:root{
  --ink:#17324a;
  --muted:#5d7180;
  --accent:#2f8c99;
  --accent-dark:#176778;
  --mint:#62cbbd;
  --blue:#20588d;
  --soft:#f1f8fa;
  --line:#dbe7eb;
  --white:#fff;
  --dark:#12344a;
  --max:1220px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP","Noto Sans SC","Hiragino Kaku Gothic ProN",Meiryo,sans-serif;
  color:var(--ink);background:#fff;line-height:1.75
}
img{max-width:100%}
.wrap{width:min(var(--max),calc(100% - 48px));margin:auto}

/* Header */
.site-header{
  position:sticky;top:0;z-index:30;background:rgba(255,255,255,.96);
  backdrop-filter:blur(14px);border-bottom:1px solid var(--line)
}
.nav-wrap{display:flex;align-items:center;gap:28px;min-height:88px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink);font-weight:850;white-space:nowrap}
.brand-logo{width:58px;height:58px;object-fit:contain;display:block}
.brand-name{font-family:Georgia,"Times New Roman",serif;font-size:22px;letter-spacing:-.01em}
.brand-mark{display:grid;place-items:center;width:36px;height:36px;border-radius:50%;background:var(--accent);color:#fff;font-size:20px}
.nav-links{display:flex;align-items:center;gap:22px;margin-left:auto}
.nav-links a{color:var(--ink);text-decoration:none;font-size:14px;font-weight:650}
.nav-links a:hover{color:var(--accent)}
.nav-cta{background:var(--ink);color:#fff!important;padding:10px 17px;border-radius:999px}
.lang-toggle{display:flex;border:1px solid var(--line);border-radius:999px;padding:3px;background:#fff}
.lang-btn{border:0;background:transparent;padding:7px 10px;border-radius:999px;cursor:pointer;font-size:12px}
.lang-btn.active{background:var(--accent);color:#fff}

/* Hero */
.hero{
  position:relative;overflow:hidden;padding:82px 0 78px;
  background:
    radial-gradient(circle at 78% 22%,rgba(98,203,189,.18),transparent 30%),
    linear-gradient(135deg,#f8fcfd 0%,#eef8fa 58%,#e9f5f7 100%)
}
.hero:after{
  content:"";position:absolute;left:-8%;right:-8%;bottom:-125px;height:190px;
  background:linear-gradient(100deg,rgba(76,191,178,.88),rgba(31,91,143,.94));
  transform:rotate(4deg);transform-origin:center;opacity:.12;pointer-events:none
}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.02fr .98fr;gap:64px;align-items:center}
.eyebrow{margin:0 0 13px;color:var(--accent-dark);font-weight:850;letter-spacing:.12em;font-size:13px}
.hero h1{font-size:clamp(43px,5.1vw,70px);line-height:1.13;letter-spacing:-.045em;margin:0 0 25px}
.lead{font-size:18px;color:#405d6d;max-width:720px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:30px 0}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:14px 21px;border-radius:11px;text-decoration:none;font-weight:800;transition:.18s ease}
.btn:hover{transform:translateY(-1px)}
.btn.primary{background:linear-gradient(135deg,var(--accent),var(--accent-dark));color:#fff;box-shadow:0 10px 26px rgba(23,103,120,.18)}
.btn.secondary{background:#fff;color:var(--ink);border:1px solid var(--line)}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chips span{background:rgba(255,255,255,.9);border:1px solid var(--line);border-radius:999px;padding:7px 12px;font-size:13px}
.hero-visual{position:relative}
.hero-visual:before{content:"";position:absolute;inset:-14px 18px 14px -14px;border:1px solid rgba(47,140,153,.18);border-radius:28px}
.hero-visual img{position:relative;width:100%;aspect-ratio:1.22/1;object-fit:cover;border-radius:24px;box-shadow:0 28px 70px rgba(20,55,72,.18)}
.hero-card{
  position:absolute;right:18px;bottom:18px;background:rgba(255,255,255,.95);padding:15px 18px;
  border-radius:14px;box-shadow:0 14px 40px rgba(15,49,62,.18);display:flex;align-items:center;gap:18px;min-width:300px
}
.hero-card strong{font-size:12px;letter-spacing:.13em;color:var(--ink)}
.hero-card small{color:var(--muted)}

/* Sections */
.section{padding:92px 0}
.soft{background:var(--soft)}
.split{display:grid;grid-template-columns:.9fr 1.1fr;gap:72px;align-items:start}
.section h2{font-size:clamp(30px,4vw,48px);line-height:1.25;margin:0 0 18px;letter-spacing:-.03em}
.section-intro{max-width:780px;color:var(--muted);margin-bottom:36px}
.check-list{list-style:none;padding:0;margin:0;display:grid;gap:12px}
.check-list li{background:#fff;padding:18px 20px;border-radius:14px;border:1px solid var(--line);font-weight:650;box-shadow:0 5px 18px rgba(25,64,78,.035)}
.check-list li:before{content:"✓";display:inline-grid;place-items:center;width:24px;height:24px;border-radius:50%;background:#e2f4f1;color:var(--accent-dark);font-weight:900;margin-right:11px}
.cards{display:grid;gap:18px}
.cards.four{grid-template-columns:repeat(4,1fr)}
.card{border:1px solid var(--line);border-radius:18px;padding:25px;background:#fff;box-shadow:0 8px 26px rgba(20,55,72,.045)}
.card .num{font-size:12px;color:var(--accent);font-weight:900;letter-spacing:.14em}
.card h3{margin:10px 0;font-size:20px}
.card p{color:var(--muted);font-size:14px}
.software{margin-top:26px;display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.software span,.software strong{border:1px solid var(--line);border-radius:999px;padding:8px 13px;background:#fff;font-size:13px}

/* Why */
.dark{background:linear-gradient(135deg,#12344a,#102b38);color:#fff}
.dark .eyebrow{color:#83d8d0}.dark p{color:#d1e2e7}
.stats{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.stats div{border:1px solid rgba(255,255,255,.14);border-radius:16px;padding:22px;background:rgba(255,255,255,.035)}
.stats strong{display:block;font-size:22px;color:#fff;margin-bottom:5px}
.stats span{font-size:14px;color:#c4d8de}

/* Pricing */
.pricing{display:grid;grid-template-columns:1fr 1fr;gap:22px;max-width:940px}
.price-card{border:1px solid var(--line);border-radius:20px;padding:30px;background:#fff}
.price-card.featured{border:2px solid var(--accent);box-shadow:0 16px 42px rgba(22,125,141,.13)}
.plan{font-size:12px;letter-spacing:.14em;color:var(--accent);font-weight:900}
.price-card h3{font-size:26px;margin:6px 0}
.price strong{font-size:44px;line-height:1}
.price span{margin-left:6px;color:var(--muted);font-size:13px}
.price-card ul{padding-left:20px}
.notice{margin-top:24px;padding:20px 22px;background:#f7fbfc;border:1px solid var(--line);border-radius:14px}
.notice p{margin:.4em 0}.notice small{color:var(--muted)}

/* Scope / flow */
.scope-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.scope-grid article{background:#fff;border:1px solid var(--line);border-radius:18px;padding:28px}
.scope-grid h3{margin-top:0}.scope-grid li{margin:8px 0}.fine{margin-top:22px;color:var(--muted)}
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.flow>div{padding:24px;border-top:4px solid var(--accent);background:#f8fbfc;border-radius:0 0 14px 14px}
.flow>div>span{font-weight:900;color:var(--accent)}
.flow h3{font-size:18px}.flow p{font-size:14px;color:var(--muted)}

/* Contact */
.contact{background:linear-gradient(135deg,#eaf6f7,#f9fcfc)}
.contact .wrap{max-width:1160px}
.contact-list{display:grid;gap:12px;margin-top:28px}
.contact-list>a,.contact-list>div{
  display:grid;grid-template-columns:90px 1fr;gap:8px 14px;align-items:start;background:#fff;
  border:1px solid var(--line);border-radius:13px;padding:15px 17px;text-decoration:none;color:var(--ink)
}
.contact-list small{grid-column:2;color:var(--muted)}
.contact-qr-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;margin-top:26px;width:100%}
.qr-card{background:#fff;border-radius:20px;padding:24px;text-align:center;border:1px solid var(--line);box-shadow:0 15px 45px rgba(15,49,62,.07)}
.contact-qr-row>.qr-card{width:100%;margin:0}
.contact-qr-row>.qr-card img{display:block;width:280px;height:280px;max-width:100%;object-fit:contain;margin:0 auto;border-radius:12px}
.qr-card strong{display:block;font-size:22px;margin-top:9px}
.qr-card p{margin:3px 0;color:var(--muted)}

/* Privacy / Footer */
.privacy{padding:54px 0;background:#fafcfc;border-top:1px solid var(--line)}
.privacy h2{font-size:22px}.privacy p{font-size:13px;color:var(--muted)}.privacy a{color:var(--accent)}
footer{background:#0d2735;color:#c9d9dd;padding:28px 0}
.footer-row{display:flex;justify-content:space-between;align-items:center;gap:20px;font-size:13px}
.footer-brand{color:#fff}.footer-logo{width:38px;height:38px;object-fit:contain}

/* Tablet */
@media(max-width:980px){
  .nav-links{display:none}.nav-wrap{min-height:72px}.lang-toggle{margin-left:auto}
  .brand-logo{width:46px;height:46px}.brand-name{font-size:18px}
  .hero-grid,.split{grid-template-columns:1fr}.hero{padding-top:54px}
  .hero-visual{order:-1}.hero-visual img{aspect-ratio:16/10}
  .cards.four{grid-template-columns:1fr 1fr}.flow{grid-template-columns:1fr 1fr}
}

/* Mobile */
@media(max-width:640px){
  .wrap{width:min(100% - 28px,var(--max))}
  .nav-wrap{gap:10px}.brand{gap:7px}.brand-logo{width:38px;height:38px}.brand-name{font-size:13px}
  .lang-btn{padding:5px 7px;font-size:11px}
  .hero{padding:36px 0 52px}.hero h1{font-size:38px}.lead{font-size:16px}
  .hero-card{position:relative;right:auto;bottom:auto;margin:-30px 16px 0;min-width:0;justify-content:center}
  .section{padding:64px 0}.cards.four,.pricing,.scope-grid,.flow{grid-template-columns:1fr}.stats{grid-template-columns:1fr}
  .contact-list>a,.contact-list>div{grid-template-columns:1fr}.contact-list small{grid-column:1}
  .contact-qr-row{grid-template-columns:1fr}.contact-qr-row>.qr-card{max-width:420px;margin:auto}
  .footer-row{align-items:flex-start;flex-direction:column}
}