:root{color-scheme:light;--ink:#20273a;--muted:#626573;--paper:#f7f3ea;--gold:#d6b978;--line:#d9d1c3;--serif:"Yu Mincho","Hiragino Mincho ProN",serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:28px}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.9 -apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN",sans-serif}a{color:inherit;text-underline-offset:5px}a:focus-visible,summary:focus-visible{outline:3px solid #bc7139;outline-offset:5px}.skip{position:absolute;left:12px;top:-90px;z-index:5;padding:8px 16px;background:white}.skip:focus{top:12px}.site-header{display:flex;align-items:center;justify-content:space-between;gap:20px;max-width:1200px;margin:auto;padding:20px 32px}.brand{font:700 24px/1.4 var(--serif);letter-spacing:.12em;text-decoration:none}.brand span{display:block;font-size:11px;letter-spacing:.28em;margin-top:4px}.site-header nav{display:flex;align-items:center;gap:28px;font-size:14px}.site-header nav a{text-decoration:none}.nav-play{border:1px solid var(--line);padding:8px 20px}.hero{background:#171c2c;color:#f7f0de}.hero-art{max-width:1200px;margin:auto}.hero-art img{display:block;width:100%;height:auto}.hero-copy{max-width:900px;margin:auto;text-align:center;padding:36px 24px 58px}.eyebrow{font-size:12px;font-weight:700;letter-spacing:.2em;color:#74613c;margin:0 0 16px}.hero .eyebrow,.closing .eyebrow{color:var(--gold)}h1,h2,h3,.catch{font-family:var(--serif)}h1{font-size:clamp(30px,4vw,46px);letter-spacing:.1em;line-height:1.4;margin:0 0 18px}h1 span{display:block;font-size:.45em;margin-top:8px}.catch{font-size:clamp(22px,3vw,30px);margin:14px 0}.button{display:inline-flex;align-items:center;justify-content:center;gap:28px;padding:15px 32px;margin:18px 0 8px;background:var(--gold);color:#192033;text-decoration:none;font-weight:700;border:1px solid #e6cf9e}.button:hover{background:#e5ca91}.small{font-size:12px;color:var(--muted)}.hero .small,.closing .small{color:#c2bdaf}.section{max-width:1120px;margin:auto;padding:76px 32px;border-bottom:1px solid var(--line);scroll-margin-top:12px}h2{font-size:clamp(25px,3vw,34px);line-height:1.6;letter-spacing:.035em;margin:0 0 28px}h3{font-size:21px;line-height:1.5;margin:10px 0 18px}.story{display:grid;grid-template-columns:1fr 1fr;gap:70px}.story-text p:first-child{margin-top:0}.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}.steps article{border-top:2px solid #8b7753;padding-top:20px}.steps p{font-size:15px}.number{font-family:var(--serif);font-size:32px;color:#9b835c}.aside{border-left:3px solid #a38550;margin-top:38px;padding:18px 26px;background:#ede7da}.aside .eyebrow{font-size:11px}.aside h3{margin:8px 0}.aside p{margin-bottom:0}.intro{max-width:700px;margin-bottom:32px}.characters{display:grid;grid-template-columns:repeat(3,1fr);gap:0 32px}.characters article{padding:24px 0;border-top:1px solid var(--line)}.characters p{font-size:12px;color:#74613c;margin:0}.characters h3{font-size:26px;letter-spacing:.12em;margin:8px 0 12px}.characters span{font-size:14px}.faq{max-width:900px;border-bottom:0}.faq details{border-top:1px solid var(--line);padding:20px 0}.faq details:last-child{border-bottom:1px solid var(--line)}.faq summary{cursor:pointer;font-weight:600}.faq details p{margin:14px 0 0;color:var(--muted);font-size:15px}.closing{padding:65px 24px;text-align:center;background:#171c2c;color:#f7f0de}.closing h2{font-size:clamp(23px,3vw,32px);margin-bottom:12px}footer{max-width:1200px;margin:auto;padding:40px 32px;display:flex;align-items:center;gap:32px;justify-content:space-between}footer nav{display:flex;flex-wrap:wrap;gap:8px 20px;font-size:12px;max-width:650px}footer .brand{flex-shrink:0}
@media(max-width:700px){.site-header{padding:16px 20px;gap:12px}.brand{font-size:20px}.site-header nav{gap:12px;font-size:12px}.site-header nav>a:not(.nav-play){display:none}.nav-play{padding:7px 16px}.hero-copy{padding:28px 20px 40px}.hero-copy>p:not(.eyebrow):not(.catch):not(.small){font-size:14px}.button{padding:14px 20px;gap:16px;font-size:14px}.section{padding:48px 24px}.story{grid-template-columns:1fr;gap:8px}.steps{grid-template-columns:1fr;gap:24px}.steps article{padding-top:14px}.steps h3{margin:4px 0 12px}.steps p{margin:0}.characters{grid-template-columns:repeat(2,1fr);gap:0 20px}.characters h3{font-size:23px}.characters span{font-size:13px}.aside{padding:18px;margin-top:32px}.aside h3{font-size:19px}.aside p{font-size:14px}footer{padding:32px 24px;align-items:flex-start;flex-direction:column;gap:16px}.closing{padding:48px 24px}.closing h2{max-width:15em;margin:0 auto 14px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

.guide-title{max-width:1000px;margin:0 auto;padding:48px 32px 24px}.guide-title h1{font-size:clamp(28px,5vw,44px)}.guide-index{max-width:1000px;margin:0 auto;padding:12px 32px 32px;display:flex;gap:12px 24px;flex-wrap:wrap}.guide-page .section{max-width:1000px}.guide-page .section>p{max-width:48em}.guide-page h3{margin-top:28px}.guide-page .steps h3{margin-top:14px}
@media(max-width:600px){.guide-title{padding:32px 20px 12px}.guide-index{padding:12px 20px 24px;font-size:14px}.site-header nav{flex-wrap:wrap;gap:12px}}

/* 公式配布バナーは縦横比を保ち、小さな画面でもはみ出させない。 */
.portal-link{margin:20px 0 6px;padding:16px 0;border-top:1px solid var(--line);text-align:center}
.portal-link a{display:inline-flex;flex-direction:column;align-items:center;gap:6px;max-width:100%;color:inherit;text-decoration:none}
.portal-link a:focus-visible{outline:2px solid currentColor;outline-offset:4px}
.portal-link img{display:block;width:200px;max-width:100%;height:auto}
.portal-link span{font-size:11px;line-height:1.6}