:root{--canvas: #fbf8f1;--text: #17342c;--text-body: #47635b;--button: #145c43;--button-text: #ffffff;--footer: #0b3a2a;--input-bg: #f4f8f5;--card-bg: #f4f8f5;--card-bg-white: #ffffff;--border: #e6e1d7;--border-input: rgb(202, 219, 210);--border-card: rgb(220, 230, 224);--accent-orange: #c95e1d;--accent-green: #1e7455;--badge-bg: #e8f3ed;--result-panel: #273444;--warn-bg: #fff7e8;--error: #b3261e;--nav-bg: rgb(251 248 241 / .92);--drawer-bg: #fbf8f1;--scrim: rgb(11 58 42 / .42);--neutral-48: #5f746c;--font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;--r-default: 11px;--r-input: 12px;--r-button: 14px;--r-card: 18px;--r-card-lg: 22px;--r-warn: 10px;--r-pill: 99px;--shadow-1: rgba(18, 63, 48, .07) 0px 8px 30px 0px;--shadow-2: rgba(8, 45, 33, .18) 0px 9px 24px 0px;--shadow-3: rgba(18, 63, 48, .11) 0px 18px 60px 0px;--shadow-4: rgba(20, 92, 67, .18) 0px 8px 20px 0px;--nav-h: 77px;--content-w: 1200px;--article-w: 930px}*,*:before,*:after{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--canvas);color:var(--text);font-family:var(--font);font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}img{max-width:100%;height:auto}a{color:var(--text)}h1,h2,h3,h4{color:var(--text);line-height:1.35;margin:0}p{margin:0 0 1em;color:var(--text-body)}.container{max-width:var(--content-w);margin-inline:auto;padding-inline:24px}.container--article{max-width:var(--article-w)}.skip-link{position:absolute;left:-9999px;top:0;background:var(--button);color:var(--button-text);padding:8px 16px;border-radius:0 0 var(--r-default) 0;z-index:100}.skip-link:focus{left:0}.site-nav{position:sticky;top:0;z-index:50;height:var(--nav-h);border-bottom:1px solid rgba(20,92,67,.1)}.site-nav:before{content:"";position:absolute;inset:0;z-index:-1;background:var(--nav-bg);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px)}.site-nav__inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:100%}.site-nav__brand{font-size:18px;font-weight:900;color:var(--text);text-decoration:none;white-space:nowrap;letter-spacing:-.01em}.site-nav__brand small{display:block;font-size:9px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--neutral-48);line-height:1.2}.site-nav__links{display:flex;align-items:center;gap:28px;list-style:none;margin:0;padding:0}.site-nav__links a{font-size:16px;font-weight:400;color:var(--text);text-decoration:none}.site-nav__links a:hover{color:var(--accent-green)}.nav-toggle,.nav-close{display:none;align-items:center;justify-content:center;width:44px;height:44px;padding:0;border:0;background:none;color:var(--text);cursor:pointer;-webkit-tap-highlight-color:transparent}.burger{position:relative;display:block;width:22px;height:16px}.burger i{position:absolute;left:0;right:0;height:2px;border-radius:2px;background:currentColor;transition:transform .24s ease,opacity .16s ease}.burger i:nth-child(1){top:0}.burger i:nth-child(2){top:7px}.burger i:nth-child(3){top:14px}.is-x .burger i:nth-child(1){transform:translateY(7px) rotate(45deg)}.is-x .burger i:nth-child(2){opacity:0}.is-x .burger i:nth-child(3){transform:translateY(-7px) rotate(-45deg)}.site-nav__panel-head{display:none;align-items:center;justify-content:space-between;gap:12px}.site-nav__panel-title{font-size:13px;font-weight:700;letter-spacing:.1em;color:var(--neutral-48)}.nav-scrim{position:fixed;inset:0;z-index:65;background:var(--scrim);opacity:0;visibility:hidden;transition:opacity .28s ease,visibility .28s ease}.nav-scrim.is-visible{opacity:1;visibility:visible}html.is-nav-locked{overflow:hidden}.site-footer{margin-top:96px;background:var(--footer);color:#ffffffd1;padding:56px 0 28px;font-size:14px}.site-footer__grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:48px;margin-bottom:40px}.site-footer__grid--4{grid-template-columns:2fr 1fr 1fr 1fr}.site-footer__brand{font-size:17px;font-weight:900;color:#fff;margin-bottom:12px}.site-footer__desc{color:#ffffffa8;font-size:13px;line-height:1.9;margin:0}.site-footer__heading{font-size:12px;font-weight:900;letter-spacing:.08em;color:#ffffffa8;margin:0 0 14px}.site-footer ul{list-style:none;margin:0;padding:0}.site-footer li{margin-bottom:10px}.site-footer a{color:#ffffffd1;text-decoration:none}.site-footer a:hover{color:#fff;text-decoration:underline}.site-footer__copy{border-top:1px solid rgba(255,255,255,.12);padding-top:22px;font-size:12px;color:#ffffffa8;margin:0}.hero{padding:72px 0 40px}.hero h1{font-size:clamp(32px,5vw,56px);font-weight:700;letter-spacing:-.02em;line-height:1.25}.hero__lead{margin-top:18px;font-size:17px;line-height:1.9;color:var(--text-body);max-width:820px}.page-hero{padding:48px 0 28px}.page-hero h1{font-size:clamp(28px,4vw,42px);font-weight:700;letter-spacing:-.02em}.page-hero__lead{margin-top:14px;font-size:16px;color:var(--text-body);max-width:820px}.breadcrumb{font-size:12px;color:var(--neutral-48);padding-top:18px}.breadcrumb ol{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:6px}.breadcrumb a{color:var(--neutral-48);text-decoration:none}.breadcrumb a:hover{color:var(--accent-green);text-decoration:underline}.breadcrumb li+li:before{content:"›";margin-right:6px}.section{margin-top:64px}.section__heading{font-size:26px;font-weight:700;letter-spacing:-.01em;margin-bottom:8px}.section__sub{font-size:14px;color:var(--neutral-48);margin-bottom:24px}.card{background:var(--card-bg-white);border:1px solid var(--border-card);border-radius:var(--r-card);box-shadow:var(--shadow-1);padding:25px}.card--flat{background:var(--card-bg);border:1px solid var(--border-card);border-radius:var(--r-card-lg);padding:28px;box-shadow:none}.card--muted{opacity:.62}.card__title{font-size:17px;font-weight:700;margin-bottom:6px}.card__title a{text-decoration:none}.card__title a:hover{color:var(--accent-green)}.card__desc{font-size:13px;color:var(--text-body);margin:0;line-height:1.75}.grid{display:grid;gap:18px}.grid--2{grid-template-columns:repeat(2,1fr)}.grid--3{grid-template-columns:repeat(3,1fr)}.grid--4{grid-template-columns:repeat(auto-fill,minmax(250px,1fr))}.badge{display:inline-block;background:var(--badge-bg);color:var(--accent-green);padding:4px 9px;border-radius:var(--r-pill);font-size:10px;font-weight:900;line-height:1.4;vertical-align:middle}.badge--orange{background:#fdf0e6;color:var(--accent-orange)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;background:var(--button);color:var(--button-text);border:none;border-radius:var(--r-button);padding:16px 20px;font-family:var(--font);font-size:16px;font-weight:900;text-decoration:none;cursor:pointer;box-shadow:var(--shadow-4)}.btn:hover{filter:brightness(1.06)}.btn--small{padding:10px 16px;font-size:14px;border-radius:var(--r-default)}.text-link{font-size:13px;font-weight:800;color:var(--accent-green);text-decoration:none}.text-link:hover{text-decoration:underline}.link-muted{font-size:13px;font-weight:800;color:var(--neutral-48);opacity:.7}.notice{background:var(--warn-bg);border-radius:var(--r-warn);padding:13px 15px;font-size:13px;color:var(--text);line-height:1.8}.prose{font-size:16px;line-height:1.9}.prose h2{font-size:22px;margin:40px 0 14px;padding-left:14px;border-left:4px solid var(--accent-green)}.prose h3{font-size:18px;margin:28px 0 10px}.prose p{color:var(--text)}.prose ul{padding-left:1.4em;color:var(--text)}.prose li{margin-bottom:6px}.prose a{color:var(--accent-green)}.article-body ol{padding-left:1.4em;list-style:decimal}.article-body li strong{display:block}.article-body li p{margin-top:4px}.article-body__table{width:100%;border-collapse:collapse;margin-top:12px;font-size:.92rem}.article-body__table caption{caption-side:top;text-align:left;font-weight:600;font-size:.88rem;padding-bottom:6px;color:var(--text)}.article-body__table th,.article-body__table td{border-bottom:1px solid var(--border);padding:8px 12px;text-align:left;vertical-align:top}.article-body__table th{color:var(--neutral-48);font-weight:600;font-size:.8rem}.article-meta{font-size:.8rem;color:var(--neutral-48);margin-top:8px}.faq-list{margin-top:16px}.faq-list details{background:var(--card-bg-white);border:1px solid var(--border-card);border-radius:var(--r-default);padding:14px 18px;margin-bottom:10px}.faq-list summary{cursor:pointer;font-weight:600;color:var(--text)}.faq-list details p{margin-top:10px;color:var(--text-body)}.sources-list{margin-top:12px;font-size:.88rem;color:var(--text-body)}.sources-list li{padding:4px 0}.source-grade{display:inline-block;background:var(--badge-bg);border-radius:var(--r-pill);font-size:.72rem;padding:1px 8px;margin-right:6px;color:var(--accent-green);font-weight:600}.empty-state{text-align:center;padding:64px 24px}.empty-state p{font-size:15px;color:var(--neutral-48)}.notfound{text-align:center;padding:96px 24px}.notfound h1{font-size:32px;margin-bottom:14px}.notfound__links{margin-top:32px;display:flex;flex-wrap:wrap;gap:12px;justify-content:center}@media(min-width:901px)and (max-width:1080px){.site-nav__links:has(li:nth-child(5)){gap:16px}.site-nav__links:has(li:nth-child(5)) a{font-size:14px}}@media(max-width:900px){.grid--3{grid-template-columns:repeat(2,1fr)}.site-footer__grid{grid-template-columns:1fr;gap:32px}.site-nav{height:auto;min-height:60px;padding:8px 0}.site-nav__inner{gap:12px}.nav-toggle,.nav-close{display:inline-flex;flex:none}.site-nav__panel{position:fixed;top:0;right:0;z-index:70;width:50vw;min-width:220px;max-width:340px;height:100vh;height:100dvh;padding:12px 20px 32px;background:var(--drawer-bg);border-left:1px solid var(--border);box-shadow:-12px 0 32px #0b3a2a29;overflow-y:auto;overscroll-behavior:contain;transform:translate(100%);visibility:hidden;transition:transform .28s ease,visibility 0s linear .28s}.site-nav__panel.is-open{transform:translate(0);visibility:visible;transition:transform .28s ease,visibility 0s linear 0s}.site-nav__panel-head{display:flex;margin-bottom:6px}.nav-close{margin-right:-11px}.site-nav__links{flex-direction:column;align-items:stretch;gap:0}.site-nav__links li+li a{border-top:1px solid var(--border)}.site-nav__links a{display:block;padding:14px 2px;font-size:16px;font-weight:500}}@media(max-width:640px){.container{padding-inline:18px}.grid--2,.grid--3{grid-template-columns:1fr}.hero{padding:48px 0 28px}.section{margin-top:48px}}