:root{--bg:#f4f6f8;--panel:#fff;--ink:#17212b;--muted:#5f6b78;--line:#d5dce3;--accent:#176b73;--accent-dark:#11545b;--soft:#eaf4f4;--notice:#fff8df;--notice-line:#e3c55c}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Yu Gothic","Meiryo",system-ui,sans-serif;line-height:1.75}
a{color:var(--accent-dark)}
.wrap{width:min(920px,calc(100% - 32px));margin:0 auto;padding:24px 0 64px}
.topbar{display:flex;justify-content:space-between;gap:16px;align-items:center;margin-bottom:18px;font-size:.9rem;font-weight:700}
.topbar a{text-decoration:none}
.hero{display:grid;grid-template-columns:minmax(0,1fr) 150px;gap:24px;align-items:center;padding:28px 0 30px;border-bottom:1px solid var(--line)}
.eyebrow{margin:0 0 8px;color:var(--accent-dark);font-size:.8rem;font-weight:800}
h1{font-size:clamp(1.55rem,4vw,2.25rem);line-height:1.35;margin:0 0 10px;letter-spacing:0}
.lead{margin:0;color:var(--muted);font-size:.98rem}
.hero img{width:100%;height:auto;display:block}
.actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:8px 16px;border-radius:6px;background:var(--accent);color:#fff;text-decoration:none;font-size:.9rem;font-weight:800}
.btn:hover{background:var(--accent-dark)}
.btn.secondary{background:#fff;color:var(--accent-dark);border:1px solid var(--accent)}
.disclosure{margin:24px 0;padding:12px 15px;border:1px solid var(--notice-line);border-radius:6px;background:var(--notice);font-size:.86rem;color:#665616}
.toc{padding:16px 18px;border:1px solid var(--line);border-radius:6px;background:var(--panel)}
.toc strong{display:block;margin-bottom:5px}.toc ol{margin:0;padding-left:1.4rem}.toc li{margin:2px 0}
section{padding-top:34px}
h2{margin:0 0 8px;padding-left:11px;border-left:4px solid var(--accent);font-size:1.18rem;letter-spacing:0}
h3{margin:0 0 5px;font-size:1rem;letter-spacing:0}
p{margin:0 0 12px}
.muted{color:var(--muted)}
.roadmap{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:16px}
.step,.material{border:1px solid var(--line);border-radius:6px;background:var(--panel);padding:16px}
.step-num{display:inline-flex;width:28px;height:28px;align-items:center;justify-content:center;margin-bottom:9px;border-radius:50%;background:var(--accent);color:#fff;font-size:.82rem;font-weight:800}
.step p,.material p{font-size:.88rem;color:var(--muted)}
.materials{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:16px}
.tag{display:inline-block;margin-bottom:8px;padding:2px 8px;border-radius:4px;background:var(--soft);color:var(--accent-dark);font-size:.74rem;font-weight:800}
.material ul{margin:8px 0 14px;padding-left:1.2rem;font-size:.86rem}.material li{margin:3px 0}
.material .btn{width:100%;margin-top:auto}
.official{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:14px}
.official a{display:block;padding:14px 16px;border:1px solid var(--line);border-radius:6px;background:var(--panel);font-weight:700;text-decoration:none}
.quiz-band{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-top:34px;padding:20px;border:1px solid var(--line);border-radius:6px;background:var(--soft)}
.quiz-band h2{border:0;padding:0}.quiz-band p{margin:4px 0 0;color:var(--muted);font-size:.9rem}
.faq details{padding:13px 0;border-bottom:1px solid var(--line)}.faq summary{font-weight:700;cursor:pointer}.faq details p{margin:8px 0 0;color:var(--muted);font-size:.9rem}
.fineprint{margin-top:34px;padding-top:18px;border-top:1px solid var(--line);color:var(--muted);font-size:.82rem}
footer{display:flex;flex-wrap:wrap;gap:10px 18px;margin-top:28px;font-size:.86rem;font-weight:700}
@media(max-width:700px){.hero{grid-template-columns:minmax(0,1fr) 92px;gap:12px;padding-top:12px}.roadmap,.materials,.official{grid-template-columns:1fr}.quiz-band{align-items:flex-start;flex-direction:column}.quiz-band .btn{width:100%}}
@media(max-width:430px){.wrap{width:min(100% - 24px,920px)}.topbar{align-items:flex-start;flex-direction:column;gap:4px}.hero{grid-template-columns:1fr}.hero img{width:88px}.actions .btn{width:100%}}