:root{
  --bg:#071016;--bg2:#0b151c;--panel:#0e1a22;--line:#18303d;
  --white:#f5f7f8;--muted:#96a5ae;--blue:#00a0df;--pink:#cc4ca8;
  --max:1280px;--gutter:56px;--header:76px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;background:var(--bg)}
body{margin:0;background:linear-gradient(180deg,#061017 0%,#08121a 65%,#050a0e 100%);color:var(--white);font-family:"Noto Sans JP","Noto Sans","Yu Gothic",Meiryo,sans-serif;line-height:1.65;font-kerning:normal;font-feature-settings:"palt" 1,"kern" 1;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;font-feature-settings:inherit}
.shell{width:calc(100% - (var(--gutter) * 2));max-width:var(--max);margin-inline:auto;min-width:0}

.site-header{height:var(--header);position:fixed;z-index:50;inset:0 0 auto;background:linear-gradient(180deg,rgba(3,10,15,.97),rgba(3,10,15,.78));border-bottom:1px solid rgba(255,255,255,.08);backdrop-filter:blur(14px)}
.site-header__inner{height:100%;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:34px}
.brand{display:flex;align-items:center;min-width:0}
.brand__logo{display:block;width:154px;height:auto;max-width:100%;flex:0 0 auto}
.nav{display:flex;justify-content:flex-end;align-items:center;gap:30px;min-width:0}
.nav a{font-size:11px;font-weight:800;letter-spacing:.12em;white-space:nowrap}
.nav a:hover{color:var(--blue)}
.header-cta{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:0 17px;border:1px solid var(--blue);font-size:11px;font-weight:800;white-space:nowrap;color:#dff6ff;background:rgba(0,160,223,.05)}

.hero{min-height:720px;height:min(92vh,900px);position:relative;display:grid;align-items:end;overflow:hidden}
.hero__photo{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:60% 50%;filter:saturate(.84) contrast(1.04)}
.hero__shade{position:absolute;inset:0;background:linear-gradient(90deg,rgba(2,7,11,.93) 0%,rgba(2,7,11,.64) 36%,rgba(2,7,11,.14) 71%),linear-gradient(0deg,rgba(2,7,11,.6),transparent 44%)}
.hero__copy{position:relative;z-index:2;padding-bottom:76px}
.eyebrow{margin:0 0 14px;color:var(--blue);font-size:11px;font-weight:800;letter-spacing:.2em}
.hero__brand-title{display:block;margin-bottom:18px;color:var(--blue);font-size:12px;line-height:1.2;letter-spacing:.16em;font-weight:900}
.hero h1{font-size:clamp(58px,6vw,92px);line-height:.92;letter-spacing:-.05em;margin:0 0 25px;max-width:820px}
.hero h2{font-size:clamp(25px,2.5vw,40px);margin:0 0 18px;letter-spacing:-.03em}
.lead{max-width:670px;color:#e3e9ed;font-size:16px;margin:0}
.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 22px;border:1px solid rgba(255,255,255,.34);font-size:12px;font-weight:800;letter-spacing:.04em;transition:.2s ease}
.btn:hover{transform:translateY(-1px)}
.btn--blue{background:var(--blue);border-color:var(--blue);color:#001019}.btn--ghost{background:rgba(1,8,12,.35)}.btn--pink{background:var(--pink);border-color:var(--pink);color:#fff}
.hero__meta{position:absolute;z-index:3;right:var(--gutter);bottom:28px;text-align:right;color:#c8d0d5;font-size:9px;letter-spacing:.16em}.hero__meta span{display:block}

.photo-story{border-top:1px solid var(--line)}
.photo-story__wide{position:relative;height:min(760px,68vw);min-height:520px;overflow:hidden}
.photo-story__wide img{width:100%;height:100%;object-fit:cover;object-position:center}
.photo-story__wide:after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(0,6,9,.72),transparent 48%)}
.photo-caption{position:absolute;z-index:2;left:max(var(--gutter),calc((100vw - var(--max))/2));bottom:46px;max-width:calc(100% - (var(--gutter) * 2))}
.photo-caption span,.visual-card span{display:block;color:var(--blue);font-size:10px;font-weight:800;letter-spacing:.17em}
.photo-caption strong{display:block;font-size:clamp(24px,3vw,42px);letter-spacing:-.035em}
.photo-story__grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:2px;padding-block:2px 76px}
.visual-card{background:var(--panel);overflow:hidden;min-width:0}.visual-card img{width:100%;height:440px;object-fit:cover}.visual-card>div{padding:26px 28px 32px}.visual-card h3{margin:4px 0 8px;font-size:22px;letter-spacing:-.02em}.visual-card p{margin:0;color:var(--muted);font-size:13px}

.airflow,.engineering,.other-honda{padding:96px 0}
.section-head{max-width:790px}.section-head h2{font-size:clamp(40px,5vw,68px);line-height:1;margin:0 0 20px;letter-spacing:-.05em}.section-head>p:last-child{color:var(--muted);max-width:680px}
.flow-line{height:1px;margin:60px 0 -1px;background:linear-gradient(90deg,var(--blue),rgba(0,160,223,.12))}
.flow-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-left:1px solid var(--line);border-top:1px solid var(--line)}
.flow-card{min-height:220px;padding:28px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);display:flex;flex-direction:column;gap:9px;transition:.22s ease;background:linear-gradient(180deg,rgba(12,26,35,.78),rgba(6,14,19,.48));min-width:0}
.flow-card:hover{background:#0b202b;transform:translateY(-2px)}.flow-card__num{color:var(--blue);font-weight:900;font-size:28px}.flow-card strong{font-size:16px}.flow-card small{color:var(--muted);overflow-wrap:anywhere}.flow-card em{margin-top:auto;color:#b9ddec;font-size:10px;font-style:normal;letter-spacing:.1em}.fitment-note{margin-top:18px;color:#70818b;font-size:11px}

.feature-split{background:#04090c;border-block:1px solid var(--line);padding:72px 0}
.feature-split__inner{display:grid;grid-template-columns:minmax(300px,.72fr) minmax(0,1.28fr);align-items:stretch;min-height:600px;border:1px solid var(--line);background:#060d12}
.feature-split__copy{align-self:center;padding:56px 54px;min-width:0}
.feature-split__copy h2{font-size:clamp(38px,4.2vw,64px);line-height:.98;letter-spacing:-.05em;margin:0 0 22px}.feature-split__copy p:not(.eyebrow){color:var(--muted)}
.text-link{display:inline-block;margin-top:16px;padding-bottom:4px;border-bottom:1px solid var(--blue);font-size:12px;font-weight:800}
.feature-split__image{overflow:hidden;min-width:0}.feature-split__image img{width:100%;height:100%;min-height:600px;object-fit:cover}

.process-grid{list-style:none;padding:0;margin:50px 0 0;display:grid;grid-template-columns:repeat(6,minmax(0,1fr));border:1px solid var(--line)}
.process-grid li{padding:26px 20px 28px;min-height:160px;border-right:1px solid var(--line);display:flex;flex-direction:column;min-width:0}.process-grid li:last-child{border-right:0}.process-grid b{color:var(--blue);font-size:12px}.process-grid strong{margin-top:auto;font-size:19px}.process-grid span{font-size:11px;color:var(--muted)}
.other-honda{border-top:1px solid var(--line)}.platform-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:2px;margin-top:42px}.platform-grid>div{background:#0c171e;padding:32px;min-width:0}.platform-grid span{color:var(--blue);font-size:10px;font-weight:800}.platform-grid strong{display:block;margin-top:20px;font-size:19px}

.purchase{padding:90px 0;background:radial-gradient(circle at 18% 50%,rgba(204,76,168,.18),transparent 34%),#070a0d;border-block:1px solid #2a1b29}
.purchase__inner{display:grid;grid-template-columns:minmax(260px,.62fr) minmax(0,1fr);gap:72px;align-items:center}
.purchase__brand{display:flex;align-items:center;justify-content:flex-start;min-height:190px;padding-right:54px;border-right:1px solid rgba(255,255,255,.12);min-width:0}
.r70-logo{display:block;width:min(250px,100%);height:auto;max-width:100%}
.purchase h2{font-size:clamp(35px,4vw,57px);line-height:1.1;letter-spacing:-.045em;margin:0 0 18px}.purchase p:not(.eyebrow){color:#b1b8bd;max-width:680px}

.footer{border-top:1px solid var(--line);background:#04090c}.footer__inner{min-height:168px;display:flex;align-items:center;justify-content:space-between;gap:48px}.footer__logo{display:block;width:168px;height:auto;max-width:42vw;flex:0 0 auto}.footer__copy{margin:0;color:#5f717c;font-size:9px;letter-spacing:.14em;white-space:nowrap}
.scroll-control{position:fixed;right:20px;bottom:20px;z-index:60;width:62px;height:62px;border:1px solid rgba(255,255,255,.23);border-radius:50%;background:rgba(3,10,14,.78);color:#fff;backdrop-filter:blur(10px);cursor:pointer;display:grid;place-items:center;font:inherit}.scroll-control__text{font-size:7px;letter-spacing:.12em;margin-top:10px}.scroll-control__arrow{font-size:18px;line-height:1;margin-top:-8px}
.reveal{opacity:1;transform:none}.js .reveal{opacity:0;transform:translateY(22px);transition:opacity .75s ease,transform .75s ease}.js .reveal.is-visible{opacity:1;transform:none}


.faq{padding:96px 0;border-top:1px solid var(--line)}
.faq-list{margin-top:42px;border-top:1px solid var(--line)}
.faq-list details{border-bottom:1px solid var(--line);padding:0}
.faq-list summary{cursor:pointer;list-style:none;padding:24px 48px 24px 0;position:relative;font-size:18px;font-weight:800;letter-spacing:-.02em}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{content:"＋";position:absolute;right:0;top:24px;color:var(--blue);font-size:20px}
.faq-list details[open] summary::after{content:"−"}
.faq-list p{max-width:860px;margin:0;padding:0 0 26px;color:var(--muted);font-size:14px}
.footer__nav{display:flex;flex-wrap:wrap;gap:18px 24px;justify-content:center}.footer__nav a{font-size:10px;color:#91a0a9}.footer__nav a:hover{color:#fff}
.photo-story,.airflow,.feature-split,.engineering,.other-honda,.faq,.purchase{content-visibility:auto;contain-intrinsic-size:800px}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.js .reveal{opacity:1;transform:none;transition:none}.scroll-control{transition:none}}

@media(max-width:1120px){
  :root{--gutter:34px}
  .site-header__inner{gap:22px}.brand__logo{width:142px}.nav{gap:20px}.nav a{font-size:10px}.header-cta{font-size:10px;padding-inline:13px}
  .feature-split__copy{padding:44px 38px}
}
@media(max-width:900px){
  :root{--gutter:28px}
  .site-header__inner{grid-template-columns:auto 1fr}.nav{display:none}.header-cta{justify-self:end}
  .hero{height:820px}.hero__copy{padding-bottom:100px}.hero__photo{object-position:58% center}
  .photo-story__grid,.feature-split__inner,.purchase__inner{grid-template-columns:1fr}.feature-split{padding:56px 0}.feature-split__copy{padding:52px 44px}.feature-split__image img{min-height:520px;height:58vw;max-height:650px}.flow-grid{grid-template-columns:1fr 1fr}.process-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.process-grid li:nth-child(3){border-right:0}.process-grid li:nth-child(-n+3){border-bottom:1px solid var(--line)}
  .purchase__inner{gap:42px}.purchase__brand{min-height:auto;border-right:0;border-bottom:1px solid rgba(255,255,255,.12);padding:0 0 40px}.r70-logo{width:230px}.platform-grid{grid-template-columns:1fr 1fr}.visual-card img{height:360px}
}
@media(max-width:640px){
  :root{--header:64px;--gutter:18px}
  .brand__logo{width:118px}.header-cta{font-size:9px;padding:8px 10px;min-height:36px}
  .hero{height:760px;min-height:690px}.hero__shade{background:linear-gradient(0deg,rgba(2,7,11,.95) 0%,rgba(2,7,11,.62) 55%,rgba(2,7,11,.18) 100%)}.hero__photo{object-position:57% center}.hero__copy{padding-bottom:82px}.hero h1{font-size:47px}.hero h2{font-size:26px}.lead{font-size:13px}.hero__meta{display:none}
  .photo-story__wide{min-height:480px;height:72vh}.photo-caption{left:var(--gutter);bottom:26px;right:var(--gutter)}.photo-story__grid{grid-template-columns:1fr;width:100%;max-width:none;padding-bottom:36px}.visual-card img{height:390px}.visual-card>div{padding:22px 20px}
  .airflow,.engineering,.other-honda{padding:70px 0}.section-head h2{font-size:44px}.platform-grid{grid-template-columns:1fr}.flow-grid{grid-template-columns:1fr}.flow-card{min-height:170px}.feature-split{padding:40px 0}.feature-split__inner{width:calc(100% - 36px)}.feature-split__copy{padding:38px 24px}.feature-split__image img{min-height:430px;height:110vw;max-height:560px}.process-grid{grid-template-columns:1fr 1fr}.process-grid li{border-bottom:1px solid var(--line)}.process-grid li:nth-child(odd){border-right:1px solid var(--line)}.process-grid li:nth-child(even){border-right:0}.purchase{padding:70px 0}.r70-logo{width:220px}.footer__inner{min-height:150px;display:grid;grid-template-columns:1fr;justify-items:start;gap:24px;padding-block:38px}.footer__logo{width:140px;max-width:45vw}.footer__nav{justify-content:flex-start}.footer__copy{font-size:8px}.scroll-control{width:54px;height:54px;right:14px;bottom:14px}
}