:root{
  --pane:#1b2428;
  --frame:#131a1d;
  --deep:#0c1113;
  --mist:#e4eae9;
  --bright:#f5f9f8;
  --rain:#84969a;
  --lamp:#c69b6e;
  --lamp-d:#96714a;
  --line:rgba(228,234,233,.14);
  --line-soft:rgba(228,234,233,.07);
  --mincho:'Shippori Mincho','Hiragino Mincho ProN','Yu Mincho',serif;
  --gothic:'Zen Kaku Gothic New','Hiragino Sans','Noto Sans JP',sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}
html{scroll-behavior:smooth}
body{
  background:var(--deep);color:var(--mist);font-family:var(--gothic);font-weight:400;
  font-size:15px;line-height:2;letter-spacing:.04em;-webkit-font-smoothing:antialiased;
  background-image:
    radial-gradient(90% 60% at 78% -5%, rgba(198,155,110,.09) 0%, rgba(198,155,110,0) 55%),
    radial-gradient(130% 90% at 50% 0%, #1d272c 0%, var(--frame) 52%, var(--deep) 100%);
  background-repeat:no-repeat;
}
a{color:var(--lamp);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;display:block}
.wrap{max-width:1020px;margin:0 auto;padding:0 22px}

/* ── nav ── */
.topnav{display:flex;justify-content:space-between;align-items:center;padding:20px 0 0}
.logo{font-family:var(--mincho);font-size:17px;letter-spacing:.22em;color:var(--bright)}
.logo em{font-style:normal;color:var(--lamp)}
.logo:hover{text-decoration:none}
.navCta{font-size:12.5px;letter-spacing:.14em;color:var(--lamp);border:1px solid var(--lamp);
  padding:8px 18px;transition:.2s}
.navCta:hover{background:var(--lamp);color:var(--deep);text-decoration:none}

/* ── hero ── */
.heroWrap{position:relative;margin-top:22px;min-height:min(86svh,740px);display:flex;align-items:center;
  overflow:hidden;box-shadow:0 0 0 1px var(--line)}
.heroVis{position:absolute;inset:0;background:linear-gradient(160deg,#202b30 0%,#10171a 100%)}
.heroVis img{width:100%;height:100%;object-fit:cover}
.heroVis canvas{position:absolute;inset:0;width:100%;height:100%}
.heroVis::after{content:'';position:absolute;inset:0;
  background:linear-gradient(to right,rgba(12,17,19,.74) 0%,rgba(12,17,19,.40) 46%,rgba(12,17,19,.04) 74%),
             linear-gradient(to top,rgba(12,17,19,.50) 0%,rgba(12,17,19,0) 32%)}
.heroTxt{position:relative;z-index:1;width:100%;padding-top:72px;padding-bottom:84px}
.heroTxt .eyebrow{font-size:11px;letter-spacing:.34em;color:var(--rain);margin-bottom:16px}
h1{font-family:var(--mincho);font-weight:600;font-size:clamp(36px,6.6vw,58px);
  letter-spacing:.18em;line-height:1.22;color:var(--bright)}
h1 em{font-style:normal;color:var(--lamp)}
.heroTxt .tag{font-family:var(--mincho);font-size:clamp(16px,2.6vw,20px);letter-spacing:.14em;
  color:var(--mist);margin-top:20px}
.heroTxt .sub{font-size:14px;color:#a9b8bb;margin-top:14px;max-width:34em;text-shadow:0 1px 6px rgba(0,0,0,.5)}
.heroCap{position:absolute;right:16px;bottom:12px;z-index:2;font-size:10px;letter-spacing:.12em;
  color:rgba(228,234,233,.62);text-shadow:0 1px 6px rgba(0,0,0,.85)}
.heroHint{position:absolute;left:16px;bottom:12px;z-index:2;font-size:10px;letter-spacing:.08em;
  color:rgba(228,234,233,.42)}
@media(max-width:720px){
  .heroCap{left:16px;text-align:right}
  .heroHint{right:16px;bottom:32px}
}
/* 効果なしの元画像。WebGLキャンバスの下に敷き、キャンバスを隠すと現れる */
.heroPlain{position:absolute;inset:0;width:100%;height:100%;display:block}
.swapRow{margin-top:26px}
.swapBtn{font:inherit;font-size:11.5px;letter-spacing:.12em;color:var(--mist);
  background:rgba(12,17,19,.42);border:1px solid var(--line);padding:8px 17px;cursor:pointer;transition:.2s;
  -webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px)}
.swapBtn:hover{border-color:var(--lamp);color:var(--lamp)}
.swapBtn[aria-pressed="true"]{border-color:var(--lamp);color:var(--lamp)}
.swapBtn:focus-visible{outline:2px solid var(--lamp);outline-offset:2px}
.swapBtn[hidden]{display:none}
.ctaRow{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-top:30px}
.cta{display:inline-block;font-family:var(--mincho);font-size:15px;letter-spacing:.22em;
  color:var(--deep);background:var(--lamp);padding:15px 40px;transition:.2s;border:1px solid var(--lamp)}
.cta:hover{background:none;color:var(--lamp);text-decoration:none}
.ctaNote{font-size:11.5px;letter-spacing:.1em;color:var(--rain)}

/* ── 差し替え前提の画像枠 ── */
.shot{position:relative;background:linear-gradient(160deg,#202b30 0%,#141b1e 100%);
  box-shadow:0 0 0 1px var(--line);overflow:hidden}
.shot img{width:100%;height:100%;object-fit:cover}
.shot.empty img{display:none}
.shot.empty::after{
  content:'画像を配置してください\A' attr(data-src);
  white-space:pre;position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  text-align:center;font-size:11px;line-height:1.9;letter-spacing:.08em;color:var(--rain);
  border:1px dashed var(--line);margin:10px;padding:10px}
.shot.r32{aspect-ratio:3/2}

/* ── section ── */
section{padding:44px 0 10px}
.plate{display:flex;align-items:baseline;gap:16px;border-bottom:1px solid var(--line);
  padding-bottom:12px;margin-bottom:26px}
.plate .en{font-size:11px;letter-spacing:.3em;color:var(--lamp-d);text-transform:uppercase}
.plate .ja{font-family:var(--mincho);font-size:clamp(20px,3.4vw,26px);letter-spacing:.16em;color:var(--bright)}
.lead{font-size:14.5px;color:var(--mist);max-width:46em;margin-bottom:26px}
.lead + .lead{margin-top:-12px}

/* ── glass cards ── */
.glasses{display:grid;gap:22px;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));align-items:start}
.gcard{background:rgba(228,234,233,.028);box-shadow:0 0 0 1px var(--line-soft);
  display:flex;flex-direction:column}
.gcard .body{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1}
.gcard h3{font-family:var(--mincho);font-weight:600;font-size:19px;letter-spacing:.18em;color:var(--bright)}
.gcard .yomi{font-size:10.5px;letter-spacing:.22em;color:var(--lamp-d);margin-top:2px}
.gcard p{font-size:13px;color:var(--rain);margin-top:10px;flex:1}
.gcard .try{align-self:flex-start;font-size:12px;letter-spacing:.12em;margin-top:14px;
  color:var(--lamp);border:1px solid rgba(198,155,110,.45);padding:7px 16px;transition:.2s}
.gcard .try:hover{background:var(--lamp);color:var(--deep);text-decoration:none}

/* ── feature cards ── */
.feats{display:grid;gap:18px;grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.fcard{background:rgba(228,234,233,.028);box-shadow:0 0 0 1px var(--line-soft);padding:20px 22px}
.fcard h3{font-family:var(--mincho);font-weight:600;font-size:16.5px;letter-spacing:.14em;color:var(--bright)}
.fcard h3 span{font-size:10.5px;letter-spacing:.2em;color:var(--lamp-d);display:block;margin-bottom:6px}
.fcard p{font-size:13px;color:var(--rain);margin-top:9px}
.fcard .tints{display:flex;gap:7px;margin-top:12px;align-items:center}
.fcard .tints i{width:22px;height:22px;box-shadow:0 0 0 1px var(--line)}
.fcard .tints em{font-style:normal;font-size:11px;color:var(--rain);letter-spacing:.08em;margin-left:4px}

/* ── steps ── */
.steps{display:grid;gap:18px;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));counter-reset:step}
.step{background:rgba(228,234,233,.028);box-shadow:0 0 0 1px var(--line-soft);padding:22px;position:relative}
.step::before{counter-increment:step;content:counter(step,decimal-leading-zero);
  font-family:var(--mincho);font-size:26px;letter-spacing:.1em;color:var(--lamp);display:block;margin-bottom:10px}
.step h3{font-family:var(--mincho);font-weight:600;font-size:16px;letter-spacing:.14em;color:var(--bright)}
.step p{font-size:13px;color:var(--rain);margin-top:8px}

/* ── FAQ ── */
.faq details{border-bottom:1px solid var(--line-soft)}
.faq summary{cursor:pointer;list-style:none;display:flex;gap:14px;align-items:baseline;
  padding:16px 4px;font-size:14px;letter-spacing:.06em;color:var(--mist)}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{content:'Q';font-family:var(--mincho);color:var(--lamp);flex:none}
.faq summary:hover{color:var(--bright)}
.faq .a{display:flex;gap:14px;align-items:baseline;padding:0 4px 18px}
.faq .a::before{content:'A';font-family:var(--mincho);color:var(--rain);flex:none}
.faq .a p{font-size:13px;color:var(--rain)}

/* ── closing ── */
.closing{text-align:center;padding:78px 0 90px}
.closing h2{font-family:var(--mincho);font-weight:600;font-size:clamp(22px,4.4vw,32px);
  letter-spacing:.24em;line-height:2;color:var(--bright)}
.closing h2 em{font-style:normal;color:var(--lamp)}
.closing .cta{margin-top:30px}

/* ── disclaimer ── */
.disclaimer{border-top:1px solid var(--line-soft);padding:36px 0 30px}
.disclaimer h2{font-family:var(--mincho);font-weight:600;font-size:15px;letter-spacing:.18em;color:var(--mist);margin-bottom:14px}
.disclaimer ul{list-style:none}
.disclaimer li{font-size:11.5px;color:var(--rain);letter-spacing:.03em;line-height:1.95;margin-bottom:8px;
  padding-left:1.4em;position:relative;text-align:justify}
.disclaimer li::before{content:'—';position:absolute;left:0;color:rgba(228,234,233,.25)}
@media(min-width:900px){
  .disclaimer ul{columns:2;column-gap:44px}
  .disclaimer li{break-inside:avoid}
}
.disclaimer a{color:var(--lamp)}

/* ── footer ── */
footer{border-top:1px solid var(--line);padding:26px 0 44px;font-size:12px;color:var(--rain)}
footer .wrap{display:flex;flex-direction:column;gap:12px}
.flinks{display:flex;gap:6px 8px;flex-wrap:wrap;align-items:center}
.flinks a{color:var(--rain)}
.flinks a:hover{color:var(--lamp)}
.flinks .sep{color:var(--line);margin:0 4px}
@media(prefers-reduced-motion:no-preference){
  .heroTxt{animation:rise .8s ease both}
  @keyframes rise{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
}