:root{
  --ink:#0D1F1A; --ink-2:#36433E; --muted:#5C6964; --muted-d:#B7C7C1;
  --accent:#2FD5A4; --green:#06705A; --mint:#E6FBF6; --mint-2:#DDF7EE;
  --gray:#F3F5F4; --line:#DCE3E0; --line-d:rgba(255,255,255,.14);
  --radius:18px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{margin:0;font-family:'Noto Sans JP',system-ui,sans-serif;color:var(--ink);background:#fff;line-height:1.75;font-size:16px;-webkit-font-smoothing:antialiased}
h1,h2,h3,p{margin:0}
a{color:var(--green)}
img{max-width:100%}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

.wrap{max-width:1240px;margin:0 auto;padding:0 24px}
.wrap.narrow{max-width:1100px}
.dark{background:var(--ink);color:#fff}
.gray-bg{background:var(--gray)}
.muted{color:var(--ink-2)} .dark .muted{color:var(--muted-d)}
.small{font-size:14px} .tiny{font-size:12px}
.center{text-align:center}
.en{font-family:Inter,sans-serif}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;text-align:center;border-radius:999px;font-weight:700;text-decoration:none;line-height:1.5;transition:opacity .15s}
.btn:hover{opacity:.88}
.btn-sm{min-height:44px;padding:0 18px;font-size:14px}
.btn-lg{min-height:56px;padding:10px 28px;font-size:15px}
.btn-primary{background:var(--accent);color:var(--ink);font-weight:800}
.btn-ghost{border:1px solid rgba(255,255,255,.35);color:#fff}

/* header */
.site-header{position:sticky;top:0;z-index:20;background:var(--ink);color:#fff;border-bottom:1px solid rgba(255,255,255,.08)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:12px;padding-bottom:12px}
.logo{display:inline-flex;align-items:center;min-height:44px}
.logo img{height:24px;width:auto;filter:brightness(0) invert(1)}
.header-nav{display:flex;gap:10px}

/* hero */
.hero-inner{display:flex;flex-wrap:wrap;gap:56px;align-items:center;padding-top:72px;padding-bottom:104px}
.hero-copy{flex:1 1 520px;min-width:0;display:flex;flex-direction:column;gap:26px}
.eyebrow-ja{font-weight:700;color:var(--accent)}
.hero h1{font-size:50px;line-height:1.3;font-weight:900;letter-spacing:-.02em}
.hero-sub{font-size:24px;line-height:1.5;font-weight:700;margin-top:-8px}
.lead{color:var(--muted-d);max-width:560px}
.cta-row{display:flex;flex-wrap:wrap;gap:12px}
.cta-col{display:flex;flex-direction:column;gap:10px;width:100%}

.demo{flex:1 1 460px;min-width:0;background:#fff;color:var(--ink);border-radius:20px;padding:24px;display:flex;flex-direction:column;gap:18px}
.demo-tabs{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:6px}
.demo-tabs button{min-height:44px;border-radius:999px;font:inherit;font-size:13px;font-weight:700;cursor:pointer;padding:0 6px;border:1px solid var(--line);background:#fff;color:var(--ink-2)}
.demo-tabs button[aria-selected="true"]{border-color:var(--ink);background:var(--ink);color:#fff}
.demo-panel{min-height:250px;display:flex;flex-direction:column;gap:12px;animation:fade .35s ease}
.demo-panel[hidden]{display:none}
@keyframes fade{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}
.demo-row{display:flex;gap:16px;min-height:250px}
.demo-img{flex:0 0 44%;width:44%;height:250px;object-fit:cover;border-radius:12px;min-width:0}
.demo-title{font-size:20px;font-weight:900;line-height:1.5}
.stack-sm{display:flex;flex-direction:column;gap:10px}
.label{font-size:12px;font-weight:700;color:var(--muted)}
.label-green{color:var(--green)}
.demo-box{border:1px solid #E3E8E6;border-radius:12px;padding:14px 16px;display:flex;flex-direction:column;gap:6px;font-weight:700}
.check{display:flex;gap:10px;font-size:15px;padding:12px 14px;border-radius:10px;background:var(--mint)}
.check::before{content:"✓";color:var(--green);font-weight:900}
.lang-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.lang-list li{display:flex;align-items:center;justify-content:space-between;gap:12px;border:1px solid #E3E8E6;border-radius:10px;padding:10px 14px;font-size:14px}
.lang-list b{font-family:Inter,sans-serif;font-weight:800;font-size:13px;display:inline-block;width:32px}
.pill{font-size:12px;font-weight:700;padding:2px 10px;border-radius:999px;background:var(--mint-2);color:var(--green);margin-left:8px;white-space:nowrap}

.placeholder{border-radius:10px;background:#F1F3F2;border:1px dashed #B9C3BF;display:flex;align-items:center;justify-content:center;text-align:center;font-size:12px;color:var(--muted);padding:0 8px}

/* logos */
.logos{background:var(--gray)}
.logos-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:16px 40px;padding-top:26px;padding-bottom:26px}
.logos-inner p{font-size:14px;font-weight:700;color:var(--ink-2)}
.logo-row{display:flex;gap:16px}
.logo-box{width:220px;height:56px;background:#fff;border-radius:10px;display:flex;align-items:center;justify-content:center;padding:8px 16px}
.logo-box img{max-height:40px;max-width:100%;width:auto;height:auto}
.logo-box--dark{background:var(--ink)}

/* sections */
.section{padding:112px 0}
.sec-head{display:flex;flex-direction:column;gap:14px;max-width:820px;margin-bottom:44px}
.sec-head.center{align-items:center;text-align:center;margin-left:auto;margin-right:auto}
.eyebrow{font-family:Inter,sans-serif;font-weight:800;font-size:14px;letter-spacing:.08em;color:var(--green)}
.dark .eyebrow{color:var(--accent)}
h2{font-size:44px;line-height:1.35;font-weight:900;letter-spacing:-.01em}
.sub{color:var(--ink-2)}
.grid-3{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:20px}
.grid-4{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:16px}
.card{border-radius:var(--radius);padding:32px 28px;display:flex;flex-direction:column;gap:14px}
.card.gray{background:var(--gray)}
.card.white{background:#fff;padding:24px;gap:12px}
.card.outline{border:1px solid var(--line-d)}
.card h3{font-size:21px;line-height:1.55;font-weight:900}
.card.outline p{font-size:15px}
.num{font-family:Inter,sans-serif;font-weight:800;font-size:40px;line-height:1;color:var(--green)}
.issue p{font-size:17px}
.bridge{margin-top:44px;font-size:26px;font-weight:900;text-align:center}
.step-label{font-family:Inter,sans-serif;font-weight:800;font-size:13px;color:var(--green)}
.sample-img{width:100%;height:120px;object-fit:cover;border-radius:10px}
.note{font-size:14px;padding:10px 12px;border-radius:8px;background:var(--mint)}
.sheet{width:100%;border-collapse:collapse;font-size:12px;border:1px solid var(--line);border-radius:8px;overflow:hidden}
.sheet th{background:var(--ink);color:#fff;text-align:left;padding:6px 8px}
.sheet td{padding:6px 8px;border-top:1px solid #EEF1F0}

/* compare */
.compare{border-radius:16px;border:1px solid var(--line-d);overflow:hidden;margin-bottom:20px}
.cmp-row{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));font-size:15px}
.cmp-row + .cmp-row{border-top:1px solid rgba(255,255,255,.12)}
.cmp-row > span{padding:16px 20px;color:var(--muted-d)}
.cmp-row > span:first-child{color:#fff;font-weight:700}
.cmp-row > .us{background:rgba(47,213,164,.12);color:#fff;font-weight:700}
.cmp-head > span{padding:18px 20px;font-weight:700}
.cmp-head > .us{background:var(--accent);color:var(--ink);font-weight:900}

/* flow */
.split{display:flex;flex-wrap:wrap;gap:48px}
.split-text{flex:1 1 380px;min-width:0;display:flex;flex-direction:column;gap:16px}
.split-text h2{font-size:40px;line-height:1.4}
.split-body{flex:1 1 460px;min-width:0;display:flex;flex-direction:column;gap:12px}
.flow{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:12px}
.flow li{display:flex;gap:16px;border:1px solid var(--line);border-radius:14px;padding:18px 22px}
.num-s{font-family:Inter,sans-serif;font-weight:800;color:var(--green);flex:0 0 28px}
.flow-t{font-weight:900}
.flow .pill{background:var(--mint)}
.sample-box{border-radius:14px;background:var(--ink);color:#fff;padding:22px 24px;display:flex;flex-direction:column;gap:6px}
.sample-box .small{color:var(--muted-d)}
.sample-t{font-weight:900;color:var(--accent)}

/* faq */
.faq-wrap{max-width:880px;display:flex;flex-direction:column;gap:12px}
.faq-wrap h2{font-size:36px;margin-bottom:16px}
.faq{background:#fff;border-radius:14px;overflow:hidden}
.faq summary{list-style:none;cursor:pointer;min-height:56px;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 24px;font-weight:700}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-family:Inter,sans-serif;font-size:20px;color:var(--green);flex:0 0 auto}
.faq[open] summary::after{content:"−"}
.faq p{padding:0 24px 22px;font-size:15px;color:var(--ink-2)}
.q{color:var(--green);font-weight:700;margin-right:8px}

/* closing */
.closing{padding:128px 0}
.closing-inner{max-width:920px;display:flex;flex-direction:column;align-items:center;gap:24px;text-align:center}
.closing h2{font-size:44px;line-height:1.4}
.center-row{justify-content:center;padding-top:8px}

/* footer */
.site-footer{background:#08140F;color:var(--muted-d);font-size:13px}
.footer-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;padding-top:28px;padding-bottom:28px}
.footer-inner nav{display:flex;gap:20px}
.footer-inner a{color:var(--muted-d)}

/* visibility helpers */
.show-sp,.show-sp-flex{display:none}

@media (max-width: 767px){
  body{font-size:15px}
  .wrap{padding:0 16px}
  .hide-sp,.hide-sp-flex{display:none !important}
  .show-sp{display:inline}
  br.show-sp{display:inline}
  .show-sp-flex{display:flex}
  .header-inner{padding-top:10px;padding-bottom:10px}
  .logo img{height:20px}
  .header-nav{gap:6px}
  .header-nav .btn-ghost{width:44px;padding:0}
  .hero-inner{gap:20px;padding-top:40px;padding-bottom:48px}
  .hero-copy{gap:20px;flex-basis:100%}
  .eyebrow-ja{font-size:13px}
  .hero h1{font-size:32px;line-height:1.4}
  .hero-sub{font-size:18px;margin-top:-6px}
  .lead{font-size:14px}
  .demo{padding:16px;border-radius:16px;gap:14px;flex-basis:100%}
  .demo-tabs{gap:4px}
  .demo-tabs button{font-size:12px;padding:0 4px}
  .demo-panel,.demo-row{min-height:230px}
  .demo-row{flex-direction:column;gap:10px}
  .demo-img{flex:0 0 auto;width:100%;height:150px}
  .demo-title{font-size:17px}
  .btn-lg{font-size:14px;width:100%}
  .logo-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));width:100%;gap:10px}
  .logo-box{width:auto}
  .section{padding:64px 0}
  .sec-head{margin-bottom:24px;gap:10px}
  .eyebrow{font-size:12px}
  h2,.split-text h2,.closing h2{font-size:26px;line-height:1.45}
  .grid-3,.grid-4{grid-template-columns:1fr;gap:12px}
  .card{padding:22px 20px}
  .issue{flex-direction:row;gap:14px}
  .issue .num{font-size:24px;line-height:1.2}
  .issue p{font-size:15px}
  .card h3{font-size:18px}
  .card.outline p{font-size:14px}
  .bridge{margin-top:24px;font-size:19px;line-height:1.6}
  /* compare → cards */
  .compare{border:0;border-radius:0;display:flex;flex-direction:column;gap:12px}
  .cmp-head{display:none}
  .cmp-row{display:flex;flex-direction:column;border:1px solid var(--line-d);border-radius:14px;overflow:hidden}
  .cmp-row + .cmp-row{border-top:1px solid var(--line-d)}
  .cmp-row > span{padding:8px 16px;font-size:13px;display:flex;justify-content:space-between;gap:12px;border-top:1px solid rgba(255,255,255,.1)}
  .cmp-row > span:first-child{padding:12px 16px;font-size:15px;font-weight:900;border-top:0}
  .cmp-row > span[data-l]::before{content:attr(data-l);color:var(--muted-d);font-weight:400}
  .cmp-row > .us::before{color:var(--accent) !important;font-weight:700 !important}
  .cmp-row > .us{text-align:right}
  .split{gap:20px}
  .flow li{padding:16px;gap:14px}
  .faq-wrap h2{font-size:26px}
  .faq summary{padding:16px;font-size:15px;line-height:1.6}
  .faq p{padding:0 16px 18px;font-size:14px}
  .closing{padding:72px 0 80px}
  .closing-inner{align-items:stretch;text-align:left}
  .center-row{flex-direction:column}
  .footer-inner{flex-direction:column;align-items:flex-start}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  .demo-panel{animation:none}
}