:root{--green:#153f35;--ink:#1d352f;--muted:#58675f;--paper:#faf9f4;--gold:#ecd298;--line:#d7ded4}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;background:var(--paper);color:var(--ink);font-family:"Noto Sans JP","Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif;line-height:1.85;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,a,summary{-webkit-tap-highlight-color:transparent}a:focus-visible,summary:focus-visible{outline:3px solid #c38b27;outline-offset:6px}a:hover{opacity:.85}.wrap{width:min(1120px,calc(100% - 80px));margin-inline:auto}.header{height:88px;padding:0 4%;display:flex;align-items:center;justify-content:space-between;background:var(--paper);border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;font-family:Georgia,serif;letter-spacing:1.5px;font-size:17px;font-weight:bold;line-height:1.4}.brand small{display:block;font-family:sans-serif;letter-spacing:2px;font-size:9px;margin-top:3px}.brand-mark{font-size:26px;border:1px solid var(--green);border-radius:50%;width:47px;height:47px;display:grid;place-items:center;letter-spacing:-3px;padding-right:3px}.header nav{display:flex;align-items:center;gap:32px;font-size:13px;font-weight:bold}.nav-cta{background:var(--green);color:white;padding:13px 22px}.nav-cta span{margin-left:22px}.hero{position:relative;isolation:isolate;overflow:hidden;background:#183f35;color:#fff;min-height:740px}.hero-art{position:absolute;inset:0;z-index:-2;background:url('course.svg') right center/cover no-repeat}.hero:after{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(90deg,rgba(10,39,32,.96),rgba(10,39,32,.8) 37%,rgba(10,39,32,.06) 78%)}.hero-inner{padding-block:62px 65px}.eyebrow{font-size:11px;font-weight:700;letter-spacing:2.8px;color:#527568;margin:0 0 22px}.eyebrow.light{color:#e1d5b3}.hero-tag{font-size:13px;letter-spacing:2px;margin:25px 0 15px}h1{font-size:clamp(36px,4.5vw,62px);line-height:1.45;letter-spacing:.06em;font-family:"Yu Mincho","Hiragino Mincho ProN",serif;font-weight:600;margin:0 0 14px}.hero-sub{font-size:19px;letter-spacing:3px;margin:0 0 18px}.hero-copy{font-size:14px;color:#e1e7df}.hero-offer{border-left:2px solid var(--gold);padding-left:19px;margin:26px 0 25px;display:flex;flex-direction:column;align-items:flex-start;line-height:1.5}.hero-offer>span{font-size:12px;letter-spacing:2px}.hero-offer strong{font-weight:500;font-size:25px}.hero-offer b{font-family:Georgia,serif;font-size:72px;line-height:1.2;color:var(--gold);margin:0 8px}.hero-offer small{font-size:12px;color:#e0e4da;margin-top:5px}.button{display:inline-flex;align-items:center;justify-content:space-between;gap:40px;min-height:62px;padding:16px 30px;font-size:15px;font-weight:700;transition:transform .2s,opacity .2s}.button:hover{transform:translateY(-2px)}.gold{background:var(--gold);color:#193c30;min-width:320px}.hero-note{font-size:11px;margin:12px 0 0;color:#e4e6dc}.hero-note span{margin-left:10px}.art-caption{position:absolute;bottom:24px;right:25px;letter-spacing:3px;font-size:9px;color:#f1f2e3}.event-strip{background:#eef0e7;border-bottom:1px solid var(--line)}.strip-inner{display:grid;grid-template-columns:1fr 1fr 1.25fr;padding-block:29px}.strip-inner>div{padding-left:34px;border-left:1px solid #cbd4c7}.strip-inner>div:first-child{border:0;padding-left:0}.strip-inner span{display:block;font-size:10px;letter-spacing:2px;color:var(--muted);margin-bottom:4px}.strip-inner strong{font-size:22px;font-family:Georgia,"Yu Mincho",serif;font-weight:500}.strip-inner small{font-family:sans-serif;font-size:11px;margin-left:12px;white-space:nowrap}.section{padding-block:95px}h2{font-family:"Yu Mincho","Hiragino Mincho ProN",serif;font-size:34px;line-height:1.65;font-weight:600;letter-spacing:.04em;margin:0 0 25px}h2 em{font-style:normal;color:#71866c}.intro{display:grid;grid-template-columns:1fr 1fr;gap:80px}.intro-body{padding-top:30px;font-size:15px}.intro-body p{margin:0 0 22px}.benefits{background:#edf0e7}.benefit-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:36px;margin-top:45px}.benefit-grid article{border-top:1px solid #b9c5b6;padding-top:22px}.number{font-family:Georgia,serif;font-size:46px;font-style:italic;color:#8a9b80}h3{font-size:21px;line-height:1.7;margin:14px 0}.benefit-grid p{font-size:14px;color:#4b5d51}.benefit-label{display:block;font-size:12px;letter-spacing:1px;margin-top:26px;font-weight:bold}.section-head{display:flex;justify-content:space-between;align-items:center;gap:30px}.section-head>p{font-size:14px}.price-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:22px}.price-card{border:1px solid var(--line);background:white;padding:32px}.price-card.member{background:var(--green);color:#fff;border-color:var(--green)}.price-kind{font-size:15px;font-weight:bold}.price{display:flex;align-items:baseline;gap:10px;margin:18px 0}.price strong{font-size:64px;line-height:1.3;letter-spacing:-2px;font-family:Georgia,serif;font-weight:400}.price small,.price span{font-size:13px}.price-bottom{border-top:1px solid #c5cec333;padding-top:15px;display:flex;justify-content:space-between;gap:10px;font-size:12px}.price-bottom b{font-size:18px;margin-left:6px}.footnote{font-size:12px;color:var(--muted);margin-top:18px}.details{background:#eeefe9}.details-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:80px}.details-lead{font-size:14px}.date-block{margin-top:45px;display:flex;flex-direction:column;line-height:1.2}.date-block span{font-size:12px;letter-spacing:4px;color:#71836c}.date-block strong{font-family:Georgia,serif;font-size:85px;font-weight:400;letter-spacing:-4px;margin:8px 0 14px}.info-list{margin:0}.info-list>div{display:grid;grid-template-columns:125px 1fr;border-bottom:1px solid #ced5ca;padding:20px 0;font-size:14px}.info-list>div:first-child{padding-top:0}.info-list dt{font-weight:700}.info-list dd{margin:0}.info-list small{font-size:12px}.text-link{text-decoration:underline;text-underline-offset:4px;font-size:13px}.link-divider{font-size:12px;color:#82907d}.step-grid{list-style:none;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:40px;margin-top:40px}.step-grid li{border-left:2px solid #b8c5ac;padding-left:23px}.step-grid span{font-size:11px;letter-spacing:2px;color:#6a8060}.step-grid h3{font-size:18px}.step-grid p{font-size:14px;color:var(--muted)}.faq{padding-top:10px}.faq-list{border-top:1px solid var(--line);margin-top:35px}details{border-bottom:1px solid var(--line);padding:0 5px}summary{cursor:pointer;list-style:none;font-size:15px;font-weight:700;padding:24px 35px 24px 38px;position:relative}summary::-webkit-details-marker{display:none}summary:before{content:"Q";font-family:Georgia,serif;position:absolute;left:2px;color:#7a8d6f;font-size:23px;top:18px}summary:after{content:"+";position:absolute;right:8px;font-size:22px;font-weight:400;top:18px}details[open] summary:after{content:"−"}details p{font-size:14px;color:var(--muted);margin:0 35px 25px 38px;max-width:850px}.join{background:var(--green);color:#fff;text-align:center;position:relative}.join h2{font-size:42px}.join-inner>p:not(.eyebrow){font-size:14px}.deadline{font-size:16px;margin:28px 0 24px;color:var(--gold)}.deadline strong{font-family:Georgia,serif;font-size:34px}.deadline span{margin-left:20px;border-left:1px solid #7e9278;padding-left:20px;font-size:14px}.join .button{min-width:380px}.join .small{font-size:11px!important;color:#d6dfd4}.line-link{display:inline-block;border-bottom:1px solid #b4c5ad;margin-top:18px;font-size:13px}.trial{padding-block:65px;display:flex;align-items:center;justify-content:space-between;gap:45px}.trial h2{font-size:26px}.trial p:not(.eyebrow){font-size:13px}.trial small{font-size:11px;color:var(--muted)}.outline{border:1px solid var(--green);font-size:13px;flex-shrink:0;gap:20px}footer{border-top:1px solid var(--line);padding:32px 0}.footer-inner{display:flex;align-items:center;justify-content:space-between}.footer-inner>small{font-size:10px;letter-spacing:1px}.mobile-cta{display:none}.skip{position:absolute;top:-90px;left:20px;z-index:100;background:#fff;padding:15px}.skip:focus{top:10px}
@media(min-width:1500px){.hero-art{background-position:center 58%}}
@media(max-width:1000px){.wrap{width:calc(100% - 48px)}.header nav{gap:20px}.strip-inner strong{font-size:18px}.strip-inner small{display:block;margin:3px 0 0}.intro,.details-grid{gap:40px}.benefit-grid{gap:24px}.price-card{padding:25px}.price strong{font-size:54px}.trial{flex-direction:column;align-items:flex-start}.hero:after{background:linear-gradient(90deg,rgba(10,39,32,.95),rgba(10,39,32,.65) 50%,rgba(10,39,32,.12))}.price-bottom{flex-wrap:wrap}.info-list>div{grid-template-columns:105px 1fr}}
@media(max-width:640px){html{scroll-padding-top:20px}.wrap{width:calc(100% - 40px)}.header{height:72px;padding:0 20px}.brand{font-size:13px;gap:9px}.brand-mark{width:38px;height:38px;font-size:23px}.brand small{font-size:8px}.header nav>a:not(.nav-cta){display:none}.header .nav-cta{font-size:11px;padding:10px 12px}.nav-cta span{margin-left:4px}.hero{min-height:0}.hero-inner{padding:40px 0 50px}.hero-art{background-position:65% center;opacity:.65}.hero:after{background:linear-gradient(90deg,rgba(10,39,32,.94),rgba(10,39,32,.55))}.eyebrow{font-size:9px;letter-spacing:1.7px;margin-bottom:17px}.hero-tag{font-size:11px;letter-spacing:1px;margin-top:22px}h1{font-size:38px;letter-spacing:0;line-height:1.5}.hero-sub{font-size:16px;letter-spacing:2px}.hero-copy{font-size:12px;line-height:2}.hero-offer{margin-block:24px}.hero-offer b{font-size:65px}.hero-offer small{font-size:10px}.button{width:100%;min-width:0;min-height:59px;padding:16px 22px;font-size:14px}.hero-note{font-size:10px}.hero-note span{display:block;margin:2px 0 0}.art-caption{font-size:7px;bottom:10px;right:15px}.strip-inner{grid-template-columns:1fr 1fr;padding-block:23px;gap:17px}.strip-inner>div{padding-left:20px}.strip-inner>div:last-child{grid-column:1/-1;border-left:0;border-top:1px solid #cbd4c7;padding:16px 0 0;display:flex;align-items:center;gap:17px}.strip-inner>div:last-child span{margin:0}.strip-inner>div:last-child small{display:inline;margin-left:10px;font-size:10px}.strip-inner strong{font-size:20px}.strip-inner>div:last-child strong{font-size:17px}.section{padding-block:60px}h2{font-size:27px;margin-bottom:20px}.intro{display:block}.intro-body{padding-top:8px;font-size:14px}.intro-body p:last-child{margin-bottom:0}.benefit-grid{grid-template-columns:1fr;gap:30px;margin-top:30px}.benefit-grid article{position:relative;padding:22px 0 0 61px}.number{position:absolute;left:0;top:14px;font-size:35px}.benefit-grid h3{font-size:20px;margin-top:0}.benefit-grid p{font-size:13px}.benefit-label{font-size:11px;margin-top:17px}.section-head{display:block}.section-head>p{font-size:13px}.price-grid{grid-template-columns:1fr;gap:15px}.price-card{padding:24px}.price strong{font-size:59px}.price-kind{font-size:14px}.price-bottom{font-size:11px}.details-grid{grid-template-columns:1fr;gap:25px}.date-block{display:none}.info-list>div{grid-template-columns:100px 1fr;font-size:13px;padding-block:18px}.info-list dd{overflow-wrap:anywhere}.info-list .text-link{font-size:12px}.step-grid{grid-template-columns:1fr;gap:25px;margin-bottom:0}.step-grid h3{margin:5px 0 10px}.step-grid p{margin-bottom:0;font-size:13px}.faq{padding-top:0}summary{font-size:14px;padding-right:28px}details p{font-size:13px;margin-right:7px}.join h2{font-size:31px}.join .button{min-width:0}.join-inner>p:not(.eyebrow){font-size:12px}.deadline span{font-size:12px;margin-left:12px;padding-left:12px}.trial{padding-block:50px;gap:20px}.trial h2{font-size:24px}.trial p br{display:none}.trial .eyebrow{font-size:8px}.footer-inner{gap:25px;flex-wrap:wrap}footer{padding-bottom:115px}.mobile-cta{display:flex;position:fixed;bottom:0;left:0;right:0;z-index:30;background:#faf9f4;border-top:1px solid #ccd5c7;padding:11px 15px calc(11px + env(safe-area-inset-bottom));align-items:center;gap:14px;box-shadow:0 -4px 18px #14352a12}.mobile-cta>div{flex:1;line-height:1.6}.mobile-cta strong{display:block;font-size:13px}.mobile-cta small{display:block;font-size:10px;white-space:nowrap}.mobile-cta a{background:var(--green);color:white;padding:13px 20px;font-size:13px;font-weight:700}.footer-inner>small{font-size:9px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.button{transition:none}}

/* Readability and supplied official logo — revision 2026-10-18 */
body{font-size:18px;line-height:1.9}
.header{height:112px;background:#fff}
.brand-logo{display:block;width:250px;max-width:100%;height:auto}
.brand{flex-shrink:0}
footer{background:#fff}
.header nav{font-size:16px}
.hero-copy,.intro-body{font-size:18px}
.hero-tag{font-size:16px}
.hero-sub{font-size:22px}
.eyebrow{font-size:13px}
.hero-offer>span{font-size:16px}
.hero-offer small{font-size:15px}
.hero-note{font-size:14px}
.button{font-size:18px;min-height:66px}
.strip-inner span{font-size:13px}
.strip-inner small{font-size:15px}
.benefit-grid p,.section-head>p,.details-lead,.step-grid p{font-size:18px}
.benefit-label{font-size:16px}
.price-kind{font-size:18px}
.price small,.price span,.price-bottom{font-size:16px}
.footnote{font-size:15px}
.info-list>div{font-size:17px;grid-template-columns:135px 1fr}
.info-list small,.text-link{font-size:15px}
.step-grid span{font-size:14px}
summary{font-size:18px}
details p{font-size:17px}
.join-inner>p:not(.eyebrow){font-size:18px}
.deadline span{font-size:17px}
.join .small{font-size:14px!important}
.line-link{font-size:17px}
.trial p:not(.eyebrow){font-size:17px}
.trial small{font-size:14px}
.outline{font-size:16px}
.footer-inner>small{font-size:12px}
@media(max-width:1000px){
.header nav{gap:16px;font-size:15px}
.brand-logo{width:220px}
.strip-inner small{font-size:14px}
.details-grid{grid-template-columns:.65fr 1.35fr;gap:30px}
.info-list>div{grid-template-columns:110px 1fr}
}
@media(max-width:640px){
.header{height:86px;gap:12px;padding-inline:16px}
.header .brand-logo{width:clamp(150px,43vw,190px)}
.header .nav-cta{font-size:13px;padding:10px;white-space:nowrap}
.header nav{gap:0;flex-shrink:0}
.eyebrow{font-size:11px;letter-spacing:1.3px}
.hero-tag{font-size:14px}
.hero-sub{font-size:19px}
.hero-copy,.intro-body{font-size:16px}
.hero-offer>span{font-size:14px}
.hero-offer small{font-size:14px;line-height:1.8}
.hero-note{font-size:13px}
.button{font-size:16px;padding-inline:20px;gap:16px}
.strip-inner span{font-size:12px}
.strip-inner small{font-size:14px}
.strip-inner>div:last-child{display:block}
.strip-inner>div:last-child span{margin-bottom:5px}
.strip-inner>div:last-child small{font-size:13px;display:block;margin-left:0}
.benefit-grid p,.section-head>p,.details-lead,.step-grid p{font-size:16px}
.benefit-label{font-size:14px}
.price-kind{font-size:16px}
.price small,.price span,.price-bottom{font-size:14px}
.price{gap:8px}
.price strong{font-size:54px}
.footnote{font-size:14px}
.details-grid{grid-template-columns:1fr;gap:25px}
.info-list>div{grid-template-columns:1fr;gap:6px;font-size:16px}
.info-list dt{color:#536c5a;font-size:14px}
.info-list small,.info-list .text-link{font-size:14px}
.step-grid span{font-size:13px}
summary{font-size:16px}
details p{font-size:16px}
.join-inner>p:not(.eyebrow){font-size:16px}
.deadline span{display:block;border:0;margin:4px 0 0;padding:0;font-size:16px}
.join .small{font-size:14px!important}
.line-link{font-size:16px}
.trial p:not(.eyebrow){font-size:16px}
.trial small{font-size:14px}
.trial .eyebrow{font-size:10px}
.outline{font-size:15px}
.footer-inner>small{font-size:12px}
.mobile-cta{gap:10px;padding-inline:12px}
.mobile-cta strong{font-size:15px}
.mobile-cta small{font-size:12px;white-space:normal}
.mobile-cta a{font-size:15px;padding:13px 16px;white-space:nowrap}
footer{padding-bottom:135px}
}

/* Japanese labels and concrete event copy */
.eyebrow{letter-spacing:.08em}
.art-caption{font-size:13px;letter-spacing:.02em}
.date-block strong{font-size:56px;letter-spacing:0}
.date-block span{font-size:16px;letter-spacing:.08em}
.strip-inner strong{font-family:inherit;font-size:21px}
summary:before{content:"問";font-family:inherit;font-size:18px;top:24px}
@media(max-width:1000px){.strip-inner strong{font-size:18px}}
@media(max-width:640px){
.hero h1{font-size:clamp(27px,7.8vw,38px);line-height:1.55}
.art-caption{font-size:12px}
.strip-inner strong{font-size:18px}
.strip-inner small{margin-left:0}
.join h2{font-size:clamp(25px,6.9vw,31px)}
summary:before{font-size:16px;top:25px}
}

/* Main heading size and introduction emphasis adjustment */
.hero h1{font-size:clamp(32px,3.7vw,50px)}
.intro h2 em{color:#111}
@media(max-width:640px){
.hero h1{font-size:clamp(25px,6.8vw,32px)}
}