:root{--brand:#e0651c;--brand-strong:#b8500f;--brand-link:#a8460e;--brand-soft:#fdf3ea;--brand-soft-2:#fbead9;--brand-border:#f0dac4;--ink:#1c2230;--ink-soft:#4a5260;--ink-faint:#6a7280;--bg:#fbf7f2;--surface:#fff;--surface-2:#fff9f3;--line:#ece3d8;--footer-bg:#171b24;--footer-text:#e7e2db;--footer-link:#f0cbae;--footer-muted:#aeb4bf;--footer-line:#2b3140;--radius:16px;--radius-sm:10px;--radius-lg:24px;--shadow-sm:0 1px 2px rgba(28,34,48,.06),0 2px 8px rgba(28,34,48,.05);--shadow:0 6px 18px rgba(28,34,48,.08),0 2px 6px rgba(28,34,48,.05);--shadow-lg:0 20px 45px rgba(184,80,15,.12),0 6px 16px rgba(28,34,48,.07);--maxw:1140px;--gothic:"Hiragino Kaku Gothic ProN","Hiragino Sans","BIZ UDPGothic","Yu Gothic Medium","YuGothic","Meiryo",sans-serif;--mincho:"Hiragino Mincho ProN","BIZ UDPMincho","Yu Mincho","YuMincho",serif}*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}html{font-size:100%;-webkit-text-size-adjust:100%;scroll-behavior:smooth}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none !important;transition:none !important}}body{font-family:var(--gothic);font-size:1.0625rem;line-height:1.85;color:var(--ink);background:var(--bg);background-image:radial-gradient(circle at 18% -10%,rgba(224,101,28,.06),transparent 42%),radial-gradient(circle at 100% 0,rgba(251,177,122,.10),transparent 38%);background-attachment:fixed;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;letter-spacing:.01em;overflow-wrap:break-word;word-break:normal;line-break:strict}img,svg,video{max-width:100%;height:auto;display:block}h1,h2,h3,h4{font-family:var(--mincho);font-weight:700;line-height:1.4;color:var(--ink);letter-spacing:.02em}h1{font-size:clamp(1.9rem,1.2rem+3vw,3rem);line-height:1.3}h2{font-size:clamp(1.5rem,1.05rem+1.9vw,2.15rem)}h3{font-size:clamp(1.2rem,1rem+.8vw,1.5rem)}h4{font-size:1.125rem}p{margin:0 0 1.1em}a{color:var(--brand-link);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1.5px;transition:color .15s ease}a:hover{color:var(--brand-strong)}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--brand);outline-offset:2px;border-radius:4px}.skip-link{position:absolute;left:-9999px;top:0;z-index:200;background:var(--ink);color:#fff;padding:.7rem 1.1rem;border-radius:0 0 8px 0;text-decoration:none}.skip-link:focus{left:0}.wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:clamp(1.1rem,3vw,2rem)}.section{padding-block:clamp(2.8rem,1.5rem+5vw,5rem)}main{display:block}.site-header{position:sticky;top:0;z-index:100;background:rgba(255,249,243,.88);-webkit-backdrop-filter:saturate(140%) blur(10px);backdrop-filter:saturate(140%) blur(10px);border-bottom:1px solid var(--line)}.header-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:74px}.brand{display:inline-flex;align-items:center;gap:.6rem;text-decoration:none;color:var(--ink)}.brand:hover{color:var(--ink)}.brand img{width:42px;height:42px}.brand-text{display:flex;flex-direction:column;line-height:1.05}.brand-name{font-family:var(--mincho);font-weight:700;font-size:1.32rem;letter-spacing:.02em;color:var(--ink)}.brand-tag{font-size:.66rem;letter-spacing:.22em;font-weight:700;color:var(--brand-strong);text-transform:uppercase}.nav{display:flex;align-items:center;gap:.3rem}.nav a{color:var(--ink-soft);text-decoration:none;font-size:.97rem;font-weight:600;padding:.55rem .7rem;border-radius:8px;display:inline-flex;align-items:center;min-height:44px}.nav a:hover{color:var(--brand-strong);background:var(--brand-soft)}.nav a[aria-current="page"]{color:var(--brand-strong);box-shadow:inset 0 -2px 0 var(--brand)}body.is-home .nav a.n-home,body.is-about .nav a.n-about,body.is-contact .nav a.n-contact{color:var(--brand-strong);box-shadow:inset 0 -2px 0 var(--brand)}.nav-toggle{display:none;align-items:center;justify-content:center;width:46px;height:46px;border:1px solid var(--line);background:var(--surface);border-radius:10px;cursor:pointer;color:var(--ink)}.nav-toggle svg{width:24px;height:24px}@media(max-width:860px){.nav-toggle{display:inline-flex}.nav{position:absolute;inset:74px 0 auto 0;flex-direction:column;align-items:stretch;gap:.15rem;background:var(--surface);border-bottom:1px solid var(--line);padding:.6rem clamp(1.1rem,3vw,2rem) 1rem;box-shadow:var(--shadow);max-height:0;overflow:hidden;visibility:hidden;transition:max-height .25s ease}.nav a{padding:.85rem .6rem;border-radius:10px}#nav-switch:checked ~ .nav{max-height:520px;visibility:visible}#nav-switch:checked ~ .nav-toggle .ico-open{display:none}}.nav-switch{position:absolute;opacity:0;pointer-events:none}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;min-height:48px;padding:.8rem 1.5rem;border-radius:12px;font-weight:700;font-size:1rem;text-decoration:none;cursor:pointer;border:2px solid transparent;transition:transform .15s ease,box-shadow .15s ease,background-color .15s ease;font-family:var(--gothic)}.btn-primary{background:var(--brand-strong);color:#fff;box-shadow:0 8px 18px rgba(184,80,15,.22)}.btn-primary:hover{background:#a2470d;color:#fff;transform:translateY(-1px);box-shadow:0 12px 24px rgba(184,80,15,.28)}.btn-ghost{background:transparent;color:var(--brand-strong);border-color:var(--brand-border)}.btn-ghost:hover{background:var(--brand-soft);color:var(--brand-strong)}.btn svg{width:18px;height:18px}.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(1.5rem,4vw,3.5rem);align-items:center;padding-block:clamp(2.6rem,1.5rem+5vw,4.8rem)}.eyebrow{display:inline-flex;align-items:center;gap:.5rem;font-size:.78rem;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--brand-strong);background:var(--brand-soft);border:1px solid var(--brand-border);padding:.4rem .85rem;border-radius:999px;margin-bottom:1.1rem}.eyebrow::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--brand)}.hero h1{margin-bottom:.9rem}.hero-lead{font-size:1.12rem;color:var(--ink-soft);max-width:34em;margin-bottom:1.8rem}.hero-cta{display:flex;flex-wrap:wrap;gap:.85rem}.hero-media{position:relative;justify-self:center}.hero-media img{width:100%;max-width:520px}@media(max-width:820px){.hero-grid{grid-template-columns:1fr;text-align:left}.hero-media{order:-1;max-width:420px}}.section-head{max-width:42rem;margin-bottom:2.2rem}.section-head .eyebrow{margin-bottom:.9rem}.section-head p{color:var(--ink-soft);margin:0}.lead{font-size:1.12rem;color:var(--ink-soft)}.center{text-align:center;margin-inline:auto}.value-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:1.1rem}.value-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:1.6rem;box-shadow:var(--shadow-sm);transition:transform .18s ease,box-shadow .18s ease}.value-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}.value-ico{width:50px;height:50px;border-radius:13px;background:var(--brand-soft);display:flex;align-items:center;justify-content:center;margin-bottom:1rem;color:var(--brand-strong)}.value-ico svg{width:26px;height:26px}.value-card h3{font-size:1.18rem;margin-bottom:.5rem}.value-card p{color:var(--ink-soft);font-size:.99rem;margin:0}.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.4rem}.article-card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);transition:transform .18s ease,box-shadow .18s ease}.article-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}.article-card .thumb{aspect-ratio:16/10;background:linear-gradient(135deg,var(--brand-soft),var(--brand-soft-2));display:flex;align-items:center;justify-content:center;border-bottom:1px solid var(--line)}.article-card .thumb svg{width:64%;height:auto}.article-card .body{display:flex;flex-direction:column;flex:1;padding:1.4rem 1.4rem 1.5rem}.article-card .cat{font-size:.74rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--brand-strong);margin-bottom:.55rem}.article-card h3{font-size:1.22rem;line-height:1.45;margin-bottom:.6rem}.article-card h3 a{color:var(--ink);text-decoration:none}.article-card h3 a:hover{color:var(--brand-strong);text-decoration:underline;text-underline-offset:3px}.article-card .excerpt{color:var(--ink-soft);font-size:.97rem;margin-bottom:1rem;flex:1}.article-card .meta{display:flex;align-items:center;justify-content:space-between;gap:.6rem;font-size:.83rem;color:var(--ink-faint);border-top:1px solid var(--line);padding-top:.85rem}.band{background:linear-gradient(135deg,#fff4ea,#fcebd9);border-block:1px solid var(--brand-border)}.about-split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(1.5rem,4vw,3rem);align-items:center}.about-split .media{display:flex;justify-content:center}.about-split .media img{width:100%;max-width:380px}@media(max-width:780px){.about-split{grid-template-columns:1fr}.about-split .media{order:-1;max-width:300px;margin-inline:auto}}.stat-row{display:flex;flex-wrap:wrap;gap:1.8rem;margin-top:1.4rem}.stat .n{font-family:var(--mincho);font-size:1.9rem;font-weight:700;color:var(--brand-strong);line-height:1}.stat .l{font-size:.86rem;color:var(--ink-soft)}.breadcrumb{font-size:.86rem;color:var(--ink-faint);padding-block:1rem .2rem}.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:.4rem;align-items:center}.breadcrumb li{display:flex;align-items:center;gap:.4rem}.breadcrumb li+li::before{content:"›";color:var(--ink-faint)}.breadcrumb a{color:var(--ink-soft);text-decoration:none}.breadcrumb a:hover{color:var(--brand-strong);text-decoration:underline}.breadcrumb [aria-current]{color:var(--ink)}.article{max-width:760px;margin-inline:auto}.article-header{margin-bottom:1.6rem}.article-header .cat{font-size:.78rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--brand-strong)}.article-header h1{margin:.55rem 0 .9rem}.byline{display:flex;flex-wrap:wrap;align-items:center;gap:.7rem 1rem;font-size:.9rem;color:var(--ink-faint);border-block:1px solid var(--line);padding-block:.9rem}.byline .author{display:inline-flex;align-items:center;gap:.5rem;color:var(--ink-soft);font-weight:600}.byline .author img{width:30px;height:30px;border-radius:50%}.article-hero{margin:1.6rem 0;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);background:linear-gradient(135deg,var(--brand-soft),var(--brand-soft-2))}.article-hero svg{width:100%;height:auto;display:block}.prose{font-size:1.07rem}.prose h2{margin:2.3rem 0 .9rem;padding-top:.4rem;scroll-margin-top:90px}.prose h3{margin:1.7rem 0 .7rem}.prose p{margin:0 0 1.15em}.prose ul,.prose ol{margin:0 0 1.3em;padding-left:1.4rem}.prose li{margin-bottom:.5em}.prose strong{color:var(--ink);font-weight:700}.prose a{font-weight:600}.tldr{background:var(--surface);border:1px solid var(--brand-border);border-left:4px solid var(--brand);border-radius:var(--radius-sm);padding:1.2rem 1.3rem;margin:1.4rem 0}.tldr p{margin:0;color:var(--ink-soft)}.tldr .label{display:inline-block;font-size:.72rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--brand-strong);margin-bottom:.4rem}.toc{background:var(--surface-2);border:1px solid var(--line);border-radius:var(--radius-sm);padding:1.2rem 1.4rem;margin:1.6rem 0}.toc .label{font-family:var(--mincho);font-weight:700;font-size:1.02rem;margin-bottom:.6rem}.toc ol{margin:0;padding-left:1.3rem}.toc li{margin-bottom:.35em}.toc a{color:var(--ink-soft);text-decoration:none}.toc a:hover{color:var(--brand-strong);text-decoration:underline}.table-wrap{overflow-x:auto;margin:1.4rem 0;border:1px solid var(--line);border-radius:var(--radius-sm)}table{border-collapse:collapse;width:100%;font-size:.97rem;background:var(--surface)}caption{caption-side:top;text-align:left;font-size:.85rem;color:var(--ink-faint);padding:.6rem .9rem}th,td{padding:.8rem .95rem;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}thead th{background:var(--brand-soft);color:var(--ink);font-weight:700;border-bottom:2px solid var(--brand-border)}tbody tr:last-child td{border-bottom:0}tbody tr:nth-child(even){background:var(--surface-2)}.callout{display:flex;gap:.85rem;background:var(--surface);border:1px solid var(--brand-border);border-radius:var(--radius-sm);padding:1.1rem 1.2rem;margin:1.4rem 0}.callout .ci{flex:none;width:26px;height:26px;color:var(--brand-strong)}.callout p{margin:0;font-size:.99rem;color:var(--ink-soft)}.callout strong{color:var(--ink)}.steps{counter-reset:step;list-style:none;padding:0;margin:1.4rem 0}.steps>li{position:relative;padding:0 0 1.3rem 3.1rem;margin:0}.steps>li::before{counter-increment:step;content:counter(step);position:absolute;left:0;top:0;width:2.1rem;height:2.1rem;border-radius:50%;background:var(--brand-strong);color:#fff;font-family:var(--mincho);font-weight:700;display:flex;align-items:center;justify-content:center;font-size:1rem}.steps>li:not(:last-child)::after{content:"";position:absolute;left:1.05rem;top:2.4rem;bottom:.2rem;width:2px;background:var(--brand-border)}.steps h3{margin:.1rem 0 .4rem;font-size:1.12rem}.steps p{margin:0;color:var(--ink-soft);font-size:1rem}.faq{margin:1.6rem 0;display:flex;flex-direction:column;gap:.7rem}.faq details{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);overflow:hidden}.faq summary{cursor:pointer;list-style:none;padding:1.05rem 1.2rem;font-weight:700;font-family:var(--mincho);color:var(--ink);display:flex;justify-content:space-between;align-items:center;gap:1rem;min-height:48px}.faq summary::-webkit-details-marker{display:none}.faq summary::after{content:"";flex:none;width:12px;height:12px;border-right:2px solid var(--brand-strong);border-bottom:2px solid var(--brand-strong);transform:rotate(45deg);transition:transform .2s ease;margin-top:-4px}.faq details[open] summary::after{transform:rotate(225deg);margin-top:2px}.faq .ans{padding:0 1.2rem 1.15rem;color:var(--ink-soft)}.faq .ans p{margin:0}.note-box{background:#fffbf6;border:1px solid var(--brand-border);border-radius:var(--radius);padding:1.3rem 1.4rem;margin:2rem 0}.note-box .label{font-family:var(--mincho);font-weight:700;color:var(--ink);font-size:1.04rem;margin-bottom:.5rem;display:flex;align-items:center;gap:.5rem}.note-box .label svg{width:20px;height:20px;color:var(--brand-strong)}.note-box p{margin:0 0 .6em;font-size:.96rem;color:var(--ink-soft)}.note-box p:last-child{margin-bottom:0}.author-box{display:flex;gap:1.1rem;align-items:flex-start;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:1.4rem;margin:2.4rem 0 0}.author-box img{flex:none;width:64px;height:64px;border-radius:50%;border:2px solid var(--brand-border)}.author-box .name{font-family:var(--mincho);font-weight:700;font-size:1.08rem}.author-box .role{font-size:.85rem;color:var(--brand-strong);font-weight:600;margin-bottom:.4rem}.author-box p{font-size:.93rem;color:var(--ink-soft);margin:0}.related{margin-top:2.6rem;border-top:1px solid var(--line);padding-top:1.8rem}.related h2{font-size:1.4rem;margin-bottom:1.1rem}.updated{font-size:.85rem;color:var(--ink-faint);margin-top:1.4rem}.page-hero{background:linear-gradient(135deg,#fff4ea,#fcebd9);border-bottom:1px solid var(--brand-border)}.page-hero .wrap{padding-block:clamp(2rem,1.3rem+3vw,3.4rem)}.page-hero h1{margin:.5rem 0 .6rem}.page-hero p{color:var(--ink-soft);max-width:44em;margin:0}.doc{max-width:800px;margin-inline:auto}.doc h2{margin:2rem 0 .8rem;font-size:1.4rem}.doc h3{margin:1.4rem 0 .6rem;font-size:1.15rem}.doc p,.doc li{color:var(--ink-soft)}.doc ul,.doc ol{margin:0 0 1.2em;padding-left:1.4rem}.doc li{margin-bottom:.45em}.doc .updated{margin-bottom:1.6rem}.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1.2rem;margin-top:1.6rem}.contact-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:1.5rem;box-shadow:var(--shadow-sm)}.contact-card .ic{width:46px;height:46px;border-radius:12px;background:var(--brand-soft);color:var(--brand-strong);display:flex;align-items:center;justify-content:center;margin-bottom:.9rem}.contact-card .ic svg{width:24px;height:24px}.contact-card h3{font-size:1.1rem;margin-bottom:.4rem}.contact-card p{font-size:.96rem;color:var(--ink-soft);margin:0 0 .5rem}.contact-card a{font-weight:600;word-break:break-all}.site-footer{background:var(--footer-bg);color:var(--footer-text);margin-top:0}.footer-top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:2rem;padding-block:clamp(2.4rem,1.5rem+3vw,3.4rem)}.footer-brand .brand-name{color:#fff}.footer-brand .brand-tag{color:var(--footer-link)}.footer-brand p{color:var(--footer-muted);font-size:.92rem;margin:1rem 0 1.2rem;max-width:30ch}.footer-social{display:flex;gap:.6rem}.footer-social a{width:42px;height:42px;border:1px solid var(--footer-line);border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--footer-text);transition:background-color .15s ease,border-color .15s ease}.footer-social a:hover{background:var(--brand-strong);border-color:var(--brand-strong);color:#fff}.footer-social svg{width:19px;height:19px}.footer-col h4{font-family:var(--gothic);font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;color:var(--footer-muted);font-weight:700;margin-bottom:1rem}.footer-col ul{list-style:none}.footer-col li{margin-bottom:.6rem}.footer-col a{color:var(--footer-link);text-decoration:none;font-size:.95rem}.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}.footer-bottom{border-top:1px solid var(--footer-line);padding-block:1.4rem;display:flex;flex-wrap:wrap;justify-content:space-between;gap:.6rem;align-items:center;font-size:.85rem;color:var(--footer-muted)}.footer-bottom nav{display:flex;flex-wrap:wrap;gap:1rem}.footer-bottom a{color:var(--footer-muted);text-decoration:none}.footer-bottom a:hover{color:var(--footer-link);text-decoration:underline}@media(max-width:820px){.footer-top{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}}@media(max-width:480px){.footer-top{grid-template-columns:1fr}}figure{margin:0}.diagram{margin:1.8rem 0;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:1.3rem 1.3rem .6rem}.diagram svg{width:100%;height:auto;display:block}.diagram figcaption{font-size:.85rem;color:var(--ink-faint);text-align:center;padding:.7rem .4rem 0}.home-illu{width:100%;max-width:460px;height:auto}time{color:inherit}.mt-0{margin-top:0}.muted{color:var(--ink-faint)}hr{border:0;border-top:1px solid var(--line);margin:2rem 0}