:root{--ink:#17211b;--muted:#607066;--paper:#f6f3eb;--card:#fffdf8;--accent:#176c4b;--accent-dark:#103d2d;--line:#d8ddd6;--soft:#e7f1eb;--max:1120px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--paper);font-family:system-ui,-apple-system,"Segoe UI","Noto Sans JP",sans-serif;line-height:1.8}a{color:var(--accent);text-underline-offset:.18em}img{max-width:100%;height:auto}.skip{position:absolute;left:-9999px}.skip:focus{left:12px;top:12px;z-index:10;background:#fff;padding:8px}.site-header{background:var(--accent-dark);color:#fff}.nav-wrap{max-width:var(--max);margin:auto;min-height:68px;padding:0 20px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{color:#fff;text-decoration:none;font-weight:850;letter-spacing:.08em;font-size:1.15rem}.brand small{display:block;color:#bfd6cb;font-size:.68rem;letter-spacing:.04em;font-weight:500}.nav-toggle{display:none;border:1px solid #87a99a;border-radius:8px;color:#fff;background:transparent;padding:7px 11px;font:inherit}.site-nav{display:flex;gap:20px}.site-nav a{color:#eaf4ef;text-decoration:none;font-size:.92rem}.hero{background:linear-gradient(135deg,#153c2e,#1d7252);color:#fff}.hero-inner{max-width:var(--max);margin:auto;padding:76px 20px 82px}.eyebrow{margin:0 0 10px;color:#bfe0d1;font-weight:700;letter-spacing:.12em}.hero h1{max-width:760px;margin:0;font-size:clamp(2rem,5vw,4.1rem);line-height:1.2;letter-spacing:.02em}.hero p{max-width:680px;margin:22px 0 0;color:#dbeae3;font-size:1.08rem}.container{max-width:var(--max);margin:auto;padding:56px 20px}.section-title{margin:0 0 24px;font-size:clamp(1.5rem,3vw,2.1rem);line-height:1.4}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px;box-shadow:0 8px 22px rgb(30 50 40/.05)}.card h2,.card h3{margin-top:0;line-height:1.45}.card p:last-child{margin-bottom:0}.tag{display:inline-block;margin-bottom:10px;padding:3px 9px;border-radius:999px;background:var(--soft);color:var(--accent);font-size:.78rem;font-weight:700}.read-more{font-weight:700}.notice{margin:24px 0;padding:16px 18px;border-left:4px solid var(--accent);background:var(--soft)}.article{max-width:820px}.article-header{padding-bottom:30px;border-bottom:1px solid var(--line)}.article h1{line-height:1.35;font-size:clamp(2rem,4vw,3rem)}.article h2{margin-top:48px;line-height:1.5}.article h3{margin-top:32px}.meta{color:var(--muted);font-size:.9rem}.checklist{padding-left:0;list-style:none}.checklist li{padding:8px 0 8px 30px;position:relative}.checklist li::before{content:"✓";position:absolute;left:0;color:var(--accent);font-weight:800}.breadcrumbs{margin-bottom:24px;color:var(--muted);font-size:.88rem}.breadcrumbs a{color:inherit}.page-head{background:#e4eee8;border-bottom:1px solid var(--line)}.page-head .container{padding-top:42px;padding-bottom:42px}.page-head h1{margin:0;line-height:1.35}.site-footer{margin-top:56px;background:#102c22;color:#cbdcd4}.footer-grid{max-width:var(--max);margin:auto;padding:42px 20px;display:grid;grid-template-columns:2fr 1fr 1fr;gap:28px}.site-footer h2{color:#fff;font-size:1rem}.site-footer ul{list-style:none;padding:0}.site-footer a{color:#dbeae3}.copyright{border-top:1px solid #345246;padding:16px 20px;text-align:center;font-size:.82rem}.button{display:inline-block;padding:10px 16px;border-radius:8px;background:var(--accent);color:#fff;text-decoration:none;font-weight:700}@media(max-width:760px){.grid,.footer-grid{grid-template-columns:1fr}.nav-toggle{display:block}.site-nav{display:none;position:absolute;top:68px;left:0;right:0;z-index:5;padding:18px 20px;background:#153c2e;flex-direction:column}.site-nav.open{display:flex}.hero-inner{padding-top:52px;padding-bottom:58px}.container{padding-top:40px;padding-bottom:40px}}