steps li,.article ul.bullets li{position:relative;padding-inline-start:26px;padding-block:4px}.article ul.bullets li:before{content:"";position:absolute;inset-inline-start:8px;top:15px;width:6px;height:6px;border-radius:50%;background:var(--primary)}.article ol.steps{counter-reset:step;list-style:none}.article ol.steps li{counter-increment:step;padding-inline-start:34px}.article ol.steps li:before{content:counter(step);position:absolute;inset-inline-start:0;top:8px;width:22px;height:22px;border-radius:var(--radius-full);background:var(--primary-soft);color:var(--primary);font-family:var(--font-num);font-size:12px;font-weight:700;display:grid;place-items:center}.article .updated{margin-top:48px;padding-top:16px;border-top:1px solid var(--hairline);font-size:13px;color:var(--muted)}.table-wrap{overflow-x:auto;border:1px solid var(--hairline);border-radius:var(--radius-md)}table.data{border-collapse:collapse;width:100%;font-size:14px;line-height:1.7}table.data td,table.data th{border:1px solid var(--hairline);padding:10px 14px;text-align:start;vertical-align:top;min-width:120px}table.data thead th{background:var(--canvas-sunken);color:var(--ink);font-weight:700}.notice{display:flex;gap:12px;padding:14px 16px;border-radius:var(--radius-md);border:1px solid;font-size:14px;line-height:1.75}.notice__icon{flex:none;margin-top:4px}.notice__title{font-weight:700;display:block;margin-bottom:2px}.notice a{color:inherit;text-decoration:underline;font-weight:700}.notice--info{background:var(--primary-soft);border-color:var(--primary-border);color:var(--primary)}.notice--warning{background:var(--warning-soft);border-color:var(--warning-border);color:var(--warning)}.notice--error{background:var(--danger-soft);border-color:var(--danger-border);color:var(--danger)}.notice--success{background:var(--success-soft);border-color:var(--success-border);color:var(--success)}.faq{margin-top:32px;border-top:1px solid var(--hairline)}.faq details{border-bottom:1px solid var(--hairline)}.faq summary{list-style:none;cursor:pointer;padding:18px 40px 18px 0;position:relative;font-size:16px;font-weight:700;color:var(--ink);line-height:1.7}.faq summary::-webkit-details-marker{display:none}.faq summary:after{content:"";position:absolute;inset-inline-end:8px;top:26px;width:9px;height:9px;border-inline-end:2px solid var(--muted);border-block-end:2px solid var(--muted);transform:rotate(45deg);transition:transform .2s ease}.faq details[open] summary:after{transform:rotate(-135deg);top:30px}.faq .answer{padding:0 0 20px;font-size:15px}@media (prefers-reduced-motion:reduce){*,:after,:before{transition:none!important;animation:none!important;scroll-behavior:auto!important}}@media (max-width:1023px){.container{padding-inline:24px}.section{padding-block:64px}h1{font-size:32px}h2{font-size:24px}}@media (max-width:640px){.container{padding-inline:16px}.section{padding-block:56px}h1{font-size:28px}h2{font-size:22px}h3{font-size:18px}.lead{font-size:16px}.site-nav{display:none}.footer-grid{grid-template-columns:1fr}.article h2{margin-top:40px}}.tool-cta{margin-top:48px;padding:28px;border:1px solid var(--primary-border);background:var(--primary-soft);border-radius:var(--radius-lg);text-align:center}.tool-cta h2{border:0;margin:0 0 8px;padding:0;font-size:20px}.tool-cta p{font-size:15px;margin-bottom:18px}.tool-cta .btn{text-decoration:none}.tool-cta__note{margin-top:12px;font-size:13px;color:var(--muted)}.back-to-tool{display:inline-flex;align-items:center;gap:6px;margin-bottom:20px;font-size:14px;font-weight:700}.post-list{display:grid;gap:16px;margin-top:32px}.post-card{display:block;border:1px solid var(--hairline);border-radius:var(--radius-lg);padding:24px;background:var(--canvas);color:var(--body)}.post-card:hover{border-color:var(--primary);background:var(--primary-soft);text-decoration:none}.post-card h2{font-size:18px;margin:0 0 6px;padding:0;border:0;line-height:1.6}.post-card p{font-size:14px;color:var(--muted)}.post-card__date{display:block;margin-top:10px;font-family:var(--font-num);font-size:12px;color:var(--muted)}.related{margin-top:40px;padding-top:20px;border-top:1px solid var(--hairline)}.related h2{font-size:16px;margin:0 0 10px;padding:0;border:0}.related li{padding-block:5px;font-size:15px}@media (max-width:1023px){.footer-grid{grid-template-columns:1fr 1fr}}