:root{--ink:#f7f5ef;--muted:#adb4c5;--paper:#080910;--panel:#141622;--line:#303347;--cyan:#58f2d5;--pink:#ff537f;--yellow:#ffd166}*{box-sizing:border-box}body{margin:0;color:var(--ink);background:radial-gradient(circle at 82% 0,#342151 0,transparent 34rem),radial-gradient(circle at 4% 72%,#123e4d 0,transparent 30rem),var(--paper);font-family:Inter,"Noto Sans JP","Hiragino Kaku Gothic ProN",Meiryo,sans-serif;line-height:1.85}.shell{width:min(900px,calc(100% - 34px));margin:auto}header{min-height:74px;display:flex;align-items:center;justify-content:space-between;gap:18px;border-bottom:1px solid #ffffff14}.brand{color:var(--ink);font-size:18px;font-weight:950;text-decoration:none}.back{color:var(--cyan);font-size:12px;font-weight:850;text-decoration:none}main{padding:58px 0 82px}.eyebrow{margin:0 0 10px;color:var(--cyan);font-size:11px;font-weight:900;letter-spacing:.18em}h1{margin:0;font-size:clamp(36px,7vw,62px);line-height:1.08;letter-spacing:-.055em}.lead{max-width:720px;margin:18px 0 30px;color:var(--muted)}.guide-nav{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 30px}.guide-nav a{padding:8px 12px;border:1px solid var(--line);border-radius:999px;color:#dfe3ec;font-size:11px;font-weight:850;text-decoration:none}.guide-nav a[aria-current="page"]{border-color:var(--cyan);background:#58f2d518;color:var(--cyan)}.card{margin-top:15px;padding:25px 27px;border:1px solid var(--line);border-radius:20px;background:#141622e8;box-shadow:0 20px 60px #0005}.card h2{margin:0 0 10px;font-size:21px}.card h3{margin:22px 0 7px;color:var(--cyan);font-size:15px}.card p,.card li{color:#c3c8d3}.card ul,.card ol{padding-left:1.35em}.steps{display:grid;gap:12px;margin:18px 0 0;padding:0;counter-reset:step;list-style:none}.steps li{position:relative;padding:16px 17px 16px 55px;border:1px solid #ffffff16;border-radius:14px;background:#0e1019}.steps li:before{position:absolute;left:16px;top:15px;display:grid;place-items:center;width:28px;height:28px;border-radius:50%;background:linear-gradient(145deg,var(--pink),#ff8b62);color:#fff;font-size:12px;font-weight:950;counter-increment:step;content:counter(step)}.feature-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:13px;margin-top:17px}.feature{padding:19px;border:1px solid #ffffff16;border-radius:15px;background:#0e1019}.feature b{display:block;margin-bottom:6px;color:var(--cyan)}.feature p{margin:0;font-size:13px}.note{padding:17px 19px;border-left:4px solid var(--yellow);border-radius:0 13px 13px 0;background:#ffd16612;color:#e8dfc2}.faq{display:grid;gap:10px}.faq details{padding:0 18px;border:1px solid #ffffff16;border-radius:14px;background:#0e1019}.faq summary{padding:15px 0;font-weight:850;cursor:pointer}.faq p{margin:0;padding:0 0 16px}.actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}.button{display:inline-flex;padding:11px 16px;border-radius:10px;background:var(--cyan);color:#07110f;font-size:12px;font-weight:950;text-decoration:none}.button.secondary{border:1px solid var(--line);background:transparent;color:var(--ink)}footer{display:flex;flex-wrap:wrap;justify-content:space-between;gap:14px;padding:25px 0 36px;border-top:1px solid #ffffff14;color:#777d8c;font-size:11px}footer nav{display:flex;flex-wrap:wrap;gap:14px}footer a{color:#aeb4c4;text-decoration:none}@media(max-width:650px){main{padding-top:40px}.feature-grid{grid-template-columns:1fr}.card{padding:21px 19px}}