:root{--ink:#172b3b;--muted:#526575;--line:#dfe7ec;--bg:#f8fafb;--primary:#155e75;--primary-dark:#104b60;--soft:#e8f4f6}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#fff;color:var(--ink);font:16px/1.75 system-ui,-apple-system,'Apple SD Gothic Neo','Malgun Gothic',sans-serif;word-break:keep-all}a{color:var(--primary)}a:focus-visible,summary:focus-visible{outline:3px solid #f59e0b;outline-offset:3px}.container{width:min(100% - 40px,1020px);margin:0 auto}.skip{position:absolute;left:-9999px;top:0;background:white;padding:10px}.skip:focus{left:12px;z-index:99}.topbar{border-bottom:1px solid var(--line);background:white}.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:70px}.brand{text-decoration:none;font-size:20px;font-weight:800;color:var(--ink)}.brand span{font-size:13px;color:var(--muted);font-weight:500;margin-left:8px}.topbar nav{display:flex;gap:22px}.topbar nav a{font-size:14px;text-decoration:none;color:var(--muted)}.notice{margin:26px 0 0;padding:14px 18px;border:1px solid #cbe1e8;background:#f3f9fb;border-radius:10px;font-size:14px}.notice strong{color:#0f4c5c}.hero{padding:65px 0 74px;border-bottom:1px solid var(--line)}.eyebrow,.section-kicker{font-size:13px;font-weight:800;letter-spacing:.06em;color:var(--primary)}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(32px,5.3vw,54px);line-height:1.3;letter-spacing:-.045em;margin:16px 0 24px}h1 em{font-style:normal;color:var(--primary)}.hero>p{max-width:760px;color:var(--muted);font-size:18px}.actions{display:flex;gap:12px;flex-wrap:wrap;margin:30px 0 18px}.btn{display:inline-flex;justify-content:center;align-items:center;gap:10px;min-height:48px;padding:12px 22px;border-radius:10px;font-weight:700;text-decoration:none;transition:background .15s}.primary{background:var(--primary);color:#fff}.primary:hover{background:var(--primary-dark);color:#fff}.secondary{border:1px solid #cbd7df;color:var(--ink);background:white}.secondary:hover{background:var(--bg)}.hero .small{font-size:13px;color:var(--muted)}.section{padding:64px 0;border-bottom:1px solid var(--line)}.section h2{font-size:clamp(25px,3vw,33px);line-height:1.4;letter-spacing:-.03em;margin:12px 0 20px}.section .intro{max-width:830px;color:var(--muted)}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:30px}.card{padding:26px;border:1px solid var(--line);border-radius:14px;background:#fff}.card-icon{font-size:13px;font-weight:800;color:var(--primary);margin-bottom:13px}.card h3,.step h3{font-size:19px;margin:0 0 8px}.card p,.step p{color:var(--muted);font-size:15px;margin:0}.split{display:grid;grid-template-columns:1.4fr .75fr;gap:35px;align-items:center}.split p{color:var(--muted)}.side-note{background:var(--soft);padding:25px;border-radius:14px}.side-note strong{font-size:18px}.side-note p{font-size:15px;color:var(--muted);margin:12px 0}.side-note a{font-weight:700}.steps{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:27px 0}.step{display:flex;gap:17px;padding:22px;border-radius:12px;background:var(--bg)}.step span{width:35px;height:35px;flex:none;display:grid;place-items:center;background:var(--primary);color:#fff;border-radius:100%;font-weight:800}.footnote{font-size:13px;color:var(--muted)}.app-section{display:flex;align-items:center;gap:25px;justify-content:space-between}.app-section>div:first-child{max-width:650px}.app-section p{color:var(--muted)}.app-links{display:flex;flex-direction:column;gap:10px;min-width:190px}.faqs{border-top:1px solid var(--line)}.faqs details{border-bottom:1px solid var(--line);padding:20px 3px}.faqs summary{font-weight:700;cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:12px}.faqs summary::-webkit-details-marker{display:none}.faqs summary:after{content:'+';font-size:24px;line-height:1;color:var(--primary)}.faqs details[open] summary:after{content:'−'}.faqs details p{color:var(--muted);font-size:15px;margin:14px 0 0}.final-cta{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:38px 0 65px}.final-cta h2{font-size:25px;margin:0 0 5px}.final-cta p{color:var(--muted);margin:0}.footer{background:#f3f6f8;border-top:1px solid var(--line);padding:30px 0;color:var(--muted);font-size:13px}.footer p{margin:4px 0}@media(max-width:720px){.container{width:min(100% - 30px,1020px)}.topbar-inner{min-height:62px}.brand{font-size:18px}.brand span{display:none}.topbar nav{gap:10px}.topbar nav a{font-size:12px}.hero{padding:42px 0 48px}.hero>p{font-size:16px}.section{padding:44px 0}.cards,.steps,.split{grid-template-columns:1fr}.card{padding:22px}.app-section,.final-cta{align-items:stretch;flex-direction:column}.app-links{min-width:0}.actions .btn,.app-links .btn,.final-cta .btn{width:100%}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.btn{transition:none}}

.header-label{font-size:16px;font-weight:750;color:var(--ink);letter-spacing:-.02em}
@media(max-width:720px){.header-label{font-size:13px}.topbar nav{gap:9px}}

/* V3 detailed guides */
.detail-section p{line-height:1.85}.fact-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:24px 0}.fact{border:1px solid #dce5e9;border-radius:14px;padding:20px;display:flex;flex-direction:column;gap:9px}.fact b{font-size:14px;color:#35566a}.fact strong{font-size:19px;color:#155e75}.fact small{color:#586b79;line-height:1.55}.detail-steps{counter-reset:guide;list-style:none;margin:22px 0;padding:0;display:grid;gap:12px}.detail-steps li{position:relative;padding:17px 18px 17px 54px;border:1px solid #dce5e9;border-radius:12px;line-height:1.75}.detail-steps li:before{counter-increment:guide;content:counter(guide);position:absolute;left:16px;top:16px;width:25px;height:25px;border-radius:50%;background:#155e75;color:white;text-align:center;font-weight:700;line-height:25px}.detail-section .footnote a{overflow-wrap:anywhere}@media(max-width:700px){.fact-grid{grid-template-columns:1fr}.detail-steps li{padding-right:14px}}